参数资料
型号: LTC3561EDD#PBF
厂商: Linear Technology
文件页数: 3/16页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 1A 8DFN
标准包装: 121
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.8 V ~ 5 V
输入电压: 2.63 V ~ 5.5 V
PWM 型: 电流模式
频率 - 开关: 最高 4MHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-WFDFN 裸露焊盘
包装: 管件
供应商设备封装: 8-DFN-EP(3x3)
产品目录页面: 1335 (CN2011-ZH PDF)
LTC3561
ELECTRICAL CHARACTERISTICS
Note 5: T J is calculated from the ambient T A and power dissipation P D
according to the following formula:
LTC3561EDD: T J = T A + (P D ? 43 ° C/W)
Note 6: Switch on-resistance is guaranteed by correlation to wafer level
measurements.
Note 8: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125 ° C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 7: 4MHz operation is guaranteed by design but not production tested
and is subject to duty cycle limitations (see Applications Information).
TYPICAL PERFOR A CE CHARACTERISTICS
V OUT
Switching Waveforms
100
95
Efficiency vs V IN
I OUT = 0.4A
V OUT
Load Step
10mV/
DIV
90
I OUT = 1.0A
100mV/
DIV
85
80
I L1
100mA/
DIV
75
70
I L1
0.4A/
DIV
V IN = 3.3V 2 μ s/DIV
V OUT = 2.5V
3561 G02.eps
65
V OUT = 2.5V
CIRCUIT OF FIGURE 6
V IN = 3.3V 40 μ s/DIV
V OUT = 2.5V
3561 G06.eps
I LOAD = 50mA
CIRCUIT OF FIGURE 6
60
2.5
3.0
3.5
4.0 4.5
V IN (V)
5.0
5.5
6.0
I LOAD = 0.20A TO 1A
CIRCUIT OF FIGURE 6
3561 G05
0.4
Load Regulation
0.50
Line Regulation
10
Frequency vs V IN
0.3
0.2
V IN = 3.3V
V OUT = 2.5V
0.45
0.40
V OUT = 1.8V
T A = 25 ° C
8
6
V OUT = 1.8V
I OUT = 1A
T A = 25 ° C
0.1
0
0.35
0.30
0.25
4
2
0
–0.1
–0.2
–0.3
–0.4
–0.5
0.20
0.15
0.10
0.05
0
I OUT = 1.0A
I OUT = 400mA
–2
–4
–6
–8
–10
1
10 100 1000
10000
2
3
4
5
6
2
3
4
5
6
LOAD CURRENT (mA)
3561 G07
V IN (V)
3561 G08
V IN (V)
3561 G09
3561f
3
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