ISL8104

Synchronous Buck Pulse-Width Modulator (PWM) Controller

OVERVIEW

The ISL8104 is a 8V to 14V synchronous PWM controller with integrated MOSFET drivers. The controller features the ability to safely start-up into prebiased output loads and provides protection against overcurrent fault events. Overcurrent protection is implemented using top-side MOSFET rDS(ON) sensing, eliminating the need for a current sensing resistor.

The ISL8104 employs voltage-mode control with dual-edge modulation to achieve fast transient response. The operating frequency is adjustable from 50kHz to 1.5MHz with full (0% to 100%) PWM duty cycle capability. The error amplifier features a 15MHz (typ) gain-bandwidth product and 6V/µs slew rate enabling high converter bandwidth.

The output voltage of the converter can be regulated to as low as 0.597V with a tolerance of ±1.0% over the commercial temperature range (0°C to +70°C), and ±1.5% over industrial temperature range (-40°C to +85°C). Provided in the QFN package, a SS pin and REFIN pin enable supply sequencing and voltage tracking functionality.

KEY FEATURES

  • +8V ±5% to +14V ±10% Bias Voltage Range
  • 1.5V to 15.4V Input Voltage Range
  • 0.597V Internal Reference Voltage
  • ±1.0% Over the Commercial Temperature Range
  • ±1.5% Over the Industrial Temperature Range
  • Voltage-Mode PWM Control with Dual-Edge Modulation
  • 14V High Speed N-Channel MOSFET Gate Drivers
  • 2.0A Source/3A Sink at 14V Bottom-Side Gate Drive
  • 1.25A Source/2A Sink at 14V Top-Side Gate Drive
  • Fast Transient Response
  • 15MHz (typ) Gain-Bandwidth Error Amplifier with 6V/µs slew rate
  • Full 0% to 100% Duty Cycle Support
  • Programmable Operating Frequency from 50kHz to 1.5MHz
  • Lossless Programmable Overcurrent Protection
  • Top-Side MOSFET's rDS(ON) Sensing
  • ~120ns Blanking Time
  • Sourcing and Sinking Current Capability
  • Support for Start-Up into Prebiased Loads
  • Soft-Start Done and an External Reference Pin for Tracking Applications are Available in the QFN Package
  • Pb-free available (RoHS compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8104
Basic Information
Production Status
Mass Production
iSim Model
YES
Input Voltage Min (V)
1.2
Input Voltage Max (V)
12
Output Voltage Min (V)
0.6
Output Voltage Max (V)
5
Output Current Max (A)
30
VBIAS (min)
7.6 V
VBIAS (max) (V)
15.4
IS (typ)
51 mA
Qualification Level
Standard
Bias Voltage Range (V)
7.6 to 15.4
Can Sample
YES
Temperature Range
-40 to +85

Confirm below disclaimers

Input Renesas account name and password