MAX856
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MAX856

3.3V/5V or Adjustable Output, Step-Up DC-DC Converters

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 6
1ku List Price Starting From $3.27
Features
  • 0.8V to 6.0V Input Supply Voltage
  • 0.8V Typ Start-Up Supply Voltage
  • 85% Efficiency at 100mA
  • 25µA Quiescent Current
  • 1µA Shutdown Mode
  • 125mA and 500mA Switch-Current Limits Permit Use of Low-Cost Inductors
  • Up to 500kHz Switching Frequency
  • ±1.5% Reference Tolerance Over Temperature
  • Low-Battery Detector (LBI/LBO)
  • 8-Pin SO and µMax Packages
Additional Details
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The MAX856-MAX859 are high-efficiency, CMOS, step-up, DC-DC switching regulators for small, low input voltage or battery-powered systems. The MAX856/MAX858 accept a positive input voltage between 0.8V and VOUT and convert it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX857/MAX859 adjustable versions accept 0.8V to 6.0V input voltages and generate higher adjustable output voltages in the 2.7V to 6.0V range. Typical efficiencies are greater than 85%. Typical quiescent supply current is 25µA (1µA in shutdown).

The MAX856-MAX859 combine ultra-low quiescent supply current and high efficiency to give maximum battery life. An internal MOSFET power transistor permits high switching frequencies. This benefit, combined with internally set peak inductor current limits, permits the use of small, low-cost inductors. The MAX856/MAX857 have a 500mA peak inductor current limit. The MAX858/MAX859 have a 125mA peak inductor current limit.

Applications

  • 2-Cell and 3-Cell Battery-Operated Equipment
  • 3.3V to 5V Step-Up Conversion
  • Glucose Meters
  • Medical Instrumentation
  • Palmtop Computers
  • Personal Data Communicators/Computers
  • Portable Data-Collection Equipment
Part Models 6
1ku List Price Starting From $3.27

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX856CSA+
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MAX856CSA+T
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MAX856CUA+
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MAX856CUA+T
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MAX856ESA+
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MAX856ESA+T
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Filter by Model

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Part Models

Product Lifecycle

PCN

May 22, 2018

- 1702N

ASSEMBLY

MAX856CSA+

PRODUCTION

MAX856CSA+T

PRODUCTION

Sep 19, 2018

- 1753N

ASSEMBLY

MAX856CUA+

PRODUCTION

MAX856CUA+T

PRODUCTION

Oct 30, 2020

- 1702R2

ASSEMBLY

MAX856ESA+

PRODUCTION

MAX856ESA+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

May 22, 2018

- 1702N

arrow down

ASSEMBLY

MAX856CSA+

PRODUCTION

MAX856CSA+T

PRODUCTION

Sep 19, 2018

- 1753N

arrow down

ASSEMBLY

MAX856CUA+

PRODUCTION

MAX856CUA+T

PRODUCTION

Oct 30, 2020

- 1702R2

arrow down

ASSEMBLY

MAX856ESA+

PRODUCTION

MAX856ESA+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX856EVKIT

Evaluation Kit for the MAX856

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MAX856EVKIT

Evaluation Kit for the MAX856

Evaluation Kit for the MAX856

Features and Benefits

  • Low 0.8V to 6V Input Supply Voltage
  • New µMAX® Package
  • 85% Efficiency at 100mA
  • 25µA Quiescent Current
  • 1µA Shutdown Mode
  • 125mA and 500mA Switch Current Limits Permit Use of Low-Cost Inductors
  • Up to 500kHz Switching Frequency
  • ±1.5% Reference Tolerance Over Temperature
  • Low-Battery Detector (LBI/LBO)
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Detail

The MAX856 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed circuit board. It can also evaluate the MAX858 or the adjustable-output MAX857/MAX859.

The MAX856—MAX859 are CMOS, step-up, DC-DC switching regulators for small, low input voltage or battery-powered systems. The MAX856/MAX858 accept a positive input voltage between 0.8V and 6V and convert it to a higher, pin-selectable output voltage of 3.3V or 5V. The MAX857/MAX859 adjustable versions accept 0.8V to 6V input voltages and generate a higher, adjustable output voltage in the 2.7V to 6V range. Typical full-load efficiencies for the MAX856-MAX859 are greater than 85%.

A movable jumper on the EV kit selects either a 3.3V or 5.0V output voltage. Additional pads on the board's solder side accommodate resistors for the LBI/LBO low-battery detector or MAX857/MAX859 output adjustment.

Applications

  • 2-Cell and 3-Cell Battery-Operated Equipment
  • 3.3V to 5V Step-Up Conversion
  • Glucose Meters
  • Medical Instrumentation
  • Palmtop Computers
  • Personal Data Communicators/Computers
  • Portable Data-Collection Equipment

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