ISL9112

1.2A High Efficiency Buck-Boost Regulators

Product Status: Mass Production

OVERVIEW

The ISL9110 and ISL9112 are highly-integrated Buck-Boost switching regulators that accept input voltages either above or below the regulated output voltage. Unlike other Buck-Boost regulators, these regulators automatically transition between operating modes without significant output disturbance.

Both parts are capable of delivering up to 1.2A output current, and provide excellent efficiency due to their fully synchronous 4-switch architecture. No-load quiescent current of only 35µA also optimizes efficiency under light-load conditions. Forced PWM and/or synchronization to an external clock may also be selected for noise sensitive applications.

The ISL9110 is designed for standalone applications and supports 3.3V and 5V 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 ISL9112 supports a broader set of programmable features that may be accessed via an I2 C bus interface. With a programmable output voltage range of 1.9V to 5V, the ISL9112 is ideal for applications requiring dynamically changing supply voltages. A programmable slew rate can be selected to provide smooth transitions between output voltage settings.

The ISL9110 and ISL9112 require only a single inductor and very few external components. Power supply solution size is minimized by a tiny 3mmx3mm package 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 1.2A
  • High Efficiency: Up to 95%
  • 35µA Quiescent Current Maximizes Light-load Efficiency
  • 2.5MHz Switching Frequency Minimizes External Component Size
  • Selectable Forced-PWM Mode and External Synchronization
  • I2C Interface (ISL9112)
  • Fully Protected for Overcurrent, Over-temperature and Undervoltage
  • Small 3mmx3mm TDFN Package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9112
Basic Information
生产状态
Mass Production
输出数量
1
拓扑 [Rail 1]
Buck-Boost
输入电压最小值 (V) [Rail 1]
1.8
输入电压最大值 (V) [Rail 1]
5.5
输出电压最小值 (V) [Rail 1]
1.9
输出电压最大值 (V) [Rail 1]
5
输出电流最大值 (A) [Rail 1]
1.2
IQ [Rail 1]
35 µA
开关频率 (最大值) (MHz)
2.75
开关频率 (最小值) (MHz)
2.25
最大占空比 (%)
-
资质级别
Standard
峰值效率 (%)
95
POR
Yes
BOM总占用面积 (mm2)
9
SYNCH功能
Yes
控制类型
Current Mode
开关频率范围 (MHz)
2.5
CAN 采样
YES
温度范围
-40 to +85

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