Linear Technology Analog Devices LT8708-1 Datasheet page 5

ELECTRICAL CHARACTERISTICS
junction temperature range, otherwise specifications are at T
PARAMETER
MODE Pin Continuous Conduction Mode (CCM) Threshold
MODE Pin Hybrid DCM/CCM Mode (HCM) Range
MODE Pin Discontinuous Conduction Mode (DCM) Range
MODE Pin Burst Mode Operation Threshold
DIR Pin Forward Operation Threshold
DIR Pin Reverse Operation Threshold
RVSOFF Output Voltage Low
RVSOFF Falling Threshold Voltage
RVSOFF Threshold Voltage Hysteresis
Soft-Start Charging Current
IMON_ON Rising Threshold for FDCM Operation
IMON_ON Falling Threshold for CCM Operation
IMON_INP Rising Threshold for RDCM Operation
IMON_INP Falling Threshold for CCM Operation
ICP Rising Threshold for Start Switching
ICN Rising Threshold for Start Switching
ICP Rising Threshold for Enabling Non-CCM Offset Current
ICP Falling Threshold for Disabling Non-CCM Offset Current
ICN Rising Threshold for Enabling Non-CCM Offset Current
ICN Falling Threshold for Disabling Non-CCM Offset Current
Voltage Regulation 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 V
FBOUT Pin Bias Current
FBOUT Error Amp EA4 g
m
FBOUT Error Amp EA4 Voltage Gain
VOUTLOMON Voltage Activation Threshold
VOUTLOMON Threshold Voltage Hysteresis
VOUTLOMON Pin Bias Current
FBIN Pin Bias Current
FBIN Error Amp EA3 g
m
FBIN Error Amp EA3 Voltage Gain
VINHIMON Voltage Activation Threshold
VINHIMON Threshold Voltage Hysteresis
VINHIMON Pin Bias Current
The denotes the specifications which apply over the specified operating
l
= 25°C. V =12V, SHDN = 3V, DIR = 3.3V unless otherwise noted. (Note 3).
A INCHIP
CONDITIONS
I = 200µA
RVSOFF
V = 0V
SS
V = 0.5V
SS
MODE = 1V (HCM), DIR = 3.3V
MODE = 1V (HCM), DIR = 3.3V
MODE = 1V (HCM), DIR = 0V
MODE = 1V (HCM), DIR = 0V
Regulate V to 1.2V
C
Regulate V to 1.2V
C
= 12V to 80V, Not Switching
INCHIP
Current Out of Pin
Falling
V = 1.24V, Current Into Pin
VOUTLOMON
V = 1.17V, Current Into Pin
VOUTLOMON
Current Out of Pin
Rising
V = 1.17V, Current Into Pin
VINHIMON
V = 1.24V, Current Out of Pin
VINHIMON
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LT8708-1
MIN TYP MAX UNITS
0.4
l
0.8 1.2
l
1.6 2.0
l
2.4
l
1.6
l
1.2
l
0.08 0.5
l
1.155 1.209 1.275
l
165 mV
13 19 25 µA
21 31 41 µA
235 255 280 mV
l
185 205 235 mV
l
235 255 280 mV
l
185 205 235 mV
l
485 510 536 mV
l
485 510 536 mV
l
680 704 730 mV
l
500 530 560 mV
l
680 704 730 mV
l
500 530 560 mV
l
1.193 1.207 1.222
l
1.184 1.205 1.226
l
0.002 0.005 %/V
15 nA
345 µmho
245 V/V
1.185 1.207 1.225
l
24 mV
0.01 µA
0.8 1 1.2 µA
l
10 nA
235 µmho
150 V/V
1.185 1.207 1.23
l
24 mV
0.01 µA
0.8 1 1.2 µA
l
Rev 0
5
V
V
V
V
V
V
V
V
V
V
V
V