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LT3462ES6 Datasheet(PDF) 6 Page - Linear Technology

Part # LT3462ES6
Description  Inverting 1.2MHz/2.7MHz DC/DC Converters with Integrated Schottky in ThinSOT
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3462ES6 Datasheet(HTML) 6 Page - Linear Technology

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LT3462/LT3462A
3462af
6
TYPICAL APPLICATIO S
Li+ to –8V Supply
–12V Efficiency
LOAD CURRENT (mA)
0
80
75
70
65
60
55
50
3462 TA02b
10
520
15
25
35
30
TA = 25°C
VIN = 3.3V
3.3V to –12V with Soft-Start Circuit
VIN
3.3V
L1
47
µH
L2
47
µH
R1
267k
R2
27.4k
C3
2.2
µF
CS1
100nF
22nF
C4
15pF
C1
4.7
µF
C2
1
µF
VOUT
–12V
30mA
VIN
SW
FB
SDREF
GND
LT3462
C1: TAIYO YUDEN X5R JMK212BJ475MG
C2: TAIYO YUDEN X5R EMK212BJ105MG
C3: TAIYO YUDEN EMK316BJ225
L1, L2: MURATA LQH32CN470
3462 TA02a
OFF
M1
D
VIN
2.7V
TO 4.2V
L1A
22
µH
L1B
22
µH
R1
267k
R2
42.2k
C3
4.7
µF
C4
15pF
C1
4.7
µF
C2
1
µF
VOUT
–8V
VIN
SW
FB
SDREF
GND
LT3462
C1: TAIYO YUDEN X5R JMK212BJ475MG
C2: TAIYO YUDEN X5R EMK212BJ105MG
C3: TAIYO YUDEN LMK316BJ475
L1: SUMIDA CLS62-220 OR 2X MURATA LQH32CN330
3462 TA03a
D
LOAD CURRENT (mA)
0
3462 TA03b
20
30
10
40
50
80
75
70
65
60
55
50
TA = 25°C
VIN = 3.3V
–8V Efficiency
2ms/DIV
IIN
100mA/DIV
OFF
VOUT
10V/DIV
3462 TA02c
VOUT Reaches –12V in 750µs; Input
Current Peaks at 300mA without CS1
VOUT Reaches –12V in 7.5ms; Input
Current Peaks at 125mA with CS1 = 100nF
2ms/DIV
IIN
50mA/DIV
OFF
VOUT
10V/DIV
3462 TA02d


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