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nanoPower Triple-Output, Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator

NanoPower SIMO Buck Boost Converter. The Simplest Solution to Replace Clusters of Power Rails

Product Details

The MAX17270/MAX17271 are 3-output switching regulators designed for applications requiring efficient regulation of multiple supplies in a very small space, such as wearable electronic devices.

The parts use a buck-boost architecture that regulates three outputs using a single, small 2.2μH inductor at efficiencies up to 85%. This results in smaller board space while delivering better total system efficiency than equivalent power solutions using one buck and linear regulators.

The supply current is 0.85μA when only one output is enabled, plus 0.2μA for each additional output enabled.

This SIMO (Single-Input Multiple-Output) regulator utilizes the entire battery voltage range due to its ability to create output voltages that are above, below, or equal to the input voltage. Peak inductor current for each output is programmable to optimize the balance between efficiency, output ripple, EMI, PCB design, and load capability.

Two versions are available. The MAX17270 has 3 enable inputs and 3 output voltage programming inputs. The MAX17271 includes an I2C interface with interrupt, a push-button turn on/off, and a power-good indication.

All versions are offered in either a 4 x 4, 0.4mm wafer-level package (WLP) or a 16-pin TQFN package.

Design Solution: Choose a Tailored SIMO PMIC for Your Portable Design ›

Key Features

  • 3-Output Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator
  • 2.7V to 5.5V Input Voltage Range
  • Low-Power and Long Battery Life
    • 1.3µA Operating Current (3 SIMO Channels)
    • 330nA Shutdown Current
    • 85% Efficiency at 3.3V Output
  • Flexible and Configurable
    • I2C Compatible Interface (MAX17271)
    • Programmable Output Voltage: 0.8V to 5.175V MAX17270/MAX17271
    • Programmable Peak Current Limit
  • Robust
    • Soft-Start
    • Overload Protection
    • Thermal Protection
  • Small Size
    • 1.77mm x 1.77mm x 0.50mm, 16-Bump 0.4mm-Pitch WLP Package
    • 3mm x 3mm x 0.75mm, 16-pin TQFN Package
    • Small Total Solution Size

Applications/Uses

  • Bluetooth Headsets
  • Fitness Bands
  • Health Monitors
  • Hearables
  • Internet of Things (IoT)
  • Watches
  • Wearables
Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.175
IOUT1 (A) (max) 0.08
Switch Type Internal
VOUT1 Tolerance (±%) 2
Output Adjust. Method -
Synchronous Switching? Yes
ICC (mA) (max) 0.0015
# DC-DC Outputs 3
Alternate Topology Step-Down
Step-Up
Design Tools EE-Sim
Package/Pins THIN WLP/16
TQFN/16
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$2.04 @1k
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Simplified Block Diagram

MAX17270, MAX17271: Simplified Application Circuit MAX17270, MAX17271: Simplified Application Circuit Zoom icon

Technical Docs

Design & Development

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Description

The MAX17271 evaluation kit (EV kit) evaluates the MAX17271. The MAX17271 is a 3-output switching regulator that regulates three outputs using a single, small 2.2μH inductor. The MAX17271 includes an I2C interface to configure the output voltages.

The MAX17271 EV kit features two independent circuits to evaluate two different IC packages of the MAX17271. Both circuits on the EV kit operates over an input range of 2.7V to 5.5V. Each circuit features an I2C interface to set the three output channels to voltages from 0.8V to 5.175V for each output channel. Each circuit output on the EV kit delivers up to 50mA/75mA/80mA of current depending on the input voltage to the output voltage ratio.

The MAX17271 EV kit includes a graphical user interface (GUI) that provides communication over I2C with an onboard IC.

The EV kit comes with the MAX17271ETE+ and the MAX17271ENE+ installed.

View Details

Features

  • Two Independent Circuits on One Board
    • Evaluates the MAX17271 IC in a 16-pin TQFN
    • Evaluates the MAX17271 IC in a 4 x 4 Bump, 0.4mm Pitch WLP
  • Two Independent On-board I2C Interface Circuits
  • Windows XP, Windows 7/8/8.1/10-Compatible Software
  • 2.7V to 5.5V Input Range
  • 0.8V to 5.175V Configurable Output Voltage
  • Up to 50mA/75mA/80mA Output Current
  • Proven 4-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

Description

The MAX17270 evaluation kit (EV kit) evaluates the MAX17270. The MAX17270 is a 3-output switching regulator that regulates three outputs using a single, small 2.2µH inductor.

The MAX17270 EV kit features two independent circuits to evaluate two different IC packages of the MAX17270. Both circuits on the EV kit operates over an input range of 2.7V to 5.5V. Each circuit provides three jumper-configurable outputs, with voltages from 0.8V to 5V for each output channel. Each circuit output on the EV kit delivers up to 50mA/75mA/80mA of current depending on the input voltage to the output voltage ratio.

The EV kit comes with the MAX17270ETE+ and the MAX17270ENE+ installed.

View Details

Features

  • Two Independent Circuits on One Board
    • Evaluates the MAX17270 IC in a 16-pin TQFN
    • Evaluates the MAX17270 IC in a 4 x 4 Bump,
      0.4mm Pitch WLP
  • 2.7V to 5.5V Input Range
  • 0.8V to 5V Configurable Output Voltage
  • Up to 50mA/75mA/80mA Output Current
  • Proven 4-Layer 1oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assemble and Tested

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Tools & Models

EE-Sim: Design & Simulate MAX17271

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Support & Training

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Parameters

Parametric specs for Step-Down/Up Switching Regulators
VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 5.175
IOUT1 (A) (max) 0.08
Switch Type Internal
VOUT1 Tolerance (±%) 2
Output Adjust. Method -
Synchronous Switching? Yes
ICC (mA) (max) 0.0015
# DC-DC Outputs 3
Alternate Topology Step-Down
Step-Up
Design Tools EE-Sim
Package/Pins THIN WLP/16
TQFN/16
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$2.04 @1k

Key Features

  • 3-Output Single-Inductor, Multiple-Output (SIMO) Buck-Boost Regulator
  • 2.7V to 5.5V Input Voltage Range
  • Low-Power and Long Battery Life
    • 1.3µA Operating Current (3 SIMO Channels)
    • 330nA Shutdown Current
    • 85% Efficiency at 3.3V Output
  • Flexible and Configurable
    • I2C Compatible Interface (MAX17271)
    • Programmable Output Voltage: 0.8V to 5.175V MAX17270/MAX17271
    • Programmable Peak Current Limit
  • Robust
    • Soft-Start
    • Overload Protection
    • Thermal Protection
  • Small Size
    • 1.77mm x 1.77mm x 0.50mm, 16-Bump 0.4mm-Pitch WLP Package
    • 3mm x 3mm x 0.75mm, 16-pin TQFN Package
    • Small Total Solution Size

Applications/Uses

  • Bluetooth Headsets
  • Fitness Bands
  • Health Monitors
  • Hearables
  • Internet of Things (IoT)
  • Watches
  • Wearables

Description

The MAX17270/MAX17271 are 3-output switching regulators designed for applications requiring efficient regulation of multiple supplies in a very small space, such as wearable electronic devices.

The parts use a buck-boost architecture that regulates three outputs using a single, small 2.2μH inductor at efficiencies up to 85%. This results in smaller board space while delivering better total system efficiency than equivalent power solutions using one buck and linear regulators.

The supply current is 0.85μA when only one output is enabled, plus 0.2μA for each additional output enabled.

This SIMO (Single-Input Multiple-Output) regulator utilizes the entire battery voltage range due to its ability to create output voltages that are above, below, or equal to the input voltage. Peak inductor current for each output is programmable to optimize the balance between efficiency, output ripple, EMI, PCB design, and load capability.

Two versions are available. The MAX17270 has 3 enable inputs and 3 output voltage programming inputs. The MAX17271 includes an I2C interface with interrupt, a push-button turn on/off, and a power-good indication.

All versions are offered in either a 4 x 4, 0.4mm wafer-level package (WLP) or a 16-pin TQFN package.

Design Solution: Choose a Tailored SIMO PMIC for Your Portable Design ›

Simplified Block Diagram

MAX17270, MAX17271: Simplified Application Circuit MAX17270, MAX17271: Simplified Application Circuit Zoom icon

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