参数资料
型号: LTC1771IS8#TRPBF
厂商: Linear Technology
文件页数: 4/16页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 8-SOIC
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
占空比: 100%
电源电压: 2.8 V ~ 18 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC1771
TYPICAL PERFOR A CE CHARACTERISTICS
Active Mode Quiescent Current
Sleep Quiescent Current
Load Regulation
vs Input Voltage
vs Input Voltage
0.4
FIGURE 1 CIRCUIT
200
12
0.2
Burst Mode OPERATION
T A = 100 ° C
10
T A = 100 ° C
0
–0.2
–0.4
DISABLED
Burst Mode
OPERATION
V IN = 15V
V IN = 5V
150
100
T A = –50 ° C
T A = 25 ° C
8
6
T A = 25 ° C
T A = –50 ° C
–0.6
–0.8
ENABLED
50
4
2
–1.0
0
0.5
1.0
1.5
2.0
0
0
2
4
6
8
10 12 14 16 18 20
0
0
2
4
6
8
10 12 14 16 18 20
LOAD CURRENT (A)
Shutdown Quiescent Current
vs Input Voltage
1771 G04
INPUT VOLTAGE (V)
1771 G05
Run/SS Current vs Input Voltage
INPUT VOLTAGE (V)
Current Sense Voltage
vs Temperature
1771 G06
8
5
200
V IN = 10V
6
T A = –50 ° C
4
3
T A = –50 ° C
150
100
MAXIMUM
4
2
T A = 25 ° C
2
1
T A = 25 ° C
T A = 100 ° C
50
0
BURST THRESHOLD
T A = 100 ° C
MINIMUM
0
0
2
4
6
8
10 12 14 16 18 20
0
0
2
4
6
8
10 12 14 16 18 20
–50
–50
–25
0 25 50
75
100
1.25
1.24
1.23
1.22
INPUT VOLTAGE (V)
Reference Voltage
vs Temperature
V IN = 10V
1771 G07
V OUT
100mV/DIV
INDUCTOR
CURRENT
1A/DIV
INPUT VOLTAGE (V)
1771 G08
Load Step Transient Response
V OUT
50mV/DIV
INDUCTOR
CURRENT
0.5A/DIV
TEMPERATURE ( ° C)
Burst Mode Operation
1771 G09
V IN = 10V 50 μ s/DIV
V OUT = 3.3V
1771 G11
V IN = 10V 10 μ s/DIV
V OUT = 3.3V
1771 G12
1.21
–50
–25
0 25 50
75
100
I LOAD = 100mA TO 2A
FIGURE 1 CIRCUIT
I LOAD = 100mA
FIGURE 1 CIRCUIT
TEMPERATURE ( ° C)
1771 G10
4
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