MAX1722
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MAX1722

1.5µA IQ, Step-Up DC-DC Converters in TSOT and µDFN

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $0.87
Features
  • Up to 90% Efficiency
  • No External Diode or FETs Needed
  • 1.5µA Quiescent Supply Current
  • 0.1µA Logic-Controlled Shutdown
  • ±1% Output Voltage Accuracy
  • Fixed Output Voltage (MAX1724) or Adjustable Output Voltage (MAX1722/MAX1723)
  • Up to 150mA Output Current
  • 0.8V to 5.5V Input Voltage Range
  • 0.91V Guaranteed Startup (MAX1722/MAX1724)
  • Internal EMI Suppression (MAX1722/MAX1724)
  • TSOT Package (0.9mm typ Height)
  • µDFN Package (2mm x 2mm x 0.75mm)
Additional Details
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The MAX1722/MAX1723/MAX1724 compact, high-efficiency, step-up DC-DC converters are available in tiny, 5-pin TSOT packages. They feature an extremely low 1.5µA quiescent supply current to ensure the highest possible light-load efficiency. Optimized for operation from one to two alkaline or nickel-metal-hydride (NiMH) cells, or a single Li+ cell, these devices are ideal for applications where extremely low quiescent current and ultra-small size are critical.

Built-in synchronous rectification significantly improves efficiency and reduces size and cost by eliminating the need for an external Schottky diode. All three devices feature a 0.5Ω N-channel power switch. The MAX1722/MAX1724 also feature proprietary noise-reduction circuitry, which suppresses electromagnetic interference (EMI) caused by the inductor in many step-up applications. The family offers different combinations of fixed or adjustable outputs, shutdown, and EMI reduction (see Selector Guide).

Applications

  • Digital Still Cameras
  • Low-Power Handheld Instruments
  • MP3 Players
  • Pagers
  • PDAs and Other Handheld Devices
  • Personal Medical Devices
  • Remote Controls
  • Remote Wireless Transmitters
  • Single-Cell Battery-Powered Devices
Part Models 4
1ku List Price Starting From $0.87

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX1722ELT+
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MAX1722ELT+T
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MAX1722EZK+
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MAX1722EZK+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX1724EVKIT

Evaluation Kit for the MAX1722, MAX1723, MAX1724

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MAX1724EVKIT

Evaluation Kit for the MAX1722, MAX1723, MAX1724

Evaluation Kit for the MAX1722, MAX1723, MAX1724

Features and Benefits

  • 0.91V to VOUT Input Voltage Range
  • Two Complete Boost Circuits
    • 3.3V Fixed (MAX1724)
    • 3.6V Adjustable Output (MAX1722)
  • Up to 50mA Output from a 1-Cell Input
    • Up to 100mA Output from a 2-Cell Input
  • 1.5µA Quiescent Current from VOUT
  • Up to 90% Efficiency with Synchronous Rectification
  • Switching Frequency Up to 200kHz
  • All Surface-Mount Design
  • Fully Assembled and Tested Board

Product Detail

The MAX1724 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate boost switching-regulator circuits. The left-side circuit contains a MAX1724 with a preset 3.3V output. Other preset voltages of 2.7V, 3.0V, or 5.0V are also available. The right-side circuit contains a MAX1722, which has an adjustable output voltage. This circuit's output is set for 3.6V. All devices regulate with input voltages from 0.91V to VOUT, making them ideal for 1- or 2-cell alkaline and NiMH battery applications.

The right-side circuit may also be used to evaluate the MAX1723, which features a shutdown (active-low SHDN) mode. The MAX1722/MAX1724 has a BATT pin, which lowers the guaranteed startup voltage from 1.2V to 0.91V.

The MAX1722/MAX1723/MAX1724 feature synchronous rectification and ultra-low (1.5µA typ) quiescent current for maximum efficiency and long battery life. Operation up to 200kHz allows tiny surface-mount components.

Applications

  • Digital Still Cameras
  • Low-Power Handheld Instruments
  • MP3 Players
  • Pagers
  • PDAs and Other Handheld Devices
  • Personal Medical Devices
  • Remote Controls
  • Remote Wireless Transmitters
  • Single-Cell Battery-Powered Devices

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