mic2560 pcmcia card socket v cc and v pp switching matrix micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? te l +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micre l.com september 2006 1 m9999-092106 general description the mic2560 v cc and v pp matrix controls pcmcia (per- sonal computer memory card international association) memory card power supply pins, both v cc and v pp . the mic2560 switches voltages from the system power supply to v cc and v pp . the mic2560 switches between the three v cc voltages (off, 3.3v and 5.0v) and the v pp voltages (off, 0v, 3.3v, 5v, or 12.0v) required by pcmcia cards. output voltage is selected by two digital inputs for each output and output current ranges up to 1a for v cc and 200ma for v pp . the mic2560 provides pow er management capability under the control of the pc card controller and features over current and thermal protec tion of the power outputs, zero current ?sleep? mode, suspend mode, low power dynamic mode, and on-off cont rol of the pcmcia socket power. the mic2560 is designed for efficient operation. in stand- by (sleep) mode the device draws very little quiescent current, typically 0.01a. the device and pcmcia ports are protected by current lim iting and overtemperature shutdown. full cross-conduction lockout protects the system power supply. data sheets and support doc umentation can be found on micrel?s web site at www.micrel.com. features ? complete pcmcia vcc a nd vpp switch matrix in a single ic ? no external components required ? logic compatible with industry standard pcmcia controllers ? no voltage overshoot or switching transients ? break-before-make switching ? output current limit and overtemperature shutdown ? digital flag for error condition indication ? ultra-low power consumption ? digital selection of vcc and vpp voltages ? over 1a vcc output current ? 200ma vpp (12v) output current ? options for direct compat ibility with industry standard pcmcia controllers ? 16-pin soic package applications ? pcmcia power supply pin voltage switch ? font cards for printers and scanners ? data-collection systems ? machine control data input systems ? wireless communications ? bar code data collection systems ? instrumentation conf iguration/data-logging ? docking stations (portable and desktop) ? power supply management ? power analog switching typical application
micrel, inc. mic2560 september 2006 2 m9999-092106 ordering information part number standard pb-free temperature range package mic2560-0bwm mic2560-0ywm ?40c to +85c 16-pin wide soic mic2560-1bwm MIC2560-1YWM ?40c to +85c 16-pin wide soic pin configuration both v cc3 in pins must be connected. all three v cc out pins must be connected. 16-pin wide soic (wm) logic block diagram
micrel, inc. mic2560 september 2006 3 m9999-092106 mic2560-0 control logic table pin 5 v cc5_en pin 6 v cc3_en pin 8 en1 pin 7 en0 pins 2 & 14 v cc out pin 13 v pp out 0 0 0 0 high z high z 0 0 0 1 high z high z 0 0 1 0 high z high z 0 0 1 1 high z clamped to ground 0 1 0 0 3.3 high z 0 1 0 1 3.3 3.3 0 1 1 0 3.3 12 0 1 1 1 3.3 clamped to ground 1 0 0 0 5 high z 1 0 0 1 5 5 1 0 1 0 5 12 1 0 1 1 5 clamped to ground 1 1 0 0 3.3 high z 1 1 0 1 3.3 3.3 1 1 1 0 3.3 5 1 1 1 1 3.3 clamped to ground mic2560-1 logic (compatible with cirrus logic cl-pd6710 & cl -pd6720 controllers) pin 5 v cc5_en pin 6 v cc3_en pin 8 en1 pin 7 en0 pins 2 & 14 v cc out pin 13 v pp out 0 0 0 0 high z clamped to ground 0 0 0 1 high z high z 0 0 1 0 high z high z 0 0 1 1 high z high z 0 1 0 0 5 clamped to ground 0 1 0 1 5 5 0 1 1 0 5 12 0 1 1 1 5 high z 1 0 0 0 3.3 clamped to ground 1 0 0 1 3.3 3.3 1 0 1 0 3.3 12 1 0 1 1 3.3 high z 1 1 0 0 high z clamped to ground 1 1 0 1 high z high z 1 1 1 0 high z high z 1 1 1 1 high z high z
micrel, inc. mic2560 september 2006 4 m9999-092106 absolute maximum ratings (1, 2) power dissipation, t ambient 25c........... internally limited soic. .................................................................800m w derating factors (to ambient) soic .................................................................4mw/c storage temperature (t s ) .........................?65c to +150c maximum operating temp erature (d ie) .................... 125c operating temperature (a mbient) .............. ?40 c to +70c lead temperature (solde ring, 5sec .) ......................... 260c supply voltage (v pp in ) ................................................... 15v v cc3 in ................................................................v cc5 in v cc5 in .................................................................... 7.5v logic input voltages ...................................... ?0.3v to +15v output current (each output) v pp out ................................. >200ma, internally limited v pp out ........................................ >1a, internally limited v pp out , suspend mo de ......................................600ma electrical characteristics (3) (over operating temperature range with v cc3 in = 3.3v, v cc5 in = 5.0v, v pp in = 12v unless otherwise specified.) symbol parameter condition min typ max units input v ih logic 1 input voltage 2.2 15 v v il logic 0 input voltage ?0.3 0.8 v i in input current 0v < v in < 5.5v 1 a vpp output i pp out hi-z high-impedance output leakage current shutdown mode 1v v pp out 12v 1 10 a i ppsc short circuit current limit v pp out = 0 0.2 a select v pp out = 12v 0.55 1 ? select v pp out = 5v 0.7 1 ? switch resistance, i pp out = ?100ma (sourcing) select v pp out = 3.3v 2 3 ? r o switch resistance, i pp out = 50a select v pp out = clamped to ground 0.75 2 k ? v pp switching time t 1 output turn-on rise time v pp out = hi-z to 5v 50 s t 2 output turn-on rise time v pp out = hi-z to 3.3v 40 s t 3 output turn-on rise time v pp out = hi-z to 12v 300 s t 4 output rise time v pp out = 3.3v or 5v to 12v 300 s vcc output i cc out hi-z high impedance output leakage current, note 3 1v v cc out 5v 1 10 a i ccsc short circuit current limit v cc out = 0 1 2 a switch resistance, v cc out = 5.0v i cc out = ?1000ma (sourcing) 70 100 m ? r o switch resistance, v cc out = 3.3v i cc out = ?1000ma (sourcing) 40 66 m ? v cc switching time t 1 rise time v cc out = 0v to 3.3v, iout = 1a 100 600 s t 2 rise time v cc out = 0v to 5.0v, iout = 1a 100 500 s t 3 fall time v cc out = 5.0v to 3.3v 300 s t 4 rise time v cc out = hi-z to 5v 400 s
micrel, inc. mic2560 september 2006 5 m9999-092106 symbol parameter condition min typ max units power supply i cc5 v cc5 in supply current i cc out = 0 0.01 10 a v cc out = 5v or 3.3v, i cc out = 0 30 50 a i cc3 v cc3 in supply current v cc out = hi-z (sleep mode) 0.01 10 a v cc active, v pp out = 5v or 3.3v 15 50 a i pp in v pp in supply current (i pp out = 0) v pp out = hi-z, 0 or v pp 0.01 10 a v cc5 in operating input voltage v cc5 in v cc3 in v cc3 in 5.0 6 v v cc3 in operating input voltage v cc3 in v cc5 in 2.8 3.3 v cc3 in v v pp in operating input vo ltage 8.0 12.0 14.5 v suspend mode (note 4) i cc3 active mode current v pp in = 0v, v cc3 = v cc3 = 3.3v v cc3 = enabled v pp = disabled (hi-z or 0v) 30 a r on v cc v cc out r on v pp in = 0v, v cc5 = v cc3 = 3.3v v cc3 = enabled v pp = disabled (hi-z or 0v) 4.5 ? notes : 1. functional operation above the absolute maximum stress ratings is not implied. 2. static-sensitive device. store onl y in conductive containers. handling per sonnel and equipment should be grounded to prev ent damage from static discharge. 3. leakage current after 1,000 hours at 125c may increase up to five times the initial limit. 4. suspend mode is a pseudo-power-down mode the mic2560 automatically allows when v pp in = 0v, v pp out is deselected, and v cc out =3.3v is selected. under these conditions, the mi c2560 functions in a r educed capacity mode where v cc output of 3.3v is allowed, but at lower current levels (higher switch on-resistance).
micrel, inc. mic2560 september 2006 6 m9999-092106 application information pcmcia v cc and v pp control is easily accomplished using the mic2560 voltage selector/switch ic. four control bits determine v cc out and v pp out voltage and standby/operate mo de condition. v pp out output voltages of v cc (3.3v or 5v), v pp , or a high impedance state are available. when the v cc high impedance condition is selected, the device switches into ?sleep? mode and draws only nano-amperes of leakage current. an error flag falls low if the output is improper, because of overtemperature or overcurr ent faults. full protection from hot switching is provided which prevents feedback from the v pp out to the v cc inputs (from 12v to 5v, for example) by locking out the low voltage switch until v pp out drops below v cc . the v cc output is similarly protected against 5v to 3.3v shoot through. the mic2560 is a low-resistance power mosfet switching matrix that operates from the computer system main power supply. device logic power is obtained from v cc3 and internal mosfet drive is obtained from the v pp in pin (usually +12v) during normal operation. if +12v is not available, the mic2560 automatically switches into ?suspend? mode, where v cc out can be switched to 3.3v, but at higher switch resistance. internal break-before-make switches determine the output voltage and device mode. supply bypassing external capacitors are not required for operation. the mic2560 is a switch and has no stability problems. for best results however, bypass v cc3 in , v cc5 in , and v pp in inputs with filter capacitors to improve output ripple. as all internal device logic and voltage/current comparison functions are powered from the v cc3 in line, supply bypass of this line is the most critical, and may be necessary in some cases. in the most stubborn layouts, up to 0.47f may be necessary. both v cc out and v pp out pins may have 0.01f to 0.1f capacitors for noise reduction and electrostatic discharge (esd) damage prevention. larger va lues of output capacitor might create current spikes during transitions, requiring larger bypass capacitors on the v cc3 in , v cc5 in , and v pp in pins. pcmcia implementation the mic2560 is de signed for compatibility with the personal computer memory card international association?s (pcmcia) specif ication, revision 2.1 as well as the pc card specification, (march 1995), including the cardbus option. the personal computer memory card international association (pcmcia) spec ification requires two v pp supply pins per pcmcia slot. v pp is primarily used for programming flash (eeprom) memory cards. the two v pp supply pins may be programmed to different voltages. fully implementing pcmcia specifications requires a mic2560, a mic2557 pcmcia v pp switching matrix, and a controller. figure 3 shows this full config- uration, supporting both 5.0v and 3.3v v cc operation. figure 3. mic2560 typical pcmcia memory card application with dual v cc (5.0v or 3.3v) and separate v pp1 and v pp2 . figure 4. mic2560 typical pcmcia memory card application with dual v cc (5.0v or 3.3v). note that v pp1 and v pp2 are driven together. however, many cost sensitive designs (especially notebook/palmtop computers) connect v pp1 to v pp2 and the mic2557is not required. this circuit is shown in figure 4. when a memory card is in itially inserted, it should receive v cc ? either 3.3v 0.3v or 5.0v 5%. the initial voltage is determined by a combination of mechanical socket ?keys? and voltage sense pins. the card sends a handshaking data stream to the controller, which then determines whether or not this card requires v pp and if the card is designed for dual v cc . if the card is
micrel, inc. mic2560 september 2006 7 m9999-092106 compatible with and desires a different v cc level, the controller commands this change by disabling v cc , waiting at least 100ms, and then re-enabling the other v cc voltage. if no card is inserted or the system is in sleep mode, the controller outputs a (v cc3 in , v cc5 in ) = (0,0) to the mic2560, which shuts down v cc . this also places the switch into a high impedance output shutdown (sleep) mode, where current consumpt ion drops to nearly zero, with only tiny cmos leakage currents flowing. during flash memory programming with standard (+12v) flash memories, the pcmcia controller outputs a (1,0) to the en0, en1 control pins of the mic2560, which connects v pp in to v pp out . the low on resistance of the mic2560 switches allow using small bypass capacitors (in some cases, none at all) on the v cc out and v pp out pins, with the main filtering action performed by a large filter capacitor on the input supply voltage to v pp in (usually the main power su pply filter capacitor is sufficient). the v pp out transition from v cc to 12.0v typically takes 250s. after programming is completed, the controller outputs a (en1, en0) = (0,1) to the mic2560, which then reduces v pp out to the v cc level for read verification. break-before-make switching action reduces switching transients and lowers maximum current spikes through the switch from the output capacitor. the flag comparator prevents having high voltage on the v pp out capacitor from contaminating the v cc inputs, by disabling the low voltage v pp switches until v pp out drops below the v cc level selected. the lockout delay time varies with the load current and the capacitor on v pp out . with a 0.1f capacitor and nominal i pp out , the delay is approximately 250s. internal drive and bias voltage is derived from v pp in . internal device control logic is powered from v cc3 in . input logic threshold voltages are compatible with common pcmcia controllers using either 3.3v or 5v supplies. no pull-up resistors are required at the control inputs of the mic2560. output current and protection mic2560 output switches are capable of more current than needed in pc card applications (1a) and meet or exceed all pcmcia specifications. for system and card protection, output currents are internally limited. for full system protection, long term (millisecond or longer) output short circuits invoke overtemperature shutdown, protecting the mic2560, the system power supplies, the card socket pins, and the memory card. overtemp- erature shutdown typically occu rs at a die temperature of 115c. single v cc operation for pc card slots requiring only a single v cc , connect v cc3 in and v cc5 in together and to the system v cc supply (i.e., pins 1, 3, and 15 are all connected to system v cc ). either the v cc5 switch or the v cc3 switch may be used to enable the card slot v cc ; generally the v cc3 switch is preferred because of it s lower on resistance. suspend mode an additional feature in the mic2560 is a pseudo power- down mode, suspend mode, which allows operation without a v pp in supply. in suspend mode, the mic2560 supplies 3.3v to v cc out whenever a v cc output of 3.3v is enabled by the pcmcia controller. this mode allows the system designer the ab ility to turn off the v pp supply generator to save power when it is not specifically required. the pcmcia card receives v cc at reduced capacity during suspend mode, as the switch resistance rises to approximately 4.5 ? . figure 5. circuit for generating bias drive for the v cc switches when +12v is not readily available. high current v cc operation without a +12v supply figure 5 shows the mic2560 with v cc switch bias provided by a simple charge pump. this enables the system designer to achieve full v cc performance without a +12v supply, which is oft en helpful in battery powered systems that only provide +12v when it is needed. these on-demand +12v supplies generally have a quiescent current draw of a few milli-amperes, which is far more than the microam peres used by the mic2560. the charge pump of figure 5 provides this low current, using about 100a when enabled. when v pp out =12v is selected, however, the on-demand v pp generator must be used, as this charge pump cannot deliver the current required for flash memory programming. the schottky diode may not be necessary, depending on the configuration of the on-demand +12v generator and whether any other loads are on this line.
micrel, inc. mic2560 september 2006 8 m9999-092106 package information 16-pin wide soic (wm) micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http:/www.micrel.com the information furnished by micrel in this data sheet is belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life suppo rt devices or systems are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchaser?s use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchaser?s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 1999 micrel, incorporated.
|
