MAX1771
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MAX1771

12V or Adjustable, High-Efficiency, Low IQ, Step-Up DC-DC Controller

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High-Efficiency Even at Low Input Voltages and Noise Reduction

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 7
1ku List Price Starting From $2.28
Features
  • 90% Efficiency for 30mA to 2A Load Currents
  • Up to 24W Output Power
  • 110µA (max) Supply Current
  • 5µA (max) Shutdown Current
  • 2V to 16.5V Input Range
  • Preset 12V or Adjustable Output Voltage
  • Current-Limited PFM Control Scheme
  • Up to 300kHz Switching Frequency
  • Evaluation Kit Available
Additional Details
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The MAX1771 step-up switching controller provides 90% efficiency over a 30mA to 2A load. A unique current-limited pulse-frequency-modulation (PFM) control scheme gives this device the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using less than 110µA of supply current (vs. 2mA to 10mA for PWM converters).

This controller uses miniature external components. Its high switching frequency (up to 300kHz) allows surface-mount magnetics of 5mm height and 9mm diameter. It accepts input voltages from 2V to 16.5V. The output voltage is preset at 12V, or can be adjusted using two resistors.

The MAX1771 optimizes efficiency at low input voltages and reduces noise by using a single 100mV current-limit threshold under all load conditions. A family of similar devices, the MAX770-MAX773, trades some full-load efficiency for greater current-limit accuracy; they provide a 200mV current limit at full load, and switch to 100mV for light loads.

The MAX1771 drives an external N-channel MOSFET switch, allowing it to power loads up to 24W. If less power is required, use the MAX756/MAX757 or MAX761/MAX762 step-up switching regulators with on-board MOSFETs. An evaluation kit is available.

Applications

  • Battery-Powered Applications
  • Flash Memory Programming
  • High-Power RF Power-Amplifier Supply
  • Palmtops/Handheld Terminals
  • Portable Communicators
  • Positive LCD-Bias Generators
Part Models 7
1ku List Price Starting From $2.28

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX1771CPA+
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MAX1771CSA+
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MAX1771CSA+T
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MAX1771EPA+
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MAX1771ESA+
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MAX1771ESA+T
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MAX1771MJA
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Part Models

Product Lifecycle

PCN

May 1, 2020

- 1702R

ASSEMBLY

MAX1771CSA+

PRODUCTION

MAX1771CSA+T

PRODUCTION

Aug 28, 2018

- 1702A

ASSEMBLY

MAX1771ESA+

PRODUCTION

MAX1771ESA+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

May 1, 2020

- 1702R

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ASSEMBLY

MAX1771CSA+

PRODUCTION

MAX1771CSA+T

PRODUCTION

Aug 28, 2018

- 1702A

arrow down

ASSEMBLY

MAX1771ESA+

PRODUCTION

MAX1771ESA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX1771EVKIT

Evaluation Kit for the MAX1771

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MAX1771EVKIT

Evaluation Kit for the MAX1771

Evaluation Kit for the MAX1771

Features and Benefits

  • 12V or Adjustable Output Voltage
  • 3V to VOUT + 0.5V Input Range
  • Up to 0.5A Output Current
  • 5µA Max Shutdown Current
  • 110µA Max Supply Current
  • 300kHz Switching Frequency
  • 8-Pin SO, Surface-Mount Construction
  • Fully Assembled and Tested

Product Detail

The MAX1771 evaluation kit (EV kit) provides a regulated 12V, or adjustable output voltage from an input source as low as 3V. It drives loads up to 0.5A with greater than 80% conversion efficiency.

This EV kit is a fully assembled and tested surface-mount circuit board. Additional pads on the bottom of the board accommodate the external feedback resistors for setting different output voltages.

Applications

  • Battery-Powered Applications
  • Flash Memory Programming
  • High-Power RF Power-Amplifier Supply
  • Palmtops/Handheld Terminals
  • Portable Communicators
  • Positive LCD-Bias Generators

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