全称：Intel Mobile Voltage Positioning
1+2+1 Voltage Regulator for Intel IMVP8™ CPUs
Supports Intel serial data bus interface
System input power monitor (PSYS) supported
Three output controller
VR A supports 1-phase VR design
VR B configurable for 2-, 1-phase VR design
VR C supports 1-phase VR design
0.5% system accuracy over temperature
Low supply current in PS4 state
Supports multiple current sensing methods
Lossless inductor DCR current sensing
Precision resistor current sensing
Differential remote voltage sensing
Programmable SVID address
Resistor programmable address selection, IMAX and switching frequency
Compliant with Intel IMVP8™, the ISL95857 provides a complete power solution for Intel microprocessors supporting core, graphics and system agent rails. The controller provides control and protection for three Voltage Regulator (VR) outputs. VR A and VR C outputs support 1-phase operation only, while VR B is configurable for 2- or 1-phase operation. The address options programmable for these three outputs allow for maximum flexibility in support of the IMVP8™ CPU. All three VRs share a common serial control bus to communicate with the CPU and achieve lower cost and smaller board area compared with a two-chip approach.
Based on Intersil’s Robust Ripple Regulator (R3™) technology, the R3™ modulator has many advantages compared to traditional modulators. These include faster transient settling time, variable switching frequency in response to load transients and improved light-load efficiency due to diode emulation mode with load-dependent low switching frequency.
The ISL95857 has several other key features. The controller provides PWM outputs, which support Intel DrMOS power stages (or similar) and discrete power stages using the Intersil ISL95808 high voltage synchronous rectified buck MOSFET driver. The controller complies with IMVP8™ PS4 power requirements and supports power stages and drivers which are compatible. The ISL95857 supports the system input power monitor (PSYS) option. The controller supports either DCR current sensing with a single NTC thermistor for DCR temperature compensation or more precision through resistor current sensing if desired. All three outputs feature remote voltage sense, programmable IMAX, adjustable switching frequency, OC protection and a single VR_READY power-good indicator.
IMVP8 compliant notebooks, desktops, ultrabooks and tablets
SMBus Interface Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Configurations Combo Battery Charger
Configurable as HPB charger or NVDC charger
Compliant with Intel PROCHOT# and PSYS requirements
Adapter current monitor and battery discharging current monitor
Uses NFET for all the switches
Supports removal of battery during battery learn mode
Actively controlled inrush current to prevent FET damage
SMBus programmable settings and high accuracy
Comprehensive protection features include
PROCHOT# indicator for system low voltage, adapter overcurrent, battery overcurrent or system overheating
Hardware-based adapter-current and battery-current limits
Supports sudden removal of battery in system Turbo mode
16 switching frequency options from 350kHz to 1MHz
Low quiescent current
Intersil Robust Ripple Regulator (R3™) modulation scheme provides excellent light load efficiency and fast dynamic response
32 Ld 4x4mm2 QFN package
Pb-free (RoHS compliant)
The ISL95520 is a highly versatile combo battery charger configurable for operating as either a Hybrid Power Boost (HPB) charger or a Narrow VDC (NVDC) charger, supporting 2-, 3- or 4-cell batteries. Both configurations allow the battery to work with the adapter together to supply the system load when it exceeds the adapter capability, referred to as system Turbo mode. HPB charger configuration reverse-boosts battery energy to system bus in order to help the adapter provide the system power in Turbo mode.
NVDC charger configuration quickly turns on BGATE to enable the battery to help adapter provide the system power in Turbo mode. The ISL95520 uses N-channel MOSFETs (NFETs) for all the switches to achieve the best performance and lowest BOM cost. The internal charge pump is capable of turning on all the NFETs fast or slow depending on the circumstance or the need. The ability to quickly turn on NFETs prevents system bus voltage drop when battery is suddenly removed in Turbo mode or in battery learn mode.
The ISL95520 provides many protection features including PROCHOT# indicator for system low voltage, adapter overcurrent, battery overcurrent or overheating, with an array of SMBus programmable parameters for maximum flexibility. It also features hardware based adapter current limit and battery-current limit in addition to SMBus programmable limits.
The ISL95520 provides high accuracy adapter current monitor, battery current monitor and system power monitor outputs. To provide maximum flexibility for working with high power and low power systems, it provides several configurable current-sense resistor value options to achieve the best trade-off of current sensing accuracy vs power loss.
The ISL95520 uses Intersil patented Robust Ripple Regulator (R3™) modulation scheme to provide excellent light load efficiency and fast dynamic response. It is available in a 32 Ld 4x4mm2 QFN package.
Devices with rechargeable 2-, 3- or 4-cell batteries
High Voltage Synchronous Rectified Buck MOSFET Driver
Dual MOSFET drivers for synchronous rectified bridge
Adaptive shoot-through protection
0.5Ω ON-resistance and 4A sink current capability
Supports high switching frequency up to 2MHz
Fast output rise and fall time
Low propagation delay
Three-state PWM input for power stage shutdown
Internal bootstrap Schottky diode
Low shutdown supply current (5V, 3μA)
Diode emulation for enhanced light-load efficiency and prebiased start-up applications
VCC POR (Power-On Reset) feature integrated
Low three-state shutdown hold-off time (typical 160ns)
Pb-free (RoHS compliant)
The ISL95808 is a high frequency, dual MOSFET driver with low shutdown current, optimized to drive two N-Channel power MOSFETs in a synchronous-rectified buck converter topology. It is especially suited for mobile computing applications that require high efficiency and excellent thermal performance. The driver, combined with an Intersil multiphase Buck PWM controller, forms a complete single-stage core-voltage regulator solution for advanced mobile microprocessors.
The ISL95808 features a 4A typical sinking current for the lower gate driver. This current is capable of holding the lower MOSFET gate off during the rising edge of the phase node. This prevents shoot-through power loss caused by the high dv/dt of phase voltages. The operating voltage matches the 30V breakdown voltage of the MOSFETs commonly used in mobile computer power supplies.
The ISL95808 also features a three-state PWM input. This PWM input, working together with Intersil’s multiphase PWM controllers, will prevent negative voltage output during CPU shutdown. This feature eliminates a protective Schottky diode usually seen in microprocessor power systems.
MOSFET gates can be efficiently switched up to 2MHz using the ISL95808. Each driver is capable of driving a 3000pF load with propagation delays of 8ns and transition times under 10ns. Bootstrapping is implemented with an internal Schottky diode. This reduces system cost and complexity, while allowing for the use of higher performance MOSFETs. Adaptive shoot--through protection is integrated to prevent both MOSFETs from conducting simultaneously.
A diode emulation feature is integrated in the ISL95808 to enhance converter efficiency at light load conditions. This feature also allows for monotonic start-up into prebiased outputs. When diode emulation is enabled, the driver will allow discontinuous conduction mode by detecting when the inductor current reaches zero and subsequently turning off the low-side MOSFET gate.
The ISL95808 also features very low shutdown supply current (5V, 3μA) to ensure the low power consumption.
Core voltage supplies for Intel® and AMD™ mobile microprocessors
High frequency low profile DC/DC converters
High current low output voltage DC/DC converters
High input voltage DC/DC converters