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mic2561 micrel january 2005 1 mic2561 mic2561 pcmcia card socket v cc and v pp switching matrix final information applications pcmcia power supply pin voltage switch data collection systems machine control data input systems wireless communications bar code data collection systems instrumentation configuration/datalogging docking stations (portable and desktop) power supply management power analog switching features complete pcmcia v cc and v pp switch matrix in a single ic no external components required controlled switching times logic options for compatible with industry standard pcmcia controllers no voltage overshoot or switching transients break-before-make switching output current limit and over-temperature shutdown digital flag for error condition indication ultra low power consumption digital selection of v cc and v pp voltages over 750ma of v cc output current 200ma of v pp output current 14-pin soic package general description the mic2561 v cc & v pp matrix controls pcmcia (personal computer memory card international association) memory card power supply pins, both v cc and v pp . the mic2561 switches voltages from the system power supply to v cc and v pp . the mic2561 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 750ma for v cc and 200ma for v pp . for higher v cc output current, please refer to the full-perfor- mance mic2560. the mic2561 provides power management capability under the control of the pc card controller and features overcurrent and thermal protection of the power outputs, zero current ?leep?mode, suspend mode, low power dynamic mode, and on/off control of the pcmcia socket power. the mic2561 is designed for efficient operation. in standby (?leep? mode the device draws very little quiescent current, typically 0.01 a. the device and pcmcia port is protected by current limiting and overtemperature shutdown. full cross- conduction lockout protects the system power supply. system power supply pcmcia card slot controller mic2561 pcmcia card slot 5v 3.3v 12v en0 en1 v pp1 v cc v pp in v cc5 in v cc3 in v cc5_en v cc3_en v pp2 micrel, inc. ? 1849 fortune drive ? san jose, ca 95131 ? usa ? tel + 1 (408) 944-0800 ? fax + 1 (408) 944-0970 ? http://www.mic rel.com ordering information part number standard pb-free temp. range package mic2561-0bm MIC2561-0YM 0 c to +70 c 14-pin soic mic2561-1bm mic2561-1ym 0 c to +70 c 14-pin soic
mic2561 micrel mic2561 2 january 2005 absolute maximum ratings (notes 1 and 2) power dissipation, t ambient 25 c .... internally limited soic ............................................................ 800 mw derating factors (to ambient) soic ........................................................... 4 mw/ c storage temperature ............................ ?5 c to +150 c maximum operating temperature (die) ................ 125 c operating temperature (ambient) .............. 0 c to +70 c lead temperature (5 sec) ...................................... 260 c supply voltage, v pp in ................................................... 15v v cc3 in ....................................................... v cc5 in v cc5 in ............................................................. 7.5v logic input voltages .................................. ?.3v to +15v output current (each output) v pp out .............................................. internally limited v cc out ............................................ internally limited v cc out , suspend mode .............................. 600ma v cc3 in en1 gnd v pp out v cc out v pp in v cc5_en en0 v cc5 in v cc3_en mic2561 control logic flag i limit / thermal shut down 550m ? 700m ? 210m ? 2 ? 110m ? pin configuration gnd 7 6 5 4 3 2 11 10 12 13 14 8 9 v cc3 in v cc out v cc5_en v cc3_en en0 en1 flag v pp in v cc out v cc5 in v pp out v cc out v cc3 in 14-pin so package note: both v cc3 in pins must be connected. all three v cc out pins must be connected. logic block diagram
mic2561 micrel january 2005 3 mic2561 electrical characteristics: (over operating temperature range with v cc3 in = 3.3v, v cc5 in = 5.0v, v pp in = 12v unless otherwise specified.) symbol parameter conditions min typ max units input v ih logic 1 input voltage 2.2 15 v v il logic 0 input voltage ?.3 0.8 v i in input current 0 v < v in < 5.5v 1 a v pp output i pp out high impedance output shutdown mode 0.1 50 a hi-z leakage current 0 v pp out 12v i ppsc short circuit current limit v pp out = 0 0.2 a r o switch resistance, select v pp out = 12v 0.55 1 ? i pp out = ?000ma (sourcing) select v pp out = 5v 0.7 1 select v pp out = 3.3v 2 3 r o switch resistance, select v pp out = clamped to ground 0.75 2 k ? i pp out = 50 a (sinking) v pp switching time (see figure 1) 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 30 s t 5 output turn-off delay v pp out = 12v to 3.3v or 5v 25 75 s t 6 output turn-off delay v pp out = 5v to hi-z 75 200 ns v cc output i cc out high impedance output 1 v cc out 5v 0.1 10 a hi-z leakage current i ccsc short circuit current limit v cc out = 0 1.5 2 a r o switch resistance, i cc out = ?50 ma (sourcing) 210 300 m ? v cc out = 5.0v r o switch resistance, i cc out = ?50 ma (sourcing) 110 185 m ? v cc out = 3.3v
mic2561 micrel mic2561 4 january 2005 electrical characteristics (continued) symbol parameter conditions min typ max units v cc switching time t 1 rise time (10% to 90%) v cc out = 0v to 3.3v, i out = 750ma 70 140 s t 2 rise time (10% to 90%) v cc out = 0v to 5.0v 50 60 s t 3 fall time (note 3) v cc out = 5.0v to 0v or 3.3v to 0v 40 s t 4 rise time v cc out = hi-z to 5v 60 s power supply i cc5 v cc5 in supply current i cc out = 0 0.01 10 a i cc3 v cc3 in supply current v cc out = 5v or 3.3v, i cc out = 0 30 100 a v cc out = hi-z (sleep mode) 0.01 10 i pp in v pp in supply current v cc active, v pp out = 5v or 3.3v 15 30 a i pp out =0 v pp out = hiz, 0, or v pp 0.01 10 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 cc5 in v v pp in operating input voltage 8.0 12.0 14.5 v suspend mode (note 6) i cc3 suspend mode active current v pp in = 0v, v cc5 = v cc3 = 3.3v 30 100 a (from v cc3 )v cc5 = enabled v pp = disabled (hi-z or 0v) r on v cc v cc out r on v pp in = 0v, v cc5 = v cc3 = 3.3v 4.5 6 ? v cc3 = enabled v pp = disabled (hi-z or 0v) note 1: functional operation above the absolute maximum stress ratings is not implied. note 2: static-sensitive device. store only in conductive containers. handling personnel and equipment should be grounded to prevent da mage from static discharge. note 3: from 90% of v out to 10% of v out . r l = 2.1k ? note 6: suspend mode is a pseudo power-down mode the mic2561 automatically allows when v pp in = 0v, v pp out is deselected, and v cc out = 3.3v is selected. under these conditions, the mic2561 functions in a reduced capacity mode where v cc output of 3.3v is allowed, but at lower current levels (higher switch on resistance).
mic2561 micrel january 2005 5 mic2561 mic2561-0 control logic table pin 1 pin 2 pin 4 pin 3 pins 8 & 12 pin 7 v cc5_en v cc3_en en1 en0 v cc out v pp out 0000 high z high z 0001 high z high z 0010 high z high z 0011 high z clamped to ground 0100 3.3 high z 0101 3.3 3.3 0110 3.3 12 0111 3.3 clamped to ground 1000 5 high z 1001 5 5 1010 5 12 1011 5 clamped to ground 1100 3.3 high z 1101 3.3 3.3 1110 3.3 5 1111 3.3 clamped to ground pin 1 pin 2 pin 4 pin 3 pins 8 & 12 pin 7 v cc5_en v cc3_en v pp_pgm v pp_ v cc v cc out v pp out 000 0 high z clamped to ground 000 1 high z high z 001 0 high z high z 001 1 high z high z 010 05 clamped to ground 0101 5 5 0110 5 12 011 15 high z 100 0 3.3 clamped to ground 1001 3.3 3.3 1010 3.3 12 101 1 3.3 high z 110 0 high z clamped to ground 110 1 high z high z 111 0 high z high z 111 1 high z high z mic2561-1 logic (compatible with cirrus logic cl-pd6710 & cl-pd6720 controllers) note: other control logic patterns are available. please contact micrel for details.
mic2561 micrel mic2561 6 january 2005 applications information pcmcia v cc and v pp control is easily accomplished using the mic2561 voltage selector/switch ic. four control bits determine v cc out and v pp out voltage and standby/ operate mode 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 ?leep?mode and draws only nano- amperes of leakage current. an error flag falls low if the output is improper, because of overtemperature or overcurrent 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 mic2561 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 avail- able, the mic2561 automatically switches into ?uspend mode, where v cc out can be switched to 3.3v, but at higher switch resistance. internal break-before-make switches de- termine the output voltage and device mode. supply bypassing external capacitors are not required for operation. the mic2561 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 func- tions 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 0.47 f may be necessary. both v cc out and v pp out pins may have 0.01 f to 0.1 f capacitors for noise reduction and electrostatic discharge (esd) damage prevention. larger values 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 personal computer memory card international associa- tion (pcmcia) specification 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 pcm- cia specifications requires a mic2561, a mic2557 pcmcia v pp switching matrix, and a controller. figure 3 shows this full configuration, supporting both 5.0v and 3.3v v cc opera- tion. figure 3. mic2561 typical pcmcia memory card application with dual v cc (5.0v or 3.3v) and separate v pp1 and v pp2. system power supply pcmcia card slot controller mic2561 pcmcia card slot 5v 3.3v 12v en0 en1 v pp1 v cc v pp in v cc5 in v cc3 in v cc5_en v cc3_en v pp2 mic2557 en0 en1 v pp in v dd v pp out v cc
mic2561 micrel january 2005 7 mic2561 however, many cost sensitive designs (especially notebook/ palmtop computers) connect v pp1 to v pp2 and the mic2557 is not required. this circuit is shown in figure 4. when a memory card is initially 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 ?eys 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 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 mic2561, which shuts down v cc . this also places the switch into a high impedance output shutdown (sleep) mode, where current consumption 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 mic2561, which connects v pp in to v pp out . the low on resistance of the mic2561 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 supply filter capacitor is sufficient). the v pp out transition from v cc to 12.0v typically takes 15 s. after programming is completed, the controller outputs a (en1, en0) = (0,1) to the mic2561, which then reduces v pp out to the v cc level for read verification. break-before-make switching action re- duces 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 0.1 f capacitor and nominal i pp out , the delay is approximately 250 s. 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 mic2561. output current and protection mic2561 output switches are capable of more current than needed in pcmcia applications and meet or exceed all pcmcia specifications. for system and card protection, output currents are internally limited. for full system protec- tion, long term (millisecond or longer) output short circuits invoke overtemperature shutdown, protecting the mic2561, the system power supplies, the card socket pins, and the memory card. the mic2561 overtemperature shutdown oc- curs at a die temperature of 110 c. suspend mode an additional feature in the mic2561 is a pseudo power-down mode, suspend mode, which allows operation without a v pp in supply. in suspend mode, the mic2561 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 ability 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 ? . high current v cc operation without a +12v supply figure 5 shows the mic2561 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 often helpful in battery powered systems that only provide +12v when it is needed. these on-demand +12v system power supply pcmcia card slot controller mic2561 pcmcia card slot 5v 3.3v 12v en0 en1 v pp1 v cc v pp in v cc5 in v cc3 in v cc5_en v cc3_en v pp2 figure 4. mic2561 typical pcmcia memory card application with dual v cc (5.0v or 3.3v). note that v pp1 and v pp2 are driven together.
mic2561 micrel mic2561 8 january 2005 supplies generally have a quiescent current draw of a few milliamperes, which is far more than the microamperes used by the mic2561. the charge pump of figure 5 provides this low current, using about 100 a 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. 0.01? 4.7k ? 1n914 1n914 0.1? 0.02? switched v pp in (optional schottky) +5v drive enable 7 6 5 4 3 2 11 10 12 13 14 8 9 figure 5. circuit for generating bias drive for the vcc switches when +12v is not readily available.
mic2561 micrel january 2005 9 mic2561 package information 45 3 ? 0.244 (6.20) 0.228 (5.80) 0.344 (8.75) 0.337 (8.55) 0.006 (0.15) seating plane 0.026 (0.65) max ) 0.016 (0.40) typ 0.154 (3.90) 0.057 (1.45) 0.049 (1.25) 0.193 (4.90) 0.050 (1.27) typ pin 1 dimensions: inches (mm) 14-pin sop (m)
mic2561 micrel mic2561 10 january 2005
mic2561 micrel january 2005 11 mic2561
mic2561 micrel mic2561 12 january 2005 micrel inc. 1849 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 web http://www.micrel.com this information is believed to be accurate and reliable, however no responsibility is assumed by micrel for its use nor for an y infringement of patents or other rights of third parties resulting from its use. no license is granted by implication or otherwise under any patent or pat ent right of micrel inc. ?2005 micrel incorporated

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