Intersil – ISL8115 High Voltage Synchronous Buck PWM Controller with Integrated Gate Driver and Current Sharing Capability
Utilizing voltage-mode control with input voltage feed-forward compensation, the ISL8115 maintains a constant loop gain for optimal transient response, especially for applications with a wide input voltage range.
The ISL8115 protects against overcurrent conditions by inhibiting the PWM operation while monitoring the current with DCR of the output inductor, or a precision resistor. It also has a pre-POR overvoltage protection option, which provides some protection to the load if the upper MOSFET(s) is shorted.
The ISL8115 features remote ground sensing, programmable input voltage UVLO, output under/overvoltage protection, power-good indication, and fault Hand Shake capability.
Key Features:
- Wide VIN range operation: 2.97V to 36V; up to 5.5V output and 30A load current per phase
- Fast transient response
- Voltage-mode PWM leading-edge modulation with non-linear control
- Input voltage feed-forward
- Integrated 5V high speed 4A MOSFET gate drivers
- Internal bootstrap diode
- Excellent output voltage regulation
- 0.6V ±1.0% internal reference (-40°C ~ 125°C)
- 0.6V ±0.7% internal reference (-40°C ~ 105°C)
- Differential voltage sensing
- Excellent current balancing and overcurrent protection
- Peak and average overcurrent protection
- Output current monitor on the ISET pin o Oscillator programmable from 150kHz to 1.5MHz
- Frequency synchronization to external clock signal
- Diode emulation mode for light load efficiency improvement
- Power-good open drain output o Pre-bias start-up function
- Output OVP, UVP; OTP
- Adjustable Soft-Start Applications
- Power supply for datacom/telecom and POL
- Wide input voltage range buck regulators
- High current density power supplies RF power amplifier bias compensation
