参数资料
型号: LTC3569IUDC#PBF
厂商: Linear Technology
文件页数: 7/26页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ TRPL 20QFN
标准包装: 91
类型: 降压(降压)
输出类型: 可调式
输出数: 3
输出电压: 0.43 V ~ 5.5 V
输入电压: 2.5 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 2.25MHz,1MHz ~ 3MHz
电流 - 输出: 600mA,1.2A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-WFQFN 裸露焊盘
包装: 管件
供应商设备封装: 20-QFN(3x4)
LTC3569
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
Load Step Cross Talk, Pulse-Skipping,
V IN = 3.6V, CH1 = V OUT1 , CH2 = V OUT2 ,
CH3 = V OUT3 , CH4 = I LOAD1
Load Step Cross Talk, Pulse-Skipping,
V IN = 3.6V, CH1 = V OUT1 , CH2 = V OUT2 ,
CH3 = V OUT3 , CH4 = I LOAD2
CH1
310mV P-P
CH2
16.8mV P-P
CH3
12mV P-P
CH4
1.2A
20μs/DIV
3569 G19
100mV/DIV
20mV/DIV
20mV/DIV
500mA/DIV
CH1
9.6mV P-P
CH2
246mV P-P
CH3
8mV P-P
CH4
600mA
20μs/DIV
3569 G20
20mV/DIV
100mV/DIV
20mV/DIV
500mA/DIV
Load Step Cross Talk, Pulse-Skipping,
V IN = 3.6V, CH1 = V OUT1 , CH2 = V OUT2 ,
CH3 = V OUT3 , CH4 = I LOAD3
I SW Leakage vs V SUPPLY Buck 1
CH1
11.6mV P-P
CH2
11.2mV P-P
CH3
266mV P-P
20mV/DIV
20mV/DIV
100mV/DIV
10000
1000
100
10
1
V IN = 3.6V
V FB = 0.9V
BUCK2, BUCK3 OFF
85°C
CH4
600mA
20μs/DIV
3569 G21
500mA/DIV
0.1
0.01
25°C
–50°C
0.001
0
1
2
3
3.6
V SW (V)
3569 G22
Soft-Start Into Heavy Load, PS, V IN =
3.6V, CH1 = V OUT1 , CH2 = V OUT2 , CH3
= V OUT3 , CH4 = I IN , R2 = PGOOD
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R2
2V/DIV
CH4
500mA/DIV
Soft-Start Into Light Load, PS, V IN =
3.6V, CH1 = V OUT1 , CH2 = V OUT2 , CH3
= V OUT3 , CH4 = I IN , R3 = PGOOD
CH1 500mV/DIV
CH3 500mV/DIV
CH2 500mV/DIV
R3
2V/DIV
CH4
50mA/DIV
400μs/DIV
3569 G23
400μs/DIV
3569 G24
3569fd
7
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