ISL91107

High Efficiency Buck-Boost Regulator with 3.6A Switches

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

PARAMETRICS

Parameters
ISL91107
Basic Information
Production Status
量産中
トポロジ
Buck-Boost
出力数
1
入力電圧 (V) (min)
1.8
入力電圧 (V) (max)
5.5
出力電圧 (V) (min)
1
出力電圧 (V) (max)
5.2
出力電流 (A) (max)
2
IQ
45 µA
スイッチング周波数 (max) (MHz)
2.75
スイッチング周波数 (min) (MHz)
2.25
最大デューティサイクル (%)
-
認定レベル
Standard
ピーク効率 (%)
96
POR
Yes
SYNCH機能
No
制御タイプ
Current Mode
スイッチング周波数範囲 (MHz)
2.25 to 2.75MHz
CANサンプル
YES
温度範囲
-40 to +85

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