MAX77801

High efficiency buck boost converter/regulator

2A High-Efficiency Buck and Boost Operating Including Seamless Transition Between Buck and Boost Mode


Description

The MAX77801 is a high-current, high-efficiency buck-boost targeted to mobile applications that use a Li-ion battery or similar chemistries. The MAX77801 utilizes a four-switch H-bridge configuration to support buck and boost operating modes. Buck-boost provides 2.60V to 4.1875V of output voltage range and up to 2A output current.

A unique control algorithm allows high efficiency, outstanding performances in line/load transient response, and seamless transition between buck and boost modes.

DVS (dynamic voltage scaling) input allows the host processor to switch between two preprogrammed output voltages. This feature minimizes power loss for given load conditions. The ramp-up and ramp-down slew rates are programmable through I²C.

The MAX77801 features I²C-compatible, 2-wire serial interface consisting of a bidirectional serial-data line (SDA) and a serial-clock line (SCL). It supports SCL clock rates up to 3.4MHz.

MAX77801: Typical Application Circuit High efficiency, high current buck boost regulator with I2C interface typical application circuit Enlarge+

Key Features

  • 2A High-Efficiency Buck and Boost Operation Including Seamless Transition Between Buck and Boost Mode
  • Flexibility Supports Various Designs
    • VOUT Range from 2.60V to 4.1875V with 12.5mV Step
    • High-Speed (Up to 3.4MHz) I²C Serial Interface
  • Low Quiescent Current, High Efficiency, and Dynamic Voltage Scaling Enable System to Be More Efficient
    • DVS Input
    • Up to 97% of Peak Efficiency
    • 55μA Quiescent Current
  • High Switching Frequency and Small Package Reduce Solution Size
    • 2.5MHz Switching Frequency
    • 20-Bump WLP (0.4mm Pitch)
  • Safety Features Enhance Device and System Reliability
    • POK Output
    • Soft-Start
    • True Shutdown™
    • Thermal Shutdown and Short-Circuit Protection

Applications/Uses

  • Battery-Powered Applications
  • Smartphones and Tablets
Part Number VIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
IOUT1
(A)
Output Adjust. Method Switch Type Synchronous Switching Power Good Signal DC-DC Outputs Alternate Topology Oper. Freq.
(kHz)
Package/Pins Budgetary
Price
min max min max max See Notes
MAX77801  2.3 5.5 2.6 4.1875
3.3
3.4
2 Preset Internal Yes Yes 1
Step-Down
Step-Up
2500
WLP/20
$1.10 @1k
See All Step-Up/Down Switching Regulators (15)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX77801EVKIT: Evaluation Kit for MAX77801

Technical Documents

Tutorial 660 Regulator Topologies for Battery-Powered Systems

Quality and Environmental Data

Product Reliability Reports: MAX77801.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

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