LT8705 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LT8705 Datasheet PDF : 44 Pages
| |||
LT8705
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, SHDN = 3V unless otherwise noted. (Note 3)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SHDN Pin Bias Current
SWEN Rising Threshold Voltage (Note 5)
VSHDN = 3V
VSHDN = 12V
0
1
µA
11 22
µA
l 1.156 1.206 1.256
V
SWEN Threshold Voltage Hysteresis (Note 5)
22
mV
MODE Pin Forced Continuous Mode Threshold
l 0.4
V
MODE Pin Burst Mode Range
l 1.0
1.7
V
MODE Pin Discontinuous Mode Threshold
l
2.3
V
Soft-Start Charging Current
Soft-Start Discharge Current
VSS = 0.5V
VSS = 0.5V
13 19 25
µA
9.5
µA
Voltage Regulator Loops (Refer to Block Diagram to Locate Amplifiers)
Regulation Voltage for FBOUT
Regulation Voltage for FBIN
Line Regulation for FBOUT and FBIN Error Amp Reference
Voltage
VC = 1.2V
VC = 1.2V
VIN = 12V to 80V
l 1.193 1.207 1.217
V
l 1.187 1.205 1.220
V
0.002 0.005 %/V
FBOUT Pin Bias Current
Current Out of Pin
15
nA
FBOUT Error Amp EA4 gm
315
µmho
FBOUT Error Amp EA4 Voltage Gain
220
V/V
FBIN Pin Bias Current
Current Out of Pin
10
nA
FBIN Error Amp EA3 gm
FBIN Error Amp EA3 Voltage Gain
130
µmho
90
V/V
SRVO_FBIN Activation Threshold (Note 5)
SRVO_FBIN Activation Threshold Hysteresis (Note 5)
(VFBIN Falling) – (Regulation Voltage for FBIN),
VFBOUT = VIMON_IN = VIMON_OUT = 0V
VFBOUT = VIMON_IN = VIMON_OUT = 0V
56 72 89
mV
33
mV
SRVO_FBOUT Activation Threshold (Note 5)
SRVO_FBOUT Activation Threshold Hysteresis (Note 5)
(VFBOUT Rising) – (Regulation Voltage for FBOUT),
VFBIN = 3V, VIMON_IN = VIMON_OUT = 0V
VFBIN = 3V, VIMON_IN = 0V, VIMON_OUT = 0V
–37 –29 –21
mV
15
mV
SRVO_FBIN, SRVO_FBOUT Low Voltage (Note 5)
I = 100μA
l
110 330
mV
SRVO_FBIN, SRVO_FBOUT Leakage Current (Note 5)
VSRVO_FBIN = VSRVO_FBOUT = 2.5V
Current Regulation Loops (Refer to Block Diagram to Locate Amplifiers)
l
0
1
µA
Regulation Voltages for IMON_IN and IMON_OUT
VC = 1.2V
l 1.191 1.208 1.223
V
Line Regulation for IMON_IN and IMON_OUT Error Amp
Reference Voltage
VIN = 12V to 80V
0.002 0.005 %/V
CSPIN, CSNIN Bias Current
BOOST Capacitor Charge Control Block Not Active
ICSPIN + ICSNIN, VCSPIN = VCSNIN = 12V
31
µA
CSPIN, CSNIN Common Mode Operating Voltage Range
l 1.5
80
V
CSPIN, CSNIN Differential Operating Voltage Range
l –100
100
mV
VCSPIN-CSNIN to IMON_IN Amplifier A7 gm
VCSPIN – VCSNIN = 50mV, VCSPIN = 5.025V
0.95 1 1.05 mmho
l 0.94 1 1.06 mmho
IMON_IN Maximum Output Current
l 100
µA
IMON_IN Overvoltage Threshold
l 1.55 1.61 1.67
V
IMON_IN Error Amp EA2 gm
185
µmho
IMON_IN Error Amp EA2 Voltage Gain
130
V/V
8705p
4
For more information www.linear.com/8705
Share Link: 