参数资料
型号: LT3757MPMSE#TRPBF
厂商: Linear Technology
文件页数: 8/36页
文件大小: 0K
描述: IC REG CTRLR PWM CM 10-MSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
电源电压: 2.9 V ~ 40 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -55°C ~ 125°C
封装/外壳: 10-TFSOP,10-MSOP(0.118",3.00mm 宽)裸露焊盘
包装: 带卷 (TR)
LT3757/LT3757A
BLOCK DIAGRAM
L1
C DC
D1
V IN
R4
9
R3
+
C IN
10
L2
?
FBX
R2 +
R1
V OUT
C OUT2
C OUT1
2.5V
I S1
2μA
A10
+
SHDN /UVLO
1.22V
V IN
C C2
C C1
R C
1
V C
1.72V
–0.88V
+
+
A11
A12
I S3
G6
2.5V
I S2
10μA
Q3
INTERNAL
REGULATOR
AND UVLO
UVLO
G4 G3
TSD
165?C
VC
A7
+
A9
A8
+
G5
CURRENT
17.5V LIMIT
7.2V LDO
2.7V UP
2.6V DOWN
DRIVER
SR1
G2
R
O
S
INTV CC
GATE
8
7
C VCC
M1
Q2
PWM
COMPARATOR
+
FBX
2
FBX
1.6V
–0.8V
+
A1
+
A2
1.25V
SLOPE V ISENSE
RAMP
RAMP
GENERATOR
A6
+
A5
108mV
SENSE
6
GND
11
R SENSE
A3
G1
100kHz-1MHz
OSCILLATOR
R5
8k
FREQUENCY
FOLDBACK
D3
D2
FREQ
FOLDBACK
1.25V
+
+
A4
FREQ
PROG
Q1
SS
SYNC
RT
3
C SS
5
4
R T
3757 F01
Figure 1. LT3757 Block Diagram Working as a SEPIC Converter
3757afd
8
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