ISL95836 Laptop PWM Controller Datasheet
The ISL95836 Pulse Width Modulation (PWM) controller IC
provides a complete solution for IMVP-7/VR12 compliant
microprocessor and graphic processor core power supplies. It
provides the control and protection for two Voltage Regulators
(VRs). The first VR, typical for Vcore, incorporates 2 integrated
drivers and can operate in 3-, 2- or 1-phase configurations. The
second VR, typical for graphics, incorporates 1 integrated
driver and can operate in 2- or 1-phase configurations. The two
VRs share a serial control bus to communicate with the CPU and
achieve lower cost and smaller board area compared with the
two-chip approach.
Both VRs utilize Intersil's Robust Ripple Regulator R3
Technology. The R3 modulator has numerous advantages
compared to traditional modulators, including faster transient
response, variable switching frequency during load transients,
and improved light load efficiency due to its ability to
automatically change switching frequency.
The ISL95836 has several other key features. Both outputs
support either DCR current sensing with a single NTC
thermistor for DCR temperature compensation, or more
precise resistor current sensing if desired. Both outputs come
with remote voltage sense, programmable VBOOT voltage,
IMAX, and switching frequency, adjustable overcurrent
protection and separate Power-Good signals.
Features
• Serial Data Bus
• Dual Outputs:
- Configurable 3-, 2- or 1-phase for the 1st Output Using Two Integrated Gate Drivers
- Configurable 2- or 1-phase for the 2nd Output Using One Integrated Gate Driver
• R3 Modulator
- Excellent Transient Response
- High Light Load Efficiency
• 0.5% System Accuracy Over-Temperature
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Differential Remote Voltage Sensing
• Programmable VBOOT Voltage at Start-up
• Resistor Programmable IMAX, Switching Frequency for Both Outputs
• Adaptive Body Diode Conduction Time Reduction
Applications
• IMVP-7/VR12 Compliant Computers
The ISL95836 Pulse Width Modulation (PWM) controller IC
provides a complete solution for IMVP-7/VR12 compliant
microprocessor and graphic processor core power supplies. It
provides the control and protection for two Voltage Regulators
(VRs). The first VR, typical for Vcore, incorporates 2 integrated
drivers and can operate in 3-, 2- or 1-phase configurations. The
second VR, typical for graphics, incorporates 1 integrated
driver and can operate in 2- or 1-phase configurations. The two
VRs share a serial control bus to communicate with the CPU and
achieve lower cost and smaller board area compared with the
two-chip approach.
Both VRs utilize Intersil's Robust Ripple Regulator R3
Technology. The R3 modulator has numerous advantages
compared to traditional modulators, including faster transient
response, variable switching frequency during load transients,
and improved light load efficiency due to its ability to
automatically change switching frequency.
The ISL95836 has several other key features. Both outputs
support either DCR current sensing with a single NTC
thermistor for DCR temperature compensation, or more
precise resistor current sensing if desired. Both outputs come
with remote voltage sense, programmable VBOOT voltage,
IMAX, and switching frequency, adjustable overcurrent
protection and separate Power-Good signals.
Features
• Serial Data Bus
• Dual Outputs:
- Configurable 3-, 2- or 1-phase for the 1st Output Using Two Integrated Gate Drivers
- Configurable 2- or 1-phase for the 2nd Output Using One Integrated Gate Driver
• R3 Modulator
- Excellent Transient Response
- High Light Load Efficiency
• 0.5% System Accuracy Over-Temperature
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Differential Remote Voltage Sensing
• Programmable VBOOT Voltage at Start-up
• Resistor Programmable IMAX, Switching Frequency for Both Outputs
• Adaptive Body Diode Conduction Time Reduction
Applications
• IMVP-7/VR12 Compliant Computers
