ISL8104
Synchronous Buck Pulse-Width Modulator (PWM) Controller
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)
Description
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.
Applications
- Test and Measurement Instruments
- Distributed DC/DC Power Architecture
- Industrial Applications
- Telecom/Datacom Applications
