STR-S6525
OFF-LINE
SWITCHING REGULATOR
FUNCTIONAL BLOCK DIAGRAM
V
IN
5
DRAIN
1
2
R
S
UVLO
OVER-VOLT.
PROTECT
FAULT
LATCH
SOURCE
2 kΩ
Q
SOFT
START
REF.
TSD
7
OSC.
TRIGGER
0.01 µF
R
toff
FAULT-LATCH
TRIGGER
R
OVER-CURRENT
PROTECTION
ton
8
9
3
+
0.75 V
1000 pF
0.01 µF
COMMON
6
4
FDBK
SYNC
Dwg. FK-002-1
ALLOWABLE PACKAGE POWER DISSIPATION
MAXIMUM SAFE OPERATING AREA
60
100
MOUNTING SURFACE
TEMPERATURE
54 W
t
= 0.1 ms SINGLE PULSE
w
30
10
LIMITED
BY r
DS(on)
t
= 1 ms SINGLE PULSE
RECOMMENDED MAX.
FRAME TEMP. = +100°C
w
40
3.0
1.0
INFINITE HEAT SINK
LIMITED BY FRAME
TEMP. = +125°C MAX.
20
NO HEAT SINK
NATURAL COOLING
T
= +25°C
A
FREE AIR
0.3
3.2 W
0.1
3.0
0
10
30
100
300
1000
140
20
60
100
DRAIN-TO-SOURCE VOLTAGE in VOLTS
TEMPERATURE in °C
Dwg. GK-003-2
Dwg. GK-004-4
™
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1994 Allegro MicroSystems, Inc.
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
