LT1239
TYPICAL APPLICATIONS
NiCd Backup System with 20mA Charge Current
50Ω
IN 1
MAIN
BATTERY
PACK
OUT 1
650k
5µF
SHDN1
IN2
SHDN2
ADJ
I
MON1
LT1239
E/A (IN)
E/A (0UT)
OUT2
5V
IN
5V POWER
SYSTEM
GND
I
MON2
+
+
10µF
MEMORY
POWER
MONITORING
CIRCUITRY
LT1239 • TA02
PACKAGE DESCRIPTION
0.010 – 0.020
×
45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
0° – 8° TYP
0.016 – 0.050
0.406 – 1.270
RELATED PARTS
PART NUMBER
LT1111
LT1120A
LT1121
LTC 1232
LTC1325
LTC1443/LTC1444/LTC1445
LT1510
®
DESCRIPTION
Micropower DC/DC Converter with Adjustable or Fixed 5V or 12V Output
Micropower Regulator and Comparator with Shutdown
Micropower Regulator with Shutdown
Microprocessor Supervisory Circuit
Microprocessor-Controlled Battery Management System
Quad Micropower Comparators with Reference
Programmable PWM Battery Charger with 2A Peak Current Capability
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
q
FAX
: (408) 434-0507
q
TELEX
: 499-3977
U
U
NiCd Backup System with 5mA Trickle Charge
IN 1
OUT 1
ADJ
NiCd
BACKUP
BATTERIES
+
10µF
750k
6V NiCd
BACKUP
BATTERY
MAIN
BATTERY
PACK
+
5µF
SHDN1
IN2
SHDN2
+
10µF
I
MON1
LT1239
E/A (IN)
E/A (0UT)
OUT 2
+
165k
1µF
+
10µF
MEMORY
POWER
MONITORING
CIRCUITRY
5V POWER
SYSTEM
5V
IN
GND
I
MON2
LT1239 • TA03
Dimension in inches (millimeters) unless otherwise noted.
S Package
16-Lead Plastic DIP
0.386 – 0.394*
(9.804 – 10.008)
16
15
14
13
12
11
10
9
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157*
(3.810 – 3.988)
1
0.053 – 0.069
(1.346 – 1.752)
2
3
4
5
6
7
8
0.004 – 0.010
(0.101 – 0.254)
0.014 – 0.019
(0.355 – 0.483)
0.050
(1.270)
TYP
SO16 0893
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006 INCH (0.15mm).
COMMENTS
Low-Battery Detector
20µA Supply Current
0.4V Dropout Voltage at 150mA
Minimum External Components
Charges Battery and Provides Gas Gauge
6µA Quiescent Current
Charges NiCd, NiMH
LT/GP 0695 10K • PRINTED IN USA
©
LINEAR TECHNOLOGY CORPORATION 1995
LINER [ LINEAR TECHNOLOGY ]
