參數(shù)資料
型號(hào): LT3581IMSE#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: SWITCHING REGULATOR, PDSO16
封裝: LEAD FREE, PLASTIC, MSOP-16
文件頁(yè)數(shù): 26/36頁(yè)
文件大?。?/td> 498K
代理商: LT3581IMSE#PBF
LT3581
3581f
Typical applicaTions
1MHz, ±12V Charge Pump Topology Uses Only Single Inductor
VIN
5V
100k
130k
86.6k
C1
3.3F
2.2nF
3581 TA08a
0.1F
C4
10F
C5
10F
16.9k
VOUT+
12V
0.27A
VOUT
–12V
0.27A
C2
1F
SW1
SW2
FB
CLKOUT
GATE
VC
SS
VIN
RT
GND
SYNC
FAULT
SHDN
LT3581
100pF
C1: 3.3F, 25V, X7R, 1206
C2, C3: 1F, 25V, X7R, 1206
C4, C5: 10F, 50V, X7R, 1210
D1 TO D5: DIODES INC. PD3S230H-7
L1: VISHAY IHLP-2525CZ-01-8R2
R1: 2.4k, 2W
*IF DRIVING ASYMMMETRICAL LOADS,
PLACE A 2.4k, 2W RESISTOR FROM THE 12V
OUTPUT TO THE –12V OUTPUT FOR IMPROVED
LOAD REGULATION OF THE –12V OUTPUT
D2
D1
L1
8.2H
D3
C3
1F
D4
D5
R1
*2.4k
Efficiency and Power Loss with
Symmetric Load
700kHz, –5V Inverting Converter Can Accept Input Voltages from 3V to 16V
VIN
3V TO 16V
100k
60.4k
124k
C1
22F
2.2nF
3581 TA09a
0.1F
C3
22F
6.19k
VOUT
–5V
0.9A (VIN = 3.3V)
1.5A (VIN = 12V)
1.6A (VIN = 16V)
C2
1F
SW1
SW2
FB
CLKOUT
GATE
VC
SS
VIN
RT
GND
SYNC
FAULT
SHDN
LT3581
56pF
C1: 22F, 25V, X7R, 1210
C2: 1F, 50V, X7R, 1206
C3: 22F, 16V, X7R, 1210
D1: VISHAY SSB44
L1, L2: COILCRAFT MSD7342-332MLB
L2
3.3H
D1
L1
3.3H
Efficiency
LOAD CURRENT (mA)
0
50
EFFICIENCY
(%)
POWER
LOSS
(mW)
55
65
70
75
150
50
90
3581 TA08b
60
100
300
250
200
80
85
0
200
600
1800
1200
1400
1600
400
800
1000
LOAD CURRENT (mA)
0
50
EFFICIENCY
(%)
55
65
70
75
300
90
3581 TA09b
60
1800
900
1500
600
1200
80
85
VIN = 3.3V
VIN = 12V
VIN = 16V
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