Top

High-Frequency, High-Power, Low-Noise, Step-Up DC-DC Converter

Product Details

Key Features

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Shutdown Mode Supply Current (µA) (typ) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 350
Package/Pins QSOP/16
Budgetary
Price (See Notes)
5.5
View Less

Simplified Block Diagram

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.

Parameters

Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.7
VIN (V) (max) 5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method Preset
Resistor
Shutdown Mode Supply Current (µA) (typ) 1
# DC-DC Outputs 1
Switching Frequency (kHz) 350
Package/Pins QSOP/16
Budgetary
Price (See Notes)
5.5

Key Features

  • On-Chip 5A Power MOSFET
  • 5V, 2A Output from a 3.3V Input
  • Fixed 3.3V or 5V Output Voltage or Adjustable (2.5V to 5.5V)
  • Input Voltage Range Down to 0.7V
  • Low Power Consumption
    • 1mW Quiescent Power
    • 1µA Current in Shutdown Mode
  • Low-Noise, Constant Frequency Operation (600kHz)
  • Synchronizable Switching Frequency (350kHz to 1000kHz)
  • Small QSOP Package

Applications/Uses

  • 3.6V or 5V RF PAs in Communications Handsets
  • Local 2.5V to 3.3V or 5V Conversion
  • Local 3.3V to 5V Conversion
  • Routers, Servers, Workstations, Card Racks

Description

The MAX1708 sets a new standard of space savings for high-power, step-up DC-DC conversion. It delivers up to 10W at a fixed (3.3V or 5V) or adjustable (2.5V to 5.5V) output, using an on-chip power MOSFET from a 0.7V to 5V supply.

Fixed-frequency PWM operation ensures that the switching noise spectrum is constrained to the 600kHz fundamental and its harmonics, allowing easy postfiltering for noise reduction. External clock synchronization capability allows for even tighter noise spectrum control. Quiescent power consumption is less than 1mW to extend operating time in battery-powered systems.

Two control inputs (ONA, active-low ONB) allow simple push-on, push-off control through a single momentary push-button switch, as well as conventional on/off logic control. The MAX1708 also features programmable soft-start and current limit for design flexibility and optimum performance with batteries. The maximum RMS switch current rating is 5A. For a device with a higher (10A) switch current rating, refer to the MAX1709 data sheet.

Simplified Block Diagram

MAX1708: Typical Operating Circuit MAX1708: 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.