Ordering number : EN2770B Monolithic Linear IC LA5692D, 5692S, 5692M Voltage Regulator Driver with Watchdog Timer Overview Package Dimensions The LA5692 is a single-chip voltage regulator for unit: mm microcomputer system monitor use that performs the 3001B-DIP8 functions of 5V output voltage control, watchdog timer, and voltage detector. Since the LA5692 can hold the reset output, it is especially suited for use in peripheral control and monitor output applications (example : valves used in refrigeration equipment, hot water supply system). [LA5692D] 8 0.25 7.62 6.4 5 1 4 0.5 0.89 Functions 3.0 3.9max • Microcomputer system for car equipment, refrigeration/ heating equipment, office automation equipment. 3.2 Applications 0.51min 9.4 1.4 SANYO : DIP8 2.54 unit: mm • Output voltage 5V control. • Watchdog timer. • Reset generation at power-ON mode. • Reset hold output [RES (2)] (Cleared with CK reinput). 3017B-SIP9 [LA5692S] 22.3 3.0 0.51 min 3.2 1.0 • An external PNP transistor can be used to provide a lowsaturation voltage regulator. • CK input with edge detector. • Variable detection voltage. • The watchdog time can be made longer. 4.8 Features 5.7 max 1.5 1 0.99 9 2.54 1.3 0.5 0.25 1.35 SANYO : SIP9 unit: mm 3032B-MFP8 0.625 [LA5692M] 8 4.4 5.15 6.4 5 4 1.8max 1 0.15 0.1 1.5 5.1 0.35 1.27 0.645 SANYO : MFP8 SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN D0597HA (KT)/8099YT/8037TA, TS No.2770-1/6 LA5692D, 5692S, 5692M Specifications Maximum Ratings at Ta=25°C Parameter Symbol Conditions Ratings 1s Unit Control pin voltage VCONTmax Control pin voltage VCONTmax Control pin current ICONTmax CK input voltage VCKmax Reset pin voltage VRES(1)max, 41 V LA5692D, 5692S 500 mW LA5692M 370 mW *VCC≥6V 60 V 41 V 11 mA 25 V VRES(2)max Allowable power dissipation Pd max Operating temperature Topr –40 to +85 °C Storage temperature Tstg –55 to +150 °C * : A PNP transistor is connected to the LA5692D, 5692S externally to provide a low-saturation voltage regulator. Therefore, ICONT≈100mA will flow, as starting current, in the VCC range where the output cannot be regulated. Operating Conditions at Ta=25°C Parameter Symbol Control pin voltage VCONT Control pin current ICONTmax Reset output current IRES(1)max, Conditions Ratings Unit 6 to 40 External R pull-up V 10 mA 8 mA 4 V IRES(2)max Reset detection voltage VS min Operating Characteristics at Ta=25°C, VCC=14V, IO=50mA, unless otherwise specified. Parameter Symbol Conditions Ratings min typ max 4.8 Unit Output voltage VO 5.0 5.2 V Line regulation1 ∆VOLN1 9V≤VCC≤16V 2 10 mV Line regulation2 ∆VOLN2 6V≤VCC≤40V 4 30 mV Load regulation ∆VOLD 1mA≤IO≤50mA 4 30 mV Current dissipation ICC IO=0 4.4 6.5 mA Output noise voltage VNO 10Hz≤f≤100kHz, VCK=0 150 µV Temperature coefficient ∆VO /∆Ta IO=5mA, –40°C≤Ta≤+85°C ±0.2 mV/°C of output voltage 1.13 Reference voltage VREF ‘H’-level CK input voltage VIH ‘L’-level CK input voltage VIL ‘H’-level CK input current IIH VCK=5V ‘L’-level CK input current IIL VCK=0V ‘H’-level reset output voltage VORH(1)/ RES(2) : 10kΩ pull-up 1.18 1.23 2 V V 0.3 0.8 V 0.7 mA –1.0 –0.1 4.8 5.0 5.2 µA V RES(2) : 10kΩ pull-up 40 200 mV ‘L’-level reset output voltage2 VORL(1)2/ VORL(2)2 IRES(1)=IRES(2)=8mA 0.16 0.8 V CK input pulse width tCKW VCK=5V Reset output delay time td Ct=1µF 7.5 10 12.5 ms Watchdog time tWD Ct=1µF 30 40 50 ms Watchdog reset time tWR Ct=1µF 0.1 0.25 0.4 ms Reset hysteresis voltage Vhys VS=4.5V 100 200 300 mV VORH(2) ‘L’-level reset output voltage1 VORL(1)1/ VORL(2)1 3 µs No.2770-2/6 LA5692D, 5692S, 5692M Pin Assignment Do not use the NC pin. Top view Equivalent Circuit Block Diagram Starter Error amp Reset generator Voltage detector RES(1) : Contains a pull-up resistor of 10kΩ. RES(2) : Open collector Test Circuit Unit (resistance : Ω, capacitance : F) No.2770-3/6 LA5692D, 5692S, 5692M Sample Application Circuit Unit (resistance : Ω, capacitance : F) Note on application 1. For stable operation, place Cin, CO, and TR1 as near to the IC as possible. 2. When used in 0°C or below it, a capacitor of which impedance at high-frequency operation is low and has a good temperature characteristic (such as SANYO OS-CON capacitor or others) should be used to prevent oscillation. 3. Set VS to the output voltage level where the circuit will be reset using external resistors R1 and R2. VS should be set to 4V or greater due to internal circuit operation. 4. CCK must be inserted to cut the high range element of clock noise to prevent it from becoming a reset output noise. 5. For Ct, a capacitor which less varies the capacitance according to the temperature should be used. Timing Chart Application of power Instantaneous drop Digital output at I/O port of microcomputer Microcomputer operation start CPU abnormality Note : Edge-triggered at the point indicated by the arrow of CK signal. No.2770-4/6 Output voltage, VO – V Allowable power dissipation, Pd max – mW LA5692D, 5692S, 5692M Supply voltage, VCC – V Output voltage, VO – V Reset output voltage, VRES – V Ambient temperature, Ta – °C Indeterminate operation Ambient temperature, Ta – °C Current drain, ICC – mA Current drain, ICC – mA Output voltage, VO – V Ambient temperature, Ta – °C Ripple rejection, Rrej – dB Reset output delay time, td – ms Watchdog time, tWD – ms Supply voltage, VCC – V Frequency, f – Hz Ambient temperature, Ta – °C No.2770-5/6 Watchdog time, tWR – ms CK input threshold voltage, VIN – V LA5692D, 5692S, 5692M Ambient temperature, Ta – °C CK input current, IIH – µA L reset output voltage, VORL(2) – mV Ambient temperature, Ta – °C Ambient temperature, Ta – °C Reset output current, IRES(2) – mA No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibilty for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of December, 1997. Specifications and information herein are subject to change without notice. No.2770-6/6