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Maxim Integrated MAX17271ETE

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

Overview

TopologyBuck-Boost Converter
Input voltage2.7-5.5 V
Switching frequency1000 kHz
Output 11.2 V / 1.1 A
Output 21.8 V / 1.1 A
Output 31 V / 1.1 A
IC revision3

Description

The MAX17270/MAX17271 are 3-output switchingregulators designed for applications requiring efficientregulation of multiple supplies in a very small space, suchas wearable electronic devices.The parts use a buck-boost architecture that regulatesthree outputs using a single, small 2.2μH inductor atefficiencies up to 85%. This results in smaller board spacewhile delivering better total system efficiency than equivalentpower solutions using one buck and linear regulators.The supply current is 0.85μA when only one output isenabled, plus 0.2μA for each additional output enabled.This SIMO (Single-Input Multiple Output) regulator utilizesthe entire battery voltage range due to its ability to createoutput voltages that are above, below, or equal to theinput voltage. Peak inductor current for each output isprogrammable to optimize the balance between efficiency,output ripple, EMI, PCB design, and load capability.Two versions are available. The MAX17270 has 3 enableinputs and 3 output voltage programming inputs. TheMAX17271 includes an I2C interface with interrupt, apush-button turn on/off, and a power-good indication.The MAX17272/MAX17273 are 2-output versions ofMAX17270/MAX17271, respectively.All versions are offered in either a 4 x 4, 0.4mm waferlevelpackage (WLP) or a 16-pin TQFN package.

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

Typical applications

  • Watches / Wearables
  • Bluetooth Headsets
  • Fitness Bands

Products

Order Code Data­sheet Downloads Product seriesL1
(µH)
IR 1
(mA)
IR 2
(mA)
ISAT 1
(mA)
RDC1 typ
(mΩ)
RDC max.
(mΩ)
fres 1
(MHz)
VersionL
(µH)
IR
(A)
ISAT
(mA)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74479299222SPEC
9 files WE-PMCI Power Molded Chip Inductor 2.2 1500 2100 3500 85 106 25 High Saturation Current 2.2 3500 85 106 25 SMT
74438357022SPEC
9 files WE-MAPI SMT Power Inductor SMT 2.2 5.2 7000 22 26 35 SMT
Order Code Data­sheet
74479299222SPEC
74438357022SPEC
Samples
Order Code Data­sheet Downloads Product seriesL1
(µH)
IR 1
(mA)
IR 2
(mA)
ISAT 1
(mA)
RDC1 typ
(mΩ)
RDC max.
(mΩ)
fres 1
(MHz)
VersionL
(µH)
IR
(A)
ISAT
(mA)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples