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? 2002 microchip technology inc. ds21752a-page 1 m mcp1252/3 features ? inductorless, buck/boost, dc/dc converter ? low power: 80 a (typical) ? high output voltage accuracy: - 2.5% (v out fixed) ? 120 ma output current ? wide operating temperature range: - -40c to +85c ? thermal shutdown and short-circuit protection ? uses small ceramic capacitors ? switching frequency: - mcp1252: 650 khz - mcp1253: 1 mhz ? low power shutdown mode: 0.1 a (typical) ? shutdown input compatible with 1.8v logic ?v in range: 2.0v to 5.5v ? selectable output voltage (3.3v or 5.0v) or adjustable output voltage ? space-saving, 8-lead msop ? soft-start circuitry to minimize in-rush current applications ? white led backlighting ? color display bias ? local 3v-to-5v conversions ? flash memory supply voltage ? sim interface supply for gsm phones ? smart card readers ? pcmcia local 5v supplies description the mcp1252/3 are inductorless, positive-regulated charge pump dc/dc converters. the devices generate a regulated fixed (3.3v or 5.0v) or adjustable output voltage. they are specifically designed for applications requiring low noise and high efficiency and are able to deliver up to 120 ma output current. the devices allow the input voltage to be lower or higher than the output voltage, by automatically switching between buck/ boost operation. the mcp1252 has a switching frequency of 650 khz, avoiding interference with sensitive if bands. the mcp1253 has a switching frequency of 1 mhz and allows the use of smaller capacitors than the mcp1252, thus saving board space and cost. both devices feature a power-good output that can be used to detect out-of-regulation conditions. extremely low supply current and low external parts count (three capacitors) make these devices ideal for small, battery- powered applications. a shutdown mode is also pro- vided for further power reduction. the mcp1252 and mcp1253 feature thermal and short-circuit protection and are offered in space-saving, 8-lead, msop packages. package types msop (fixed) msop (adjustable) pgood v out v in gnd select shdn c+ c- 1 2 3 4 8 7 6 5 pgood v out v in gnd fb shdn c+ c- 1 2 3 4 8 7 6 5 mcp1252 mcp1253 mcp1252 mcp1253 low noise, positive-regulated charge pump
mcp1252/3 ds21752a-page 2 ? 2002 microchip technology inc. functional block diagram pgood 200 mv 1.21v 84 mv + + + switch control v out v in gnd c- c+ shdn select mcp1252-33x50 173 k ? 140 k ? 100 k ? + - + - + - pgood 200 mv 1.21v 84 mv + + + switch control v out v in gnd c- c+ shdn fb mcp1252-adj + - + - + - mcp1253-33x50 mcp1253-adj
? 2002 microchip technology inc. ds21752a-page 3 mcp1252/3 1.0 electrical characteristics absolute maximum ratings ? power supply voltage, v in ...............................................6.0v voltage on any pin w.r.t. gnd ............... -0.3v to (v in + 0.3v) output short circuit duration ................................continuous storage temperature range.........................-65c to +150c ambient temperature with power applied ....-55c to +125c junction temperature ................................................. +150c esd ratings: human body model (1.5 k ? in series with 100 pf ...... 4kv machine body model (200 pf, no series resistance 400v ?notice: stresses above those listed under ?maximum rat- ings? may cause permanent damage to the device. this is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. expo- sure to maximum rating conditions for extended periods may affect device reliability. pin function table electrical characteristics name function pgood open-drain power good output v out regulated output voltage v in power supply input gnd ground terminal c- flying capacitor negative terminal c+ flying capacitor positive terminal shdn shutdown mode, active-low input select output voltage select pin. (mcp1252-33x50, mcp1253-33x50) fb feedback input pin for adjustable output (mcp1252-adj, mcp1253-adj) electrical specifications: unless otherwise specified, all limits are specified for t a = -40c to +85c, shdn = v in , c in = c out = 10 f, c fly = 1 f, i out = 10 ma. typical values are for t a = +25c. parameters sym min typ max units conditions selectable output - mcp1252-33x50, mcp1253-33x50: select = v in , v out = 3.3v supply voltage v in 2.1 ? 5.5 v output voltage accuracy v out -2.5 +/-0.5 +2.5 % 2.3v v in < 2.5v, i out 80 ma 2.5v v in 5.5v, i out 120 ma output current i out 80 120 100 150 ?ma ma 2.3v v in < 2.5v 2.5v v in 5.5v select logic input voltage high v ih 1.4 ? ? v mcp1252-33x50, mcp1253-33x50 selectable output - mcp1252-33x50, mcp1253-33x50: select = gnd, v out = 5.0v supply voltage v in 2.7 ? 5.5 v output voltage accuracy v out -2.5 +/-0.5 +2.5 % 2.7v v in < 3.0v, i out 40 ma 3.0v v in 5.5v, i out 120 ma output current i out 40 120 80 150 ?ma ma 2.7v v in < 3.0v 3.0v v in 5.5v select logic input voltage low v il ? ? 0.4 v mcp1252-33x50, mcp1253-33x50 adjustable output - mcp1252-adj, mcp1253-adj supply voltage v in 2.0 ? 5.5 v output voltage adjustment range v out 1.5 ? 5.5 v v out(max) < 2 x v in fb regulation voltage v fb 1.18 1.21 1.24 v mcp1252-adj, mcp1253-adj all devices supply current i dd ?60120ano load output short-circuit current i sc ?200 ?mav out = gnd, foldback current shutdown current i shdn ? 0.1 2.0 a shdn = 0v power efficiency ?81 68 ?% % v in = 3.0v, v out = 5v v in = 3.6v, v out = 5v i out =120 ma shdn logic input voltage low v il ?? 0.4v shdn logic input voltage high v ih 1.4 ? ? v pgood threshold voltage v th ?0.93v out ?v pgood hysteresis v hys ?0.04v out ?v
mcp1252/3 ds21752a-page 4 ? 2002 microchip technology inc. ac characteristics temperature specifications electrical specifications: unless otherwise specified, all limits are specified for t a = -40c to +85c, v in = 2.7v to 5.5v, select = gnd, shdn = v in , c in = c out = 10 f, c fly = 1 f, i out = 10 ma. typical values are for t a = +25c. parameters sym min typ max units conditions internal oscillator frequency f osc 520 800 650 1000 780 1200 khz khz mcp1252 mcp1253 ripple voltage v rip ?50 45 ?mv p-p mv p-p mcp1252 mcp1253 v out wake-up time from shutdown t wkup ?200 300 ?sec sec select = v in select = gnd v in = 3.6v, i out = 10 ma, shdn = v ih(min) , v out from 0 to 90% nominal regulated output voltage parameters symbol min typ max units conditions temperature ranges: specified temperature range t a -40 ? +85 c maximum operating junction temperature t j ? ? +125 c storage temperature range t a -65 ? +150 c thermal package resistances: thermal resistance, 8 pin msop ja ? 206 ? c/w single-layer semi g42-88 board, natural convection
? 2002 microchip technology inc. ds21752a-page 5 mcp1252/3 2.0 typical performance curves note: unless otherwise indicated, v in = 3.6v, t a = 25c, c in = c out = 10 f, c fly = 1 f, all capacitors x7r ceramic. figure 2-1: output voltage vs. supply voltage (mcp1252-33x50). . figure 2-2: output voltage vs. supply voltage (mcp1252-33x50). figure 2-3: output voltage vs. supply voltage (mcp1252-adj). figure 2-4: percent efficiency vs. supply voltage (mcp1252-33x50). figure 2-5: power efficiency vs. supply voltage (mcp1252-33x50). figure 2-6: power efficiency vs. supply voltage (mcp1252-adj). note: the graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. the performance characteristics listed herein are not tested or guaranteed. in some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 4.99 5.00 5.01 5.02 5.03 5.04 5.05 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) output voltage (v) 10 ma 80 ma 120 ma mcp1252-33x50 select = gnd v out = 5.0v 3.31 3.32 3.33 3.34 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) output voltage (v) 10 ma 80 ma 120 ma mcp1252-33x50 select = v in v out = 3.3v 2.99 3.00 3.01 3.02 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) output voltage (v) 10 ma 80 ma 120 ma mcp1252-adj v out = 3.0v 0 10 20 30 40 50 60 70 80 90 100 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) percent efficiency (%) 10 ma 80 ma 120 ma mcp1252-33x50 select = gnd v out = 5.0v 0 10 20 30 40 50 60 70 80 90 100 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) power efficiency (%) 10 ma 80 ma 120 ma mcp1252-33x50 select = v in v out = 3.3v 0 10 20 30 40 50 60 70 80 90 100 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) power efficiency (%) 10 ma 80 ma 120 ma mcp1252-adj v out = 3.0v
mcp1252/3 ds21752a-page 6 ? 2002 microchip technology inc. note: unless otherwise indicated, v in = 3.6v, t a = 25c, c in = c out = 10 mf, c fly = 1 mf, all capacitors x7r ceramic. figure 2-7: output voltage vs. temperature (mcp1252-33x50, mcp1253-33x50). figure 2-8: output voltage vs. temperature (mcp1252-33x50, mcp1253-33x50). figure 2-9: line transient response. figure 2-10: quiescent current vs. temperature (mcp1253-33x50). figure 2-11: quiescent current vs. temperature (mcp1252-33x50). figure 2-12: load transient response. 4.98 4.99 5.00 5.01 5.02 5.03 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature (c) output voltage (v) mcp1252-33x50 mcp1253-33x50 select = gnd v out = 5.0v i out = 120 ma 3.28 3.29 3.30 3.31 3.32 3.33 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature (c) output voltage (v) mcp1252-33x50 mcp1253-33x50 select = v in v out = 3.3v i out = 120 ma 40 45 50 55 60 65 70 75 80 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature (c) supply current (ua) mcp1253-33x50 select = gnd v out = 5.0v, i out = 0 ma v in = 5.5v v in = 3.6v v in = 2.7v v in = 2.3v 40 45 50 55 60 65 70 75 80 -40 -25 -10 5 20 35 50 65 80 95 110 125 temperature (c) supply current (ua) v in = 5.5v v in = 3.6v v in = 2.7v v in = 2.3v mcp1252-33x50 select = gnd v out = 5.0v, i out = 0 ma
? 2002 microchip technology inc. ds21752a-page 7 mcp1252/3 note: unless otherwise indicated, v in = 3.6v, t a = 25c, c in = c out = 10mf, c fly = 1mf, all capacitors x7r ceramic. figure 2-13: output voltage ripple vs. supply voltage (mcp1252-33x50). figure 2-14: output voltage ripple vs. supply voltage (mcp1252-33x50). figure 2-15: start-up (mcp1252-33x50). figure 2-16: output voltage ripple vs. time. figure 2-17: output voltage ripple vs. time. figure 2-18: start-up (mcp1253-33x50). 0 10 20 30 40 50 60 70 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) output voltage ripple (mv) 10 ma 80 ma 120 ma mcp1252-33x50 select = gnd v out = 5.0v 0 10 20 30 40 50 60 70 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 supply voltage (v) output voltage ripple (mv) 10 ma 80 ma 120 ma mcp1252-33x50 select = v in v out = 3.3v
mcp1252/3 ds21752a-page 8 ? 2002 microchip technology inc. 3.0 pin functions table 3-1: pin function table 3.1 open-drain power good output (pgood) pgood is a high-impedance when the output voltage is in regulation. a logic-low is asserted when the output falls 7% (typical) below the nominal value. the pgood output remains low until v out is within 3% (typical) of its nominal value. on start-up, this pin indicates when the output voltage reaches its final value. pgood is high-impedance when shdn is low. 3.2 regulated output voltage (v out ) bypass to gnd with a filter capacitor. 3.3 power supply input (v in ) it is recommended that v in be tied to a ceramic bypass capacitor. 3.4 ground (gnd) it is recommended that the ground pin be tied to a ground plane for best performance. 3.5 flying capacitor negative terminal (c-) the charge pump capacitor (flying capacitor) is used to transfer charge from the input supply to the regulated output. it is recommended that a low esr (equivalent series resistance) capacitor be used. 3.6 flying capacitor positive terminal (c+) the charge pump capacitor (flying capacitor) is used to transfer charge from the input supply to the regulated output. proper orientation is imperative when using a polarized capacitor. 3.7 shutdown input (shdn ) a logic-low signal applied to shdn disables the device. a logic-high signal applied to this pin allows normal operation. 3.8 select (select) input or feedback (fb) input mcp1252-33x50, mcp1253-33x50: select : select input pin. connect select to v in for 3.3v fixed output. connect select to gnd for a 5.0v fixed output. mcp1252-adj, mcp1253-adj: fb : feedback pin. a resistor divider connected to this pin determines the adjustable v out value (1.5v to 5.5v). pin no. name function 1 pgood open-drain power good output 2v out regulated output voltage 3v in power supply input 4gnd ground terminal 5c- flying capacitor negative terminal 6c+ flying capacitor positive terminal 7 shdn shutdown mode, active-low input 8 select output voltage select pin. (mcp1252-33x50, mcp1253-33x50) fb feedback input pin for adjustable output (mcp1252-adj, mcp1253-adj)
? 2002 microchip technology inc. ds21752a-page 9 mcp1252/3 4.0 device overview 4.1 theory of operation the mcp1252 and mcp1253 family of devices employ a switched capacitor charge pump to buck or boost an input supply voltage (v in ) to a regulated output voltage. referring to the functional block diagram and figure 4-1, the devices perform conversion and regula- tion in three phases. when the devices are not in shut- down mode and a steady-state condition has been reached, the three phases are continuously cycled through. the first phase transfers charge from the input to the flying capacitor (c fly ) connected to pins c+ and c-. this phase always occurs for half of the internal oscillator period. during this phase, switches s 1 and s 2 are closed. once the first phase is complete, all switches are opened and the second phase (idle phase) is entered. the device compares the internal or external feedback voltage with an internal reference. if the feedback volt- age is below the regulation point, the device transitions to the third phase. the third phase transfers energy from the flying capac- itor to the output capacitor connected to v out and the load. if regulation is maintained, the device returns to the idle phase. if the charge transfer occurs for half the internal oscillator period, more charge is needed in the flying capacitor and the device transitions back to the first phase. the regulation control is hysteretic, otherwise referred to as a bang-bang control. the output is regulated around a fixed reference with some hysteresis. as a result, typically 50 mv of peak-to-peak ripple will be observed at the output independent of load current. the frequency of the output ripple, however, will be influenced heavily by the load current and output capacitance. the maximum frequency that will be observed is equal to the internal oscillator frequency. the devices automatically transition between buck or boost operation. this provides a low-cost, compact and simple solution for step-down/step-up dc/dc conver- sion. this is especially true for battery-operated appli- cations that require a fixed output above or below the input. figure 4-1: flow algorithm. start phase 1: charge transfer from v in to c fly phase 2: idle state v fb > v ref phase 3: charge transfer from c fly to c out no ye s no yes yes no no ye s v fb > v ref t 1 = 2f osc 1 t 3 = 2f osc 1
mcp1252/3 ds21752a-page 10 ? 2002 microchip technology inc. 4.2 power efficiency the power efficiency, , is determined by the mode of operation. in boost mode, the efficiency is approxi- mately half of a linear regulator. in buck mode, the effi- ciency is approximately equal to that of a linear regulator. the following formulas can be used to approximate the power efficiency with any significant amount of output current. at light loads, the quiescent current of the device must be taken into consideration. equation 4.3 shutdown mode driving shdn low places the mcp1252 or mcp1253 in a low power shutdown mode. this disables the charge pump switches, oscillator and control logic, reducing the quiescent current to 0.1 a (typical). the pgood output is in a high-impedance state during shutdown. 4.4 pgood output the pgood output is an open-drain output that sinks current when the regulator output voltage falls below 0.93v out (typical). the output voltage can either be fixed when the selectable output device is chosen (mcp1252-33x50, mcp1253-33x50) or adjustable from an external resistive divider when the adjustable device is chosen (mcp1252-adj, mcp1253-adj). if the regulator output voltage falls below 0.93v out (typ- ical) for less than 200 sec and then recovers, glitch- immunity circuits prevent the pgood signal from tran- sitioning low. a 10 k ? to 1 m ? pull-up resistor from pgood to v out may be used to provide a logic output. connect pgood to gnd or leave unconnected if not used. 4.5 soft-start and short-circuit protection the mcp1252 and mcp1253 features foldback short- circuit protection. this circuitry provides an internal soft-start function by limiting in-rush current during startup and also limits the output current to 200 ma (typical) if the output is shorted to gnd. the internal soft-start circuitry requires approximately 300 sec, typical with a 5v output, from either initial power-up or release from shutdown for the output voltage to be in regulation. 4.6 thermal shutdown the mcp1252 and mcp1253 feature thermal shut- down with temperature hysteresis. when the die tem- perature exceeds 160c, typically, the device shuts down. when the die cools by 15c, typically, the device automatically turns back on. if high die temperature is caused by output overload and the load is not removed, the device will turn on and off, resulting in a pulse out- put. 5.0 applications the mcp1252 and mcp1253 are inductorless, positive regulated, charge pump dc/dc converters. a typical circuit configuration for the fixed output version is depicted in figure 5-1. the adjustable version is depicted in figure 5-2. figure 5-1: typical circuit configuration for fixed output device. figure 5-2: typical circuit configuration for adjustable output device. boost p out p in ------------- v out i out v in 2 i out ------------------------------------ v out v in 2 ----------------- - == = buck p out p in ------------- v out i out v in i out ------------------------------- - v out v in ------------- == = mcp1252-33x50 c+ c fly 6 5 c- v in shdn 3 7 off on shutdown control + 2.7v to 5.5v c in gnd select pgood v out 8 1 2 + c out r pu pgood flag to p ic m ic ro ? +5.0v 2.5% selectable output voltage 4 c fly = 1f c in = 10 f c out = 10 f microcontroller r pu = 100 k ? mcp1252-adj c+ c fly 6 5 c- v in shdn 3 7 off on shutdown control + 2.7v to 5.5v c in gnd fb pgood v out 8 1 2 + c out r pu pgood flag to pic m ic ro ? +4.0v adjustable output voltage r 2 r 1 4 v out = 1.21v (1 + r 1 /r 2 ) microcontroller c fly = 1f c in = 10 f c out = 10 f r pu = 100 k ? r 1 = 23.2 k ? r 2 = 10 k ? +
? 2002 microchip technology inc. ds21752a-page 11 mcp1252/3 5.1 capacitor selection the style and value of capacitors used with the mcp1252 and mcp1253 family of devices determine several important parameters such as output voltage ripple and charge pump strength. to minimize noise and ripple, it is recommended that low esr (0.1 ? ) capacitors be used for both c in and c out . these capacitors should be either ceramic or tantalum and should be 10 f or higher. aluminum capacitors are not recommended because of their high esr. if the source impedance to v in is very low, up to several megahertz, c in may not be required. alternatively, a somewhat smaller value of c in may be substituted for the recommended 10 f, but will not be as effective in preventing ripple on the v in pin. the value of c out controls the amount of output volt- age ripple present on v out . increasing the size of c out will reduce output ripple at the ex pense of a slower turn-on time from shutdown and a higher in-rush current. the flying capacitor (c fly ) controls the strength of the charge pump. in order to achieve the maximum rated output current (120 ma), it is necessary to have at least 1 f of capacitance for the flying capacitor. a smaller flying capacitor delivers less charge per clock cycle to the output capacitor, resulting in lower output ripple. the output ripple is reduced at the expense of maxi- mum output current and efficiency. 5.2 output voltage setting the mcp1252-33x50 and mcp1253-33x50 feedback controllers select between an internally-set, regulated output voltage (3.3v or 5.0v). connect select to gnd for a regulated 5.0v output and connect select to v in for a regulated 3.3v output. the mcp1252-adj and mcp1253-adj utilize an external resistor divider that allows the output voltage to be adjusted between 1.5v and 5.5v. for an adjust- able output, connect a resistor between v out and fb (r 1 ) and another resistor between fb and gnd (r 2 ). in the following equation, choose r 2 to be less than or equal to 30 k ? and calculate r 1 from the following formula: equation and equation note that the tolerance of the external resistors will have an effect on the accuracy of the output voltage. for optimum results, it is recommended that the external resistors have a tolerance no larger than 1%. 5.3 recommended layout the mcp1252 and mcp1253 family of devices transfer charge at high switching frequencies, producing fast, high peak, transient currents. as a result, any stray inductance in the component layout will pr oduce unwanted noise in the system. proper board layout techniques are required to ensure optimum perfor- mance. figure 5-3 depicts the recommended board layout. the input capacitor connected between v in and gnd, and the output capacitor connected between v out and gnd, are 10 f ceramic, x7r dielectric, in 1206 packages. the flying capacitor connected between c+ and c- is a 1 f ceramic, x7r dielectric in a 0805 package. the layout is scaled 3:1. figure 5-3: recommended printed circuit board layout. r 1 r 2 v out v fb ? () 1 ? [] = v out v fb 1r 1 r 2 ? + () = where: v out is the desired output voltage from 1.5v to 5.5v v fb is the internal regulation voltage, nominally 1.21v pgood v out gnd v in c+ c- shdn select
mcp1252/3 ds21752a-page 12 ? 2002 microchip technology inc. 6.0 typical application circuits + - gnd c+ c- v in v out shdn 78 2 3 mcp1252-33x50 10 f 10 f single li-ion cell pgood 4 select 1 100 k ? 1f 56 5v mcp1252-adj white led bias 59 ? 59 ? 59 ? 59 ? 59 ? 59 ? pwm contrast control alternative white led bias up to 6 white leds 24 k ? 10 k ? single cell lithium-ion battery to 5v converter + - gnd c+ c- v in v out shdn 78 2 3 10 f 10 f single li-ion cell pgood 4 select 1 100 k ? 1f 56 mcp1252-adj 10 ? 10 ? 10 ? 10 ? 10 ? 10 ? pwm contrast control up to 6 white leds + - gnd c+ c- v in v out shdn 78 2 3 10 f 10 f single li-ion cell pgood 4 select 1 100 k ? 1f 56
? 2002 microchip technology inc. ds21752a-page 13 mcp1252/3 7.0 packaging information 7.1 package marking legend: xx...x customer specific information* yy year code (last 2 digits of calendar year) ww week code (week of january 1 is week ?01?) nnn alphanumeric traceability code note : in the event the full microchip part number cannot be marked on one line, it will be carried over to the next line thus limiting the number of available characters for customer specific information. * standard otp marking consists of microchip part number, year code, week code, and traceability code. 8-lead msop (fixed) example: xxxxx ywwnnn 1252sx 233025 8-lead msop (adjustable) example: xxxxx ywwnnn 1253dj 233025
mcp1252/3 ds21752a-page 14 ? 2002 microchip technology inc. 8-lead plastic micro small outline package (ms) (msop) d l c dimensions d and e1 do not include mold flash or protrusions. mold flash or protrusions shall not .037 .035 f footprint (reference) exceed .010" (0.254mm) per side. notes: drawing no. c04-111 *controlling parameter mold draft angle top mold draft angle bottom foot angle lead width lead thickness c b 7 7 .004 .010 0 .006 .012 (f) dimension limits overall height molded package thickness molded package width overall length foot length standoff overall width number of pins pitch a l e1 d a1 e a2 .016 .114 .114 .022 .118 .118 .002 .030 .193 .034 min p n units .026 nom 8 inches 1.00 0.95 0.90 .039 0.15 0.30 .008 .016 6 0.10 0.25 0 7 7 0.20 0.40 6 millimeters* 0.65 0.86 3.00 3.00 0.55 4.90 .044 .122 .028 .122 .038 .006 0.40 2.90 2.90 0.05 0.76 min max nom 1.18 0.70 3.10 3.10 0.15 0.97 max 8 e1 e b n 1 2 significant characteristic .184 .200 4.67 .5.08 p a a1 a2
? 2002 microchip technology inc. ds21752a-page15 mcp1252/3 product identification system to order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office . sales and support part no. x /xx package temperature range device device: mcp1252: low noise, positive-regulated charge pump mcp1252t: low noise, positive-regulated charge pump (tape and reel) mcp1253: low noise, positive-regulated charge pump mcp1253t: low noise, positive-regulated charge pump (tape and reel) temperature range: i = -40c to +85c package: ms = plastic micro small outline (msop), 8-lead examples: a) mcp1252-33x50i/ms: low noise, positive- regulated charge pump, fixed output b) mcp1252-adji/ms: low noise, positive- regulated charge pump, adjustable output c) mcp1252t-33x50i/ms: tape and reel, low noise, positive-regulated charge pump, fixed output a) mcp1253-33x50i/ms: low noise, posi- tive-regulated charge pump, fixed output b) mcp1253-adji/ms: low noise, posi- tive-regulated charge pump, adjustable output c) mcp1253t-adji/ms: tape and reel, low noise, positive-regulated charge pump, adjustable output data sheets products supported by a preliminary data sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. to determine if an errata sheet exists for a particular device, please contact one of the following: 1. your local microchip sales office 2. the microchip corporate literature center u.s. fax: (480) 792-7277 3. the microchip worldwide site (www.microchip.com) please specify which device, revision of silicon and data sheet (include literature #) you are using. new customer notification system register on our web site (www.microchip.com/cn) to receive the most current information on our products.
mcp1252/3 ds21752a-page 16 ? 2002 microchip technology inc. notes:
? 2002 microchip technology inc. ds21752a - page 17 information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. no representation or warranty is given and no liability is assumed by microchip technology incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. use of microchip?s products as critical com- ponents in life support systems is not authorized except with express written approval by microchip. no licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. trademarks the microchip name and logo, the microchip logo, k ee l oq , mplab, pic, picmicro, picstart and pro mate are registered trademarks of microchip technology incorporated in the u.s.a. and other countries. filterlab, micro id , mxdev, mxlab, picmaster, seeval and the embedded control solutions company are registered trademarks of microchip technology incorporated in the u.s.a. dspic, dspicdem.net, economonitor, fansense, flexrom, fuzzylab, in-circuit serial programming, icsp, icepic, microport, migratable memory, mpasm, mplib, mplink, mpsim, picc, picdem, picdem.net, rfpic, select mode and total endurance are trademarks of microchip technology incorporated in the u.s.a. and other countries. serialized quick turn programming (sqtp) is a service mark of microchip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2002, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. microchip received qs-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona in july 1999 and mountain view, california in march 2002. the company?s quality system processes and procedures are qs-9000 compliant for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms, microperipherals, non-volatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001 certified. note the following details of the code protection feature on microchip devices: ? microchip products meet the specification contained in their particular microchip data sheet. ? microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal methods used to breach the code protection feature. all of these methods, to our know l- edge, require using the microchip products in a manner outside the operating specifications contained in microchip's data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconductor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are committed to continuously improving the code protection features of our products.
ds21752a-page 18 ? 2002 microchip technology inc. m americas corporate office 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7200 fax: 480-792-7277 technical support: 480-792-7627 web address: http://www.microchip.com rocky mountain 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7966 fax: 480-792-4338 atlanta 3780 mansell road, suite 130 alpharetta, ga 30022 tel: 770-640-0034 fax: 770-640-0307 boston 2 lan drive, suite 120 westford, ma 01886 tel: 978-692-3848 fax: 978-692-3821 chicago 333 pierce road, suite 180 itasca, il 60143 tel: 630-285-0071 fax: 630-285-0075 dallas 4570 westgrove drive, suite 160 addison, tx 75001 tel: 972-818-7423 fax: 972-818-2924 detroit tri-atria office building 32255 northwestern highway, suite 190 farmington hills, mi 48334 tel: 248-538-2250 fax: 248-538-2260 kokomo 2767 s. albright road kokomo, indiana 46902 tel: 765-864-8360 fax: 765-864-8387 los angeles 18201 von karman, suite 1090 irvine, ca 92612 tel: 949-263-1888 fax: 949-263-1338 san jose microchip technology inc. 2107 north first street, suite 590 san jose, ca 95131 tel: 408-436-7950 fax: 408-436-7955 toronto 6285 northam drive, suite 108 mississauga, ontario l4v 1x5, canada tel: 905-673-0699 fax: 905-673-6509 asia/pacific australia microchip technology australia pty ltd suite 22, 41 rawson street epping 2121, nsw australia tel: 61-2-9868-6733 fax: 61-2-9868-6755 china - beijing microchip technology consulting (shanghai) co., ltd., beijing liaison office unit 915 bei hai wan tai bldg. no. 6 chaoyangmen beidajie beijing, 100027, no. china tel: 86-10-85282100 fax: 86-10-85282104 china - chengdu microchip technology consulting (shanghai) co., ltd., chengdu liaison office rm. 2401-2402, 24th floor, ming xing financial tower no. 88 tidu street chengdu 610016, china tel: 86-28-86766200 fax: 86-28-86766599 china - fuzhou microchip technology consulting (shanghai) co., ltd., fuzhou liaison office unit 28f, world trade plaza no. 71 wusi road fuzhou 350001, china tel: 86-591-7503506 fax: 86-591-7503521 china - shanghai microchip technology consulting (shanghai) co., ltd. room 701, bldg. b far east international plaza no. 317 xian xia road shanghai, 200051 tel: 86-21-6275-5700 fax: 86-21-6275-5060 china - shenzhen microchip technology consulting (shanghai) co., ltd., shenzhen liaison office rm. 15-16, 13/f, shenzhen kerry centre, renminnan lu shenzhen 518001, china tel: 86-755-82350361 fax: 86-755-82366086 china - hong kong sar microchip technology hongkong ltd. unit 901-6, tower 2, metroplaza 223 hing fong road kwai fong, n.t., hong kong tel: 852-2401-1200 fax: 852-2401-3431 india microchip technology inc. india liaison office divyasree chambers 1 floor, wing a (a3/a4) no. 11, o?shaugnessey road bangalore, 560 025, india tel: 91-80-2290061 fax: 91-80-2290062 japan microchip technology japan k.k. benex s-1 6f 3-18-20, shinyokohama kohoku-ku, yokohama-shi kanagawa, 222-0033, japan tel: 81-45-471- 6166 fax: 81-45-471-6122 korea microchip technology korea 168-1, youngbo bldg. 3 floor samsung-dong, kangnam-ku seoul, korea 135-882 tel: 82-2-554-7200 fax: 82-2-558-5934 singapore microchip technology singapore pte ltd. 200 middle road #07-02 prime centre singapore, 188980 tel: 65-6334-8870 fax: 65-6334-8850 ta iw a n microchip technology (barbados) inc., taiwan branch 11f-3, no. 207 tung hua north road taipei, 105, taiwan tel: 886-2-2717-7175 fax: 886-2-2545-0139 europe austria microchip technology austria gmbh durisolstrasse 2 a-4600 wels austria tel: 43-7242-2244-399 fax: 43-7242-2244-393 denmark microchip technology nordic aps regus business centre lautrup hoj 1-3 ballerup dk-2750 denmark tel: 45 4420 9895 fax: 45 4420 9910 france microchip technology sarl parc d?activite du moulin de massy 43 rue du saule trapu batiment a - ler etage 91300 massy, france tel: 33-1-69-53-63-20 fax: 33-1-69-30-90-79 germany microchip technology gmbh steinheilstrasse 10 d-85737 ismaning, germany tel: 49-89-627-144 0 fax: 49-89-627-144-44 italy microchip technology srl centro direzionale colleoni palazzo taurus 1 v. le colleoni 1 20041 agrate brianza milan, italy tel: 39-039-65791-1 fax: 39-039-6899883 united kingdom microchip ltd. 505 eskdale road winnersh triangle wokingham berkshire, england rg41 5tu tel: 44 118 921 5869 fax: 44-118 921-5820 11/15/02 w orldwide s ales and s ervice

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