Electrical Characteristics - Linear Technology Analog Devices LT8708-1 Datasheet

LT8708-1

ELECTRICAL CHARACTERISTICS

junction temperature range, otherwise specifications are at T
PARAMETER
Voltage Supplies and Regulators
V Operating Voltage Range
INCHIP
V Quiescent Current
INCHIP
V Quiescent Current in Shutdown
INCHIP
EXTV Switchover Voltage
CC
EXTV Switchover Hysteresis
CC
INTV Current Limit
CC
INTV Voltage
CC
INTV Load Regulation
CC
INTV , GATEV Undervoltage Lockout
CC CC
INTV , GATEV Undervoltage Lockout Hysteresis
CC CC
INTV Regulator Dropout Voltage
CC
LDO33 Pin Voltage
LDO33 Pin Load Regulation
LDO33 Pin Current Limit
LDO33 Pin Undervoltage Lockout
LDO33 Pin Undervoltage Lockout Hysteresis
Switching Regulator Control
Maximum Current Sense Threshold (V
Maximum Current Sense Threshold (V
Maximum Current Sense Threshold (V
Maximum Current Sense Threshold (V
Gain from V to Max Current Sense Voltage
C
(V – V ) (A5 in the Block Diagram)
CSP CSN
SHDN Input Voltage High
SHDN Input Voltage High Hysteresis
SHDN Input Voltage Low
SHDN Pin Bias Current
SWEN Rising Threshold Voltage
SWEN Threshold Voltage Hysteresis
SWEN Output Voltage Low
SWEN Internal Pull-Down Release Voltage
4
The
= 25°C. V
A
CONDITIONS
EXTV
EXTV
Not Switching, V
SWEN = 3.3V
SWEN = 0V
V
SHDN
I
INTVCC
Max Current Draw from INTV
Combined. Regulated from V
INTV
INTV
Regulated from V
Regulated from EXTV
I
INTVCC
INTV
GATEV
V
INCHIP
5mA from LDO33 Pin
I
LDO33
SYNC = 3V
LDO33 Falling
– V ) Boost Mode, Minimum M3 Switch Duty Cycle
CSP CSN
– V ) Buck Mode, Minimum M2 Switch Duty Cycle
CSN CSP
– V ) Boost Mode, Minimum M3 Switch Duty Cycle
CSN CSP
– V ) Buck Mode, Minimum M2 Switch Duty Cycle
CSP CSN
Boost Mode
Buck Mode
SHDN Rising to Enable the Device
Device Disabled, Low Quiescent Current
(LT8708E-1, LT8708I-1)
(LT8708H-1)
V
SHDN
V
SHDN
I
SWEN
SHDN = 0V or V
SHDN = 3V
SHDN = 3V
For more information
denotes the specifications which apply over the specified operating
l
=12V, SHDN = 3V, DIR = 3.3V unless otherwise noted. (Note 3).
INCHIP
= 0V
CC
= 7.5V
CC
= 0
EXTVCC
= 0V
= –20mA, V Rising
EXTVCC
and LDO33 Pins
CC
or EXTV
INCHIP
= 5.25V
CC
= 4.4V
CC
, I = 20mA
INCHIP INTVCC
(12V), I
CC INTVCC
= 0mA to 50mA
Falling, GATEV Connected to INTV
CC CC
Connected to INTV
CC CC
– V , I = 20mA
INTVCC INTVCC
= 0.1mA to 5mA
= 3V
= 12V
= 200µA
= 0V
INCHIP
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MIN TYP
5.5
l
2.8
l
4.7
2.45
0
6.15 6.4
l
0.2
(12V)
CC
90 127
l
28 42
l
6.1 6.3
l
= 20mA 6.1 6.3
l
–0.5
4.45 4.65
l
CC
160
245
3.23 3.295
l
–0.25
12 17.25
l
2.96 3.04
35
76 93
l
68 82
l
79 93
l
72 84
l
135
–135
1.175 1.221 1.275
l
40
l
l
0
14
1.156 1.208 1.256
l
22
0.9
l
0.2
l
0.75 0.8
l
MAX UNITS
80 V
80 V
7.5 mA
4.5 mA
1 µA
6.6 V
V
165 mA
55 mA
6.5 V
6.5 V
–1.5 %
4.85 V
mV
mV
3.35 V
–1 %
22 mA
3.12 V
mV
110 mV
97 mV
108 mV
96 mV
mV/V
mV/V
V
mV
0.35 V
0.3 V
1 µA
22 µA
V
mV
1.1 V
0.5 V
V
Rev 0