参数资料
型号: LTC3838IFE#PBF
厂商: Linear Technology
文件页数: 46/54页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 38TSSOP
标准包装: 50
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
频率 - 最大: 2MHz
电源电压: 4.5 V ~ 38 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: 38-TFSOP (0.173",4.40mm 宽)裸露焊盘
包装: 管件

LTC3838
TYPICAL APPLICATIONS
V IN
4.5V TO 38V
+
C IN1
100μF
C IN2
10μF
3
2.2Ω
1μF
V IN
LTC3838
SENSE1 –
SENSE2 –
15k
0.1μF
0.1μF
15k
0.1μF
SENSE1 +
SENSE2 +
0.1μF
3.57k
BOOST1
BOOST2
3.57k
V OUT1
L1
0.56μH
MT1
DB1
TG1
TG2
DB2
MT2
L2
0.56μH
V OUT2
1.2V
15A
C OUT1
100μF
2
+
C OUT2
330μF
2
MB1
2.2Ω
1μF
4.7μF
SW1
DRV CC1
INTV CC
BG1
SW2
DRV CC2
EXTV CC
BG2
MB2
C OUT4 +
330μF
2
C OUT3
100μF
2
1.5V
15A
PGND
10k
10k
V OUTSENSE1+
V FB2
15k
10k
100k
PGOOD1
0.01μF
V OUTSENSE1–
PGOOD1
PGOOD2
PGOOD2
0.01μF
100k
22pF
40.2k
220pF
TRACK/SS1 TRACK/SS2
ITH1 ITH2
220pF
22pF
40.2k
C IN1 : NICHICON UCJ1H101MCL165
C IN2 : MURATA GRM32ER71H106K
C OUT2 , C OUT4 : SANYO 2R5TPE330M9
C OUT1 , C OUT3 : MURATA GRM31CR60J107ME39L
DB1, DB2: DIODES INC. SDM10K45
L1, L2: TOKO FDA1055-R56M
MT1, MT2: INFINEON BSC093N04LSG
115k
DTR1
V RNG1
RT
DTR2
V RNG2
PHASMD
3838 F16a
MB1, MB2: INFINEON BSC035N04LSG
SGND
RUN1
MODE/PLLIN
CLKOUT
RUN2
100
FORCED CONTINUOUS MODE
2.5
100
FORCED CONTINUOUS MODE
3.0
DISCONTINUOUS MODE
DISCONTINUOUS MODE
90
80
2.0
90
80
2.5
2.0
70
EFFICIENCY
POWER
1.5
70
EFFICIENCY
POWER
LOSS
1.5
LOSS
1.0
60
60
1.0
50
40
0.1
1
V IN = 12V
V OUT = 1.2V
10
0.5
0
50
40
0.1
1
V IN = 12V
V OUT = 1.5V
10
0.5
0
LOAD CURRENT (A)
3838 F16b
LOAD CURRENT (A)
3838 F16c
Figure 16. 4.5V to 38V Input, 1.2V/15A and 1.5V/15A Dual Output, 350kHz, DCR Sense, Step-Down Converter
3838fa
46
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