参数资料
型号: LT3759IMSE#PBF
厂商: Linear Technology
文件页数: 8/32页
文件大小: 0K
描述: IC REG CTRLR BST INV PWM 12-MSOP
标准包装: 37
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
电源电压: 1.6 V ~ 42 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 12-TSSOP (0.118",3.00mm 宽)裸露焊盘
包装: 管件
LT3759
BLOCK DIAGRAM
L1
C DC
D1
V IN
R4
R3
+
C IN
L2
?
FBX
R2
R1
+
C OUT1
C OUT2
V OUT
12
EN/UVLO
11
V IN
10
DRIVE
2.5V
I S1
2μA
A10
+
1.22V
VC
I S3
2.5V
I S2
10μA
BANDGAP
REFERENCE
BG
INTERNAL BIAS
GENERATOR
CURRENT
LIMIT
CURRENT
LIMIT
UVLO
C C2
R C
C C1
1
1.72V
–0.86V
+
+
A11
A12
G6
Q3
G4
V C
BG_LOW
INTERNAL BIAS
A8
TSD
~165?C
A7
G5
+
1.2V
R
V IN LDO
SR1
Q
S
G2
DRIVE LDO
DRIVER
INTV CC
GATE
9
8
C VCC
M1
+
+
FBX
2
6
FBX
PGOOD
1.6V
–0.8V
A1
A2
Q2
PWM
COMPARATOR
SLOPE V ISENSE
RAMP
RAMP
GENERATOR
A6
A5
+
+
50mV
SENSE
7
GND
13
R SENSE
1.52V
Q4
A13
G8
A15
+
2.7V
100kHz ~ 1MHz
OSCILLATOR
+
A14
G7
1.25V
A3
G1
–0.76V
+
FREQUENCY
FOLDBACK
FREQ
FOLDBACK
1.25V
+
+
A4
Q1
FREQ
PROG
3
SS
5
SYNC
4
RT
3759 F01
C SS
R T
Figure 1. LT3759 Block Diagram Working as a SEPIC Converter
3759fc
8
For more information www.linear.com/3759
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