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Low VBATT, 20µA IQ, 1MHz Synchronous Boost Converter with True Shutdown

Ideal for DSC Motors and Backup Power

Product Details

Key Features

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.9
VIN (V) (max) 5.5
VOUT1 (V) (min) 1
VOUT1 (V) (max) 5
IOUT1 (A) (max) 1
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.02
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins TDFN/14
Budgetary
Price (See Notes)
1.42
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.9
VIN (V) (max) 5.5
VOUT1 (V) (min) 1
VOUT1 (V) (max) 5
IOUT1 (A) (max) 1
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
ICC (mA) (typ) 0.02
Shutdown Mode Supply Current (µA) (typ) 0.1
Shutdown Mode Supply Current (µA) (max) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 1000
Package/Pins TDFN/14
Budgetary
Price (See Notes)
1.42

Key Features

  • 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

Applications/Uses

  • Cell Phones, PDAs, MP3 Players
  • DSC Motors and Backup Power
  • Microprocessor/DSP Core Power
  • Portable Handheld Devices

Description

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.

Simplified Block Diagram

MAX8627: Typical Operating Circuit MAX8627: 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 .