ISL9444

Triple, 180° Out-of-Phase, Synchronous Step-Down PWM Controller

Product Status: 量産中

OVERVIEW

The ISL9444 is a triple-output synchronous buck controller that integrates three PWM controllers which are fully featured and designed to provide multi-rail power for use in products such as cable and satellite set-top boxes, VoIP gateways, cable modems, and other home connectivity products as well as a variety of industrial and general purpose applications. Each output is adjustable down to 0.7V. The PWMs are synchronized at 180° out-of-phase, thus reducing the input RMS current and ripple voltage.

The ISL9444 offers independent power-good indicators, programmable soft-start and tracking functions for ease of supply rail sequencing and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package.

Switching frequency can be set between 200kHz and 1200kHz using a resistor. The ISL9444 can be synchronized to another ISL9444 to reduce any beat frequency.

The ISL9444 utilizes internal loop compensation to keep minimum peripheral components for a compact design and a low total solution cost. These devices are implemented with current mode control with feed-forward to cover various applications even with fixed internal compensations.

KEY FEATURES

  • Three Integrated Synchronous Buck PWM Controllers
  • Internal Bootstrap Diodes
  • Independent Programmable Output Voltage
  • Independent Power-Good Indicators, Soft-Starting and Tracking
  • Power Failure Monitor
  • Light Load Efficiency Enhancement
  • Low Ripple Diode Emulation Mode with Pulse Skipping
  • Supports Pre-Biased Output
  • Programmable Frequency: 200kHz to 1200kHz
  • Adaptive Shoot-through Protection
  • Out-of-Phase Switching (0°/180°/0°)
  • No External Current Sense Resistor
  • Uses Lower MOSFET’s rDS(ON)
  • Complete Protection
  • Overcurrent, Overvoltage, Over-Temperature
  • Wide Input Voltage Range: 4.5V to 28V
  • Pb-Free (RoHS Compliant)

PARAMETRICS

Parameters
ISL9444
Basic Information
Production Status
量産中
出力数
3
入力電圧 (V) (min)
4.5
入力電圧 (V) (max)
26
出力電圧 (V) (min)
0.7
出力電圧1 (V) (max)
26
出力電流1 (A) (max)
20
スイッチング周波数 (kHz)
200 to 1200
バイアス電圧 (VCC) (V)
5
出力電流2 (A) (max)
20
出力電圧2 (V) (max)
26
出力電圧3 (V) (max)
26
リニア出力
Yes
DDR対応
No
認定レベル
Standard
バイアス電圧範囲 (V)
5
温度範囲
See Datasheet

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