参数资料
型号: LT1766IFE-5
厂商: Linear Technology
文件页数: 4/30页
文件大小: 0K
描述: IC REG BUCK 5V 1.5A 16TSSOP
标准包装: 95
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 5V
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-TSSOP(0.173",4.40mm)裸露焊盘
包装: 管件
供应商设备封装: 16-TSSOP-EP
LT1766/LT1766-5
ELECTRICAL CHARACTERISTICS
(LT1766E/LT1766I Grade)
The l denotes speci?cations which apply over the full operating temperature range, otherwise speci?cations are at T J = 25°C.
V IN = 15V, V C = 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
PARAMETER
Switch On-Resistance
CONDITIONS
I SW = 1.5A, Boost = V IN + 5V (Note 7)
l
MIN
TYP
0.2
MAX
0.3
0.4
UNITS
Ω
Ω
Maximum Switch Duty Cycle
FB = 1V or V SENSE = 4.1V
l
93
90
96
%
%
Switch Frequency
f SW Line Regulation
V C Set to Give DC = 50%
5.5V ≤ V IN ≤ 60V
l
l
184
172
200
200
0.05
216
228
0.15
kHz
kHz
%/V
f SW Frequency Shifting Threshold
Df = 10kHz
0.8
V
Minimum Input Voltage
Minimum Boost Voltage
Boost Current (Note 5)
Input Supply Current (I VIN )
Bias Supply Current (I BIAS )
Shutdown Supply Current
(Note 3)
(Note 4) I SW ≤ 1.5A
Boost = V IN + 5V, I SW = 0.5A
Boost = V IN + 5V, I SW = 1.5A
(Note 6) V BIAS = 5V
(Note 6) V BIAS = 5V
SHDN = 0V, V IN ≤ 60V, SW = 0V, V C Open
l
l
l
l
l
4.6
1.8
12
45
1.4
2.9
25
5.5
3
25
70
2.2
4.2
75
200
V
V
mA
mA
mA
mA
μA
μA
Lockout Threshold
Shutdown Thresholds
Minimum SYNC Amplitude
V C Open
V C Open, Shutting Down
V C Open, Starting Up
l
l
l
l
2.3
0.15
0.25
2.42
0.37
0.45
1.5
2.53
0.6
0.6
2.2
V
V
V
V
SYNC Frequency Range
SYNC Input Resistance
228
20
700
kHz
(LT1766H Grade)
The l denotes speci?cations which apply over the full operating temperature range, otherwise speci?cations are at T J = 25°C.
V IN = 15V, V C = 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Voltage (V REF )
FB Input Bias Current
Error Amp Voltage Gain
Error Amp g m
5.5V ≤ V IN ≤ 60V
V OL + 0.2 ≤ V C ≤ V OH – 0.2
(Notes 2, 9)
dl (V C ) = ±10μA (Note 9)
l
l
l
1.204
1.175
200
1500
900
1.219
–0.5
400
2000
1.234
1.265
–1.5
3000
4200
V
V
μA
V/V
μMho
μMho
V C to Switch g m
1.7
A/V
EA Source Current
EA Sink Current
FB = 1V or V SENSE = 4.1V
FB = 1.4V or V SENSE = 5.7V
l
l
125
100
225
225
400
450
μA
μA
V C Switching Threshold
V C High Clamp
Duty Cycle = 0
SHDN = 1V
0.9
2.1
V
V
Switch Current Limit
Switch On Resistance
Maximum Switch Duty Cycle
Switch Frequency
V C Open, Boost = V IN + 5V, FB = 1V or V SENSE = 4.1V
I SW = 0.75A, Boost = V IN + 5V (Note 7)
FB = 1V or V SENSE = 4.1V
V C Set to Give DC = 50%
l
l
l
l
0.75
93
90
184
135
2
0.2
96
200
200
3
0.3
0.8
216
228
A
Ω
Ω
%
%
kHz
kHz
1766fc
4
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