参数资料
型号: LT3990HMSE-5#PBF
厂商: Linear Technology
文件页数: 6/22页
文件大小: 0K
描述: IC REG BUCK ADJ 0.35A 16MSOP
标准包装: 37
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 1.21 V ~ 25 V
输入电压: 4.2 V ~ 62 V
PWM 型: 电流模式,Burst Mode?
频率 - 开关: 210kHz ~ 2.3MHz
电流 - 输出: 350mA
同步整流器:
工作温度: -40°C ~ 150°C
安装类型: 表面贴装
封装/外壳: 16-TFSOP(0.118",3.00mm 宽)裸露焊盘
包装: 管件
供应商设备封装: 16-MSOP,裸露焊盘
LT3990/LT3990-3.3/LT3990-5
TYPICAL PERFORMANCE CHARACTERISTICS T A = 25°C, unless otherwise noted.
5.0
4.5
4.0
Minimum Input Voltage,
V OUT = 3.3V
FRONT PAGE APPLICATION
V OUT = 3.3V
TO START
TO RUN
6.5
6.0
5.5
Minimum Input Voltage,
V OUT = 5V
FRONT PAGE APPLICATION
f = 600kHz
TO START
TO RUN
1.2
1.0
0.8
0.6
Boost Diode Forward Voltage
3.5
5.0
0.4
3.0
2.5
0
50
100
150
200
250
300
350
4.5
4.0
0
50
100
150
200
250
300
350
0.2
0
0
50 100 150
–50°C
25°C
125°C
150°C
200
LOAD CURRENT (mA)
Catch Diode Forward Voltage
3990 G19
LOAD CURRENT (mA)
Catch Diode Leakage
3990 G20
BOOST DIODE CURRENT (mA)
Power Good Threshold
3990 G21
1.0
0.8
0.6
15
12
8
V R = 12V
92
91
90
0.4
6
0.2
0
0
100 200 300
CATCH DIODE CURRENT (mA)
–50°C
25°C
125°C
150°C
400
3
0
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
89
88
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
1.240
1.215
1.190
EN/UVLO Threshold
3990 G22
V OUT
100mV/DIV
I L
100mA/DIV
3990 G23
Transient Load Response; Load
Current is Stepped from 10mA
(Burst Mode Operation) to 110mA
V OUT
100mV/DIV
I L
100mA/DIV
3990 G24
Transient Load Response; Load
Current is Stepped from 100mA
to 200mA
1.165
1.140
–50 –25
0
25 50
75 100 125 150
100μs/DIV
FRONT PAGE APPLICATION
V IN = 12V
V OUT = 5V
3990 G26
100μs/DIV
FRONT PAGE APPLICATION
V IN = 12V
V OUT = 5V
3990 G27
TEMPERATURE (°C)
3990 G25
3990fa
6
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