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5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6μA IQ

High Efficiency, Low IQ Buck-Boost Converter

Product Details

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.3
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 1.5
Switch Type Internal
Preset VOUT (V) 3.3
VOUT1 Tolerance (±%) 1
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 1
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 2500
Design Tools EE-Sim
Package/Pins FC2QFN/14
WLP/12
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.58
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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 1.8
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.3
VOUT1 (V) (max) 5.3
IOUT1 (A) (max) 1.5
Switch Type Internal
Preset VOUT (V) 3.3
VOUT1 Tolerance (±%) 1
Output Adjust. Method Preset
Resistor
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (max) 1
# DC-DC Outputs 1
Alternate Topology Step-Down
Step-Up
Switching Frequency (kHz) 2500
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=12260', '')
Package/Pins FC2QFN/14
WLP/12
Oper. Temp. (°C) -40 to +125
Budgetary
Price (See Notes)
0.58

Key Features

  • 1.8V to 5.5V Input Voltage Range
  • 2.3V to 5.3V Single Resistor Adjustable Output Voltage
  • 1.6A Maximum Output Current (3.1A ILIM Option, Buck Mode)
  • 900mA Maximum Output Current (1.8A ILIM Option, Boost Mode 3.0VIN, 3.3VOUT)
  • 96% Peak Efficiency (3.3VIN, 3.3VOUT)
  • SKIP Mode for Higher Light-Load Efficiency
  • 6μA Ultra-Low Typical Quiescent Current (At TJ = +25°C)
  • 2.5MHz Nominal Switching Frequency
  • Enable Pin
  • GPIO Pins for System Design Convenience
    • FPWM (Forced PWM) Mode Selection Pin
    • POK Indicator Pin
  • UVLO, Soft-Start, Active-Output Discharge, Overcurrent, and Thermal Shutdown Protections
  • 1.61mm x 2.01mm, 12-Bump WLP
  • 2.5mm x 2.5mm, 14-Lead FC2QFN

Applications/Uses

  • 1-Cell Li+ Battery Powered Equipment
  • Smartphones/Portable/Wearables
  • Internet of Things (IoT) Devices
  • LPWAN (LTE/NB-IoT, LTE/Cat-M1)

Description

The MAX77827 is a high-efficiency buck-boost regulator targeted for one-cell Li-ion powered applications with the lowest typical quiescent current in the industry of 6μA. It supports input voltages of 1.8V to 5.5V and an output voltage range of 2.3V to 5.3V. The IC provides two different switching current levels (1.8A and 3.1A) to optimize external component sizing based on given load current requirements. With the 1.8A switching current-limit option, the IC can support up to 1.0A load current in buck mode and 900mA in boost mode (VIN = 3.0V, VOUT = 3.3V).

The peak efficiency of 96% makes the IC one of the best solutions as a DC/DC converter to supply a rail for battery-powered portable applications.

The IC features an adjustable output voltage, which can be programmed from 2.3V to 5.3V through a single resistor. Two GPIO pins are available to support force PWM enable function and power-OK (POK) indicator. A unique control algorithm allows high-efficiency, outstanding line/load transient response, and seamless transition between buck and boost modes. These options provide design flexibility that allow the IC to cover a wide range of applications and use cases while minimizing board space.

The MAX77827 is available in a 1.61mm x 2.01mm, 12-bump wafer-level package (WLP), and a 2.5mm x 2.5mm, 14-lead FC2QFN package.

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Simplified Block Diagram

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .