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MAX77816

High-Efficiency Buck-Boost Regulator with 5A Switches

98% Efficiency Buck Boost with I²C Interface Delivering >3A of Continuous Output Current

Data Sheet

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Overview

Description

The MAX77816 is a high-current, high-efficiency buck-boost regulator targeting single-cell Li-ion battery-powered applications. It supports a wide output voltage range from 2.60V to 5.14V. The IC allows 5A (TYP) maximum switch current. In buck mode, the output current can go as high as 4A, and in boost mode, the maximum output current can be 3A. A unique control algorithm allows high efficiency, outstanding line/load transient response, and seamless transition between buck and boost modes.

The IC features I²C-compatible serial interface. The I²C interface allows the output voltage to be dynamically adjusted thus enabling finer control of system power consumption. The I²C interface also provides features such as enable control and device status monitoring.

The multifunction GPIO pin is register settable to 5 different options such as FPWM mode enable and inductor peak current level selection. These options provide design flexibility that allows the IC to cover a wide range of applications and use cases.

Design Solution: Boost the Run-Time of Portable Electronics with a One-Two Punch ›

MAX77816: Typical Application Circuit

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Key Features

Buck and Boost Operation Including Seamless Transition between Buck and Boost Modes
- 2.3V to 5.5V V_IN Range
- 2.60V to 5.14V V_OUT with 20mV Step
- 3A Minimum Continuous Output Current (V_INBB ≥ 3.0V, V_OUTBB = 3.3V)
- Burst Current: 3.6A Minimum Output Current for 800μs (V_INBB ≥ 3.0V, V_OUTBB = 3.3V)
I²C Serial Interface Allows Dynamic V_OUT Adjustment and Provides Design Flexibility
97.5% Peak Efficiency
40µA Quiescent Current
Safety Features Enhance Device and System Reliability
- Soft-Start
- True Shutdown^™
- Thermal Shutdown and Short-Circuit Protection
Multifunction GPIO Pin
- MAX77816A/F: FPWM Mode Enable
- MAX77816B: Inductor Peak Current-Limit selection
- MAX77816C: Output Voltage Selection
- MAX77816D: Power-OK indicator
- MAX77816E: Interrupt Indicator
Small Size: 1.827mm × 2.127mm, 20-Bump WLP, 0.4mm Pitch

Applications/Uses

Battery-Powered Applications
RF Power Amplifiers
Smartphones and Tablets
Wearable Devices
Wireless Communication Devices

Parametric Specs

Part Number

V_IN
(V)

V_OUT1
(V)

Preset V_OUT
(V)

V_OUT1 Tolerance
(±%)

I_OUT1
(A)

Output Adjust. Method

Switch Type

Synchronous Switching

Power Good Signal

I_CC
(mA)

DC-DC Outputs

Alternate Topology

Oper. Freq.
(kHz)

Design Tools

Package/Pins

Oper. Temp.
(°C)

Budgetary
Price

min

max

min

max

See Notes

MAX77816

2.3

5.5

2.6

5.14

3.4

Preset

Internal

Yes

Step-Down

Step-Up

2500

EE-Sim

WLP/20

-40 to +85

$1.05 @1k

See All Step-Down/Up Switching Regulators (28)

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.

Design Resources

MAX77816EVKIT: Evaluation Kit for the MAX77816

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

Order

Status:

Package:

Temperature:

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Related Packaging

Tools & Models

EE-Sim: Design & Simulate MAX77816

Tools & Models

Reference Designs

Type	ID	Title
System Board	6880	MAXREFDES1214: Portable 1.5A USB Charger with Micro-USB Input and USB Standard-A Output
Evaluation Board	9558	MAX77816EVKIT Evaluation Kit for the MAX77816

Reference Designs

MAX77816

High-Efficiency Buck-Boost Regulator with 5A Switches

98% Efficiency Buck Boost with I2C Interface Delivering >3A of Continuous Output Current

Description

Key Features

Applications/Uses

Quality and Environmental Data

Additional Resources

Tools & Models

CAD Symbols and Footprints

Related Products

New Products

Related Packaging

Tools & Models

Reference Designs

98% Efficiency Buck Boost with I²C Interface Delivering >3A of Continuous Output Current