MAX887
PRODUCTION100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter
Internal Power MOSFET and Current-Sense Reduces Component Count and Saves Space
- Part Models
- 2
- 1ku List Price
- Starting From $4.23
Overview
- 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
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
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX887HESA+ | Small-Outline IC Narrow (0.15in) | ||
| MAX887HESA+T | Small-Outline IC Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| MAX887HESA+ | PRODUCTION | |
| MAX887HESA+T | PRODUCTION | |
|
Apr 20, 2026 - 2571A PIN/ERRATA |
||
| MAX887HESA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareLatest Discussions
No discussions on MAX887 yet. Have something to say?
Start a Discussion on EngineerZone®