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Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters

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

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 2.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 1
Output Adjust. Method Preset
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2000
Package/Pins SC70/6
UDFN/6
Budgetary
Price (See Notes)
2.62
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Simplified Block Diagram

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 2.5
IOUT1 (A) (max) 0.5
Switch Type Internal
Preset VOUT (V) 1
Output Adjust. Method Preset
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2000
Package/Pins SC70/6
UDFN/6
Budgetary
Price (See Notes)
2.62

Key Features

  • 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

Applications/Uses

  • Cell Phones, PDAs, DSCs, MP3s
  • I/O Power
  • Microprocessor/DSP Core Power
  • Other Handhelds Where Space Is Limited

Description

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.

Simplified Block Diagram

MAX8640Y, MAX8640Z: Typical Operating Circuit MAX8640Y, MAX8640Z: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.