ISL62386

High-Efficiency, Quad Output System Power Supply Controller for Notebook Computers

Product Status: Mass Production

OVERVIEW

The ISL62386 controller generates supply voltages for battery-powered systems. The ISL62386 includes two pulse-width modulation (PWM) controllers, adjustable from 0.6V to 5.5V, and two linear regulators, LDO5 and LDO3, that generate a fixed 5V output and a fixed 3.3V output respectively. Each can deliver up to 100mA. The Channel 2 switching regulator will automatically take over the LDO5 load when programmed to 5V output. This provides a large power saving and boosts efficiency. The ISL62386 includes on-board power-up sequencing, one power-good (PGOOD) output, digital soft-start, and an internal soft-stop output discharge that prevents negative voltages on shutdown.

The patented R3 PWM control scheme provides a low jitter system with fast response to load transients. Light-load efficiency is improved with period-stretching discontinuous conduction mode (DCM) operation. To eliminate noise in audio frequency applications, an ultrasonic DCM mode is included, which limits the minimum switching frequency to approximately 28kHz.

The ISL62386 is available in a 32 Ld 5x5 TQFN package, and can operate over the extended temperature range (-10°C to +100°C).

KEY FEATURES

  • High Performance R3 Technology
  • Fast Transient Response
  • ±1% Output Voltage Accuracy: -10°C to +100°C
  • Two Fully Programmable Switch-Mode Power Supplies with Independent Operation
  • Programmable Switching Frequency
  • Integrated MOSFET Drivers and Bootstrap Diode
  • Fixed +3.3V LDO Output with Enable Control
  • Fixed +5V LDO with Automatic Switchover to SMPS2
  • Internal Soft-Start and Soft-Stop Output Discharge
  • Wide Input Voltage Range: +5.5V to +25V
  • Full and Ultrasonic Pulse-Skipping Mode
  • Power-Good Indicator
  • Overvoltage, Undervoltage and Overcurrent Protection
  • Thermal Monitor and Protection
  • Pb-Free (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL62386
Basic Information
Production Status
Mass Production
# of Outputs
4
Input Voltage Min (V)
5.5
Input Voltage Max (V)
25
Output Voltage Min (V)
0.6
Output Voltage 1 Max (V)
5.5
Output Current 1 Max (A)
20
Switching Frequency (kHz)
Programmable
Output Voltage 2 Max (V)
5.5
Output Voltage 3 Max (V)
3.3
Output Voltage 4 Max (V)
5
Linear Output
Yes
DDR Capable
No
Qualification Level
Standard
Can Sample
YES
Temperature Range
-10 to +100

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