MAX887
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MAX887

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

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Internal Power MOSFET and Current-Sense Reduces Component Count and Saves Space

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.25
Features
  • 95% Efficiency
  • 600mA Output Current
  • Cycle-by-Cycle Current Limiting
  • Low-Dropout, 100% Duty-Cycle Operation, 300mV at 500mA
  • Internal 0.6Ω (typ) MOSFET
  • Internal Synchronous Rectifier
  • High-Frequency Current-Mode PWM
  • External SYNC or Internal 300kHz Oscillator
  • Guaranteed 260kHz to 340kHz Internal Oscillator Frequency Limits
  • 2.5µA Shutdown Mode
Additional Details
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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.

Applications

  • Cell Phones
  • Computer Peripherals
  • Distributed Power Systems
  • Personal Communicators
  • Portable Instrumentation
Part Models 2
1ku List Price Starting From $3.25

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PCN

Oct 30, 2020

- 1702R2

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MAX887HESA+

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PRODUCTION

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ASSEMBLY

MAX887HESA+

PRODUCTION

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PRODUCTION

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