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LTC3622_15 Datasheet, PDF (3/24 Pages) Linear Technology – 17V, Dual 1A Synchronous Step-Down Regulator with Ultralow Quiescent Current
◁
LTC3622/
LTC3622-2/LTC3622-23/5
Electrical Characteristics The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN1 = VIN2 = 12V, unless otherwise noted. (Notes 3, 6)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN1, VIN2 Operating Voltage
SVIN Operating Voltage
VOUT Operating Voltage
IQ
Input Quiescent Current
VFB
Regulated Feedback Voltage
2.7
17
V
MSOP Package
2.7
17
V
0.6
VIN
V
Active Mode, VRUN1 = VRUN2 = 2V (Note 4)
Burst Mode Operation, VRUN1 = VRUN2 = 2V,
MODE/SYNC = 3V, No Load
Shutdown Mode; VRUN1 = VRUN2 = 0V
3
mA
5
10
µA
0.1
±1
µA
LTC3622/LTC3622-2
0.594 0.6 0.606
V
l 0.591 0.6 0.609
IFB
VOUT1
FB Input Current
Regulated Fixed Output Voltage
(Channel 1)
LTC3622/LTC3622-2
LTC3622-23/5
10
nA
4.950 5.0 5.050
V
l 4.925 5.0 5.075
V
VOUT2
Regulated Fixed Output Voltage
(Channel 2)
LTC3622-23/5
3.267 3.3 3.333
V
l 3.250 3.3 3.350
V
IFB(VOUT)
Feedback Input Leakage Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
LTC3622-23/5
VIN = 2.7V to 17V (Note 5)
(Note 5)
1
5
µA
0.01 0.015
%/V
0.1
%
NMOS Switch Leakage
PMOS Switch Leakage
0.1
1
µA
0.1
1
µA
RDS(ON) NMOS On-Resistance
PMOS On-Resistance
VIN = 5V
0.15
Ω
0.37
Ω
tON(MIN)
VRUN
Maximum Duty Cycle
Minimum On-Time
RUN Input High
RUN Input Low
VFB = 0V
VFB = 0.7V, VIN1 = VIN2 = 5
l
100
%
75
ns
1.0
V
0.35
V
VMODE
RUN Input Current
Pulse-Skipping Mode
Burst Mode Operation
PHASE Input Threshold
VRUN = 12V
Input Low
Input High
0.1 ±20
nA
VINTVCC–0.4
2.0
0.15
V
V
0.4
V
V
ILIM Input Threshold
Input Low
Input High
tSS
Soft Start Time
ILIM
Peak Current Limit
VIN > 5V
VILIM = 0.1V (Both Channels)
VILIM = INTVCC – 0.1V (Both Channels)
VILIM = Floating, Channel 1
VILIM = Floating, Channel 2
VINTVCC Undervoltage Lockout
VIN Ramping Up
VINTVCC Undervoltage Lockout Hysteresis
VIN Overvoltage Lockout Rising
VIN Overvoltage Lockout Hysteresis
VINTVCC–0.1
0.1
V
INTVCC
V
0.5
ms
A
1.6
1.8
2.0
A
0.8
1.0
1.2
A
1.6
1.8
2.0
A
0.8
1.0
1.2
2.3
2.5
2.65
V
160
mV
l
18
19
20
V
300
mV
For more information www.linear.com/LTC3622
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