参数资料
型号: LTC3523EUD-2#TRPBF
厂商: Linear Technology
文件页数: 4/16页
文件大小: 0K
描述: IC REG BUCK BOOST SYNC ADJ 16QFN
标准包装: 2,500
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 2
输出电压: 0.62 V ~ 5.5 V
输入电压: 1.8 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 2.4MHz
电流 - 输出: 400mA,600mA
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: 16-WFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 16-QFN-EP(3x3)
LTC3523/LTC3523-2
TYPICAL PERFORMANCE CHARACTERISTICS (T A = 25°C unless otherwise noted)
1.00125
1.00000
Normalized FBx Reference vs
Temperature
1.05
Normalized Oscillator Frequency
vs Temperature
V OUT_BST
2V/DIV
Inrush Current Control for the
Step-Up Converter
I L_BST
200mA/DIV
0.99875
0.99750
1.00
SHDN1
2V/DIV
0.99625
V OUT = 3.3V
V IN = 2.4V
C OUT = 10μF
L1 = 4.7μH
200μs/DIV
3523 G03
0.99500
–45
–25
–5
15 35 55
75
0.95
–45
–25
–5
15 35 55
75
TEMPERATURE (°C)
Inrush Current Control for the
3523 G01
TEMPERATURE (°C)
3523 G02
Load Transient Response
V OUT_BCK
1V/DIV
I L_BCK
200mA/DIV
SHDN2
2V/DIV
Step-Down Converter
OUTPUT
RIPPLE
20mV/DIV
LOAD
CURRENT
20mA/DIV
Load Transient Response Step-Up
OUTPUT
RIPPLE
20mV/DIV
LOAD
CURRENT
20mA/DIV
Step-Down
V OUT = 1.2V
V IN = 2.4V
C OUT = 10μF
L1 = 4.7μH
200μs/DIV
3523 G04
V OUT = 3.3V
V IN = 2.4V
C OUT = 10μF
L1 = 4.7μH
500μs/DIV
3523 G05
V OUT = 1.2V
V IN = 2.4V
C OUT = 47μF
L1 = 4.7μH
500μs/DIV
3523 G06
20mA TO 70mA STEP
C F = 68pF
10mA TO 30mA STEP
1.2
Current Limit vs Temperature
0.80
R DS(ON) vs Input Voltage for the
Step-Down Converter
0.50
R DS(ON) vs Output Voltage for the
Step-Up Converter
1.0
0.8
0.6
0.4
BOOST CURRENT
LIMIT
BUCK CURRENT
LIMIT
0.70
0.60
0.50
0.40
0.30
PMOS
NMOS
0.45
0.40
0.35
0.30
0.25
0.20
0.15
PMOS
NMOS
0.2
0.20
0.10
0.10
0.05
0
–45
–25
–5 15
35
55
75
0
1
1.5
2
2.5
3
3.5
4
4.5
5
0
1
1.5
2
2.5
3
3.5
4
4.5
5
TEMPERATURE (°C)
3523 G07
INPUT VOLTAGE (V)
3523 G08
OUTPUT VOLTAGE (V)
3532 G09
3523fb
4
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