lm2567m National Semiconductor Corporation, lm2567m Datasheet

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lm2567m

Manufacturer Part Number
lm2567m
Description
Lan Dc/dc Converter
Manufacturer
National Semiconductor Corporation
Datasheet
C 1995 National Semiconductor Corporation
LM2567
LAN DC DC Converter
General Description
The LM2567 DC DC converter is intended for use in LAN
applications as a power supply for the DP8392 Coaxial
Transceiver The converter may be operated from an input
voltage of 5V (
of
(typical) The few external components required for the con-
verter are completely specified within this datasheet
Protection features for the LM2567-based DC DC converter
include thermal and current limit Undervoltage lockout and
soft-start are incorporated to minimize the inrush current
during start-up
Typical Application
Connection Diagram and Ordering Information
b
9V for loads of up to 180 mA with an efficiency of 78%
g
10%) to 15V It provides an isolated output
24-Lead Surface Mount (M)
Top View
TL H 11731
DC-to-DC Converter for DP8392 Coaxial Transceiver
No internal connection
TL H 11731 – 2
Features
Y
Y
Y
Y
Y
Y
Y
Typical Applications
Y
Wide input voltage range 5V to 15V
Tight line regulation 0 5% (typ)
Output voltage tolerance
Few external components required
Surface-mount packaging
Fixed switching frequency of 52 kHz
Current-mode operation for improved transient re-
sponse
Power supply for DP8392 (LAN) coaxial transceiver
Isolated
b
See NS Package Number M24B
9V output for up to 180 mA load
Order Number LM2567M
g
5%
RRD-B30M115 Printed in U S A
November 1992
TL H 11731 – 1

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lm2567m Summary of contents

Page 1

... Current-mode operation for improved transient re- Y sponse Typical Applications Power supply for DP8392 (LAN) coaxial transceiver Y b Isolated 9V output for up to 180 mA load Order Number LM2567M See NS Package Number M24B TL H 11731 – 2 November 1992 11731 – 1 RRD-B30M115 Printed ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Output Switch Voltage Output Switch Current Power Dissipation Storage Temperature Range Lead Temperature (Soldering 10 sec ...

Page 3

Electrical Characteristics Specifications with standard type face are for T Range Unless otherwise specified V IN Symbol Parameter SWITCH PARAMETERS Switch DI SWITCH DV Transconductance COMP I Switch Leakage L Current V Switch Saturation SAT Voltage I NPN Switch CL ...

Page 4

Typical Performance Characteristics Supply Current vs Temperature Supply Current vs Switch Current Switch Saturation Voltage vs Switch Current Feedback Pin Bias Current vs Temperature Reference Voltage D Reference Voltage vs Temperature vs Supply Voltage Current Limit Current Limit Response vs ...

Page 5

LM2567 Block Diagram LM2567 DC-to-DC Converter in DP8392C Typical Application ( See Typical Application on Front Page of this Datasheet ) e Note pulse transformer L 100 mH Pulse Engineering (San Diego) Part No 64103 ...

Page 6

Auxiliary Circuits Regulator Shutdown Control from Totem-Pole Logic BZX84C2V7 (in SOT-23) available from Zetex and Phillips Partial regulator circuit shown Regulator Shutdown Control from Open-Collector Logic BZX84C2V7 (in SOT-23) available from Zetex and Phillips Partial regulator circuit shown Typical Performance ...

Page 7

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Page 8

... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications 0 300 Wide SO Package (M) Order Number LM2567M NS Package Number M24B 2 A critical component is any component of a life ...

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