参数资料
型号: LT3508IUF#TRPBF
厂商: Linear Technology
文件页数: 26/26页
文件大小: 0K
描述: IC REG BUCK ADJ 1.4A DL 24QFN
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 2
输出电压: 0.8 V ~ 35.3 V
输入电压: 3.7 V ~ 36 V
PWM 型: 电流模式
频率 - 开关: 920kHz ~ 1.06MHz
电流 - 输出: 1.4A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 24-WFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 24-QFN 裸露焊盘(4x4)

LT3508
TYPICAL APPLICATION
5V, 1.8V Output from PCI Express
V IN
12V
R9
40.2k
C1
4.7μF
V IN1
V IN2
D2
C2
4.7μF
V IN2
3.3V
R10
D1
SHDN
14.7k
OUT1
L1 6.8μH
C3
0.1μF
BOOST1
BOOST2
C4
0.1μF
L2
3.3μH
OUT2
5V
SW1
SW2
1.8V
0.9A
R1
D3
LT3508
D4
R2
1.4A
52.3k
FB1
FB2
18.7k
R3
10k
C6
10μF
R5
43k
C9
100pF
C8
0.047μF
V C1 V C2
TRACK/SS1 PG1
TRACK/SS2 PG2
GND RT/SYNC
R6
47k
R4
15.0k
R7
100k
C5
47μF
C10
0.047μF
R8
33.2k
C7
330pF
C1 TO C6: X5R OR X7R
D1, D2: MMSD4148
f SW = 1MHz
3508 TA05
POWER
GOOD
D3: DIODES INC. B140
D4: DIODES INC. B120
RELATED PARTS
PART NUMBER
LT1765
LT1766
LT1767
LT1940/LT1940L
LTC3407
LT3493
LT3501/LT3510
LT3506/LT3506A
LTC3701
LTC3736
LTC3737
DESCRIPTION
25V, 2.75A (I OUT ), 1.25MHz, High Ef?ciency Step-Down
DC/DC Converter
60V, 1.2A (I OUT ), 200kHz, High Ef?ciency Step-Down
DC/DC Converter
25V, 1.2A (I OUT ), 1.25MHz, High Ef?ciency Step-Down
DC/DC Converter
Dual Monolithic 1.4A, 1.1MHz Step-Down Switching
Regulators
Dual 600mA, 1.5MHz, Synchronous Step-Down
Regulator
1.2A, 750kHz Step-Down Switching Regulator in
2mm × 3mm DFN
Dual 3A/2A, 1.5MHz High Ef?ciency Step-Down
Switching Regulators
Dual Monolithic 1.6A, 1.1MHz Step-Down Switching
Regulators
Two Phase, Dual, 500kHz, Constant Frequency, Current
Mode, High Ef?ciency Step-Down DC/DC Controller
Dual Two Phase, No R SENSE ?, Synchronous Controller
with Output Tracking
Dual Two Phase, No R SENSE DC/DC Controller with
Output Tracking
COMMENTS
V IN : 3V to 25V, V OUT(MIN) = 1.2V, I Q = 1mA, S8, TSSOP16E Packages
V IN : 5.5V to 60V, V OUT(MIN) = 1.2V, I Q = 2.5mA, TSSOP16/TSSOP16E
Packages
V IN : 3V to 25V, V OUT(MIN) = 1.2V, I Q = 1mA, MS8, MS8E Packages
V IN : 3.6V to 25V, V OUT(MIN) = 1.25V, I Q = 3.8mA, TSSOP16E Packages
V IN : 2.5V to 5.5V, V OUT(MIN) = 0.6V, I Q = 40μA, MSE Package
V IN : 3.6V to 36V, V OUT(MIN) = 0.78V, I Q = 1.9mA, 2mm × 3mm DFN Package
V IN : 3.6V to 25V, V OUT(MIN) = 0.8V, I Q = 3.7mA, I SD < 10μA,
TSSOP20E Package
V IN : 3.6V to 25V, V OUT(MIN) = 0.8V, I Q = 3.8mA, 16-Lead DFN and 16-Lead
TSSOPE Packages
V IN : 2.5V to 10V, V OUT(MIN) = 0.8V, I Q = 460μA, SSOP-16 Package
V IN : 2.75V to 9.8V, V OUT(MIN) = 0.6V, I Q = 300μA, 4mm × 4mm QFN or
SSOP-24 Packages
V IN : 2.75V to 9.8V, V OUT(MIN) = 0.6V, I Q = 220μA, 4mm × 4mm QFN or
SSOP-24 Packages
3508fd
1630  McCarthy  Blvd.,  Milpitas,  CA  95035-7417 (408)432-1900 ● FAX: (408) 434-0507     www.linear.com ●
26 Linear Technology Corporation
LT 0811 REV D ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2007
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