Smallest 2mm x 2.1mm SC70 Package, the Industry's Smallest Total Solution Size, and Most Robust 4MHz/2MHz Step-Down DC-DC Converters on the Market that Can Deliver 500mA with Over 93% Efficiency
The MAX8640Y/MAX8640Z step-down converters are
optimized for applications where small size, high efficiency,
and low output ripple are priorities. They utilize
a proprietary PWM control scheme that optimizes the
switching frequency for high efficiency with small external
components and maintains low output ripple voltage
at all loads. The MAX8640Z switches at up to
4MHz to allow a tiny 1µH inductor and 2.2µF output
capacitor. The MAX8640Y switches at up to 2MHz for
higher efficiency while still allowing small 2.2µH and
4.7µF components. Output current is guaranteed up to
500mA, while typical quiescent current is 28µA.
Factory-preset output voltages from 0.8V to 2.5V eliminate
external feedback components.
Internal synchronous rectification greatly improves efficiency
and replaces the external Schottky diode required in conventional step-down converters. Internal fast soft-start eliminates inrush current so as to reduce
input capacitor requirements.
The MAX8640Y/MAX8640Z are available in the tiny 6-pin, SC70 (2.0mm x 2.1mm) and µDFN (1.5mm x 1.0mm) packages. Both packages are lead-free.
Key Features
Applications/Uses
Tiny SC70 and µDFN Packages
500mA Guaranteed Output Current
4MHz or 2MHz PWM Switching Frequency
Tiny External Components: 1µH/2.2µF or 2.2µH/4.7µF
28µA Quiescent Current
Factory Preset Outputs from 0.8V to 2.5V
±1% Initial Accuracy
Low Output Ripple at All Loads
Ultrasonic Skip Mode Down to 1mA Loads
Ultra-Fast Line- and Load-Transient Response
Fast Soft-Start Eliminates Inrush Current
Cell Phones, PDAs, DSCs, MP3s
I/O Power
Microprocessor/DSP Core Power
Other Handhelds Where Space Is Limited
Key Specifications:
Switch-Mode DC-DC Power Supplies
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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