ISL91107

High Efficiency Buck-Boost Regulator with 3.6A Switches

Product Status: Mass Production

OVERVIEW

The ISL91107 is a highly-integrated buck-boost switching regulator that accepts input voltages either above or below the regulated output voltage. Unlike other buck-boost regulators, this regulator automatically transitions between operating modes without significant output disturbance.

This device is capable of delivering up to 2A of output current (PVIN = 2.8V, VOUT = 3.3V) and provides excellent efficiency due to its fully synchronous 4-switch architecture. No-load quiescent current of only 45μA also optimizes efficiency under light-load conditions.

The ISL91107 is designed for standalone applications and supports 3.3V fixed output voltages or variable output voltages with an external resistor divider. Output voltages as low as 1V or as high as 5.2V are supported using an external resistor divider.

The ISL91107 requires only a single inductor and very few external components. Power supply solution size is minimized by a 2.15mmx1.51mm WLCSP and a 2.5MHz switching frequency, which further reduces the size of external components.

KEY FEATURES

    • Accepts input voltages above or below regulated output voltage
    • Automatic and seamless transitions between Buck and Boost modes
    • Input voltage range: 1.8V to 5.5V
    • Output current: up to 2A (PVIN = 2.8V, VOUT = 3.3V)
    • High efficiency: up to 96%
    • 45μA quiescent current maximizes light-load efficiency
    • 2.5MHz switching frequency minimizes external component size
    • Selectable forced PWM mode
    • Fully protected for short-circuit, over-temperature and undervoltage
    • Small 2.15mmx1.51mm WLCSP

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL91107
Basic Information
Production Status
Mass Production
# of Outputs
1
Topology [Rail 1]
Buck-Boost
Input Voltage Min (V) [Rail 1]
1.8
Input Voltage Max (V) [Rail 1]
5.5
Output Voltage Min (V) [Rail 1]
1
Output Voltage Max (V) [Rail 1]
5.2
Output Current Max (A) [Rail 1]
2
IQ [Rail 1]
45 µA
Switching Freq. (max) (MHz)
2.75
Switching Freq. (min) (MHz)
2.25
Max Duty Cycle (%)
-
Qualification Level
Standard
Peak Efficiency (%)
96
POR
Yes
SYNCH Capability
No
Control Type
Current Mode
Switching Frequency Range (MHz)
2.25 to 2.75MHz
Can Sample
YES
Temperature Range
-40 to +85

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Cross Reference

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Knowledge Base

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Related Boards and Kits

Related Videos

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Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR and ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR and ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.
3:02
Find out how the highly efficient, compact 12V synchronous buck regulator family can meet your power requirements for 12V rails.
9:50
This webinar introduces three buck-boost regulators in QFN packages, ISL91127IR, ISL91107IR and ISL9120IR, for battery-powered portable devices.
3:57
This webinar introduces the ISL85003 and ISL85003A synchronous buck (step-down) regulators with integrated high-side and low-side FETs.
11:01
This webinar introduces the ISL78233, ISL78234 and ISL78235 automotive grade synchronous buck regulators for point-of-load applications.

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