l4925l STMicroelectronics, l4925l Datasheet

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l4925l

Manufacturer Part Number
l4925l
Description
Very Low Drop Voltage Regulator
Manufacturer
STMicroelectronics
Datasheet
Features
Description
The L4925 is a monolithic integrated 5V voltage
regulator with a very low dropout output and
additional functions such as power-on reset and
programmable reset delay time.
Order codes
February 2006
Operating DC supply voltage range 6V to 28V
Transient supply voltage up to 40V
Extremely low quiescent current
High precision output voltage
Output current capability up to 500mA
Very low dropout voltage less than 0.6V
Reset circuit sensing the output voltage
Programmable reset pulse delay with external
capacitor
Thermal shutdown and short circuit protections
L4925PD013TR
Part number
L4925PD
L4925L
L4925
Pentawatt in Line
PowerSO20
PowerSO20
Pentawatt
Package
Very Low Drop Voltage Regulator
It is designed for supplying microcomputer
controlled systems especially in automotive
applications.
Pentawatt
Pentawatt in line
Tape & Reel
Packing
Tube
Tube
Tube
PowerSO20
L4925
www.st.com
Rev 6
1/15
15

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l4925l Summary of contents

Page 1

... The L4925 is a monolithic integrated 5V voltage regulator with a very low dropout output and additional functions such as power-on reset and programmable reset delay time. Order codes Part number L4925 L4925L L4925PD L4925PD013TR February 2006 Very Low Drop Voltage Regulator Pentawatt Pentawatt in line ...

Page 2

Contents 1 Block and Pin Connections diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Block diagram ...

Page 3

L4925 1 Block and Pin Connections diagrams 1.1 Block diagram Figure 1. Block diagram PREREGULATOR GND REG 1.2 Pin Connections diagrams 1.2.1 Pentawatt pin connections Figure 2. Pentawatt pin connections (top view) Vz VREF 5V 1.23V ...

Page 4

Block and Pin Connections diagrams 1.2.2 PowerSO20 pin connections Figure 3. PowerSo20 pin connections (top view) 1.3 Thermal data Table 1. Thermal data Symbol R Thermal Resistance Junction to ambient th(j-amb) R Thermal Resistance Junction to ambient th(j-amb) 4/15 ...

Page 5

L4925 2 Electrical specifications 2.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol V DC Operating Supply Voltage SDC V Transient Supply Voltage (t < 1s) STR I Output Current O V Output Voltage O V Output Voltage RES ...

Page 6

Electrical specifications Table 3. Electrical characteristics (continued) (V =14V –40 to 125°C unless otherwise specified Symbol Parameter I Quiescent Current Q RESET V Reset Threshold Voltage RT V Reset Threshold RTH t Reset Pulse Delay ...

Page 7

L4925 3 Functional description The L4925 is a monolithic integrated voltage regulator, based on the STM modular voltage regulator approach. Several outstanding features and auxiliary functions are implemented to meet the requirements of supplying microprocessor systems in automotive applications. Nevertheless, ...

Page 8

Functional description The quiescent current as a function of the supply input voltage is shown in Figure 5. Output voltage vs. input voltage 3.2 Reset circuit The block circuit diagram of the reset circuit is shown in the output ...

Page 9

L4925 Figure 8. 3 Functional description 9/15 ...

Page 10

Application information 4 Application information 4.1 Supply voltage transients High supply voltage transients can cause a reset output signal disturbance. For supply voltage greater than 8V the circuit shows a high immunity of the reset output against supply transients ...

Page 11

L4925 5 Package Informations Figure 10. Pentawatt Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX 2.40 D1 1.20 E 0.35 E1 0.76 F 0.80 F1 1.00 G 3.20 3.40 G1 6.60 6.80 H2 10.40 H3 ...

Page 12

Package Informations Figure 11. Pentawatt in Line Mechanical Data & Package Dimensions mm DIM. MIN. TYP 2.40 D1 1.20 E 0.35 E1 0.76 F 0.80 F1 1.00 G 3.20 3.40 G1 6.60 6. 10.05 ...

Page 13

L4925 Figure 12. PowerSO20 Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX 0 0.4 c 0.23 D (1) 15.8 D1 (2) 9.4 E 13.9 e 1.27 e3 11.43 E1 (1) 10.9 E2 ...

Page 14

Revision history 6 Revision history Date Revision October 2003 18-Nov-2005 03-Feb-2006 14/15 4 First issue in EDOCD DMS Added GND pins to fig Added order code and changed the formatting style in compliance with the new template ...

Page 15

... L4925 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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