参数资料
型号: LTC3850IGN#PBF
厂商: Linear Technology
文件页数: 38/38页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 28-SSOP
产品培训模块: LTC3850 Dual Output DC/DC Switching Regulator Controller
标准包装: 49
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
频率 - 最大: 860kHz
占空比: 97.2%
电源电压: 4 V ~ 30 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: 28-SSOP(0.154",3.90mm 宽)
包装: 管件
LTC3850/LTC3850-1
TYPICAL APPLICATION
2.55k
1nF
7.5k
20k
0.1μF
RUN
10k
RJK0305DPB
2.21k
L1
0.56μH
10μF
2x
+
V IN
7V TO 14V
180μF
0.1μF
220pF
2.2nF
SENSE1 – SENSE1 + RUN1 FREQ
TK/SS1
MODE SW1 TG1
BOOST1
0.1μF
CMDSH-3
RJK0301DPB
2.74k
20k
I TH1
V FB1
V FB2
LTC3850
BG1
V IN
INTV CC
2.2
I TH2 BG2
PGND
TK/SS2
SENSE2 – BOOST2
SENSE2 + SGND RUN2 I LIM EXTV CC PGOOD SW2 TG2
4.7μF
CMDSH-3
0.1μF
1μF
RJK0305DPB
L2
0.56μH
100μF
2x
+
V OUT
1.1V/30A
C OUT1
330μF
2.5V
4x
0.1μF
RJK0301DPB
20k
PGOOD
100k
2.21k
RUN
L1, L2: VISHAY IHLP4040DZ-01 0.56μH
C OUT : SANYO 2R5TPE330M9
FOR SINGLE OUTPUT, DUAL PHASE OPERATION, TIE THE FOLLOWING PINS TOGETHER:
V FB1 TO V FB1 TK/SS1 TO TK/SS2
ITH1 TO ITH2 RUN1 TO RUN2
Figure 21. 1.1V/30A Dual Phase Core Converter, F SW = 400kHz
RELATED PARTS
38501 TA04
PART NUMBER DESCRIPTION
COMMENTS
LTC1625/
LTC1775
LTC1735
LTC1778
LTC3727A-1
LTC3728
LTC3729
LTC3731
LTC3773
LTC3810
LTC3826
LTC3828
LTC3834/
LTC3834-1
LT3845
No R SENSE ? Current Mode Synchronous Step-Down Controllers
High Efficiency Synchronous Step-Down Switching Regulator
No R SENSE Wide Input Range Synchronous Step-Down Controller
Dual, 2-Phase Synchronous Controller
2-Phase 550kHz, Dual Synchronous Step-Down Controller
20A to 200A PolyPhase ? Synchronous Controllers
3-Phase, Single Output From 250kHz to 600kHz Synchronous
Step-Down Controller
Triple Output DC/DC Synchronous Controller
100V Current Mode Synchronous Step-Down Switching Controller
Low I Q , Dual, 2-Phase Synchronous Step-Down Controller
Dual, 2-Phase Synchronous Step-Down Controller with Tracking
Low I Q , Synchronous Step-Down Controller
Low I Q , High Voltage Single Output Synchronous Step-Down
DC/DC Controller
97% Efficiency, No Sense Resistor, 16-Pin SSOP
Programmable Fixed Frequency from 200kHz to 550kHz
Up to 97% Efficiency, 4V ≤ V IN ≤ 36V, 0.8V ≤ V OUT ≤ (0.9)(V IN ),
I OUT Up to 20A
Very Low Dropout; V OUT ≤ 14V, 4V ≤ V IN ≤ 36V
QFN and SSOP Packages, High Frequency for Smaller L and C
Expandable from 2-Phase to 12-Phase, Uses All Surface Mount
Components
0.6V ≤ V OUT ≤ 6V, 4.5V ≤ V IN ≤ 32V, I OUT ≤ 60A,
Integrated MOSFET Drivers
3-Phase Step-Down DC/DC Controller,
3.3V ≤ V IN ≤ 36V, Fixed Frequency 160kHz to 700kHz
0.8V ≤ V OUT ≤ 0.93V IN , 6.2V ≤ V IN ≤ 100V, No R SENSE
30μA I Q , 0.8V ≤ V OUT ≤ 10V, 4V ≤ V IN ≤ 36V
Up to Six Phases, 0.8V ≤ V OUT ≤ 7V, 4.5V ≤ V IN ≤ 28V
30μA I Q , 0.8V ≤ V OUT ≤ 10V, 4V ≤ V IN ≤ 36V
1.23V ≤ V OUT ≤ 36V, 4V ≤ V IN ≤ 60V, 120μA I Q
PolyPhase is a registered trademark of Linear Technology Corporation. No R SENSE is a trademark of Linear Technology Corporation.
38501fc
38 Linear Technology Corporation
(408) 432-1900 l FAX : (408) 434-0507 www.linear.com
1630 McCarthy Blvd., Milpitas, CA 95035-7417
l
LT 0311 REV C ? PRINTED IN USA
? LINEAR TECHNOLOGY CORPORATION 2007
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