参数资料
型号: LTC3569IUDC#PBF
厂商: Linear Technology
文件页数: 6/26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.
Buck1 Load Regulation
Buck2 Load Regulation
0.6
0.4
BUCK2, 3 OFF
0.6
0.4
BUCK1, 3 OFF
0.2
PULSE-SKIPPING
V IN = 5.5V
V IN = 4.5V
0.2
PULSE-SKIPPING
V IN = 5.5V
V IN = 4.5V
0.0
0.0
–0.2
V IN = 2.5V
V IN = 3.5V
–0.2
V IN = 2.5V
V IN = 3.5V
–0.4
–0.4
–0.6
0
0.2
0.4
0.6
0.8
1
1.2
–0.6
0
0.1
0.2
0.3
0.4
0.5
0.6
I LOAD (A)
Buck3 Load Regulation
3569 G13
I LOAD (A)
Line Regulation
3569 G14
0.6
0.4
0.2
0.0
–0.2
BUCK1, 2 OFF
PULSE-SKIPPING
0.15
0.10
0.05
0.00
–0.05
EACH BUCK TESTED INDIVIDUALLY
BUCK2 = 1.2V
BUCK1 = 1.8V
BUCK3 = 1.5V
–0.4
–0.6
0
V OUT3 = 1.5V
0.1 0.2
0.3
0.4
0.5
0.6
–0.10
–0.15
2
3
PULSE-SKIPPING MODE
I LOAD1 = 200mA
I LOAD2, 3 = 150mA
4 5 6
I LOAD (A)
3569 G15
V SUPPLY (V)
3569 G16
1000
100
FB Pin Leakage
V IN = 5.5V SLAVE
DETECTOR = 250nA
10000
1000
I QSD vs Temperature
V IN = 5.5V
10
100
1
I FB2,3
0.1
0.01
I FB1
10
1
0.001
0
1
2
3
4
5
6
0.1
–50
0
50
100
150
V FB (V)
3569 G17
TEMPERATURE (°C)
3569 G18
3569fd
6
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