参数资料
型号: LTC3425EUH#PBF
厂商: Linear Technology
文件页数: 5/24页
文件大小: 0K
描述: IC REG BOOST SYNC ADJ 5A 32QFN
标准包装: 73
类型: 升压(升压)
输出类型: 可调式
输出数: 1
输出电压: 2.4 V ~ 5.25 V
输入电压: 0.5 V ~ 4.5 V
PWM 型: 电流模式,混合
频率 - 开关: 100kHz ~ 2MHz
电流 - 输出: 5A
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: 32-WFQFN 裸露焊盘
包装: 管件
供应商设备封装: 32-QFN 裸露焊盘(5x5)
LTC3425
TYPICAL PERFOR A CE CHARACTERISTICS
Converter Efficiency
for V OUT = 3.3V
Converter Efficiency
for V OUT = 5V
Converter Efficiency for 2-, 3- and
4-Phase Operation
T A = 25 ° C
100
90
80
70
60
50
40
V IN = 2.4V
V IN = 1.2V
V IN = 2.4V
V IN = 1.2V
100
90
80
70
60
50
40
V IN = 3.3V
V IN = 2.4V
V IN = 3.3V
V IN = 2.4V
98
96 V IN = 2.4V
V OUT = 3.3V
94 1MHz/PHASE
92
90
88
4 PHASE
30
20
30
20
86
84
2 PHASE
3 PHASE
10
T A = 25 ° C
0
0.1 1
Burst Mode OPERATION
1MHz/PHASE
10 100 1000 10000
10
T A = 25 ° C
0
0.1 1
Burst Mode OPERATION
1MHz/PHASE
10 100 1000 10000
82
80
100
1000
10000
OUTPUT CURRENT (mA)
3425 G11
Efficiency Comparison of
Discontinuous Mode and Forced
Continuous Mode at Light Loads
for V IN = 2.4V, V OUT = 3.3V
OUTPUT CURRENT (mA)
3425 G12
Efficiency Comparison of
Discontinuous Mode and Forced
Continuous Mode at Light Loads
for V IN = 3.3V, V OUT = 5V
LOAD (mA)
3425 G13
Converter No Load Input Current
vs V IN (Burst Mode Operation)
T A = 25 ° C
T A = 25 ° C
100
90 1MHz/PHASE
80 DISCONTINUOUS
MODE
70
100
90 1MHz/PHASE
80
DISCONTINUOUS
70 MODE
140
120
100
T A = 25 ° C
60
50
40
30
FORCED
CONTINUOUS
MODE
60
50
40
30
FORCED
CONTINUOUS
MODE
80
60
40
V OUT = 5V
V OUT = 3.3V
20
20
10
0
10
0
20
0
1
10 100 1000
1
10
100
1000
1.5
2.0
2.5
3.0
3.5
4.0
4.5
CONVERTER OUTPUT CURRENT (mA)
3425 G14
Oscillator Frequency
LOAD (mA)
Peak Current Limit
3425 G15
V IN (V)
Effective R DS(ON)
3425 G16
10
T A = 25 ° C
1.8
T A = 25 ° C
0.065
T A = 25 ° C
1.6
1.4
0.060
PMOS
0.055
1.2
0.050
1.0
0.8
0.045
NMOS
1
1
10
R T (k ? )
100
0.6
60
80
100 120 140 160
I LIM RESISTOR (k ? )
180
200
0.040
2.5
3
3.5 4
V OUT (V)
4.5
5
3425 G17
3425 G18
3425 G19
3425f
5
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