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Compact, High-Efficiency, Dual-Output, Step-Up DC-DC Converter

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 1.5
VIN (V) (max) 5.5
# Step-Up Outputs 2
VOUT (V) (min) 2.5
VOUT (V) (max) 28
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.15
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 1.5
VIN (V) (max) 5.5
# Step-Up Outputs 2
VOUT (V) (min) 2.5
VOUT (V) (max) 28
Package/Pins UMAX/10
Budgetary
Price (See Notes)
2.15

Key Features

  • Dual Step-Up Converter in a Tiny 10-Pin µMAX Package
  • Main Output
    • Up to 125mA Load Current
    • Fixed 3.3V or Adjustable 2.5V to 5.5V
    • Up to 88% Efficiency
    • Internal Switch
  • LCD Output
    • Up to 28V for LCD Bias
    • Internal Switch
  • Input Voltage Range +1.5V to +5.5V
  • Minimal External Components Required
  • 0.1µA Logic-Controlled Shutdown
  • Low 15µA Quiescent Supply Current

Applications/Uses

  • GPS Receivers
  • MP3 Players
  • Organizers/Translators
  • PDAs

Description

The MAX1817 is a compact, high-efficiency, dual-output step-up converter for portable devices that provides both the main logic supply and the LCD bias. The device operates from an input voltage of +1.5V to +5.5V, allowing the use of 2- or 3-cell alkaline batteries, or 1-cell lithium-ion (Li+) batteries.

The MAX1817's main regulator supplies 125mA at either a preset 3.3V or an adjustable 2.5V to 5.5V output voltage with up to 88% efficiency. A 0.1µA shutdown state also minimizes battery drain. The MAX1817's secondary step-up converter provides the LCD bias voltage and is adjustable up to +28V.

Other features include a fast switching frequency to reduce the size of external components and a low quiescent current to maximize battery life. Both outputs can be independently shut down for improved flexibility.

The MAX1817 is supplied in a compact 10-pin µMAX package. The MAX1817 evaluation kit (MAX1817EVKIT) is available to speed up design.

Simplified Block Diagram

MAX1817: Typical Operating Circuit MAX1817: 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 .