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LTC3621 Series

17V, 1A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

Manufacturer: Analog Devices Inc

Catalog

17V, 1A Synchronous Step-Down Regulator with 3.5μA Quiescent Current

PartFunctionSynchronous RectifierFrequency - SwitchingOperating Temperature [Max]Operating Temperature [Min]Package / Case [x]Package / Case [x]Package / CaseOutput TypeVoltage - Output (Min/Fixed)Number of OutputsSupplier Device PackageTopologyMounting TypeVoltage - Input (Min) [Min]Current - OutputVoltage - Input (Max) [Max]Output ConfigurationOutput TypeVoltage - Output (Max) [Max]
Analog Devices Inc
LTC3621EMS8E-5#PBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E#PBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621EDCB-25#TRMPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB-3.3#TRMPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621EDCB-2
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621HMS8E-5#PBF
Step-Down
1 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-3.3#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IMS8E-5#PBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IMS8E#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IDCB-5
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-5#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621HMS8E-3.3#TRPBF
Step-Down
1 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621HMS8E-5#TRPBF
Step-Down
1 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB-23.3
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621HMS8E-23.3#PBF
Step-Down
2.25 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IDCB-2#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621HMS8E-3.3#PBF
Step-Down
1 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E-2#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621EDCB-5
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621HMS8E-25#TRPBF
Step-Down
2.25 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E-25#PBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E-2#PBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IMS8E-23.3#PBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EMS8E-23.3#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IMS8E-25#PBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-23.3#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-2#TRMPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IDCB-5#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621HMS8E#TRPBF
Step-Down
1 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IDCB-23.3#TRMPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB#TRMPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621EMS8E-25#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-25#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
5 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621EDCB-3.3
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621HMS8E-2#PBF
Step-Down
2.25 MHz
150 C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
0.6 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621EDCB-23.3#TRMPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IMS8E-5#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
5 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
0.6 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Adjustable
17 V
Analog Devices Inc
LTC3621IMS8E-3.3#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
0.118 in
3 mm
8-MSOP, 8-TSSOP, Exposed Pad
27.03 °C/W
3.3 V
1
8-MSOP-EP
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB-23.3#TRPBF
Step-Down
2.25 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive
Analog Devices Inc
LTC3621IDCB-3.3#TRPBF
Step-Down
1 MHz
125 ¯C
-40 °C
6-WFDFN Exposed Pad
27.03 °C/W
3.3 V
1
6-DFN (2x3)
Buck
Surface Mount
2.7 V
1 A
17 V
Positive

Key Features

• Wide VINRange: 2.7V to 17V
• Wide VOUTRange: 0.6V to VIN
• 95% Max Efficiency
• Low IQ< 3.5μA, Zero-Current Shutdown
• Constant Frequency (1MHz/2.25MHz)
• Full Dropout Operation with Low IQ
• 1A Rated Output Current
• ±1% Output Voltage Accuracy
• Current Mode Operation for Excellent Line and Load Transient Response
• Synchronizable to External Clock
• Pulse-Skipping, Forced Continuous, Burst Mode®Operation
• Internal Compensation and Soft-Start
• Overtemperature Protection
• Compact 6-Lead DFN (2mm × 3mm) Package or Thermally-Enhanced MS8E Package with Power Good Output and Independent SGND Pin
• AEC-Q100 Qualified for Automotive Applications

Description

AI
The LTC3621/LTC3621-2 is a high efficiency 17V, 1A synchronous monolithic step-down regulator. The switching frequency is fixed to 1MHz or 2.25MHz with a ±40% synchronizing range. The regulator features ultralow quiescent current and high efficiencies over a wide VOUTrange.The step-down regulator operates from an input voltage range of 2.7V to 17V and provides an adjustable output range from 0.6V to VINwhile delivering up to 1A of output current. A user-selectable mode input is provided to allow the user to trade off ripple noise for light load efficiency; Burst Mode operation provides the highest efficiency at light loads, while pulse-skipping mode provides the lowest voltage ripple. The MODE pin can also be used to allow the user to sync the switching frequency to an external clock.LTC3621 OptionsPart NameFrequencyVOUTLTC36211.00MHzAdjustableLTC3621-3.31.00MHz3.3VLTC3621-51.00MHz5VLTC3621-22.25MHzAdjustableLTC3621-23.32.25MHz3.3LTC3621-252.25MHz5VAPPLICATIONSPortable-Handheld ScannersIndustrial and Embedded ComputingAutomotive ApplicationsEmergency Radio