LTC3544BEUD#PBF

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Analog Devices Inc./Maxim Integrated

QUAD SYNCHRONOUS STEP-DOWN REGULATOR: 2.25MHZ, 300MA, 200MA, 200MA, 100MA

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LTC3544BEUD#PBF

Active

Analog Devices Inc./Maxim Integrated

QUAD SYNCHRONOUS STEP-DOWN REGULATOR: 2.25MHZ, 300MA, 200MA, 200MA, 100MA

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3544 Series

The LTC3544B is a quad, high efficiency, monolithic synchronous buck regulator using a constant frequency, current mode architecture. The four regulators operate independently with separate run pins. The 2.25V to 5.5V input voltage range makes the LTC3544B well suited for single Li-Ion/polymer battery-powered applications. 100% duty cycle provides low dropout operation, extending battery runtime in portable systems. At moderate and low output load levels PWM pulse skip mode operation provides very low output ripple voltage for noise sensitive applications.Switching frequency is internally set to 2.25MHz, allowing the use of small surface mount inductors and capacitors.The internal synchronous switches increase efficiency and eliminate the need for external Schottky diodes. Low output voltages are easily supported with the 0.8V feedback reference voltage.The LTC3544B is available in a low profile (0.75mm) (3mm × 3mm) QFN package.Light Load OperationLTC3544Burst Mode (20mVpp), < 70uA IqLTC3544BPulse Skip ModeApplicationsCellular TelephonesPersonal Information AppliancesWireless and DSL ModemsDigital Still CamerasMedia PlayersPortable Instruments

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3544BEUD#PBF

Current - Output (Value 1)	100 mA
Current - Output (Value 2)	200 mA
Current - Output (Value 3)	300 mA
Frequency - Switching	2.25 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	4
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	16-WFQFN Exposed Pad
Package Length	3 mm
Package Name	16-QFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.25 V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min/Fixed)	0.8 V

LTC3544 Series

Quad Synchronous Step-Down Regulator: 2.25MHz, 300mA, 200mA, 200mA, 100mA

Part	Current - Output (Value 2)	Current - Output (Value 1)	Current - Output (Value 3)	Package Width	Package Name	Package Length	Number of Outputs	Package / Case	Function	Frequency - Switching	Synchronous Rectifier	Mounting Type	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Output Type	Voltage - Output (Max)	Output Configuration	Topology	Voltage - Input (Min)
Analog Devices Inc./Maxim Integrated LTC3544BEUD#PBF	200 mA	100 mA	300 mA	3 mm	16-QFN	3 mm	4	16-WFQFN Exposed Pad	Step-Down	2.25 MHz	Yes	Surface Mount	85 °C	-40 °C	5.5 V	0.8 V	Adjustable	5.5 V	Positive	Buck	2.25 V
Analog Devices Inc./Maxim Integrated LTC3544EUD#PBF	200 mA	100 mA	300 mA	3 mm	16-QFN	3 mm	4	16-WFQFN Exposed Pad	Step-Down	2.25 MHz	Yes	Surface Mount	85 °C	-40 °C	5.5 V	0.8 V	Adjustable	5.5 V	Positive	Buck	2.25 V
Analog Devices Inc./Maxim Integrated LTC3544BEUD#TRPBF	200 mA	100 mA	300 mA	3 mm	16-QFN	3 mm	4	16-WFQFN Exposed Pad	Step-Down	2.25 MHz	Yes	Surface Mount	85 °C	-40 °C	5.5 V	0.8 V	Adjustable	5.5 V	Positive	Buck	2.25 V
Analog Devices Inc./Maxim Integrated LTC3544EUD#TRPBF	200 mA	100 mA	300 mA	3 mm	16-QFN	3 mm	4	16-WFQFN Exposed Pad	Step-Down	2.25 MHz	Yes	Surface Mount	85 °C	-40 °C	5.5 V	0.8 V	Adjustable	5.5 V	Positive	Buck	2.25 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R415 Reliability Data

LTC3544BEUD#PBF | Datasheet