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参数资料
| 型号： | LTC3548IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 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： | 400mA，800mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
LTC3548
TYPICAL PERFORMANCE CHARACTERISTICS
Oscillator Frequency
T A = 25°C unless otherwise speci?ed.
Oscillator Frequency
Ef?ciency vs Input Voltage
vs Temperature
vs Supply Voltage
100
95
90
100mA
10mA
2.5
2.4
V IN = 3.6V
10
8
6
4
85
1mA
2.3
2
80
75
800mA
2.2
0
–2
–4
70
65
V OUT = 1.8V, CHANNEL 1
Burst Mode OPERATION
2.1
–6
–8
60
2
CIRCUIT OF FIGURE 3
3
4
5
6
2.0
–50 –25
0
25
50
75
100
125
–10
2
3
4
5
6
INPUT VOLTAGE (V)
3548 G04
Reference Voltage vs Temperature
TEMPERATURE (°C)
R DS(ON) vs Input Voltage
3548 G05
SUPPLY VOLTAGE (V)
3548 G06
R DS(ON) vs Junction Temperature
0.615
0.610
V IN = 3.6V
500
450
T A = 25°C
550
500
450
V IN = 4.2V
V IN = 2.7V
V IN = 3.6V
0.605
0.600
400
350
MAIN
SWITCH
400
350
300
0.595
300
250
0.590
250
SYNCHRONOUS
SWITCH
200
150
MAIN SWITCH
0.585
–50 –25
0
25
50
75
100
125
200
1
2
3
4
5
6
7
100
–50 –25
SYNCHRONOUS SWITCH
0 25 50 75
100 125 150
100
TEMPERATURE (°C)
Ef?ciency vs Load Current
3548 G07
2.0
V IN (V)
Load Regulation
3548 G08
0.5
JUNCTION TEMPERATURE (°C)
Line Regulation
3548 G09
95
1.5
0.4
V OUT = 1.8V
I OUT = 200mA
90
Burst Mode OPERATION
1.0
Burst Mode OPERATION
0.3
0.2
T A = 25°C
85
0.5
0.1
80
0
PULSE-SKIPPING MODE
0
75
70
PULSE-SKIPPING MODE
–0.5
–1.0
–0.1
–0.2
65
V IN = 3.6V, V OUT = 1.8V
NO LOAD ON OTHER CHANNEL
–1.5
V IN = 3.6V, V OUT = 1.8V
NO LOAD ON OTHER CHANNEL
–0.3
–0.4
60
1
CHANNEL 1; CIRCUIT OF FIGURE 3
10 100 1000
–2.0
1
CHANNEL 1; CIRCUIT OF FIGURE 3
10 100 1000
–0.5
2
3
4
5
6
LOAD CURRENT (mA)
3548 G11
LOAD CURRENT (mA)
3548 G12
V IN (V)
3548 G15
3548fc
4
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