Datasheet > ISL62871

ISL62871

更新时间： 2024-09-25 05:39:43

品牌	Logo	应用领域
英特矽尔 - INTERSIL		调节器控制器便携式
页数	文件大小	规格书
25页	766K
描述
PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator

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ISL62871 数据手册

ISL62871, ISL62872

Data Sheet

August 14, 2008

FN6707.0

PWM DC/DC Controller With VID Inputs

For Portable GPU Core-Voltage Regulator

Features

• Input Voltage Range: 3.3V to 25V

• Output Voltage Range: 0.5V to 3.3V

• Output Load up to 30A

The ISL62871 and ISL62872 IC’s are Single-Phase

Synchronous-Buck PWM voltage regulators featuring

Intersil’s Robust Ripple Regulator (R ) Technology™. The

wide 3.3V to 25V input voltage range is ideal for systems

that run on battery or AC-adapter power sources. The

ISL62871 and ISL62872 are low-cost solutions for

applications requiring dynamically selected slew-rate

controlled output voltages. The soft-start and dynamic

setpoint slew-rates are capacitor programmed. Voltage

identification logic-inputs select two (ISL62871) or four

(ISL62872) resistor-programmed setpoint reference voltages

that directly set the output voltage of the converter between

0.5V to 1.5V, and up to 3.3V using a feedback voltage

divider. Optionally, an external reference such as the DAC

output from a microcontroller, can be used by either IC to

program the setpoint reference voltage, and still maintain the

controlled slew-rate features. Robust integrated MOSFET

drivers and Schottky bootstrap diode reduce the

• Extremely Flexible Output Voltage Programmability

- 2-Bit VID (ISL62872) Selects Four Independent

Setpoint Voltages

- 1-Bit VID (ISL62871) Selects Two Independent Setpoint

Voltages

- Simple Resistor Programming of Setpoint Voltages

- Accepts External Setpoint Reference Such as DAC

• ±0.75% System Accuracy: -10°C to +100°C

• One Capacitor Programs Soft-start and Setpoint Slew-rate

• Fixed 300kHz PWM Frequency in Continuous Conduction

• External Compensation Affords Optimum Control Loop

Tuning

• Automatic Diode Emulation Mode for Highest Efficiency

implementation area and lower component cost.

• Integrated High-current MOSFET Drivers and Schottky

Boot-Strap Diode for Optimal Efficiency

Intersil’s R Technology™ combines the best features of

both fixed-frequency and hysteretic PWM control. The PWM

frequency is 300kHz during static operation, becoming

variable during changes in load, setpoint voltage, and input

voltage when changing between battery and AC-adapter

power. The modulators ability to change the PWM switching

frequency during these events in conjunction with external

loop compensation produces superior transient response.

For maximum efficiency, the converter automatically enters

diode-emulation mode (DEM) during light-load conditions

such as system standby.

• Choice of Overcurrent Detection Schemes

- Lossless Inductor DCR Current Sensing

- Precision Resistive Current Sensing

• Power-Good Monitor for Soft-Start and Fault Detection

• Fault Protection

- Undervoltage

- Overvoltage

- Overcurrent (DCR-Sense or Resistive-Sense

Capability)

- Over-Temperature Protection

- Fault Identification by PGOOD Pull-Down Resistance

• Pb-Free (RoHS compliant)

Applications

• Mobile PC Graphical Processing Unit VCC rail

• Mobile PC I/O Controller Hub (ICH) VCC rail

• Mobile PC Memory Controller Hub (GMCH) VCC rail

• Built-in voltage margin for system-level test

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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与ISL62871相关器件

型号	品牌	获取价格	描述	数据表
ISL62871HRUZ	INTERSIL	获取价格	PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator
ISL62871HRUZ-T	INTERSIL	获取价格	PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator
ISL62871HRUZ-T7	RENESAS	获取价格	SWITCHING CONTROLLER
ISL62872HRUZ	INTERSIL	获取价格	PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator
ISL62872HRUZ-T	INTERSIL	获取价格	PWM DC/DC Controller With VID Inputs For Portable GPU Core-Voltage Regulator
ISL62872HRUZ-T7	RENESAS	获取价格	SWITCHING CONTROLLER
ISL62873	INTERSIL	获取价格	PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
ISL62873HRUZ-T	INTERSIL	获取价格	PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
ISL62875	INTERSIL	获取价格	PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
ISL62875HRUZ-T	INTERSIL	获取价格	PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator

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