参数资料
型号: LTC3543EDCB#TRPBF
厂商: Linear Technology
文件页数: 3/20页
文件大小: 0K
描述: IC REG BUCK SYNC ADJ 0.6A 8DFN
标准包装: 2,500
类型: 降压(降压)
输出类型: 可调式
输出数: 1
输出电压: 0.6 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
电流 - 输出: 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: 8-WFDFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 8-DFN(3x2)
LTC3543
ELECTRICAL CHARACTERISTICS
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula: T J = T A + (P D )(64°C/W)
Note 4 : The LTC3543 is tested in a proprietary test mode that connects
V FB to the output of the error ampli?er. This test mode is equivalent to
continuous mode operation.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise noted. (From Figure 1a)
Ef?ciency vs Input Voltage (V IN )
Ef?ciency vs Load Current
Ef?ciency vs Load Current
100
90
I OUT = 200mA
100
V IN = 2.7V
90 Burst Mode OPERATION
80 ENABLED
100
Burst Mode OPERATION
90 ENABLED
80
80
I OUT = 600mA
70
V IN = 4.2V
70
V IN = 4.2V
60
60
70
I OUT = 10mA
50
40
V IN = 3.6V
50
40
V IN = 3.6V
60
30
30
50
20
10
20
10
V IN = 2.7V
40
V OUT = 1.8V
2.5 3.0
3.5 4.0 4.5
5.0
5.5
0
0.1
1
V OUT = 1.2V
10 100 1000
0
0.1
1
V OUT = 1.5V
10 100 1000
INPUT VOLTAGE (V)
Power Loss vs Load Current
3543 G01
LOAD CURRENT (mA)
Ef?ciency vs Load Current
3543 G02
LOAD CURRENT (mA)
Ef?ciency vs Load Current
3543 G03
500
400
V OUT = 1.2V
V OUT = 1.5V
V OUT = 1.8V
V OUT = 2.5V
100
Burst Mode OPERATION
90 ENABLED
80
100
Burst Mode OPERATION
90 ENABLED
80
300
200
70
60
50
40
V IN = 4.2V
V IN = 3.6V
70
60
50
40
V IN = 4.2V
V IN = 3.6V
30
30
100
0
20
10
0
V IN = 2.7V
V OUT = 1.8V
20
10
0
V IN = 2.7V
V OUT = 2.5V
0.1
1
10 100
1000
0.1
1
10 100
1000
0.1
1
10 100
1000
LOAD CURRENT (mA)
3543 G04
LOAD CURRENT (mA)
3543 G05
LOAD CURRENT (mA)
3543 G06
3543fa
3
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