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| 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. PIN CONNECTION (top view) HEPTAWATT (Plastic Package) ORDER CODE : TDA8137 7 6 5 4 3 2 1 OUTPUT 1 OUTPUT 2 RESET GROUND DISABLE DELAY CAP INPUT Tab connected to Pin 4 September 1993 1/5 8137-01.EPS TDA8137 BLOCK DIAGRAM IN 1 REFERENCE OUT 1 7 OUT 1 5 PROTECTION RESET RESET CR DELAY CAPACITOR 2 DISABLE 3 DISABLE OUT 2 6 OUT 2 TDA8137 8137-02.EPS 4 ABSOLUTE MAXIMUM RATINGS 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 C C THERMAL DATA Max. Max. 8137-02.TBL 8137-03.TBL Symbol RTH(j-c) Tj Parameter Thermal Resistance Junction-case Recommended Junction Temperature Value 3 0 to + 150 Unit C/W C ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified) Symbol V01, 2 VI 01, 2 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 V01, 2LI V01, 2LO IQ V01RST VRTH tRD VRL 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 2/5 8137-04.TBL TDA8137 ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified) (continued) Symbol IRH K01,2 Parameter Leakage Current at Pin 5 in Normal Condition Output Volt. Thermal Drift Test Conditions V5 = 10V Vo 106 K0 = T VO Tj = 0 to + 125C VIN = 7V VIN = 16V, (see note 1) VDISH VDISL IDIS Tjsd Disable Volt. at Pin 3 High (out 2 active) Disable Volt. at Pin 3 Low (out 2 disabled) Disable Bias Current at Pin 3 Junction Temp. for Thermal Shut Down 0V < VDIS < 7V -100 145 2 0.8 2 100 Min. Typ. Max. 10 Unit A ppm/C I01,2SC Short Circ. Output Current 1.6 1 A A V A C 8137-04.TBL V 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 10A REF 2.5V OUT 1 7 a 50 2 REG Ce b RESET 5 + - + 2.5V 0.6V Figure 2 5.1V 4.9V 4.85V VOUT LOW RESET TD TD 3/5 8137-04.EPS 8137-03.EPS TDA8137 CIRCUIT DESCRIPTION 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 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), 10A then the reset output goes high again. To avoid glitches in the reset output, the second comparator "b" has a large hysteresis (1.9V). VIN1 1 7 V O1 V O2 TDA8137 2 6 C1 Ce 4 5 3 C2 C3 RESET DISABLE 8137-05.EPS . C1 . C3 = 10F 4/5 TDA8137 PACKAGE MECHANICAL DATA 9 PINS - PLASTIC HEPTAWATT L L1 M1 A C D1 E L2 L3 L5 H3 Dia. PM-HEPTV.EPS L6 Dimensions 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. H2 L7 F1 F G1 G2 G M D 2.4 1.2 0.35 0.6 2.41 4.91 7.49 10.05 16.97 14.92 21.54 22.62 2.6 15.1 6 2.8 5.08 3.65 2.54 5.08 7.62 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. Inches Typ. 0.094 0.047 0.014 0.024 0.095 0.193 0.295 0.396 0.668 0.587 0.848 0.891 0.100 0.200 0.300 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 3 15.8 6.6 0.102 0.594 0.236 0.110 0.200 0.118 0.622 0.260 HEPTV.TBL 3.85 0.144 0.152 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 5/5 |
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