MAX1760

PRODUCTION

0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter

Data Sheet (Rev. 3) Product Selection Table
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Overview

  • Up to 94% Efficiency
  • 0.7V to 5.5V Input Range
  • Up to 800mA Output
  • Fixed 3.3V Output (or Adjustable from 2.5V to 5.5V)
  • PWM Synchronous-Rectified Topology
  • Low-Noise, Constant-Frequency Operation (1MHz)
  • 0.1µA Logic-Controlled Shutdown
  • Synchronizable Switching Frequency
  • Adjustable Current Limit
  • Adjustable Soft-Start
  • 10-Pin µMAX Package
  • 10-Pin 3mm x 3mm TDFN Package

The MAX1760/MAX1760H are high-efficiency, low-noise, step-up DC-DC converters intended for use in battery-powered wireless applications. They combine low quiescent supply current (100µA) with a high 1MHz operating frequency. Small external components and tiny 10-pin TDFN and µMAX® packages make this device an excellent choice for small hand-held applications. The MAX1760 is activated by a logic-low active-low ON signal while the MAX1760H is activated by a logic-high ON input.

Both devices use a synchronous-rectified pulse-width-modulation (PWM) boost topology to generate 2.5V to 5.5V outputs from a wide range of inputs, such as 1 to 3 alkaline or NiCd/NiMH cells or a single lithium-ion (Li+) cell. Proprietary Idle-Mode™ circuitry significantly improves light-load efficiency and smoothly transitions to fixed-frequency PWM operation at higher load currents.

Low-noise, forced-PWM mode is available for applications requiring constant-frequency operation at all load currents. PWM operation can also be synchronized to an external clock to protect sensitive frequency bands in communications equipment. Analog soft-start and adjustable current limit permit optimization of efficiency, external component size, and output voltage ripple.

Applications

  • Digital Cordless Phones
  • Handheld Instruments
  • Palmtop Computers
  • PCS Phones
  • Personal Communicators
  • Two-Way Paging
  • Wireless Handsets
MAX1760
0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760, MAX1760H: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
MAX1763
PRODUCTION 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1765
PRODUCTION 800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator
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Evaluation Kits

MAX1760EVKIT

Evaluation Kit for the MAX1760

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Features and Benefits

  • +0.7V to +5.5V Input Voltage
  • +3.3V Output Voltage
  • Internal Synchronous Rectifier Provides up to 96% Efficiency
  • Output is Adjustable with External Resistors
  • Up to 800mA Output
  • On-Chip N-Channel Switch
  • 1µA Shutdown Current
  • 1MHz Switching Frequency
  • Fixed-Frequency PWM Operation
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX1760 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains a boost switching-regulator circuit. The EV kit provides a regulated +3.3V output at up to 800mA of current. The input voltage range is +0.7V to +5.5V. However, the output voltage will rise above the regulation point for input voltages exceeding 3.3V. A one- or two-cell battery input can also be used to power the EV kit.

The MAX1760 features an internal N-channel MOSFET switch, a synchronous rectifier, and a pin-selectable forced PWM mode. The MAX1760 EV kit demonstrates low quiescent current and power efficiency up to 96%, thus increasing battery life. Operation at 1MHz allows the use of tiny surface-mount components.

Applications

  • Cable Modems
  • Cell Phones
  • Consumer Audio
  • Cordless Phones
  • Digital Still Cameras
  • Global Positioning Systems (GPS)
  • Pagers
  • Pen Entry Palmtops
  • POS Terminals
  • Wireless Data
  • Wireless Local Area Networks (WLANs)
  • Wireless Local Loop (WLL)
MAX1760EVKIT
Evaluation Kit for the MAX1760

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