参数资料
型号: LT3758EDD#PBF
厂商: Linear Technology
文件页数: 3/36页
文件大小: 0K
描述: IC REG CTRLR BST FLYBK INV 10DFN
标准包装: 121
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
电源电压: 5.5 V ~ 100 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 10-WFDFN 裸露焊盘
包装: 管件
产品目录页面: 1340 (CN2011-ZH PDF)
LT3758/LT3758A
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at T A = 25°C. V IN = 24V, SHDN /UVLO = 24V, SENS E = 0V, unless otherwis e noted.
PARAMETER
V IN Operating Range
V IN Shutdown I Q
V IN Operating I Q
V IN Operating I Q with Internal LDO Disabled
SENSE Current Limit Threshold
SENSE Input Bias Current
CONDITIONS
SHDN /UVLO = 0V
SHDN /UVLO = 1.15V
V C = 0.3V, R T = 41.2k
V C = 0.3V, R T = 41.2k, INTV CC = 7.5V
Current Out of Pin
l
MIN
5.5
100
TYP
0.1
1.75
350
110
–65
MAX
100
1
6
2.2
400
120
UNITS
V
μA
μA
mA
μA
mV
μA
Error Amplifier
FBX Regulation Voltage (V FBX(REG) )
FBX Overvoltage Lockout
FBX Pin Input Current
FBX > 0V (Note 3)
FBX < 0V (Note 3)
FBX > 0V (Note 4)
FBX < 0V (Note 4)
FBX = 1.6V (Note 3)
FBX = –0.8V (Note 3)
l
l
1.569
–0.816
6
7
–10
1.6
–0.800
8
11
70
1.631
–0.784
10
14
100
10
V
V
%
%
nA
nA
Transconductance g m (?I VC /?FBX)
V C Output Impedance
(Note 3)
(Note 3)
230
5
μS
V FBX Line Regulation (?V FBX /[?V IN ? V FBX(REG) ])
V C Current Mode Gain (?V VC /?V SENSE )
V C Source Current
V C Sink Current
FBX > 0V, 5.5V < V IN < 100V (Notes 3, 6)
FBX < 0V, 5.5V < V IN < 100V (Notes 3, 6)
V C = 1.5V
FBX = 1.7V
FBX = –0.85V
0.006
0.005
5.5
–15
12
11
0.025
0.03
%/V
%/V
V/V
μA
μA
μA
Oscillator
Switching Frequency
RT Voltage
R T = 41.2k to GND, FBX = 1.6V
R T = 140k to GND, FBX = 1.6V
R T = 10.5k to GND, FBX = 1.6V
FBX = 1.6V
270
300
100
1000
1.2
330
kHz
kHz
kHz
V
Minimum Off-Time
Minimum On-Time
SYNC Input Low
SYNC Input High
1.5
220
220
0.4
ns
ns
SS Pull-Up Current
SS = 0V, Current Out of Pin
–10
μA
Low Dropout Regulator
INTV CC Regulation Voltage
INTV CC Undervoltage Lockout Threshold
Falling INTV CC
UVLO Hysteresis
l
7
4.3
7.2
4.5
0.5
7.4
4.7
V
V
V
INTV CC Overvoltage Lockout Threshold
17.5
V
INTV CC Current Limit
INTV CC Load Regulation (?V INTVCC / V INTVCC )
INTV CC Line Regulation (?V INTVCC / [?V IN ? V INTVCC ])
Dropout Voltage (V IN – V INTVCC )
V IN = 100V
V IN = 20V
0 < I INTVCC < 10mA, V IN = 8V
8V < V IN < 100V
V IN = 6V, I INTVCC = 10mA
11
–1
16
50
–0.4
0.005
500
22
0.02
mA
mA
%
%/V
mV
3758afd
3
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