TB9001FN 2004-09-30 1 toshiba bicmos integrated circuit silicon monolithic for automotive use TB9001FN 5 v voltage regulator with watchdog timer the TB9001FN is specially designed for microcomputer systems. the ic features low standby current, oscillator function for cpu sub-clock and various system reset functions. with external power transistor, TB9001FN can supply high output current. as a protective feature, current limiter function is incorporated. for system reset includes low voltage reset, power-on reset, and watchdog timer functions. features ? accurate output: 5.0v 0.15v ? low current consumption: 95a (vin=12v, ta=25c) at 5v output + reset timer + 32khz sub-clock ? reset functions: low voltage reset / power on reset / watchdog timer ? current limiter: adjustable with external resistor ? operating temperature : -40~125c ? small smd package: ssop-20pin weight: 0.1 g (typ.)
TB9001FN 2004-09-30 2 block diagram and pin layout note: some of the functional blocks, circuits, or constants in the block diagram are omitted or simplified to clarify the descriptions of the relevant features. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 gnd vs out vin comp vcc tadj-l tadj-h reset ck sck ws tc tr nc nc nc nc nc nc current limiter constant voltage band gap power on reset 32khz osc logic output
TB9001FN 2004-09-30 3 pin description pin no. symbol description 1 vin power supply input pin. it contains current limiter and startup circuit. 4 vs detection pin for the vcc current limiter. this pin monitors any voltage drop occurring in the external resistor rs between pins vin and vs, and the current limiter is actuated when the voltage drop exceeds 0.7 v. ex.) when the current limiter need to be actuated at a load current of 250ma, rs 0.7 v / 250 ma 2.8 ? 5 out this pin is used to connect the base of an external pnp transistor. the output voltage is controlled by an internal op-amp to keep it stable at 5 v. since the recommended current of iout is 5 ma, an output current of 300ma can be run if the hfe of the external transistor is 60 or more. 6 comp phase compensating pin for vcc. connect a phase compensating capacitor between pin vcc and this pin. 7 vcc voltage detection pin for the 5 v constant-voltage power supply, vcc. this pin also supplies power to the reset timer circuit. 9 tadj-l 10 tadj-h time setup pins for the reset and watchdog timers. for a 32 khz sub-clock, the time is set by combinations of tadj-l and tadj-h. ( these pins must be connected to vcc or 0v because of logic input.) tadj-h = vcc , tadj-l = vcc : tpor = 50ms , twd = 50ms , trst = 5ms tadj-h = vcc , tadj-l = 0v : tpor = 200ms , twd = 100ms , trst = 10ms tadj-h = 0v , tadj-l = vcc : tpor = 50ms , twd = 25ms , trst = 2.5ms tadj-h = 0v , tadj-l = 0v : tpor = 100ms , twd = 50ms , trst = 5ms 11 gnd grounded 12 ck clock input pin for the watchdog timer. this pin detects rising edge of the input signal and does not require external coupling capacitor. 14 ______ reset reset output pin for power on reset and watchdog timer. generates a reset signal that is determined by sub-clock and tadj pins. if no clock is fed to the ck input, this pin generates a reset pulse intermittently. this is an n-mos drain output with 100 k ? pull-up resistor. 16 sck sub-clock output pin for cpu. 17 ws watchdog timer function on / off control pin. set to "low" for active mode and "high" for inactive mode. 19 tc time setup pin for sub-clock. connect capacitor ct to gnd. the time is set using the internal constant current from tr pin. 20 tr time setup pin for sub-clock. connect resistor rt between tc pin and tr pin. 2 , 3 , 8 , 13 , 15 , 18 nc not connected. ( electrically, these pins are completely open. )
TB9001FN 2004-09-30 4 functional description sub-clock oscillation circuit this ic has a built -in sub-clock function the basic circuit configuration of which comprises a cr charge-discharge circuit and a detection circuit for oscillato r abnormalities. the sub-clock is also used as the source oscillation frequency for the timer functions: power on reset, watchdog, and reset. basic operation the resistor rt which sets the charge-and-discharge current, is connected between tc and tr pins, and the capacitor ct is connected between tc and gnd pins. the tc pin is repeatedly charged and discharged between vcc04 and vcc06. if tc pin or tr pin is shorted to vcc or gnd, the reset signal goes to low. external resistor and capacitor vcc06 : vcc x 0.6 vcc04 : vcc x 0.4 fosc ( hz ) = 1 / (( t1 + t2 ) x 2 ) t1 = rt x ct x ln( vcc06 / vcc04 ) t2 = delay time of internal circuit 1s [ example ] ct = 75pf , rt = 480k ? t1 = 480 k ? x 75 pf x ln( 3 v / 2 v ) = 14.6 s fosc = 1 / (( 14.6 s + 1 s ) x 2 ) 32.05 khz gnd vcc04 vcc06 t1 t1 t2 t2 vcc
TB9001FN 2004-09-30 5 timing chart note: timing charts may be simplified to clarify the descriptions of features and operations. maximum rating (ta=25c) characteristic symbol rating unit vin 45(1s) v input voltage comp,sck, ws,vcc, reset --------------------- ,ck, tadj-l/h, tc,tr 6.0 v output current iout 5 ma operating temperature to pr - 4 0~ 12 5 c storage temperature ts t g - 55~ 15 0 c note: the absolute maximum ratings of a semiconductor device are a set of specified parameter values that must not be exceeded during operation, even for an instant. if any of these levels is exceeded during operation, the electrical characteristics may be irreparably altered and the reliability and lifetime of the device can no longer be guar anteed, possibl y causing damage to any other equipment with which it is used. applications using the device should be designed so that the maximum ratings will never be exceeded in any operating conditions. ensuring that the parameter values remain within these specified ranges during device operation will help to ensure that the integrity of the device is not compromised. tpor 5v 0v 0v 0v vcc ck reset twd trst vth-h tpor 0v ws twd td twd td 0v sck vth-h vth-l vth-l
TB9001FN 2004-09-30 6 electrical characteristics ( vin=6~16v , iload=10ma , ta=-40~125c ) characteristic symbol pin test condition min. typ. max. unit ta=-40~105c 4.85 5.0 5.15 output voltage vreg vcc ta=-40~125c 4.82 5.0 5.15 v line regulation vline vcc vin=6~40v - 0.1 0.5 % load regulation vload vcc iload=1~200ma - 0.2 1.0 % temperature coefficient - vcc - 0.01 - %/c output voltage vol reset --------------------- iol=2ma - - 0.3 v output leakage current ileak reset --------------------- vin(reset --------------------- )=vcc - - 5 a vih - vcc x60% - threshold voltage vil tc - vcc x40% - v input current iin tadj-h/l vin(tadj-h/l)=0~vcc -5 - 5 a vih 0.8vcc - - input voltage vil tadj-h/l - - 0.2vcc v input current iin ck vin(ck)=0~vcc -5 - 5 a vih 0.8vcc - - input voltage vil ck - - 0.2vcc v input current iin ws vin(ws)=0~vcc -5 - 5 a vih 0.8vcc - - input voltage vil ws - - 0.2vcc v voh ioh=-1ma vcc-0.5 - - output voltage vol sck iol=+1ma - - 0.5 v current limiter detection vlimit vcc 0.385 0.7 0.945- v ta=25c ( vin = 12v ) *1 - 95 140 current consumption icc - ta=-40~125c ( vin = 12v ) *1 - 95 150 a vth 4.22 4.40 4.55 reset detection voltage ? vth vcc hys 0.05 0.15 0.25 v tpor-hh tadj-h=vcc, -l=vcc 42.5 50 57.5 tpor-hl tadj-h=vcc, -l=0v 170 200 230 tpor-lh tadj-h=0v , -l=vcc 42.5 50 57.5 power on reset tpor-ll reset --------------------- tadj-h=0v , -l=0v 85 100 115 ms twd-hh tadj-h=vcc, -l=vcc 42.5 50 57.5 twd-hl tadj-h=vcc, -l=0v 85 100 115 twd-lh tadj-h=0v, -l=vcc 21.25 25 28.75 watchdog timer twd-ll reset --------------------- tadj-h=0v, -l=0v 42.5 50 57.5 ms trst-hh tadj-h=vcc, -l=vcc 4 5 6 trst-hl tadj-h=vcc, -l=0v 8 10 12 trst-lh tadj-h=0v, -l=vcc 2 2.5 3 reset timer trst-ll reset --------------------- tadj-h=0v, -l=0v 4 5 6 ms reset delay time td reset --------------------- - 10 - s oscillator fosc sck *1 27.2 32 36.8 khz clock pulse width tw ck 3 - - s *1 : rt=480k ? , ct=75pf the rated value for current consumption is the value that applies when the load current iload=0ma. *2 : the rated oscillator frequency, power-on reset, watchdog timer and reset timer values are guaranteed only for the ic itself and do not include any variation caused by external ct and rt components. such variation should be taken into account in the practical application of the ic.
TB9001FN 2004-09-30 7 for practical use of the ic. recommended condition part name ct(min) & rt(max) ct(typ) & rt(typ) ct(max) & rt(min) unit ct 36 75 750 pf rt 1000 480 48 k ? example of appl ication circuit * : caution for wiring 1. c1 and c2 are for absorbing disturbance, noise, etc. connect them as close to the ic as possible. 2. c3 is for phase compensation. as with c1 and c2 above, connect c3 as close to the ic as possible. 3. connect 15-pin nc terminal to gnd to minimize the influence from sck pin on other pins. 4. ensure that the ic is mounted correctly. failing to do so may result in the ic or target equipment being damaged. 5. the application circuit shown above is not intended to guarantee mass production. a thorough evaluation is required when designing an application circuit for mass production. tc vcc vs vb rs 5.0 v vdd c 2 c1 curren t limiter 4700pf po1 ct vin cpu TB9001FN reset out comp sck constant voltage 5v monito r reset time r logic ck xcin 32khz osc tadj rt tr h l ws 480k ? 75pf
TB9001FN 2004-09-30 8 package dimension unit : mm
TB9001FN 2004-09-30 9 ? the information contained herein is subject to change without notice. ? the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba for any infringements of patents or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of toshiba or others. ? toshiba is continually working to im prove the quality and reliab ility of its products. neve rtheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. ? the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunctio n or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. ? the products described in this document are subject to the foreign exchange and foreign trade laws. ? toshiba products should not be embedded to the downstream products which are prohibited to be produced and sold, under any law and regulations. 030619eba restrictions on product use
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