L4938N STMicroelectronics, L4938N Datasheet
L4938N
Specifications of L4938N
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L4938N Summary of contents
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... FOR PowerDIP (12+2+2) = 500mA 02 DESCRIPTION The L4938N is a monolithic integrated dual voltage regulators with two very low dropout outputs and ad- ditional functions such as power-on reset and input voltage sense. They are designed for supplying mi- crocomputer controlled systems specially in auto- motive applications. ...
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... L4938N - L4938ND - L4938NPD BLOCK DIAGRAM V S1 REFERENCE 1.23V RESET SI SENSE (optional) THERMAL DATA Symbol R Thermal Resistance Junction-Case thj-case R Thermal Resistance Junction-Ambient thj-amb 2/12 REG1 REG2 2 2.0V 1.23V Parameter Powerdip Max. Max. 1.23V D94AT143A PowerSO20 SO20 14 < 2 – 90 – ADJ CT RES SO GND ...
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... Note : The circuit is ESD protected according to MIL–STD–883C. APPLICATION CIRCUIT ESR < Parameter 0. > 0.3V) EN REFERENCE REG1 REG2 1.23V 2 RESET 1.23V SENSE (optional) at 10KHz L4938N - L4938ND - L4938NPD Value 28 40 –55 to 150 875 1.23V V O2 ADJ C CT RES R 2. GND D94AT144A Unit ...
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... L4938N - L4938ND - L4938NPD ELECTRICAL CHARACTERISTICS (V Symbol Parameter V Operating Supply Voltage S V Standby Output Voltage Output Voltage 2 Tracking Error O2 O1 (note 1) I ADJ Input Current ADJ V Dropout Voltage 1 DP1 V Input to Output Voltage IO1 Difference in Undervoltage Condition V Dropout Voltage 2 DP2 V Input to Output Voltage ...
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... Foldback characteristic FUNCTIONAL DESCRIPTION The L4938N is based on the STMicroelectronics modular voltage regulator approach. Several out- standing features and auxiliary functions are pro- vided to meet the requirements of supplying the mi- croprocessor systems used in automotive applica- tions ...
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... L4938N - L4938ND - L4938NPD Figure 1 : Output Voltage vs. Input Voltage. Figure 2 : Quiescent Current vs. Supply Voltage. 400 200 Figure 3 : Programmable Output 2 Voltage with External Resistors. 6/12 ...
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... T ings this feature is not used SI and SO have to con- nected to GND. In this case the St-by quiescent cur- rent (14V) increases from 290 A to 300 A. L4938N - L4938ND - L4938NPD . This time is typically equal 7/12 ...
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... L4938N - L4938ND - L4938NPD Figure 5 : Typical Reset Output Waveforms. 1.5V 8/12 ...
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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 L4938N - L4938ND - L4938NPD OUTLINE AND Powerdip 16 9/12 ...
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... L4938N - L4938ND - L4938NPD mm DIM. MIN. TYP. MAX. MIN. A 3.6 a1 0.1 0.3 0.004 a2 3 0.1 0.000 b 0.4 0.53 0.016 c 0.23 0.32 0.009 D (1) 15.8 16 0.622 D1 9.4 9.8 0.370 E 13.9 14.5 0.547 e 1.27 e3 11.43 E1 (1) 10.9 11.1 0.429 E2 2.9 E3 5.8 6.2 0.228 G 0 0.1 ...
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... H 10 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max inch MECHANICAL DATA TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 L4938N - L4938ND - L4938NPD OUTLINE AND SO20 h x 45˚ SO20MEC 11/12 ...
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... L4938N - L4938ND - L4938NPD Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the conse- quences 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 ...