View AP1601_1570896.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AP1601 step-up dc/dc converter AP1601 rev. 5 1 of 12 september 2009 www.diodes.com ? diodes incorporated ? a guaranteed start-up from less than 0.9 v. ? high efficiency. ? low quiescent current. ? less number of external components needed. ? low ripple and low noise. ? space saving packages: msop-8l and msop-10l. ? msop-8l and msop-10l: available in ?green? molding compound (no br, sb) ? lead free finish / rohs compliant (note 1) the AP1601 is a high efficiency step-up dc/dc converter for applications using 1 to 4 nimh battery cells. only three external components are required to deliver a fixed output voltage of 3.3v or 5v. the AP1601 starts up from less than 0.9v input with 1ma load. pulse frequency modulation scheme brings optimized performance for applications with light output loading and low input voltages. the output ripple and noise are lower compared with the circuits operating in psm mode. the pfm control circuit operating in 100khz (max.) switching rate results in smaller passive components. the space saving msop packages make the AP1601 an ideal choice of dc/dc converter for space conscious applications, like pagers, electronic cameras, and wireless microphones. ? pagers ? cameras ? wireless microphones ? pocket organizers ? battery backup suppliers ? portable instruments typical applicat ion circuit shdn lbo lx out fb ref lbi gnd 0.1uf low- battery detect out 22uh 220uf + 100uf + v in on off adj output (1.8v to 4.0v) up to 300 ma low- battery detect in r5 r6 vout=1.2 (1+ ) r6 r5 r6 suggest 100k~200k fb=vout, vout=3.3v fb=gnd, vout=5v features general description applications
AP1601 step-up dc/dc converter AP1601 rev. 5 2 of 12 september 2009 www.diodes.com ? diodes incorporated ordering information AP1601 xxx g - 13 packing package green m8 : msop-8l 13 : tape & reel m10 : msop-10l g : green device package code packaging (note 2) 13? tape and reel quantity part number suffix AP1601m8g-13 m8 msop-8l 2500/tape & reel -13 AP1601m10g-13 m10 msop-10l 2500/tape & reel -13 notes: 1. eu directive 2002/95/ec (rohs). all applicable rohs exemptions applied. please visit our website at http://www.diodes.com/products/lead_free.html . 2. pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. pin assignment 1 3 2 4 8 6 7 5 msop-8l fb lbi ref out lx gnd lbo shdn ( top view ) 1 3 2 10 8 9 msop-10l fb lbi out lx gnd 47 clsel 56 ref batt shdn lbo ( top view )
AP1601 step-up dc/dc converter AP1601 rev. 5 3 of 12 september 2009 www.diodes.com ? diodes incorporated pin descriptions pin name description fb use a resistor network to set the output voltage from +2.0v to +5.5v. if fb=v out , v out t=3.3v fix voltage fb=gnd, v out =5v fix voltage lbi low-battery comparator input. in ternally set to trip at +1.30v. lbo open-drain low-battery comparator output. connect lbo to out through a 100k ? resistor. output is low when v lbi is <1.2v. lbo is high impedance during shutdown. ref 1.2v reference voltage. bypass with a 0.1 f capacitor. out power output. out provides bootstrap power to the ic. lx n-channel and p-channel power mosfet drain gnd ground shdn shutdown input. drive high (>80% of v out ) for operating mode. drive low (<20% of v out ) for shutdown mode. connect to out for normal operation. clsel current-limit select input. clsel = out sets the current limit to 0.8a. clsel = gnd sets the current limit to 0.4a. batt battery input and damping switch connection. if damping switch is unused, leave batt unconnected. functional bloc k diagram + - + - + - s q r f/f trig one-shot q one-shot q trig maximum on-time one-shot error amplifier current-limit amplifier low-battery comparator reference zero crossing amplifier minimum off-time one-shot lbo lbi + - + - damping switch out lx gnd batt fb ref 0.1uf 22uh r1 200 r5 r6 0.1uf + 47uf + 47uf + shdn clsel v out r2 100k v in r3 r4 p n v in en ?
AP1601 step-up dc/dc converter AP1601 rev. 5 4 of 12 september 2009 www.diodes.com ? diodes incorporated absolute maxi mum ratings symbol parameter rating unit esd hbm human body model esd protection 2 kv esd mm machine model esd protection 200 v v cc supply voltage (out to gnd) -0.3 to 8.0 v v batt battery voltage (batt to gnd) -0.3 to 6.0 v lbi, ref, fb, clsel to gnd -0.3 to v out +0.3 v v sw switch voltage (lx to gnd) -0.3 to v out +0.3 v i out output current (out) -1.5 to +1.5 a v lbo lbo to gnd 6.0 v i sw switch current (lx) -1.5 to +1.5 a t j operation junction temperature range -40 to +125 o c t st storage temperature range -65 to +150 o c recommended oper ating conditions symbol parameter min max unit v in input voltage 1.1 5.5 v i out output current - 1.2 a t a operating ambient temperature -40 +85 oc
AP1601 step-up dc/dc converter AP1601 rev. 5 5 of 12 september 2009 www.diodes.com ? diodes incorporated electrical characteristics (v batt = 2v, fb = out (v out = 3.3v), r l = , t a = 0c to +85c, unless otherwise noted. typical values are at t a = +25c.) symbol parameter conditions min typ. max unit minimum input volta g e - 0.9 - v v in operating voltage t a = +25c 1.1 - 5.5 v start-up voltage t a = +25c, rl = 3k ? (note 3) - 0.9 1.1 v start-up voltage temperature - -2 - mv/c output voltage range 2 - 5.5 v i out steady-state output current (note 4) (v out = 3.3v) AP1601 (clsel=out) 300 420 - ma AP1601 (clsel=gnd) 150 220 - (v out = 5v) AP1601 (clsel=out) 180 285 - AP1601 (clsel=gnd) 90 130 - v ref reference voltage i ref =0 1.176 1.2 1.224 v tempco reference voltage temperature - 0.024 - mv/c v ref_load reference voltage load regulation i ref =0 to 20 a - 30 80 mv v ref_line reference voltage line regulation v out =2v to 5.5v - 0.08 2.5 mv/v fb, lb1 input threshold 1.176 1.2 1.224 v r ds(on) internal nfet, pfet on-resistance i lx =100ma - 0.3 0.6 ? i lim lx switch current limit (nfet) AP1601 msop-8l 0.80 1 1.20 a AP1601 msop-10l (clsel=out) 0.80 1 1.20 AP1601 msop-10l (clsel=gnd) 0.40 0.50 0.65 i leak lx leakage current i lx =0, 5.5v; v out =5.5v - 0.05 1 a ja thermal resistance junction-to-ambient msop-8l (note 5) 118 o c/w msop-10l (note 5) 88 jc t hermal resistance junction-to-case msop-8l (note 5) 30 o c/w msop-10l (note 5) 16 notes: 3. start-up voltage operation is guaranteed with the addition of a schottky b0520lw external diode between the input and output. 4. steady-state output current indicates that the device maintains output voltage regulation under load. 5. test condition for msop-8l and msop-10l: devices mounted on 2oz copper, with minimum recommended pad layout on top and bo ttom layer with thermal vias, double side fr-4 pcb.
AP1601 step-up dc/dc converter AP1601 rev. 5 6 of 12 september 2009 www.diodes.com ? diodes incorporated electrical characteristics (continued) (v batt = 2v, r l = , t a = 0c to +85c , unless otherwise noted. typical values are at t a = +25c .) symbol parameter conditions min typ. max unit operating current into out v fb =1.4v, v out =3.3v - 16 35 a shutdown current into out shdn =gnd - 0.1 1 a efficiency v out =3.3v, i load =200ma - 90 - % v out =2v, i load =1ma - 85 - t on lx switch on-time v fb =1v, v out =3.3v 3 4 7 s t off lx switch off-time v fb =1v, v out =3.3v 0.8 1 1.2 s i fb fb input current v fb =1.4v - 0.03 50 na i lbi lbi input current l lbi =1.4v - 1 50 na i clsel clsel input current AP1601, clsel=out - 1.4 3 a i shdn shdn input current v shdn =0 or v out - 0.07 50 na lbo low output voltage l lbi =0, i sink =1ma - 0.2 0.4 v i lbo lbo off leakage current v lbo =5.5v, l lbi =5.5v - 0.07 1 a damping switch resistance AP1601, v batt =2v - 88 150 ? v il shdn input voltage - - 0.2 v out v v ih 0.8 v out - - v il clsel input voltage - - 0.2 v out v v ih 0.8 v out - -
AP1601 step-up dc/dc converter AP1601 rev. 5 7 of 12 september 2009 www.diodes.com ? diodes incorporated typical perform ance characteristics reference output voltage v.s. temperature 1.14 1.15 1.16 1.17 1.18 1.19 1.2 1.21 -40 -20 0 20 40 60 80 100 temperature (c) reference output voltage (v) maximum output current v.s. input voltage (v out =3.3v) 0 100 200 300 400 500 600 1 1.21.41.61.8 2 2.22.42.62.8 3 input voltage (v) maximum output current (ma) start-up voltage v.s. load current 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 0.01 0.1 1 10 100 load current (ma) start-up voltage (v) without diode with diode no-load battery current v.s. input battery voltage 0 20 40 60 80 100 120 140 160 0.511.522.53 input battery voltage (v) input battery current (ua)
AP1601 step-up dc/dc converter AP1601 rev. 5 8 of 12 september 2009 www.diodes.com ? diodes incorporated typical performance characteristics (continued) efficiency vs. load current 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 load current (ma) efficiency (%) vin=1.2v vin=2.4v shutdown current v.s. supply voltage -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 1234 supply voltage (v) shutdown current (ua) shutdown threshold voltage v.s. supply voltage 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 11.522.533.54 supply voltage (v) shutdown threshold voltage (v)
AP1601 step-up dc/dc converter AP1601 rev. 5 9 of 12 february 2009 www.diodes.com ? diodes incorporated functional description general description AP1601 pfm (pulse frequency modulation) converter ic series combine a switch mode converter, n-channel power mosfet, precision voltage reference, and voltage detector in a single monolithic device. they offer both extreme low quiescent current, high efficiency, and very low gate threshold voltage to ensure start-up with low battery voltage (0.9v typ.). designed to maximize battery life in portable products, and minimize switching losses by only switching as needed service the load. pfm converters transfer a discrete amount of energy per cycle and regulate the output voltage by modulating switching frequency with the constant turn-on time. switching frequency depends on load, input voltage, and inductor value, and it can range up to 100khz. the sw on resistance is typically 1 to 1.5w to minimize switch losses. when the output voltage drops, the error comparator enables 100khz oscillator that turns on the mosfet around 7.5us and 2.5ms off time. turning on the mosfet allows inductor current to ramp up, storing energy in a magnetic field and when mosfet turns off that force inductor current through diode to the output capacitor and load. as the stored energy is depleted, the current ramp down until the diode turns off. at this point, inductor may ring due to residual energy and stray capacitance. the output capacitor stores charge when current flowing through the diode is high, and release it when current is low, thereby maintaining a steady voltage across the load. as the load increases, the output capacitor discharges faster and the error comparator initiates cycles sooner, increasing the switching frequency. the maximum duty cycle ensure adequate time for energy transfer to output during the second half each cycle. depending on circuit, pfm converter can operate in either discontinuous mode or continuous conduction mode. continuous conduction mode means that the inductor current does not ramp to zero during each cycle. diode selection speed, forward drop, and leakage current are the three main considerations in selecting a rectifier diode. best performance is obtained with schottky rectifier diode, such as 1n5819. motorola makes b0520lw in surface mount. for lower output power a 1n4148 can be used although efficiency and start up voltage will suffer substantially. inductor selection to operate as an efficient energy transfer element, the inductor must fulfill three requirements. first, the inductance must be low enough for the inductor to store adequate energy under the worst case condition of minimum input voltage and switch on time. second, the inductance must also be high enough so maximum current rating of AP1601 and inductor are not exceed at the other worst case condition of maximum input voltage and on time. lastly, the inductor must have sufficiently low dc resistance so excessive power is not lost as heat in the windings. but unfortunately this is inversely related to physical size. minimum and maximum input voltage, output voltage and output current must be established before and inductor can be selected. capacitor selection a poor choice for a output capacitor can result in poor efficiency and high output ripple. ordinary aluminum electrolyzers, while inexpensive may have unacceptably poor esr and esl. there are low esr aluminum capacitors for switch mode dc-dc converters which work much better than general propose unit. tantalum capacitors provide still better performance at more expensive. os-con capacitors have extremely low esr in a small size. if capacitance is reduced, output ripple will increase. most of the input supply is supplied by the input bypass capacitor. the capacitor voltage rating should be at least 1.25 times greater than a maximum input voltage.
AP1601 step-up dc/dc converter AP1601 rev. 5 10 of 12 september 2009 www.diodes.com ? diodes incorporated marking information (1) msop-8l AP1601 ( top view ) y w x part number logo y : year : 0~9 a~z : green 87 65 1 234 a~z : 27~52 week; z represents w : week : a~z : 1~26 week; 52 and 53 week (2) msop-10l AP1601 ( top view ) y w x part number logo 9876 1 245 10 3 y : year : 0~9 a~z : green a~z : 27~52 week; z represents w : week : a~z : 1~26 week; 52 and 53 week
AP1601 step-up dc/dc converter AP1601 rev. 5 11 of 12 september 2009 www.diodes.com ? diodes incorporated package information (all dimensions in mm) (1) package type: msop-8l 2.9/3.1 0.75/0.95 0/0.15 2.9/3.1 4.7/5.1 0.65bsc. 0.22/0.38 0.05 0.15typ. 0.4/0.8 0.25 0.95ref. gauge plane 0 / 8 "a" detail "a" 1 6x-0.65 land pattern recommendation (unit:mm) 8x-1.4 4.4 8x-0.45 0.05/0.15 (2) package type: msop-10l 2.95/3.05 0.75/0.95 0.05/0.15 2.95/3.05 4.8/5.0 0.17/0.27 0.10 0.1/0.2 0.4/0.7 0.25 gauge plane 0 / 8 "a" detail "a" 1.10max. seting plane 0.5typ. c c 10x-0.30 8x-0.50 10x-1.4 land pattern recommendation (unit:mm) 1 1 1 4.4
AP1601 step-up dc/dc converter AP1601 rev. 5 12 of 12 september 2009 www.diodes.com ? diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2009, diodes incorporated www.diodes.com

▲Up To Search▲

Price & Availability of AP1601

	To Download AP1601 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .