参数资料
型号: LTC3731CG#TRPBF
厂商: Linear Technology
文件页数: 34/34页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 36-SSOP
标准包装: 2,000
系列: PolyPhase®
PWM 型: 电流模式
输出数: 1
频率 - 最大: 750kHz
占空比: 98.5%
电源电压: 4 V ~ 36 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 36-SSOP(0.209",5.30mm 宽)
包装: 带卷 (TR)
LTC3731
TYPICAL APPLICATION
1μF
10
V5
10nF
0.1μF
S1
SHORT
PLLFLTR TO
SGND
100pF
20k
0.01μF
100pF
3.01k
147k
S1 +
S1 –
S2 +
S2 –
S3 –
S3 +
V IN
V CC
1000pF
1000pF
1000pF
18k
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
I TH 17
18
12k
PLLIN PGOOD
PLLFLTR BOOST1
FCB TG1
IN + SW1
LTC3731G
IN – BOOST2
DIFFOUT TG2
EAIN SW2
SGND V DR
SENSE1 + BG1
SENSE1 – PGND
SENSE2 + BG2
SENSE2 – BG3
SENSE3 – SW3
SENSE3 + TG3
RUN/SS BOOST3
I TH PHASMD
UVADJ SGND
V CC CLK
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
PGOOD
47k
1
V5
0.1μF
1μF 10μF
0.1μF
V5
M1
M2
M3
M4
M5
M6
V5
5V TO 7V
V IN
L1
D1
V IN
L2
D2
V IN
L3
D3
0.003
+
0.003
S2 +
0.003
S3 +
S1 –
S2 –
S3 –
V OUT
5V AT 40A
47μF +
10V
× 3
4.7μF +
50V
× 6
C OUT
V IN
C IN 9V TO 28V
47μF
35V
× 4
3731 TA01
V IN : 9V TO 28V
V OUT : 5V AT 40A
SWITCHING FREQUENCY: 225kHz
RELATED PARTS
C IN : KEMET T521X476M035ATE070 × 4
C OUT : SANYO 6TPE220MI × 3
D1 TO D3: DIODES INC. B340A
L1 TO L3: 2.2μH WURTH 7443320220
M1, M3, M5: RJK0305DPB
M2, M4, M6: RJK0330DPB
PART NUMBER
LTC3829
LTC3856
LTC3855
LTC3860
DESCRIPTION
3-Phase, Single Output Synchronous Step-Down Controller with
Diff Amp and DCR Temperature Compensation
2-Phase, Single Output Synchronous Step-Down DC/DC Controller
with Diff Amp and DCR Temperature Compensation
Dual, Multiphase, Synchronous Step-Down DC/DC Controller with
Diffamp and DCR Temperature Compensation
Dual, Multiphase, Synchronous Step-Down DC/DC Controller with
Diffamp and Three-State Output Drive
COMMENTS
Phase-Lockable Fixed 250kHz to 770kHz Frequency,
4.5V ≤ V IN ≤ 38V, 0.8V ≤ V OUT ≤ 5V
Phase-Lockable Fixed 250kHz to 770kHz Frequency,
4.5V ≤ V IN ≤ 38V, 0.8V ≤ V OUT ≤ 5V
Phase-Lockable Fixed Frequency 250kHz to 770kHz,
4.5V ≤ V IN ≤ 38V, 0.8V ≤ V OUT ≤ 12V
Operates with Power Blocks or DRMOS Devices,
3V ≤ V IN ≤ 24V, t ON(MIN) = 20ns
LTC3853
Triple Output, Multiphase Synchronous Step-Down DC/DC Controller, Phase-Lockable Fixed 250kHz to 750kHz Frequency,
R SENSE or DCR Current Sensing and Tracking 4V ≤ V IN ≤ 24V, V OUT3 Up to 13.5V
LTC3869/LTC3869-2 Dual Output, 2-Phase Synchronous Step-Down DC/DC Controller,
with Accurate Current Share
PLL Fixed 250kHz to 750kHz Frequency,
4V ≤ V IN ≤ 38V, 0.6V ≤ V OUT ≤ 12.5V
3731fc
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX:(408)434-0507    www.linear.com ●
34 Linear Technology Corporation
LT 0711 REV C ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2005
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