ISL91117

High Efficiency Synchronous Boost Converter with 4.2A Switches and Output Disconnect

OVERVIEW

The ISL91117 is a highly-integrated boost switching regulator for battery powered applications. The device provides a power supply solution for products using dual-cell or three-cell alkaline, NiCd or NiMH, or one-cell
Li-ion or Li-polymer battery.

This device is capable of delivering an output current of 1.5A with PVIN = 3.3V and VOUT = 5V. The use of a synchronous rectifier maximizes efficiency at high loads. No-load quiescent current of only 35µA optimizes efficiency under light-load conditions. Forced PWM and/or synchronization to an external clock may also be selected for noise sensitive applications.

The ISL91117 is designed for standalone applications and supports 5V fixed output voltage or variable output voltages with an external resistor divider. Power supply solution size is minimized by a 2.34mm x 1.72mm WLCSP and a 2.6MHz switching frequency, which allows for the use of tiny, low-profile inductors and ceramic capacitors to minimize the size of the solution.

KEY FEATURES

  • Input voltage range: 1.8V to 4.8V
  • Fixed 5V or adjustable output
  • Output current: up to 1.5A (PVIN = 3.3V,
    VOUT = 5V)
  • High efficiency: up to 96%
  • 35µA quiescent current maximizes light-load efficiency
  • True input-output disconnect when disabled
  • 2.6MHz switching frequency minimizes external component size
  • Selectable forced-PWM mode and external synchronization
  • Fully protected for short-circuit, over-temperature and undervoltage
  • Small 2.34mm x 1.72mm WLCSP

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL91117
Basic Information
生产状态
Mass Production
iSim模型
YES
拓扑
Boost
输出数量
1
输入电压最小值 (V)
1.8
输入电压最大值 (V)
4.8
输出电压最小值 (V)
2
输出电压最大值 (V)
5
输出电流最大值 (A)
1.5
IQ
27.5 µA
开关频率 (最大值) (MHz)
2.9
开关频率 (最小值) (MHz)
2.4
最大占空比 (%)
-
资质级别
Standard
峰值效率 (%)
96
POR
Yes
SYNCH功能
Yes
控制类型
Current Mode
开关频率范围 (MHz)
2.4 to 2.9MHz
CAN 采样
YES
温度范围
-40 to +85

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