参数资料
型号: LT1766IGN#TR
厂商: Linear Technology
文件页数: 6/30页
文件大小: 0K
描述: IC REG BUCK ADJ 1.5A 16SSOP
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: 1.2 V ~ 54 V
输入电压: 5.5 V ~ 60 V
PWM 型: 电流模式
频率 - 开关: 200kHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
供应商设备封装: 16-SSOP
其它名称: LT1766IGNTR
LT1766/LT1766-5
TYPICAL PERFORMANCE CHARACTERISTICS
Switch Peak Current Limit
FB Pin Voltage and Current
SHDN Pin Bias Current
2.5
T A = 25°C
1.234
2.0
250
CURRENT REQUIRED TO FORCE SHUTDOWN
1.229
200
(FLOWS OUT OF PIN). AFTER SHUTDOWN,
2.0
TYPICAL
1.224
1.5
150
CURRENT DROPS TO A FEW μA
VOLTAGE
1.219
1.0
100
1.5
GUARANTEED MINIMUM
1.214
CURRENT
0.5
12
AT 2.38V STANDBY THRESHOLD
(CURRENT FLOWS OUT OF PIN)
1.209
6
1.0
0
20
40
60
80
100
1.204
–50 –25
0
25
50
75
0
100 125 150
0
–50 –25
0
25
50
75 100 125 150
DUTY CYCLE (%)
Lockout and Shutdown
Thresholds
1766 G01
JUNCTION TEMPERATURE (°C)
Shutdown Supply Current
1766 G02
JUNCTION TEMPERATURE (°C)
Shutdown Supply Current
1766 G03
2.4
40
V SHDN = 0V
300
T A = 25°C
2.0
LOCKOUT
35 T A = 25°C
30
250
V IN = 60V
1.6
1.2
0.8
0.4
START-UP
25
20
15
10
5
200
150
100
50
V IN = 15V
SHUTDOWN
0
–50 –25
0
25
50
75
100 125 150
0
0
10
20
30
40
50
60
0
0
0.1 0.2 0.3 0.4
0.5
JUNCTION TEMPERATURE (°C)
1766 G04
Error Ampli?er Transconductance
INPUT VOLTAGE (V)
Error Ampli?er Transconductance
1766 G05
SHUTDOWN VOLTAGE (V)
Frequency Foldback
1766 G06
2500
2000
1500
3000
2500
2000
T A = 25°C
PHASE
GAIN
200
150
100
600
500
400
T A = 25°C
(
V FB 2 ? 10
1000
1500
–3
)
R OUT
200k
V C
C OUT
12pF
50
300
200
SWITCHING
FREQUENCY
500
1000
ERROR AMPLIFIER EQUIVALENT CIRCUIT
0
100
0
–50 –25
0
25
50
75
100 125 150
500
100
R LOAD = 50Ω
1k
10k 100k
1M
–50
10M
0
0
0.5
1.0
FB PIN
CURRENT
1.5
JUNCTION TEMPERATURE (°C)
1766 G07
FREQUENCY (Hz)
1766 G08
V FB (V)
1766 G09
1766fc
6
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