TDA8137 DUAL 5.1V REGULATOR WITH DISABLE AND RESET .. .. . .. OUTPUT CURRENTS UP TO 1A FIXED PRECISION OUTPUT VOLTAGES 5.1V ± 2% OUTPUT 1 WITH RESET FACILITY OUTPUT 2 WITH DISABLE BY TTL INPUT SHORT CIRCUIT PROTECTION AT BOTH OUTPUTS THERMAL PROTECTION LOW DROP OUTPUT VOLTAGE DESCRIPTION The TDA8137 is a monolithic dual positive voltage regulator designed to provide fixed precision output voltages of 5.1V at currents up to 1A. An internal reset circuit generates a reset pulse when the output 1 decreases below the regulated voltage value. Output 2 can be disabled by TTL input. Short circuit and thermal protections are included. HEPTAWATT (Plastic Package) ORDER CODE : TDA8137 PIN CONNECTION (top view) 7 6 5 4 3 2 1 OUTPUT 1 OUTPUT 2 RESET GROUND DISABLE DELAY CAP INPUT 8137-01.EPS Tab connected to Pin 4 September 1993 1/5 TDA8137 BLOCK DIAGRAM IN 1 REFERENCE 7 OUT 1 OUT 1 5 PROTECTION RESET RESET CR 2 DELAY CAPACITOR DISABLE 3 DISABLE OUT 2 6 OUT 2 TDA8137 8137-02.EPS 4 Symbol VIN VDIS VRST I01, 2 Pt TSTG Tj Parameter DC Input Voltage Pin 1 Disable Input Voltage Pin 3 Output Voltage at Pin 5 Output Currents Power Dissipation Storage Temperature Junction Temperature Value 20 20 20 Internally Limited Internally Limited – 65 to + 150 0 to + 150 Unit V V V Value 3 0 to + 150 Unit °C/W °C °C °C 8137-04.TBL ABSOLUTE MAXIMUM RATINGS Symbol RTH(j-c) Tj Parameter Thermal Resistance Junction-case Recommended Junction Temperature Max. Max. 8137-02.TBL THERMAL DATA Symbol V01, 2 VI 01, 2 ∆ V01, 2LI ∆ V01, 2LO IQ V01RST VRTH tRD VRL 2/5 Parameter Output Voltage Dropout Voltage Line Regulation Load Regulation Quiescent Current Reset Threshold Voltage Reset Threshold Hysteresis Reset Pulse Delay at Pin 5 Saturation Volt. at Pin 5 in Reset Condition Test Conditions I01, 2 = 10mA 7V < VIN < 14V, 5mA < I0 < 750mA I01, 2 = 750mA I01, 2 = 1A 7V < VIN < 14V, I01, 2 = 200mA 5mA < I01, 2 < 0.6A I01 = 10mA, Output 2 Disabled (K = V01) (see circuit description) Ce = 100nF (see circuit description) I5 = 5mA Min. 5 4.9 Typ. 5.1 K–0.4 20 K–.25 50 25 Max. 5.2 5.3 1.4 2 50 100 2 K–0.1 75 0.4 Unit V V V V mV mV mA V mV ms V 8137-03.TBL ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified) TDA8137 ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified) (continued) Parameter IRH Test Conditions Leakage Current at Pin 5 in Normal Condition V5 = 10V K01,2 Output Volt. Thermal Drift ∆Vo ⋅ 106 K0 = ∆T ⋅ VO Tj = 0 to + 125°C I01,2SC Short Circ. Output Current Min. Typ. VIN = 7V Disable Volt. at Pin 3 High (out 2 active) VDISL Disable Volt. at Pin 3 Low (out 2 disabled) IDIS Disable Bias Current at Pin 3 Tjsd Junction Temp. for Thermal Shut Down Unit µA 10 100 VIN = 16V, (see note 1) VDISH Max. ppm/°C 1.6 A 1 A 2 0V < VDIS < 7V V -100 0.8 V 2 µA 8137-04.TBL Symbol °C 145 Note 1 : The output short circuit currents are tested one channel at time. During a short circuit a large consumption of power occurs, anyway the thermal protection circuit guarantees the temperature not overcomes high value. Safe permanent short-circuit is only guaranteed for input voltages up to 16V. Figure 1 10µA REF 2.5V + - OUT 1 7 a - 50 + b RESET 5 REG Ce 8137-03.EPS 2 2.5V 0.6V Figure 2 5.1V ∆VOUT LOW 4.9V 4.85V TD 8137-04.EPS RESET TD 3/5 TDA8137 CIRCUIT DESCRIPTION The Reset circuit checks the voltage at the output 1. If this one goes below VOUT - 0.25V (4.85V Typ.), the comparator "a" (see Figure 1) discharges rapidly the capacitor Ce and the reset output goes at once low. When the voltage at the OUT 1 rises above VOUT -0.2V (4.9V Typ.), the voltage VCe increases linearly to 2.5V corresponding to a delay Ce ⋅ 2.5V td following the low : td = (see figure 2), 10µA then the reset output goes high again. To avoid glitches in the reset output, the second comparator "b" has a large hysteresis (1.9V). The TDA8137 is a dual voltage regulator with Reset and Disable. The two regulation parts are supplied from one voltage reference circuit trimmed by zener zap during EWS test. Since the supply voltage of this last is connected at Pin 1 (VIN1), the regulator 2 will not work if the Pin 1 is not supplied. The outputs stages have been realized in darlington configuration with a drop typical of 1.2V. The disable circuit, switches off the output 2 if a voltage lower than 0.8V is applied at pin 3. TYPICAL APPLICATION 1 VIN1 7 V O1 6 V O2 TDA8137 2 Ce 4 5 RESET 3 C3 DISABLE . C1 . C3 = 10µF 4/5 C2 8137-05.EPS C1 TDA8137 PACKAGE MECHANICAL DATA 9 PINS - PLASTIC HEPTAWATT E L D1 C D M A M1 L1 L5 L2 G2 G1 H3 G L3 F PM-HEPTV.EPS L7 H2 F1 Dia. L6 A C D D1 E F F1 G G1 G2 H2 H3 L L1 L2 L3 L5 L6 L7 M M1 Dia. Min. Millimeters Typ. 2.4 1.2 0.35 0.6 2.41 4.91 7.49 2.54 5.08 7.62 10.05 Max. 4.8 1.37 2.8 1.35 0.55 08 0.9 2.67 5.21 7.8 10.4 10.4 Min. 0.094 0.047 0.014 0.024 0.095 0.193 0.295 Max. 0.189 0.054 0.110 0.053 0.022 0.031 0.035 0.105 0.205 0.307 0.409 0.409 0.668 0.587 0.848 0.891 3 15.8 6.6 0.102 0.594 0.236 2.8 5.08 3.65 0.100 0.200 0.300 0.396 16.97 14.92 21.54 22.62 2.6 15.1 6 Inches Typ. 0.118 0.622 0.260 0.110 0.200 3.85 0.144 HEPTV.TBL Dimensions 0.152 Information furnished is believed to be accurate and reliable. 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