LTC3548EKD-1

Obsolete

Analog Devices Inc./Maxim Integrated

IC REG BCK 1.575V/1.8V 10UTDFN

LTC3548EKD-1

Obsolete

Analog Devices Inc./Maxim Integrated

IC REG BCK 1.575V/1.8V 10UTDFN

Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3548 Series

The LTC3548 is a dual, constant frequency, synchronous step down DC/DC converter. Intended for low power applications, it operates from 2.5V to 5.5V input voltage range and has a constant 2.25MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors with a profile ≤1mm. Each output voltage is adjustable from 0.6V to 5V. Internal synchronous 0.35Ω, 0.7A/1.2A power switches provide high efficiency without the need for external Schottky diodes.A user selectable mode input is provided to allow the user to trade-off noise ripple for low power efficiency. Burst Mode operation provides high efficiency at light loads, while Pulse-Skipping Mode provides low noise ripple at light loads.To further maximize battery runtime, the P-channel MOSFETs are turned on continuously in dropout (100% duty cycle), and both channels draw a total quiescent current of only 40μA. In shutdown, the device draws <1μA.FeaturesLTC3548AImproved Burst Mode, Improved ESD, 2 Adjustable OutputsLTC3548-2One Fixed 1.8V Output, 1 AdjustableLTC3548-1Fixed 1.8V and 1.575V OutputsLTC35482 Adjustable OutputsApplicationsPDAs/Palmtop PCsDigital CamerasCellular PhonesPortable Media PlayersPC CardsWireless and DSL Modems

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3548EKD-1

Current - Output (Max)	1.2 A
Current - Output (Min)	700 mA
Frequency - Switching	2.25 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Fixed
Package / Case	10-UFDFN Exposed Pad
Package Length	3 mm
Package Name	10-UTDFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.5 V
Voltage - Output (Fixed)	1.8 V
Voltage - Output (Min)	1.575 V

LTC3548 Series

Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator

Part	Voltage - Output (Min/Fixed)	Package Name	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Voltage - Output (Max)	Frequency - Switching	Current - Output (Min)	Current - Output (Max)	Topology	Package Width	Package Features	Package Length	Synchronous Rectifier	Voltage - Input (Min)	Output Configuration	Voltage - Input (Max)	Number of Outputs	Function	Output Type	Package / Case	Voltage - Output (Fixed Options)	Voltage - Output (Min)	Voltage - Output (Fixed)
Analog Devices Inc./Maxim Integrated LTC3548AIMSE#PBF	0.6 V	10-MSOP 10-MSOP-EP	125 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm	Exposed Pad	0.118 in	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable
Analog Devices Inc./Maxim Integrated LTC3548IDD#TRPBF	0.6 V	10-DFN	85 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3548IMSE#TRPBF	0.6 V	10-MSOP 10-MSOP-EP	85 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm	Exposed Pad	0.118 in	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable
Analog Devices Inc./Maxim Integrated LTC3548EDD-2#TRPBF		10-DFN	85 °C	-40 °C	Surface Mount	5.5 V	2.25 MHz	700 mA	1.2 A	Buck Buck-Boost	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable (Fixed)	10-WFDFN Exposed Pad	1.8V	0.6 V
Analog Devices Inc./Maxim Integrated LTC3548EDD#PBF	0.6 V	10-DFN	85 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3548AIDD#TRPBF	0.6 V	10-DFN	125 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3548EMSE#TRPBF	0.6 V	10-MSOP 10-MSOP-EP	85 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm	Exposed Pad	0.118 in	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable
Analog Devices Inc./Maxim Integrated LTC3548AEDD#TRPBF	0.6 V	10-DFN	125 °C	-40 °C	Surface Mount	5 V	2.25 MHz	400 mA	800 mA	Buck Buck-Boost	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down Step-Up/Step-Down	Adjustable	10-WFDFN Exposed Pad
Analog Devices Inc./Maxim Integrated LTC3548EDD-1#PBF		10-DFN	85 °C	-40 °C	Surface Mount		2.25 MHz	700 mA	1.2 A	Buck	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down	Fixed	10-WFDFN Exposed Pad		1.575 V	1.8 V
Analog Devices Inc./Maxim Integrated LTC3548EKD-1		10-UTDFN	85 °C	-40 °C	Surface Mount		2.25 MHz	700 mA	1.2 A	Buck	3 mm		3 mm	Yes	2.5 V	Positive	5.5 V	2	Step-Down	Fixed	10-UFDFN Exposed Pad		1.575 V	1.8 V

Pricing

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CAD

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