ISL8104

Features:

• Operates from an +8V ±5% to +14V ±10% Input
• Excellent Output Voltage Regulation
- 0.597V Internal Reference
- ±1% Over the Commercial Temperature Range
- ±1.5% Over the Industrial Temperature Range
• Simple Single-Loop Control Design
- Voltage-Mode PWM Control
• Fast Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
- Leading and Falling Edge Modulation
• Small Converter Size
- Constant Frequency Operation
- Oscillator Programmable from 50kHz to Over 1.5MHz
• 14V High Speed MOSFET Gate Drivers
- 2.0A Source/3A Sink at 14V Low Side Gate Drive
- 1.25A Source/2A Sink at 14V High Side Gate Drive
- Drives Two N-Channel MOSFETs
• Overcurrent Fault Monitor
- High-Side MOSFET's r_DS(ON) Sensing
- Reduced ~120ns Blanking Time
• Converter can Source and Sink Current
• Soft-Start Done and an External Reference Pin for Tracking Applications are Available in the QFN Package
• Pin Compatible with ISL6522 and ISL6535
• Supports Start-Up into Prebiased Loads
• Pb-Free Plus Anneal Available (RoHS Compliant)




Application

• Test & Measurement Instruments
• Routers Switches
• Medical Instrumentation
• Industrial Applications
• Telecom/Datacom Applications




Pinout






Specifications

Supply Voltage, V_PVCC,V_VCC . . . . . . . . . . . . . .GND - 0.3V to +16V
Enable Voltage, V_EN . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to +16V
Soft-start Done Voltage, V_SSDONE . . . . . . . . . .GND - 0.3V to +16V
Boot Voltage, V_BOOT. . . . . . . . . . . . . . . . . . . . .GND - 0.3V to +36V
Phase Voltage, VPHASE . . . . . . . . . V_BOOT - 16V to V_BOOT + 0.3V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 5.0V




Description

The ISL8104 is a high performance synchronous controller for demanding DC/DC converter applications. It provides overcurrent fault protection and is designed to safely start-up into prebiased output loads.

The output voltage of the converter can be precisely regulated to as low as 0.597V, with a maximum tolerance of ±1% over the commercial temperature range, and ±1.5% over the industrial temperature range.

The ISL8104 provides simple, single feedback loop, voltagemode control with fast transient response. It includes a triangle-wave oscillator that is adjustable from below 50kHz to over 1.5MHz. Full (0% to 100%) PWM duty cycle support is provided.

The error amplifier features a 15MHz gain-bandwidth product and 6V/s slew rate which enables high converter bandwidth for fast transient performance.

The ISL8104's overcurrent protection monitors the current by using the r_DS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.