MAX77887

RECOMMENDED FOR NEW DESIGNS

Nano Power Buck-Boost with Input Voltage Monitor

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

1.8V to 5.5V Input Voltage
Output Voltage from 1.8V to 5.2V
Peak Efficiency of 92.5% (5.5V_IN, 3.8V_OUT)
430nA Typical Quiescent Current
10nA Shutdown Current
R_SEL Configurations
- Output Voltage
- 400mA/200mA Switching Current Limit
- 16 Input Voltage Monitoring Threshold Levels

Protection Features
- Input Undervoltage Lockout (UVLO)
- Switching Current Limit
- Thermal Shutdown (THS)
1.36mm x 1.36mm, 9-Bump, 0.4mm Pitch, WLP

The MAX77887 is a high-efficiency nano power buckboost converter with an input voltage monitoring feature, ensuring that the battery voltage does not drop below the pre-set threshold levels to protect the battery.

The converter operates on an input supply between 1.8V and 5.5V. Output voltage between 1.8V and 5.2V is configured through a resistor connected to the hardware control pin, R_SEL1. It can operate in CCM, Skip, and Low Power Mode to ensure maximum efficiency over a wide range of load currents.

MAX77887 offers two unique hardware control pins R_SEL1 and _SEL2. The resistor connected at SEL1 (R_SEL1) selects the predefined output voltage from 1.8V to 5.2V as OUT. The resistor connected at SEL2 (R_SEL2) allows the configuration of two different Switching Current Limit (I_LIM) levels and 16 Input Voltage Monitoring Threshold levels.

The MAX77887 is available in 1.36mm x 1.36mm, 9- bump, 0.4mm pitch, wafer-level package (WLP).

APPLICATIONS

LPWAN SoC Companion Power Solution
IoT and Wearable Applications
Asset Trackers
Smart Meters

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX77887: Nano Power Buck-Boost with Input Voltage Monitor Data Sheet (Rev.0) 03/12/2024

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX77887AEWL+	9-WLCSP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX77887AEWL+T	9-WLCSP-N/A	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for MAX77887

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Features and Benefits

Output Voltage (OUT1) Adjustable Using R_SEL1
Test Points for INS and OUTS
Switching Current Limit, Input Voltage Monitor Levels
Sense Sockets for High-Accuracy Measurements

Product Details

The MAX77887 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77887 nano power buck-boost converter. The IC has an input range of 1.8V to 5.5V, with a switching current limit of 400mA.

The IC has two hardware control pins, SEL1 and SEL2. The resistor connected at SEL1 (R_SEL1) selects a predefined output voltage level between 1.8V to 5.2V. The resistor at SEL2 (R_SEL2) allows to configure the two different switching current limit levels (ILIM), and 16 input voltage monitoring threshold levels.

The EV kit is compatible with the MAX77887 WLP IC (MAX77887AEWL+T) and equipped with test points and jumpers for testing most of the functionality of the device. There are probing sockets on critical nodes (OUT, LX1, and LX2) for precise measurements.

Resources

MAX77887EVKIT Gerber Files
3/12/2024

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