MNLM1575-12-X Datasheet, PDF (1/14 Pages) National Semiconductor (TI) – SIMPLE SWITCHER 1A STEP-DOWN VOLTAGE REGULATOR

MNLM1575-12-X REV 0D1
MICROCIRCUIT DATA SHEET
Original Creation Date: 08/29/95
Last Update Date: 05/22/00
Last Major Revision Date: 08/29/95
SIMPLE SWITCHER(TM) 1A STEP-DOWN VOLTAGE REGULATOR
General Description
The LM1575 regulator is a monolithic integrated circuit that provides all the active
functions from a step-down (buck) switching regulator, capable of driving a 1A load with
excellent line and load regulation.
Requiring a minimum number of external components, this regulator is simple to use and
includes internal frequency compensation and a fixed-frequency oscillator.
The LM1575 offers a high-efficiency replacement for popular three-terminal linear
regulators. It substantially reduces the size of the heat sink, and in many cases no heat
sink is required.
A standard series of inductors optimized for use with the LM1575 are available from
several different manufacturers. This feature greatly simplifies the design of switch-mode
power supplies.
Other features include a guaranteed +4% tolerance on output voltage within specified input
voltage and output load conditions, and +10% on the oscillator frequency. External
shutdown is included, featuring 50uA (typical) standby current. The output switch includes
cycle-by-cycle current limiting, as well as thermal shutdown for full protection under
fault conditions.
Industry Part Number
LM1575-12
Prime Die
LM1575-12
Controlling Document
SEE FEATURES SECTION
NS Part Numbers
LM1575J-12-QML
LM1575K-12-QML
LM1575WG-12-QML
Processing
MIL-STD-883, Method 5004
Quality Conformance Inspection
MIL-STD-883, Method 5005
Subgrp Description
1
Static tests at
2
Static tests at
3
Static tests at
4
Dynamic tests at
5
Dynamic tests at
6
Dynamic tests at
7
Functional tests at
8A
Functional tests at
8B
Functional tests at
9
Switching tests at
10
Switching tests at
11
Switching tests at
Temp ( ^oC)
+25
+125
-55
+25
+125
-55
+25
+125
-55
+25
+125
-55
1