LTC3619IMSE#PBF

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Analog Devices Inc./Maxim Integrated

400MA/800MA SYNCHRONOUS STEP-DOWN DC/DC WITH AVERAGE INPUT CURRENT LIMIT

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LTC3619IMSE#PBF

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Analog Devices Inc./Maxim Integrated

400MA/800MA SYNCHRONOUS STEP-DOWN DC/DC WITH AVERAGE INPUT CURRENT LIMIT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3619 Series

The LTC3619 is a dual monolithic synchronous buck regulator using a constant frequency, current mode architecture.The input supply voltage range is 2.5V to 5.5V, making it ideal for Li-Ion and USB powered applications. 100% duty cycle capability provides low dropout operation, extending the run time in battery-operated systems. Low output voltages are supported with the 0.6V feedback reference voltage. Channel 1 and channel 2 can supply 400mA and 800mA output current, respectively.The LTC3619’s programmable average input current limit is ideal for USB applications and for point-of-load power supplies because the LTC3619’s limited input current will still allow its output to deliver high peak load currents without collapsing the input supply. When the sum of both channels’ currents exceeds the input current limit, channel 2 is current limited while channel 1 remains regulated. The operating frequency is internally set at 2.25MHz allowing the use of small surface mount inductors. Internal soft-start reduces in-rush current during start-up. The LTC3619 is available in small MSOP and 3mm × 3mm DFN packages and is also available in a low noise, high efficiency pulse skipping version, LTC3619B.Light Load OperationLTC3619Low Ripple Burst Mode (< 20mVpp), Iq < 50uALTC3619BPulse Skip (<5mVpp)ApplicationsHigh Peak Load Current ApplicationsUSB Powered DevicesSupercapacitor ChargingRadio Transmitters and Other Handheld Devices

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3619IMSE#PBF

Current - Output (Max)	800 mA
Current - Output (Min)	400 mA
Frequency - Switching	2.25 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Features	Exposed Pad
Package Length	0.118 in
Package Name	10-MSOP, 10-MSOP-EP
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.5 V
Voltage - Output (Max)	5 V
Voltage - Output (Min/Fixed)	0.6 V

LTC3619 Series

Part	Package Name	Mounting Type	Output Configuration	Voltage - Input (Max)	Voltage - Output (Max)	Voltage - Output (Min/Fixed)	Package Width	Package Features	Package Length	Current - Output (Min)	Current - Output (Max)	Number of Outputs	Topology	Synchronous Rectifier	Frequency - Switching	Voltage - Input (Min)	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Function	Package / Case
Analog Devices Inc./Maxim Integrated LTC3619BEMSE#TRPBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down
Analog Devices Inc./Maxim Integrated LTC3619EMSE#PBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down
Analog Devices Inc./Maxim Integrated LTC3619BIMSE#PBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down
Analog Devices Inc./Maxim Integrated LTC3619BIDD#TRPBF	10-DFN	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm		3 mm	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3619BIMSE#TRPBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down
Analog Devices Inc./Maxim Integrated LTC3619EDD#PBF	10-DFN	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm		3 mm	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3619BEDD#PBF	10-DFN	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm		3 mm	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3619EDD#TRPBF	10-DFN	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm		3 mm	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3619EMSE#TRPBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down
Analog Devices Inc./Maxim Integrated LTC3619EMSE#PBF	10-MSOP 10-MSOP-EP	Surface Mount	Positive	5.5 V	5 V	0.6 V	3 mm	Exposed Pad	0.118 in	400 mA	800 mA	2	Buck	Yes	2.25 MHz	2.5 V	Adjustable	125 °C	-40 °C	Step-Down

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC3619IMSE#PBF | Datasheet

R457 Reliability Data