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LQH3C4R7 Datasheet(PDF) 8 Page - Linear Technology

Part # LQH3C4R7
Description  Dual Micropower DC/DC Converter with Positive and Negative Outputs
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LQH3C4R7 Datasheet(HTML) 8 Page - Linear Technology

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LT1945
1945f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com
©LINEAR TECHNOLOGY CORPORATION 2001
LT/TP 0802 2K • PRINTED IN USA
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1613
550mA ISW, 1.4MHz, High Efficiency Step-Up DC/DC Converter VIN = 0.9V to 10V, VOUT = 34V, IQ = 3mA, ISD = <1µA,
ThinSOT Package
LT1615/LT1615-1
300mA ISW, Constant Off-Time, High Efficiency
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA,
Step-Up DC/DC Converter
ThinSOT Package
LT1940
Dual Output 1.4A (IOUT), Constant 1.1MHz, High Efficiency
VIN = 3V to 25V, VOUT = 1.2V, IQ = 2.5mA, ISD = <1µA,
Step-Down DC/DC Converter
TSSOP-16E Package
LT1944
Dual Output 350mA ISW, Constant Off-Time, High Efficiency
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA, MS Package
Step-Up DC/DC Converter
LT1944-1
Dual Output 150mA ISW, Constant Off-Time, High Efficiency
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20µA, ISD = <1µA, MS Package
Step-Up DC/DC Converter
LT1949/LT1949-1
550mA ISW, 600kHz/1.1MHz, High Efficiency
VIN = 1.5V to 12V, VOUT = 28V, IQ = 4.5mA, ISD = <25µA,
Step-Up DC/DC Converter
S8, MS8 Packages
LTC3400/LTC3400B 600mA ISW, 1.2MHz, Synchronous Step-Up DC/DC Converter
VIN = 0.85V to 5V, VOUT = 5V, IQ = 19µA/300µA, ISD = <1µA,
ThinSOT Package
LTC3401
1A ISW, 3MHz, Synchronous Step-Up DC/DC Converter
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package
LTC3402
2A ISW, 3MHz, Synchronous Step-Up DC/DC Converter
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package
LTC3423
1A ISW, 3MHz, Low VOUT, Synchronous Step-Up
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package
DC/DC Converter
LTC3424
2A ISW, 3MHz, Low VOUT, Synchronous Step-Up
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38µA, ISD = <1µA, MS Package
DC/DC Converter
Dual Output (
±32V) Converter
VIN
SW1
FB2
LT1945
4
3
L1
10
µH
D1
D2
SHDN2
24.9k
604k
C2
1
µF
–32V
5mA
VIN
2.7V
TO 5V
1945 TA02
GND
7
PGND
9
PGND
6
810
SW2
4.7pF
C1
4.7
µF
NFB1
2
5
1
SHDN1
L2
10
µH
D3
2M
80.6k
C3
1
µF
100pF
C1: TAIYO YUDEN JMK212BJ475
C2, C3: TAIYO YUDEN GMK316BJ105
C4: TAIYO YUDEN UMK212BJ104
D1, D2, D3: ZETEX ZHCS400
L1, L2: MURATA LQH3C100
32V
5mA
C4
0.1
µF
(408)573-4150
(408)573-4150
(408)573-4150
(631)543-7100
(814)237-1431
TYPICAL APPLICATIO
LOAD CURRENT (mA)
0.1
50
55
60
65
70
80
110
1945 TA02a
75
+32V OUTPUT
–32V OUTPUT
Efficiency at VIN = 3.6V


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