L4938E STMicroelectronics, L4938E Datasheet
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L4938E
Specifications of L4938E
497-3914-5
497-3914-5
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L4938E Summary of contents
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... DIP (12+2+2) February 1999 ADVANCED VOLTAGE REGULATOR DIP (12+2+2) 2% WITH 400mA DESCRIPTION The L4938E/ED/EPD is a monolithic integrated dual voltage regulator with two very low dropout outputs and additional functions as power-on re- FUNCTION FOR set and input voltage sense designed for supplying the microcomputer controlled systems especially in automotive applications ...
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... L4938E - L4938ED - L4938EPD ABSOLUTE MAXIMUM RATINGS Symbol V DC Operating Supply Voltage INDC V Transient Operating Supply Voltage (T < 400ms) INTR I Output Current O V Sense Input Voltage (Voltage Forced) (note Sense Input Current (Current Forced) (note Enable Input Voltage (Voltage Forced) (note 2) EN ...
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... OUT2 I = 400mA; V OUT2 400mA OUT1 (after regulation setting) V02 = 0 100mA; I OUT1 OUT2 28V 1mA 5mA, O2 (after regulation setting) L4938E - L4938ED - L4938EPD DIP 12+2+2 SO 12+4+4 PowerSO20 <2 Function Min. Typ. 4.9 5 4.8 5 0.1 = 4.8V 0.2 100 200 28V; 4.9 ...
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... L4938E - L4938ED - L4938EPD ELECTRICAL CHARACTERISTICS (Continued) Symbol Parameter ENABLE INPUT V Enable Input Low Voltage ENL (Output 2 Active) V Enable Input High Voltage ENH V Enable Hysteresis ENhyst I Enable Input Current Low EN LOW I Enable Input Current High EN HIGH RESET CIRCUIT V Reset Theresold Voltage RT (note4) ...
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... BZX97C15 PR SI FUNCTIONAL DESCRIPTION The L4938E/ED/EPD is a monolithic integrated dual voltage regulator, based on the STM modu- lator voltage regulator approach. Several out- standing features and auxiliary functions are im- plemented to meet the requirements of supplying microprocessor systems in automotive applica- tions. Nevertheless suitable also in other ap- plications where two stabilized voltages are re- quired ...
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... L4938E - L4938ED - L4938EPD Connecting a resistor divider R OUT2 pin the output voltage 2 can be pro- grammed to the value OUT2 OUT1 R with R = 60K to 150K and V ADJ 5.05V. For an exact calculation the temperature coeffi- cient (Tc -2000pprm) of the internal resistor (R ) must be taken into account. Pin ADJ in this ...
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... Figure 3. Reset Generator REF 1.23V 17K 74K PR VOUT1 REG Figure Low threshold V High threshold CT CT L4938E - L4938ED - L4938EPD OUT1 10...100K RES at 1 A=0.5V at 25˚C BE =1.4 D94AT081 7/12 ...
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... L4938E - L4938ED - L4938EPD INPUT PROTECTION The Inputs Enable (EN) and sense in(SI) are pro- Figure 5. Input Characteristics of SI, EN: 8/12 tected against negative transients. Figure 5 is showing the simplified schematic ...
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... MIN. a1 0.51 0.020 B 0.85 1.40 0.033 b 0.50 b1 0.38 0.50 0.015 D 20.0 E 8.80 e 2.54 e3 17.78 F 7.10 I 5.10 L 3.30 Z 1.27 inch MECHANICAL DATA TYP. MAX. 0.055 0.020 0.020 0.787 0.346 0.100 0.700 0.280 0.201 0.130 0.050 L4938E - L4938ED - L4938EPD OUTLINE AND Powerdip 16 9/12 ...
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... L4938E - L4938ED - L4938EPD mm DIM. MIN. TYP. MAX. MIN. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max 10/12 inch MECHANICAL DATA TYP ...
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... A e DETAIL BOTTOM VIEW PSO20MEC L4938E - L4938ED - L4938EPD OUTLINE AND MECHANICAL DATA JEDEC MO-166 PowerSO20 DETAIL A lead slug a3 DETAIL B 0.35 Gage Plane - SEATING PLANE (COPLANARITY 11/12 ...
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... L4938E - L4938ED - L4938EPD Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice ...