ISL8502A

2A Synchronous Buck Regulator with Integrated MOSFETs

OVERVIEW

The ISL8502A is a synchronous buck controller with internal MOSFETs packaged in a small 4mmx4mm QFN package. The ISL8502A can support a continuous load of 2A and has a very wide input voltage range. With the switching MOSFETs integrated into the IC, the complete regulator footprint can be very small and provide a much more efficient solution than a linear regulator.

The ISL8502A is capable of stand-alone operation or it can be used in a master slave combination for multiple outputs that are derived from the same input rail. Multiple slave channels (up to six) can be synchronized. This method minimizes the EMI and beat frequencies effect with multi-channel operation.

The switching PWM controller drives two internal N-Channel MOSFETs in a synchronous-rectified buck converter topology. The synchronous buck converter uses voltage-mode control with fast transient response. The switching regulator provides a maximum static regulation tolerance of ±1% over line, load, and temperature ranges. The output is user-adjustable by means of external resistors down to 0.6V.

The output is monitored for undervoltage events. The switching regulator also has overcurrent protection. Thermal shutdown is integrated. The ISL8502A features a bi-directional Enable pin that allows the part to pull the enable pin low during fault detection.

PGOOD delay for ISL8502A has been decreased to 1ms typical (at 500kHz switching frequency) compared to 250ms (at 500kHz) for ISL8502.

KEY FEATURES

  • Up to 2A Continuous Output Current
  • Integrated MOSFETs for Small Regulator Footprint
  • Adjustable Switching Frequency, 500kHz to 1.2MHz
  • Tight Output Voltage Regulation, ±1% Over-temperature
  • Wide Input Voltage Range, 5V ±10% or 5.5V to 14V
  • Wide Output Voltage Range, from 0.6V
  • Simple Single-Loop Voltage-Mode PWM Control Design
  • Input Voltage Feed-Forward for Constant Modulator Gain
  • Fast PWM Converter Transient Response
  • Lossless rDS(ON) High Side and Low Side Overcurrent Protections
  • Undervoltage Detection
  • Integrated Thermal Shutdown Protection
  • Power-Good Indication
  • Adjustable Soft-Start
  • Start-Up with Pre-Bias Output
  • Pb-free (RoHS Compliant)

PARAMETRICS

Parameters
ISL8502A
Basic Information
Production Status
量産中
iSimモデル
YES
トポロジ
Buck
出力数
1
入力電圧 (V) (min)
4.5
入力電圧 (V) (max)
14
出力電圧 (V) (min)
0.6
出力電圧 (V) (max)
14
出力電流 (A) (max)
2
スイッチング周波数 (max) (MHz)
1.2
スイッチング周波数 (min) (MHz)
0.5
最大デューティサイクル (%)
See Datasheet
認定レベル
Standard
ピーク効率 (%)
95
POR
Yes
SYNCH機能
Yes
制御タイプ
Voltage Mode
スイッチング周波数範囲 (MHz)
0.5 to 1.2
CANサンプル
YES
温度範囲
-40 to +85

ブロック図

上記downloadには必ず下のボタンより契約内容を御確認ください。

MyRenesasボタンよりID,PWをご入力ください。