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ISL62875HRUZ-T

更新时间： 2024-11-13 05:39:43
品牌 Logo 应用领域
英特矽尔 - INTERSIL 调节器开关控制器便携式
页数 文件大小 规格书
22页 691K
描述
PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator

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ISL62875HRUZ-T 数据手册

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PWM DC/DC Controller with VID Inputs for  
Portable GPU Core-Voltage Regulator  
ISL62875  
Features  
• Input Voltage Range: 3.3V to 25V  
• Output Voltage Range: 0.5V to 3.3V  
• Output Load up to 30A  
The ISL62875 is a Single-Phase Synchronous-Buck  
PWM voltage regulator featuring Intersil’s Robust Ripple  
Regulator (R ) Technology™. The wide 3.3V to 25V  
3
input voltage range is ideal for systems that run on  
battery or AC-adapter power sources. The ISL62875 is a  
low-cost solution 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  
four 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. Robust integrated MOSFET drivers and  
Schottky bootstrap diode reduce the implementation  
area and component cost.  
• Extremely Flexible Output Voltage Programmability  
- 2-Bit VID Selects Four 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  
• Fixed 500kHz PWM Frequency in Continuous  
Conduction  
• Integrated High-current MOSFET Drivers and  
Schottky Boot-Strap Diode for Optimal Efficiency  
3
Intersil’s R Technology™ combines the best features of  
both fixed-frequency and hysteretic PWM control. The  
PWM frequency is 500kHz 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.  
Applications*(see page 21)  
• Mobile PC GPU Core Power  
• Mobile PC I/O Controller Hub (ICH) VCC Rail  
• Tablet PCs/Slates and Netbooks  
• Hand-Held Portable Instruments  
Related Literature*(see page 21)  
• TB389 “PCB Land Pattern Design and Surface Mount  
Guidelines for QFN Packages”  
Typical Application  
+5V  
V
IN  
3.3V TO 25V  
C
C
PVCC  
VCC  
1
20  
VCC  
CIN  
19  
18  
17  
16  
2
3
4
5
6
7
8
9
PGND  
QHS  
QLS  
GND  
EN  
BOOT  
V
OUT  
UGATE  
PHASE  
LO  
0.5V TO 3.3V  
VID1  
VID0  
SREF  
SET0  
SET1  
GPIO  
COUT  
C
BOOT  
14  
13  
12  
C
OCSET  
OCSET  
VO  
RO  
FB  
10 11  
V
R
COMP  
CC  
C
COMP  
R
R
R
SET1 SET2 SET3  
R
FB  
GPIO  
FN6905.1  
September 18, 2009  
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.  
Copyright Intersil Americas Inc. 2009. All Rights Reserved  
1
All other trademarks mentioned are the property of their respective owners.  
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