LT1308B Linear Technology, LT1308B Datasheet - Page 8

• Manufacturer Part Number: LT1308B
• Description: High Current/ Micropower Single Cell/ 600kHz DC/DC Converters
• Manufacturer: Linear Technology

PACKAGE
RELATED PARTS
PART NUMBER
LTC
LTC1174
LT1302
LT1304
LT1307
LT1316
LTC1440/1/2
LTC1516
LT1521
LT1308
8
TYPICAL
**
(0.203 – 0.254)
*
0.008 – 0.010
®
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
1163
(0.254 – 0.508)
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417 [phone]
FAX: [phone] TELEX: 499-3977 www.linear-tech.com
0.010 – 0.020
TO 6V
1.6V
100 F
V
IN
APPLICATION
C1
0.016 – 0.050
0.406 – 1.270
DESCRIPTION
Triple High Side Driver for 2-Cell Inputs
Micropower Step-Down DC/DC Converter
High Output Current Micropower DC/DC Converter
2-Cell Micropower DC/DC Converter
Single Cell Micropower 600kHz PWM DC/DC Converter
Micropower DC/DC Converter with Programmable Peak
Current Limit
Ultralow Power Single/Dual Comparators with Reference
2-Cell to 5V Regulated Charge Pump
Micropower Low Dropout Linear Regulator
+
DESCRIPTION
C1, C2, C3 = AVX TPS
C4, C5 = AVX TAJ
C6 = CERAMIC
1nF
45
C8
0 – 8 TYP
R4
47k
C7
22nF
SHDN
V
2-4 Cell to 3.3V/175mA, 5V/175mA, 18V/10mA, – 10V/10mA
V
C
IN
U
8
LT1308
U
(1.346 – 1.752)
N = 1
10 H
GND
D1, D2 = IR10BQ015
D3, D4 = BAT-85
L1 = COILTRONICS CTX02-13973
L1A
0.053 – 0.069
8-Lead Plastic Small Outline (Narrow 0.150)
(0.355 – 0.483)
0.014 – 0.019
Dimensions in inches (millimeters) unless otherwise noted.
1
SW
FB
100k
10 F
C6
R1
Digital Camera Power Supply
(LTC DWG # 05-08-1610)
2
2.08M
N = 0.3
340k
L1C
R3
R2
S8 Package
3
3
4
L1B
N = 0.7
100 F
C2
(1.270)
COMMENTS
1.8V Minimum Input, Drives N-Channel MOSFETs
94% Efficiency, 130 A I
5V/600mA from 2V, 2A Internal Switch, 200 A I
Low-Battery Detector Active in Shutdown, 5V at 200mA for 2 Cells
3.3V at 75mA from 1 Cell, MSOP Package
Works with High Source Impedance, 1.5V Minimum Input, Low-Battery
Detector Active in Shutdown, 33 A I
2.8 A I
12 A I
500mV Dropout, 300mA Current, 12 A I
0.050
BSC
+
(0.101 – 0.254)
0.004 – 0.010
D1
Q
Q
, No Inductors, 5V at 50mA from 3V Input
, Adjustable Hysteresis
+
D2
C3
100 F
3.3V
175mA
(5.791 – 6.197)
0.228 – 0.244
5V
175mA
Q
, 9V to 5V at 300mA
6
7
6
5
L1E
N = 2
L1D
N = 3.5
8
1
D3
D4
Q
(4.801 – 5.004)
0.189 – 0.197*
LINEAR TECHNOLOGY CORPORATION 1998
, MSOP Package
+
+
7
2
Q
1308i LT/TP 0198 4K • PRINTED IN USA
C4
10 F
C5
10 F
CCD BIAS
18V
10mA
CCD BIAS
–10V
10mA
6
3
Q
5
4
1308 TA01
(3.810 – 3.988)
0.150 – 0.157**
SO8 0695