M59350FP Watchdog Timer IC with Built-in 5 V Constant-Voltage Power Supply REJ03F0016-0100Z Rev.1.00 Aug.25.2003 Description The M59350FP is an IC developed for use as a watchdog timer with a built-in 5 V constant-voltage power supply. It is provided with functions for power-on reset, constant voltage monitoring, and watchdog timer operation, and can be used as a power supply circuit for various systems. Because it employs a 15-pin flat package, it is ideal for compact system designs. Features • • • • • Built-in power-on reset circuit Built-in 5 V constant-voltage power supply Built-in 5 V constant-voltage power supply monitoring circuit Built-in watchdog timer circuit Compact flat package (SOP, 14P2N, 1.27 mm pitch) Application • ECU power supply circuit for automotive use • Other automotive applications System Block Diagram B COMP VOAd j VO IA d j VB HA LT Constantcurrent circuit RESET VREF P-RUN Internal rise deray circuit: 400 µs Internal fall deray circuit: 10 µs Internal fall deray circuit: 200 µs Watchdog circuit (timer reset period) (power-on reset) GND C1 Rev.1.00, Aug.25.2003, page 1 of 8 EN C2 M59350FP Pin Arrangement (top view) 14 B Vo 1 VoAdj 2 4 C2 5 HALT 6 COMP 7 M59350FP IAdj 3 VREF 13 VB 12 GND 11 RESET 10 EN 9 C1 8 P-RUN Package: 14P2 N- A Pin Description Pin no. Pin symbol Function [1] Vo [13] [14] VB B [2] [3] [4] VoAdj IAdj VREF By connecting an external PNP transistor, pin [1] (VO): 5 V constant voltage output pin [1] (VO): PNP transistor collector connection pin [13] (VB): PNP transistor emitter + power supply connection pin [14] (B): PNP transistor base connection (pin [1]: grounded via capacitor (100 µF)) By connecting a load, adjusts pin [1] (V) constant voltage: 5 V Sets charge/discharge current of capacitors to set time (C1, C2 within IC) Monitors voltage, compares with set voltage to control pin [6] (HALT), pin [11] (RESET) output [5] C2 Delay time from decision that pin [4] (VREF) is "L" until pin [6] (HALT) outputs "L" is set through the grounding capacitance (when open, the IC Built-in capacitance results in a delay time of 10 µs) [6] [7] HALT COMP Outputs pin [4] (VREF) voltage monitoring result Pin for connection of constant-voltage power supply (Vo) phase compensation capacitance [8] [9] P-RUN C1 Detects voltage and period of input clock signal, controls pin [11] (RESET) output Sets the power-on reset time (T3), watchdog time (T2), watchdog reset pulse width (T1) time through the grounding capacitance [10] [11] EN RESET Halts the watchdog function on input of "L" level (open: H input fixed) Outputs judgment result of pin [4] (VREF) voltage monitoring, pin [8] (P-RUN) input clock signal [12] GND GND Rev.1.00, Aug.25.2003, page 2 of 8 M59350FP Absolute Maximum Ratings (Unless otherwise specified, Ta = 25°C) Pin no. Symbol Item Test conditions [13] VB [13] [14] [6], [11] [6], [11] [8], [10] [8], [10] VB IB VOUT IOUT VIN IIN Pd Topr Tstg Power supply voltage Power supply surge voltage Bias current Output voltage Output current Input voltage Input current Power dissipation Operating temperature Storage temperature t ≤ 200 ms Ta = 25°C Ratings Unit −0.3 to 36 −0.3 to 36.5 30 −0.3 to 36 10 −0.3 to 16 −2.0 to 2.0 550 −40 to +85 −55 to +125 V V mA V mA V mA mW °C °C Note: All voltages are relative to the IC GND pin voltage (0 V). All current directions are positive when flowing into the IC (unmarked, or marked with a +), and are negative when flowing out (marked –). Internal power consumption Pd (mW) Thermal Reduction Rate Curve (Maximum Rating) 750 550 500 250 0 25 50 75 85 100 125 Ambient temperature Ta (˚C) Recommended Operating Conditions (Unless otherwise specified, Ta=-40 to +85°C) Pin No. Symbol Item [13] [1] [8], [10] [8], [10] VB VO VIN VOUT Power supply voltage Output power supply voltage Input voltage Output voltage Rev.1.00, Aug.25.2003, page 3 of 8 Conditions Ratings Unit 6 to 16 4.5 to 5.5 0 to VO 0 to VO V V V V M59350FP Electrical Characteristics (Unless otherwise specified, Ta=-40 to +85°C, Io = 50 mA, Ci = 22 µF, Co = 100 µF, C1 = 0.47 µF, Cc = 4700 pF, RIAdj = 18 kΩ) Units Symbol Item Measurement conditions min. typ. max. Unit IB VO VON Reg-IN Reg-L VREF ∆VTH1 IVREF VsatH VsatR ILHAL ILR Bias current Output voltage Input stability Load stability Reference voltage Threshold voltage hysteresis VREF input current HALT output saturation voltage RESET output saturation voltage HALT output leakage current RESET output leakage current Note1 Steady-state VoAdj pin grounded Vcc = 7 to 36 V Io = 1 to 500 mA — 4.75 5.2 — — 1.200 20 — — — — — 9 5.0 5.5 0.1 40 1.265 50 — 0.2 0.2 — — 20 5.25 6.0 0.2 200 1.330 100 10 0.6 0.6 10 10 mA V V %/V mV V mV µA V V µA µA VL-EN IL-EN IIN-P VIN-PH VIN-PL T1(RW) ENL input voltage ENL input current P-RUN input current P-RUN H input voltage P-RUN L input voltage Watchdog reset pulse width T2(RW) T3(R) T4(R) T5(H) T6(H) VB-MIN VO-MIN ID Notes: 1. 2. 3. 4. 5. Note2: VTH1 set to 4.35 V IHALT = 5 mA IRESET = 5 mA VHALT = 5 V VRESET = 5 V — — 0.6 V VIN – EN = 0 V — –250 –500 µA VIN – P = 5 V 100 200 400 µA 2.5 — V — — 0.3 V C1 = 0.22 µF 0.23 0.46 0.69 ms C1 = 0.47 µF 0.5 1 1.5 ms Watchdog time (reset pulse C1 = 0.22 µF 7.3 14.6 21.9 ms interval) C1 = 0.47 µF 15 30 45 ms RESET output delay time (powerC1 = 0.22 µF 14.6 29.2 44.0 ms on reset time) C1 = 0.47 µF 30 60 90 ms RESET output delay time 75 200 450 µA HALT output delay time 150 400 900 µA HALT output delay time C2: open 3 10 25 µA C2 = 4700 pF±10% 1 2 3 ms VB minimum operating voltage Note3, Ta = 25°C — — 2.0 V Vo minimum operating voltage Note4, Ta = 25°C — 0.8 1.0 V Driving current Note5, Ta = 40 to 85°C 8 — — mA The bias current IB is the sum of all currents flowing into the pins [1], [7], [13], [14]. VTH1 is the threshold voltage relative to VREF, and is set using an external resistance. The minimum operating voltage of VB for the operation of various functions The minimum operating voltage Vo at which the HALT output and RESET output can be held at L (when the HALT and RESET output pull-up resistance is 1 kΩ) B (pin [14]) driving current capacity Rev.1.00, Aug.25.2003, page 4 of 8 M59350FP Power Supply Monitoring/Watchdog Timer Timing Diagram Cc= 4700pF Vo Ci= 22µF Co= 100µF 13 14 7 4 Vin1 Vin2 1kΩ 1kΩ 11 Vout1 6 Vout2 8 3 18kΩ 1 5 9 12 C1 C2 Power Supply Monitor Timing Diagram (When a normal pulse is input to P-RUN (pin [8])) t0 (t0<T6) t1 (T6<t1<T6+T4) VREF Vin1 (VREF: 4 pin) T5 T6 T5 T6 T5 Vout2 (HALT: 6 pin) T3 Vout1 (RESET: 11 pin) Rev.1.00, Aug.25.2003, page 5 of 8 T4 T3 T4 T3 M59350FP Watchdog Timer Timing Chart (H input to Vin1 (pin [4], VREF)) (When "L" is input to pin [10] (EN), watchdog function halted) t1(t1<T2) t0(t0>T2) t2(t2>T2) Vin2 (P-RUN: 8 pin) T2+α t3 T1+T2 t4 (t3<T2) Vout1 (t4<T2) (RESET: 11 pin) T1 T2 T1 α T2 T2 T1 T1 VthH C1: 9 pin Output waveform VthL ∴ ( T2 >> T1) Rev.1.00, Aug.25.2003, page 6 of 8 M59350FP Application Example VB 4700pF 1kΩ + 22µF 14 7 1 B COMP VO - R1 13 P-RUN input 8 VB P-RUN RESET 11 HALT 6 + 100µF EN input - 10 EN 3 IAdj 9 C1 VREF 4 C2 5 VoAdj 2 R2 18kΩ + 0.47µF Detection voltage set through R1:R2 resistance ratio Rev.1.00, Aug.25.2003, page 7 of 8 GND 12 HE Rev.1.00, Aug.25.2003, page 8 of 8 G Z1 E EIAJ Package Code SOP14-P-300-1.27 1 14 z e Detail G D JEDEC Code — y b 7 8 Weight(g) 0.2 x M F A Detail F A2 Lead Material Cu Alloy L1 MMP c A1 A A1 A2 b c D E e HE L L1 z Z1 x y Symbol e1 b2 e1 I2 b2 Dimension in Millimeters Min Nom Max — — 2.1 0 0.1 0.2 — 1.8 — 0.35 0.4 0.5 0.18 0.2 0.25 10.0 10.1 10.2 5.2 5.3 5.4 — 1.27 — 7.5 7.8 8.1 0.4 0.6 0.8 — 1.25 — — 1.24 — — — 1.39 — — 0.25 — — 0.1 — 0° 8° — 0.76 — — 7.62 — 1.27 — — Recommended Mount Pad e Plastic 14pin 300mil SOP I2 14P2N-A M59350FP Package Dimensions L Sales Strategic Planning Div. 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