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1.5MHz Dual Step-Down DC-DC Converters with Dual LDOs and Individual Enables

Save Power and Board Space Using the Industry's First Dual Step-Down DC-DC Converters with Dual Low-Input LDOs

Product Details

Key Features

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 1.2
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 1500
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.95
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 2.6
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.6
VOUT1 (V) (max) 3.3
IOUT1 (A) (max) 1.2
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 1500
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.95

Key Features

  • Tiny, Thin QFN 3mm x 3mm Package
  • Individual Enables
  • Step-Down Converters
    • 600mA Guaranteed Output Current on OUT1
    • 1200mA Guaranteed Output Current on OUT2
    • Tiny Size 2.2µH Chip Inductor (0805)
    • Output Voltage from 0.6V to 3.3V (MAX8668)
    • Ultra-Fast Line and Load Transients
    • Low 25µA Supply Current Each
  • LDOs
    • 300mA Guaranteed
    • Low 1.7V Minimum Supply Voltage
    • Low Output Noise

Applications/Uses

  • Cell Phones/Smartphones
  • Digital Cameras, Camcorders
  • Handheld Instruments
  • PCMCIA Cards
  • PDA and Palmtop Computers
  • Portable MP3 and DVD Players

Description

The MAX8667/MAX8668 dual step-down converters with dual low-dropout (LDO) linear regulators are intended to power low-voltage microprocessors or DSPs in portable devices. They feature high efficiency with small external component size. The step-down converters are adjustable from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667) with guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA with all outputs enabled. Dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage. The MAX8667/MAX8668 have individual enables for each output, maximizing flexibility.

The MAX8667/MAX8668 are available in the space-saving, 3mm x 3mm, 16-pin thin QFN package.

Simplified Block Diagram

MAX8667, MAX8668: Typical Operating Circuit MAX8667, MAX8668: 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 .