MAX1951AESA+

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Analog Devices Inc./Maxim Integrated

1MHZ, 2A, 2.6V TO 5.5V INPUT, PWM DC-DC STEP-DOWN REGULATOR WITH ENABLE

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MAX1951AESA+

Active

Analog Devices Inc./Maxim Integrated

1MHZ, 2A, 2.6V TO 5.5V INPUT, PWM DC-DC STEP-DOWN REGULATOR WITH ENABLE

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX1951 Series

The MAX1951A high-efficiency, DC-DC step-down switching regulator delivers up to 2A of output current. The device operates from an input voltage range of 2.6V to 5.5V and provides an adjustable output voltage from 0.8V to VIN, making the MAX1951A ideal for on-board postregulation applications. The MAX1951A total output error is less than ±1.5% over load, line, and temperature.The MAX1951A operates at a fixed frequency of 1MHz with an efficiency of up to 94%. The high operating frequency minimizes the size of external components. Internal soft-start control circuitry reduces inrush current. Short-circuit and thermal-overload protection improve design reliability.The MAX1951A can start up safely with a prebiased or without a preexisting output. This feature simplifies tracking supply designs for core and I/O applications and redundant supply designs.The MAX1951A is available in an 8-pin SO package and operates over the -40°C to +85°C extended temperature range.ApplicationsASIC/DSP/µP/FPGA Core and I/O VoltagesNetworking and TelecommunicationsServersSet-Top BoxesTVs

Technical Specifications

Parameters and characteristics for this part

Specification	MAX1951AESA+

Current - Output	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
Package Length	0.154 in
Package Name	8-SOIC
Package Width	3.9 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	5.5 V
Voltage - Input (Min)	2.6 V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min/Fixed)	0.8 V

MAX1951 Series

1MHz, All-Ceramic, 2.6V to 5.5V Input, 2A PWM Step-Down DC-to-DC Regulators

Part	Synchronous Rectifier	Frequency - Switching	Voltage - Input (Max)	Mounting Type	Output Configuration	Output Type	Function	Topology	Package Name	Operating Temperature (Max)	Operating Temperature (Min)	Package Length	Package Width	Current - Output	Voltage - Output (Min/Fixed)	Number of Outputs	Voltage - Output (Max)	Voltage - Input (Min)	Frequency - Switching (Max)	Frequency - Switching (Min)
Analog Devices Inc./Maxim Integrated MAX1951AESA+	Yes	1 MHz	5.5 V	Surface Mount	Positive	Adjustable	Step-Down	Buck	8-SOIC	85 °C	-40 °C	0.154 in	3.9 mm	2 A	0.8 V	1	5.5 V	2.6 V
Analog Devices Inc./Maxim Integrated MAX1951ESA+T	Yes		5.5 V	Surface Mount	Positive	Adjustable	Step-Down	Buck	8-SOIC	85 °C	-40 °C	0.154 in	3.9 mm	2 A	0.8 V	1	5.5 V	2.6 V	1.1 MHz	800 kHz
Analog Devices Inc./Maxim Integrated MAX1951ESA+	Yes		5.5 V	Surface Mount	Positive	Adjustable	Step-Down	Buck	8-SOIC	85 °C	-40 °C	0.154 in	3.9 mm	2 A	0.8 V	1	5.5 V	2.6 V	1.1 MHz	800 kHz

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - 8-SOIC_N-150_MIL

MAX1951A: 1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC Step-Down Regulator with Enable Data Sheet (Rev.0)