MAX1708

PRODUCTION

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

Data Sheet (Rev. 1) Product Selection Table

Part Models: 2
1ku List Price: Starting From $5.50

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Overview

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

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.

Applications

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

Part Models: 2
1ku List Price: Starting From $5.50

Documentation

Data Sheet 1

MAX1708: High-Frequency, High-Power, Low-Noise, Step-Up DC-DC Converter Data Sheet (Rev.1) 01/10/2011

Reliability Data 1

MAX1708 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX1708EEE+	16-QSOP-150_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX1708EEE+T	16-QSOP-150_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 3, 2023 - 2361NA WAFER FAB
		pcn_2361na
MAX1708EEE+	PRODUCTION
MAX1708EEE+T	PRODUCTION
Jan 24, 2019 - 1746N ASSEMBLY
		pcn_1746n
MAX1708EEE+	PRODUCTION
MAX1708EEE+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX1708

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Features and Benefits

0.7V to V_OUT Input Voltage Range
Pin-Selectable +3.3V or +5V Output Voltage (+5V as Shipped)
Adjustable Output Voltage (+2.5V to +5.5V, External Divider)
Up to 2A Output Current
600kHz PWM Operation
Internal 5A MOSFET Switch
1µA IC Shutdown Current
Surface-Mount Components
Fully Assembled and Tested

Product Details

The MAX1708 evaluation kit (EV kit) is a step-up DC-DC switching regulator for 1- to 3-cell battery inputs as well as +2.5V or +3.3V regulated supply inputs. The EV kit accepts a positive input between 0.7V and V_OUT, and converts it to a higher, pin-selectable output voltage.

Efficiency is up to 90% with output load currents to 2A. This EV kit operates at fixed 600kHz PWM frequency, allowing the use of a small inductor.

A movable jumper on the EV kit selects either a +3.3V or +5V output voltage. Additional pads on the board accommodate the resistors for output adjustment. This EV kit uses surface-mount components and is fully assembled and tested for quick evaluation.