参数资料
型号: LTC1702IGN#TRPBF
厂商: Linear Technology
文件页数: 36/36页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 24-SSOP
标准包装: 2,500
系列: PolyPhase®
PWM 型: 电压模式
输出数: 2
频率 - 最大: 750kHz
占空比: 93%
电源电压: 3 V ~ 7 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 24-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC1702
TYPICAL APPLICATIO N
Low Cost Dual Supply with 2.5V Keepalive
V IN
5V
± 10%
10 ?
+
C IN
1 μ F
IN OUT
LT1761
16.2k
BG2
STBY/ON
10k
0.1%
1k
1k
68k
QSS1
4.75k +
0.1%
330pF
QSS2
10 μ F
56pF
0.1 μ F
V CC PV CC
FB2 BOOST2
COMP2
RUN/SS2
RUN/SS1
LTC1702
TG2
SW2
I MAX2
FAULT
47k
MBR0530T
QT2 1 μ F
QB2
GND ADJ
L2
MBR0530T
0.1%
16.9k
0.1%
+
C OUT2
V OUT2
2.5V/7A
2.45V/100mA
STANDBY
BOOST1
20k
1%
56k
16k
1%
220pF
39pF
FB1
COMP1
FCB
TG1
SW1
BG1
I MAX1
33k
QT1B
QB1B
QT1A
QB1A
1 μ F
L1
+
C OUT1
V OUT1
1.8V
20A
SGND
PGND
1702 TA04
C IN = SANYO 10MV1200GX (6 IN PARALLEL)
C OUT1 = SANYO 6MV1500GX (8 IN PARALLEL)
C OUT2 = SANYO 6MV1500GX (3 IN PARALLEL)
L1: 1 μ H SUMIDA CEP125-1R0MC-H
L2: 2.2 μ H COILTRONICS UP2B-2R2
RELATED PARTS
QSS1, QSS2: MOTOROLA MMBT3904LT1
QT1A, QT1B, QB1A, QB1B: FAIRCHILD FDS6670A
QT2, QB2: 1/2 SILICONIX Si4966
No R SENSE Current Mode Synchronous Step-Down Controller
PART NUMBER
LTC1530
LTC1625
LTC1628
DESCRIPTION
High Power Synchronous Step-Down Controller
TM
Dual High Efficiency 2-Phase Synchronous Step-Down Controller
COMMENTS
SO-8 with Current Limit. No R SENSE Required
Above 95% Efficiency, Needs No R SENSE , 16-Lead SSOP Package
Fits SO-8 Footprint
Constant Frequency, Standby 5V and 3.3V LDOs, 3.5V ≤ V IN ≤ 36V
LTC1703
Dual 550kHz Synchronous 2-Phase Switching Regulator Controller LTC1702 with 5-Bit Mobile VID for Mobile Pentium ? Processor
with Mobile VID Systems
LTC1706-81
LTC1709
LTC1736
LTC1753
LTC1873
LTC1929
VID Voltage Programmer
2-Phase, 5-Bit Desktop VID Synchronous Step-Down Controller
Synchronous Step-Down Controller with 5-Bit Mobile VID Control
5-Bit Desktop VID Programmable Synchronous
Switching Regulator
Dual Synchronous Switching Regulator with 5-Bit Desktop VID
2-Phase, Synchronous High Efficiency Converter
Adds 5-Bit Mobile VID to 0.8V Referenced Switching
Regulators
Current Mode, V IN to 36V, I OUT Up to 42A
Fault Protection, PowerGood, 3.5V to 36V Input, Current Mode
1.3V to 3.5V Programmable Output Using Internal 5-Bit DAC
1.3V to 3.5V Programmable Core Output Plus I/O Output
Current Mode Ensures Accurate Current Sensing,
V IN Up to 36V, I OUT Up to 40A
No R SENSE is a trademark of Linear Technology Corporation. Pentium is a registered trademark of Intel Corporation.
1702fa
1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408)432-1900 ● FAX: (408) 434-0507      www.linear.com ●
36 Linear Technology Corporation
LT 0306 REV A ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 1999
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