LT3758EDD データシートの表示（PDF） - Linear Technology
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LT3758EDD Datasheet PDF : 36 Pages
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LT3758/LT3758A
Electrical Characteristics The l denotes the specifications which apply over the full operating temp-
erature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN Operating Range
5.5
100
V
VIN Shutdown IQ
SHDN/UVLO = 0V
SHDN/UVLO = 1.15V
0.1
1
µA
6
µA
VIN Operating IQ
VC = 0.3V, RT = 41.2k
1.75
2.2
mA
VIN Operating IQ with Internal LDO Disabled
SENSE Current Limit Threshold
VC = 0.3V, RT = 41.2k, INTVCC = 7.5V
350
400
µA
l 100
110
120
mV
SENSE Input Bias Current
Current Out of Pin
–65
µA
Error Amplifier
FBX Regulation Voltage (VFBX(REG))
FBX > 0V (Note 3)
FBX < 0V (Note 3)
l 1.569 1.6 1.631
V
l –0.816 –0.800 –0.784
V
FBX Overvoltage Lockout
FBX > 0V (Note 4)
FBX < 0V (Note 4)
6
8
10
%
7
11
14
%
FBX Pin Input Current
FBX = 1.6V (Note 3)
FBX = –0.8V (Note 3)
70
100
nA
–10
10
nA
Transconductance gm (∆IVC /∆FBX)
(Note 3)
230
µS
VC Output Impedance
(Note 3)
5
MΩ
VFBX Line Regulation (∆VFBX/[∆VIN • VFBX(REG)])
VC Current Mode Gain (∆VVC /∆VSENSE)
VC Source Current
VC Sink Current
FBX > 0V, 5.5V < VIN < 100V (Notes 3, 6)
FBX < 0V, 5.5V < VIN < 100V (Notes 3, 6)
VC = 1.5V
FBX = 1.7V
FBX = –0.85V
0.006 0.025
%/ V
0.005 0.03
%/ V
5.5
V/ V
–15
µA
12
µA
11
µA
Oscillator
Switching Frequency
RT Voltage
RT = 41.2k to GND, FBX = 1.6V
RT = 140k to GND, FBX = 1.6V
RT = 10.5k to GND, FBX = 1.6V
FBX = 1.6V
270
300
330
kHz
100
kHz
1000
kHz
1.2
V
Minimum Off-Time
220
ns
Minimum On-Time
220
ns
SYNC Input Low
0.4
SYNC Input High
1.5
SS Pull-Up Current
SS = 0V, Current Out of Pin
–10
µA
Low Dropout Regulator
INTVCC Regulation Voltage
INTVCC Undervoltage Lockout Threshold
Falling INTVCC
UVLO Hysteresis
l
7
7.2
7.4
V
4.3
4.5
4.7
V
0.5
V
INTVCC Overvoltage Lockout Threshold
INTVCC Current Limit
INTVCC Load Regulation (∆VINTVCC / VINTVCC)
INTVCC Line Regulation (∆VINTVCC / [∆VIN • VINTVCC])
VIN = 100V
VIN = 20V
0 < IINTVCC < 10mA, VIN = 8V
8V < VIN < 100V
17.5
V
11
16
22
mA
50
mA
–1
–0.4
%
0.005 0.02
%/ V
Dropout Voltage (VIN – VINTVCC)
VIN = 6V, IINTVCC = 10mA
500
mV
3758afd
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