参数资料
型号: LTC3861EUHE#PBF
厂商: Linear Technology
文件页数: 6/38页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 36-QFN
标准包装: 61
系列: PolyPhase®
PWM 型: 电压模式
输出数: 2
频率 - 最大: 2.1MHz
占空比: 91.5%
电源电压: 3 V ~ 5.5 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: 36-WFQFN 裸露焊盘
包装: 管件
LTC3861
TYPICAL PERFORMANCE CHARACTERISTICS
V RUN
5V/DIV
I L1
10A/DIV
I L2
10A/DIV
Start-Up Response
(2-Phase Using LTC4449)
RUN
5V/DIV
I LOAD
50A/DIV
Start-Up Transient Response
(4-Phase Using TDA21220
DrMOS)
Soft-Start Start-Up Response
(2-Phase Using D12S1R845A
Power Block)
V OUT
1V/DIV
INTERNAL
SOFT-START
V OUT
500mV/DIV
INTERNAL
SOFT-START
V OUT
200mV/DIV
500μs/DIV
3861 G10
500μs/DIV
3861 G11
5ms/DIV
3861 G12
V IN = 12V
V OUT = 1.2V
R LOAD = 70m
f SW = 300kHz
V IN = 12V
V OUT = 1V
R LOAD = 0.016
f SW = 500kHz EXTERNAL CLOCK
V IN = 12V
V OUT = 1.2V
0.1μF CAPACITOR ON TRACK/SS1
f SW = 400kHz
Coincident Tracking (Single
Phase Using FDMF6707B DrMOS)
3.3V TRACKING
SIGNAL
V OUT
500mV/DIV
Ratiometric Tracking (Single
Phase Using FDMF6707B DrMOS)
3.3V TRACKING
SIGNAL
V OUT
500mV/DIV
I L
10A/DIV
PWM
2V/DIV
V OUT
500mV/DIV
Start-Up Response Into a 300mV
Prebiased Output (Single Phase
Using FDMF6707B DrMOS)
2ms/DIV
3861 G13
2ms/DIV
3861 G14
200μs/DIV
3861 G15
V IN = 12V
V OUT = 1.8V
f SW = 500kHz EXTERNAL CLOCK
V IN = 12V
V OUT = 1.8V
f SW = 500kHz EXTERNAL CLOCK
V IN = 12V
V OUT = 1.8V
f SW = 500kHz EXTERNAL CLOCK
I L
10A/DIV
PWM
2V/DIV
V OUT
500mV/DIV
Initial 7-Cycle Nonsynchronous
Start-Up (Single Phase Using
FDMF6707B DrMOS)
PWM
2V/DIV
V OUT
500mV/DIV
TRACK/SS
500mV/DIV
I L
20A/DIV
Start-Up Into a Short (Single
Phase Using FDMF6707B DrMOS)
PWM
2V/DIV
TRACK/SS
200mV/DIV
V OUT
500mV/DIV
I L
20A/DIV
128-Cycle Overcurrent Counter
(Single Phase Using FDMF6707B
DrMOS)
5μs/DIV
3861 G16
10ms/DIV
3861 G17
50μs/DIV
3861 G18
V IN = 12V
V OUT = 1.8V
300mV PREBIASED OUTPUT
f SW = 500kHz EXTERNAL CLOCK
V IN = 12V
V OUT = 1.8V
f SW = 500kHz EXTERNAL CLOCK
V IN = 12V
V OUT = 1.8V
f SW = 500kHz EXTERNAL CLOCK
6
For more information www.linear.com/LTC3861
3861fa
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