ISL78236

Dual 3A Current Sharing 2.5MHz High Efficiency Synchronous Buck Regulator

Product Status: Mass Production

OVERVIEW

The ISL78236 is a dual output, 3A/3A, integrated FET buck regulator for point-of-load power applications. The supply voltage range is from 2.8V to 6V, allowing for the use of a single Li+ cell, three NiMH cells, or a regulated 3V/5V bus input. It is optimized for regulating output voltages down to 1.2V. Each channel provides an output current up to 3A, which can be combined to form a single 6A output in current sharing mode. The two channels operate 180° out of phase to reduce input RMS current and EMI.

The ISL78236 integrates a pair of low ON-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and minimize external component count. It can operate up to 100% duty cycle to maximize operating life as battery voltage drops out. When supplying 3A on each channel, the 100% duty cycle operation limits the dropout voltage to less than 250mV. Other features include internal digital soft-start, independent channel enable for power sequencing, overcurrent protection, and thermal shutdown.

The ISL78236 is offered in a 24 Ld 4mmx4mm QFN package with 1mm maximum height. The complete converter occupies less than 1.5cm2 area.

The ISL78236 is AEC - Q100 qualified and is rated for the automotive temperature range (-40°C to +105°C).

KEY FEATURES

  • Dual 3A/3A independent outputs
  • 2.5MHz synchronous buck regulator with internal MOSFETs up to 95% efficiency
  • 2% voltage reference accuracy over-temperature
  • 6A current sharing mode operation
  • Internal or external compensation
  • Peak current limiting and hiccup mode short circuit protection
  • Reverse overcurrent protection
  • Over-temperature protection shutdown
  • AEC-Q100 qualified

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78236
Basic Information
生产状态
Mass Production
输出数量
2
拓扑 [Rail 1]
Buck
输入电压最小值 (V) [Rail 1]
2.85
输入电压最大值 (V) [Rail 1]
6
输出电压最小值 (V) [Rail 1]
1.2
输出电压最大值 (V) [Rail 1]
6
输出电流最大值 (A) [Rail 1]
6
IQ [Rail 1]
30 µA
开关频率 (最大值) (MHz)
2.5
开关频率 (最小值) (MHz)
2.15
最大占空比 (%)
See Datasheet
资质级别
Automotive
峰值效率 (%)
95
POR
Yes
BOM总占用面积 (mm2)
150
SYNCH功能
Yes
控制类型
Current Mode
开关频率范围 (MHz)
2.15 to 2.85
CAN 采样
YES
温度范围
-40 to +105

Action Needed