TB9001FNG TOSHIBA BiCMOS INTEGRATED CIRCUIT SILICON MONOLITHIC FOR AUTOMOTIVE USE TB9001FNG 5 V Voltage Regulator with Watchdog Timer The TB9001FNG 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, TB9001FNG 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 SSOP20-P-225-0.65A watchdog timer functions. Weight : 0.1g(typ.) FEATURES • Accurate output : 5.0V ± 0.15V • Low current consumption : 95µA (VIN=12V, Ta=25°C) 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 : -40~125°C • Small SMD package : SSOP-20pin About solderability, the following conditions were confirmed. Solderability (1) Use of Sn-37Pb solder Bath z solder bath temperature = 230°C z dipping time = 5 seconds z the number of times = once z use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath z solder bath temperature = 245°C z dipping time = 5 seconds z the number of times = once z use of R-type flux 1 2007-03-19 TB9001FNG NC WS SCK NC RESET NC 19 18 17 16 15 14 13 CK GND 11 TC 12 TR 20 BLOCK DIAGRAM AND PIN LAYOUT Output 32kHz OSC LOGIC Power ON Reset Band Gap Note: 3 4 5 6 7 8 NC NC VS OUT COMP VCC NC 10 2 VIN 9 1 Current Limiter Constant Voltage TADJ-L TADJ-H Some of the functional blocks, circuits, or constants in the block diagram are omitted or simplified to clarify the descriptions of the relevant features. 2 2007-03-19 TB9001FNG PIN DESCRIPTION PIN No. SYMBOL 1 VIN DESCRIPTION Power supply input pin. It contains current limiter and startup circuit. 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 4 Vs 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 Ω This pin is used to connect the base of an external PNP transistor. The output voltage is 5 OUT 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 7 Vcc Phase compensating pin for Vcc. Connect a phase compensating capacitor between pin Vcc and this pin. Voltage detection pin for the 5 V constant-voltage power supply, Vcc. This pin also supplies power to the reset timer circuit. Time setup pins for the reset and watchdog timers. For a 32 kHz sub-clock, the time is set 9 10 TADJ-L by combinations of TADJ-L and TADJ-H. ( These pins must be connected to Vcc or 0V because of logic input.) TADJ-H 11 GND 12 CK z TADJ-H = Vcc , TADJ-L = Vcc : TPOR = 50ms , TWD = 50ms , TRST = 5ms z TADJ-H = Vcc , TADJ-L = 0V : TPOR = 200ms , TWD = 100ms , TRST = 10ms z TADJ-H = 0V , TADJ-L = Vcc : TPOR = 50ms , TWD = 25ms , TRST = 2.5ms z TADJ-H = 0V , TADJ-L = 0V : TPOR = 100ms , TWD = 50ms , TRST = 5ms Grounded Clock input pin for the watchdog timer. This pin detects rising edge of the input signal and does not require external coupling capacitor. Reset output pin for power on reset and watchdog timer. 14 ______ z Generates a reset signal that is determined by sub-clock and TADJ pins. RESET z 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 kΩ pull-up resistor. 16 SCK 17 WS 19 TC 20 TR Time setup pin for sub-clock. Connect resistor RT between TC pin and TR pin. NC Not connected. ( Electrically, these pins are completely open. ) 2 , 3 , 8 , 13 , 15 , 18 Sub-clock output pin for CPU. Watchdog timer function ON / OFF control pin. Set to "Low" for active mode and "High" for Inactive mode. Time setup pin for sub-clock. Connect capacitor CT to GND. The time is set using the internal constant current from TR pin. 3 2007-03-19 TB9001FNG 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 oscillator 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 ≈ 1µs [ Example ] CT = 75pF , RT = 480kΩ t1 = 480 kΩ x 75 pF x ln( 3 V / 2 V ) = 14.6 µs fosc = 1 / (( 14.6 µs + 1 µs ) x 2 ) ≈ 32.05 kHz t1 t1 t2 VCC VCC06 VCC04 t2 GND 4 2007-03-19 TB9001FNG TIMING CHART 5V VTH-L （VTH－ΔVTH） VTH VTH VTH-L （VTH－ΔVTH） TPOR T WD Vcc 0V CK 0V RESET 0V TPOR WS Td T RST T WD Td 0V T WD SCK 0V Note1: See ELECTRICAL CHARACTERISTICS about symbols in timing charts. Note2: Timing charts may be simplified to clarify the descriptions of features and operations. ABSOLUTE MAXIMUM RATING (Ta=25°C) CHARACTERISTIC Input Voltage SYMBOL PIN RATING VIN1 VIN,VS 45 (1s) VIN2 VCC CK,WS,TC, TADJ-H,TADJ-L 6.0 VIN3 IOUT1 Output Current Output Voltage OUT ------------------ 5 RESET 5 IOUT3 SCK ±1 OUT 45 (1s) ------------------ V VCC IOUT2 VOUT1 UNIT mA V VOUT2 RESET,SCK VCC Operating Temperature Topr - −40~125 °C Storage Temperature Tstg - −55~150 °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 guaranteed, possibly causing damage to any other equipment with which it is used. Applications using the device should be designed so that the absolute 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. 5 2007-03-19 TB9001FNG ELECTRICAL CHARACTERISTICS ( VIN=6~16V , ILOAD=10mA , Ta=-40~125°C ) CHARACTERISTIC SYMBOL PIN Output Voltage VREG Vcc Line Regulation Load Regulation Temperature Coefficient VLINE VLOAD Vcc Vcc - Output Voltage Output Leakage Current VOL ILEAK TEST CONDITION Ta=-40~105°C Ta=-40~125°C VIN=6~40V ILOAD=1~200mA Vcc --------------------- RESET IOL=2mA --------------------- RESET --------------------- VIN(RESET)=Vcc IIN VIH VIL IIN VIH VIL IIN VIH VIL VOH VOL Input Voltage Input Current Input Voltage Input Current Input Voltage Output Voltage Watchdog Timer Reset Timer - 0.01 - %/°C - - 0.3 V - - 5 µA TADJ-H/L µA 0.385 0.7 0.945- V *1 - 95 140 Ta=-40~125°C ( VIN = 12V ) *1 - 95 150 Hys TADJ-H=Vcc, -L=Vcc TADJ-H=Vcc, -L=0V 4.22 0.05 42.5 170 4.40 0.15 50.0 200 4.55 0.25 57.5 230 TADJ-H=0V , -L=Vcc 42.5 50.0 57.5 VIN(CK)=0~Vcc CK WS VIN(WS)=0~Vcc WS SCK Vcc Icc - IOH=-1mA IOL=+1mA Ta=25°C ( VIN = 12V ) VTH-L ∆VTH TPOR-HH TPOR-HL TPOR-LH Vcc --------------------- RESET TPOR-LL TADJ-H=0V , -L=0V TWD-HH TWD-HL TWD-LH TWD-LL TRST-HH TRST-HL TRST-LH TRST-LL TADJ-H=Vcc, TADJ-H=Vcc, TADJ-H=0V, TADJ-H=0V, TADJ-H=Vcc, TADJ-H=Vcc, TADJ-H=0V, TADJ-H=0V, Reset Delay Time td Oscillator Clock Pulse Width fosc Tw --------------------- RESET --------------------- RESET -L=Vcc -L=0V -L=Vcc -L=0V -L=Vcc -L=0V -L=Vcc -L=0V --------------------- RESET SCK CK % % 5 0.2Vcc 5 0.2Vcc 5 0.2Vcc 0.5 VIN(TADJ-H/L)=0~Vcc TADJ-H/L CK V -5 0.8Vcc -5 0.8Vcc -5 0.8Vcc Vcc-0.5 - - VLIMIT Current Consumption Power On Reset UNIT TC Input Current Reset Detection Voltage MAX. 5.15 5.15 0.5 1.0 - VIL Current Limiter Detection TYP. 5.0 5.0 0.1 0.2 Vcc X60% Vcc X40% - VIH Threshold Voltage MIN. 4.85 4.82 - *1 V - µA V µA V V µA V ms 85 100 115 42.5 85 21.25 42.5 4 8 2 4 50.0 100 25.00 50.0 5 10 2.5 5 57.5 115 28.75 57.5 6 12 3 6 - 10 - µs 27.2 3 32.0 - 36.8 - kHz µs *1 : RT=480kΩ , 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. 6 V 2007-03-19 ms ms TB9001FNG RECOMMENDED CONDITION CT(min) CT(typ) CT(max) & & & RT(max) RT(typ) RT(min) CT 36 75 750 pF RT 1000 480 48 kΩ Part Name Unit EXAMPLE OF APPLICATION CIRCUIT Rs ＋ C3 4700pF C1 VIN Vs Current Limiter TB9001FNG 32kHz OSC 480kΩ COMP OUT VDD ＋ C2 Vcc 5V Monitor Constant Voltage CPU RESET TR RT CT 75pF 5.0V 10µF 10µF VB Reset Timer Logic L H TC TADJ CK SCK 15pin Po1 XCIN WS Note1: Caution for Wiring C1 and C2 are for absorbing disturbance, noise, etc. Connect them as close to the IC as possible. C3 is for phase compensation. As with C1 and C2 above, connect C3 as close to the IC as possible. Connect 15-pin NC terminal to Gnd to minimize the influence from SCK pin on other pins. Note2: Ensure that the IC is mounted correctly. Failing to do so may result in the IC or target equipment being damaged. Note3: 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. 7 2007-03-19 TB9001FNG PACKAGE DIMENSION Unit : mm 8 2007-03-19 TB9001FNG RESTRICTIONS ON PRODUCT USE 070313EBA_S • The information contained herein is subject to change without notice. 021023_D • TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, 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. 021023_A • The TOSHIBA products listed in this document are designed and manufactured for usage in automotive electronic equipment. These TOSHIBA products are neither intended nor warranted for usage in equipment other than automotive electronic equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage includes atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. TOSHIBA products listed in this document shall not be used for other than automotive electronic equipment such as the applications listed above. 070313_AG • The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q • 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 patents or other rights of TOSHIBA or the third parties. 070122_C • The products described in this document are subject to foreign exchange and foreign trade control laws. 060925_E 9 2007-03-19