MAX1556ETB+T

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 2.6V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 0.75V TO 5.5V/1.8V/2.5V/3.3V 1.2A 10-PIN TDFN EP T/R

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MAX1556ETB+T

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Analog Devices Inc./Maxim Integrated

CONV DC-DC 2.6V TO 5.5V SYNCHRONOUS STEP DOWN SINGLE-OUT 0.75V TO 5.5V/1.8V/2.5V/3.3V 1.2A 10-PIN TDFN EP T/R

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX1556 Series

The MAX1556/MAX1556A/MAX1557 are low-operating-current (16µA), fixed-frequency step-down regulators. High efficiency, low-quiescent operating current, low dropout, and minimal (27µA) quiescent current in dropout make these converters ideal for powering portable devices from 1-cell Li-ion or 3-cell alkaline/NiMH batteries. The MAX1556 delivers up to 1.2A; has pin-selectable 1.8V, 2.5V, and 3.3V outputs; and is also adjustable. The MAX1557 delivers up to 600mA; has pin-selectable 1V, 1.3V, and 1.5V outputs; and is also adjustable.The MAX1556/MAX1556A/MAX1557 contain a low-on-resistance internal MOSFET switch and synchronous rectifier to maximize efficiency and dropout performance while minimizing external component count. A proprietary topology offers the benefits of a high fixed-frequency operation while still providing excellent efficiency at both light and full loads. A 1MHz PWM switching frequency keeps components small. Both devices also feature an adjustable soft-start to minimize battery transient loading.The MAX1556/MAX1556A/MAX1557 are available in a tiny 10-pin TDFN (3mm x 3mm) package.ApplicationsCell Phones/SmartphonesDigital Cameras and CamcordersHandheld InstrumentsPDAs and Palmtop ComputersPortable MP3 and DVD Players

Technical Specifications

Parameters and characteristics for this part

Specification	MAX1556ETB+T

Current - Output	1.2 A
Frequency - Switching	1 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable (Programmable)
Package / Case	10-WFDFN Exposed Pad
Package Length	3 mm
Package Name	10-TDFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.6 V
Voltage - Output (Fixed Options)	3.3V, 1.8V, 2.5V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min)	0.75 V

MAX1556 Series

Part	Operating Temperature (Max)	Operating Temperature (Min)	Package Length	Package Name	Package Width	Function	Output Configuration	Current - Output	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Package / Case	Mounting Type	Topology	Output Type	Voltage - Input (Min)	Frequency - Switching	Synchronous Rectifier	Number of Outputs	Voltage - Output (Fixed Options)	Voltage - Output (Min)	Qualification	Voltage - Output (Max)	Grade	Supplied Contents	Board Type	Total Output Count	Non-Isolated Output Count	Utilized IC / Part	Main Purpose	Contents	Regulator Topology	Voltage - Output	Voltage - Input (Minimum)	Voltage - Input (Maximum)
Analog Devices Inc./Maxim Integrated MAX1556AETB+T	85 °C	-40 °C	3 mm	10-TDFN	3 mm	Step-Down	Positive	1.2 A	5.5 V	1.2 V 1.5 V 2.5 V 3.3 V	10-WFDFN Exposed Pad	Surface Mount	Buck	Programmable	2.6 V	1 MHz	Yes	1
Analog Devices Inc./Maxim Integrated MAX1556ETB/V+T	85 °C	-40 °C	3 mm	10-TDFN	3 mm	Step-Down	Positive	1.2 A	5.5 V		10-WFDFN Exposed Pad	Surface Mount	Buck	Adjustable (Programmable)	2.6 V	1 MHz	Yes	1	1.8V 2.5V 3.3V	0.75 V	AEC-Q100	5.5 V	Automotive
Analog Devices Inc./Maxim Integrated MAX1556ETB+T	85 °C	-40 °C	3 mm	10-TDFN	3 mm	Step-Down	Positive	1.2 A	5.5 V		10-WFDFN Exposed Pad	Surface Mount	Buck	Adjustable (Programmable)	2.6 V	1 MHz	Yes	1	1.8V 2.5V 3.3V	0.75 V		5.5 V
Analog Devices Inc./Maxim Integrated MAX1556EVKIT								1.2 A						Non-Isolated		1 MHz								Board(s)	Fully Populated	1	1 count	MAX1556	DC/DC Step Down	Board	Buck	1.8 V	2.6 V	5.5 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

MAX1556ETB+T | Datasheet

Package Drawing - Thin Dual Flatpack No Leads, Exposed Pad

MAX1556 Reliability Data