参数资料
型号: LTC3408EDD#PBF
厂商: Linear Technology
文件页数: 3/12页
文件大小: 0K
描述: IC REG BUCK W/BYPASS TXRX 8-DFN
标准包装: 121
应用: 转换器,WCDMA 功率放大器应用
输入电压: 2.5 V ~ 5 V
输出数: 1
输出电压: 0.3 V ~ 3.5 V
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
供应商设备封装: 8-DFN-EP(3x3)
包装: 管件
LTC3408
ELECTRICAL CHARACTERISTICS
Note 4: When V REF > 1.2V and V REF x3 > V IN , the P-channel FET will be on
in parallel with the bypass PFET reducing the overall R DS(ON) .
Note 5: 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.
TYPICAL PERFOR A CE CHARACTERISTICS
(From Figure 1)
Efficiency vs V OUT
Efficiency vs Output Current
Efficiency vs Output Current
T A = 25 ° C
110
T A = 25 ° C
V IN = 3.6V
100
90 V OUT = 1.2V
100
90
T A = 25 ° C
V OUT = 1.5V
100
90
80
100mA
600mA
80
70
60
50
V IN = 3.6V
V IN = 4.2V
80
70
60
50
V IN = 3.6V
V IN = 4.2V
40
40
70
60
30
20
10
30
20
10
50
0
1
2
3
4
0
0.1
1
10 100
1000
0
0.1
1
10 100
1000
V OUT (V)
Efficiency vs Output Current
3408 G02
OUTPUT CURRENT (mA)
Oscillator Frequency
vs Temperature
3408 G03
OUTPUT CURRENT (mA)
Oscillator Frequency
vs Supply Voltage
3408 G04
100
90
80
70
60
50
T A = 25 ° C
V OUT = 2.5V
V IN = 3.6V
V IN = 4.2V
1.70
1.65
1.60
1.55
1.50
V IN = 3.6V
1.8
1.7
1.6
1.5
T A = 25 ° C
40
1.45
30
20
10
1.40
1.35
1.4
1.3
0
0.1
1
10 100
1000
1.30
–50 –25
0
25
50
75
100
125
1.2
2
3 4 5
6
OUTPUT CURRENT (mA)
3408 G05
TEMPERATURE ( ° C)
3408 G06
SUPPLY VOLTAGE (V)
3408 G07
3408f
3
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