The MAX8627 step-up converter is a high-efficiency, low-quiescent current, synchronous boost converter with True Shutdown™ and inrush current limiting. The MAX8627 generates any boosted output voltage from 3V to 5V from either a 2-cell NiMH/NiCd or a single-cell Li+/Li polymer battery.
Quiescent current is only 20µA (typ), and at light loads the converter pulses only as needed for best efficiency. At higher loads, PWM mode maintains fixed 1MHz operation for lowest noise and ripple.
The MAX8627 includes an internal soft-start to limit inrush current to a maximum of 500mA. Additional features include True Shutdown, internal compensation, and adjustable current limit. The MAX8627 is available in a tiny 3mm x 3mm TDFN package and is ideal for use in handheld devices such as DSCs, PDAs, and smartphones.
Key Features
Applications/Uses
1MHz PWM Switching Frequency
True Shutdown Output
Up to 95% Efficiency
1.0A Guaranteed Output Current
Soft-Start Eliminates Inrush Current
20µA (typ) Quiescent Current
0.1µA Logic-Controlled Shutdown
Internal Synchronous Rectifier
Internal Compensation
Adjustable Current Limit
Low-Noise Antiringing Feature
Tiny 14-Pin, 3mm x 3mm, TDFN Package
Cell Phones, PDAs, MP3 Players
DSC Motors and Backup Power
Microprocessor/DSP Core Power
Portable Handheld Devices
Key Specifications:
Switch-Mode DC-DC Power Supplies
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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