ISL6443A

300kHz Dual, 180° Out-of-Phase, Step-Down PWM and Single Linear Controller

OVERVIEW

The ISL6443A is a high-performance, triple-output controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized at 180° out of phase, thus reducing the RMS input current and ripple voltage.

The ISL6443A incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1SD1 and SD2 ).

A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point and the linear regulator output is greater than 75% of its setpoint. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.

KEY FEATURES

  • Wide Input Supply Voltage Range
  • Variable 5.6V to 24V
  • Fixed 4.5V to 5.6V
  • Three Independently Programmable Output Voltages
  • Switching Frequency 300kHz
  • Out of Phase PWM Controller Operation
  • Reduces Required Input Capacitance and Power Supply Induced Loads
  • No External Current Sense Resistor
  • Uses Lower MOSFET's rDS(ON)
  • Bidirectional Frequency Synchronization for Synchronizing Multiple ISL6443As
  • Programmable Soft-Start
  • Extensive Circuit Protection Functions
  • PGOOD
  • UVLO
  • Overcurrent
  • Over-temperature
  • Independent Shutdown for Both PWMs
  • Excellent Dynamic Response
  • Voltage Feed-Forward with Current Mode Control
  • QFN Packages:
  • QFN - Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat No Leads - Package Outline
  • Near Chip Scale Package Footprint, which Improves PCB Efficiency and has a Thinner Profile
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL6443A
Basic Information
生产状态
Mass Production
输出数量
3
输入电压最小值 (V)
4.5
输入电压最大值 (V)
24
输出电压最小值 (V)
0.8
输出电压1最大值 (V)
24
输出电流1最大值 (A)
10
开关频率 (kHz)
300
偏置电压 (VCC) (V)
5
输出电流2最大值 (A)
10
输出电压2最大值 (V)
24
输出电压3最大值 (V)
Adj.
线性输出
Yes
支持DDR
No
资质级别
Standard
偏置电压范围 (V)
5
CAN 采样
YES
温度范围
-40 to +85

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