MAX887HESA+T

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Analog Devices Inc./Maxim Integrated

100% DUTY CYCLE, LOW-NOISE, STEP-DOWN, PWM DC-DC CONVERTER

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MAX887HESA+T

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Analog Devices Inc./Maxim Integrated

100% DUTY CYCLE, LOW-NOISE, STEP-DOWN, PWM DC-DC CONVERTER

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Description Specifications Series Pricing CAD Documents

Description

General part information

MAX887 Series

The MAX887 high-efficiency, step-down DC-DC converter provides an adjustable output from 1.25V to 10.5V. It accepts inputs from 3.5V to 11V and delivers 600mA. Operation to 100% duty cycle minimizes dropout voltage (300mV typ at 500mA). Synchronous rectification reduces output rectifier losses, resulting in efficiency as high as 95%.Fixed-frequency pulse-width modulation (PWM) reduces noise in sensitive communications applications. Using a high-frequency internal oscillator allows tiny surface-mount components to reduce PC board area, and eliminates audio-frequency interference. A SYNC input allows synchronization to an external clock to avoid interference with sensitive RF and data-acquisition circuits.The MAX887 features current-mode operation for superior load/line-transient response. Cycle-by-cycle current limiting protects the internal MOSFET and rectifier. A low-current (2.5µA typ) shutdown mode conserves battery life.ApplicationsCell PhonesComputer PeripheralsDistributed Power SystemsPersonal CommunicatorsPortable Instrumentation

Technical Specifications

Parameters and characteristics for this part

Specification	MAX887HESA+T

Current - Output	600 mA
Frequency - Switching (Max)	350 kHz
Frequency - Switching (Min)	250 kHz
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)	11 V
Voltage - Input (Min)	3.5 V
Voltage - Output (Max)	10.5 V
Voltage - Output (Min/Fixed)	1.25 V

MAX887 Series

100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter

Part	Frequency - Switching (Max)	Frequency - Switching (Min)	Voltage - Input (Max)	Number of Outputs	Synchronous Rectifier	Voltage - Output (Max)	Output Configuration	Operating Temperature (Max)	Operating Temperature (Min)	Topology	Mounting Type	Current - Output	Function	Voltage - Output (Min/Fixed)	Output Type	Voltage - Input (Min)	Package Length	Package Name	Package Width
Analog Devices Inc./Maxim Integrated MAX887HESA+T	350 kHz	250 kHz	11 V	1	Yes	10.5 V	Positive	85 °C	-40 °C	Buck	Surface Mount	600 mA	Step-Down	1.25 V	Adjustable	3.5 V	0.154 in	8-SOIC	3.9 mm
Analog Devices Inc./Maxim Integrated MAX887HESA+	350 kHz	250 kHz	11 V	1	Yes	10.5 V	Positive	85 °C	-40 °C	Buck	Surface Mount	600 mA	Step-Down	1.25 V	Adjustable	3.5 V	0.154 in	8-SOIC	3.9 mm
Analog Devices Inc./Maxim Integrated MAX8873TEUK

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

Package Drawing - Small-Outline IC, Narrow (0.15in)