LT1945 Ver la hoja de datos (PDF) - Linear Technology
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LT1945 Datasheet PDF : 8 Pages
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LT1945
TYPICAL APPLICATIONS
Dual Output (±32V) Converter
VIN
2.7V
TO 5V
C1
4.7μF
L1
10μH
C4
0.1μF D1
8
10
VIN
2
SHDN1
SW1
1
NFB1
LT1945
D2
4
SHDN2
5
FB2
GND PGND PGND SW2
37 96
L2
10μH
4.7pF
D3
C1: TAIYO YUDEN JMK212BJ475 (408)573-4150
C2, C3: TAIYO YUDEN GMK316BJ105 (408)573-4150
C4: TAIYO YUDEN UMK212BJ104 (408)573-4150
D1, D2, D3: ZETEX ZHCS400
(631)543-7100
L1, L2: MURATA LQH3C100
(814)237-1431
100pF 604k
–32V
5mA
C2
1μF
24.9k
80.6k
2M
C3
1μF
32V
5mA
1945 TA02
Efficiency at VIN = 3.6V
80
75
70
65
60
55
50
0.1
+32V OUTPUT
–32V OUTPUT
1
LOAD CURRENT (mA)
10
1945 TA02a
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
Step-Up DC/DC Converter
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20μA, ISD = <1μA,
ThinSOT Package
LT1940
Dual Output 1.4A (IOUT), Constant 1.1MHz, High Efficiency
Step-Down DC/DC Converter
VIN = 3V to 25V, VOUT = 1.2V, IQ = 2.5mA, ISD = <1μA,
TSSOP-16E Package
LT1944
Dual Output 350mA ISW, Constant Off-Time, High Efficiency
Step-Up DC/DC Converter
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20μA, ISD = <1μA, MS Package
LT1944-1
Dual Output 150mA ISW, Constant Off-Time, High Efficiency
Step-Up DC/DC Converter
VIN = 1.2V to 15V, VOUT = 34V, IQ = 20μA, ISD = <1μA, MS Package
LT1949/LT1949-1 550mA ISW, 600kHz/1.1MHz, High Efficiency
Step-Up DC/DC Converter
VIN = 1.5V to 12V, VOUT = 28V, IQ = 4.5mA, ISD = <25μA,
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
LTC3402
LTC3423
1A ISW, 3MHz, Synchronous Step-Up DC/DC Converter
2A ISW, 3MHz, Synchronous Step-Up DC/DC Converter
1A ISW, 3MHz, Low VOUT, Synchronous Step-Up
DC/DC Converter
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38μA, ISD = <1μA, MS Package
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38μA, ISD = <1μA, MS Package
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38μA, ISD = <1μA, MS Package
LTC3424
2A ISW, 3MHz, Low VOUT, Synchronous Step-Up
DC/DC Converter
VIN = 0.5V to 5V, VOUT = 6V, IQ = 38μA, ISD = <1μA, MS Package
8
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
1945fa
LT 1208 REV A • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2001
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