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ISL95874

更新时间： 2024-11-05 11:13:07
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
29页 849K
描述
PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator

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ISL95874 数据手册

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PWM DC/DC Controller with VID Inputs for Portable  
GPU Core-Voltage Regulator  
ISL95874, ISL95875, ISL95876  
Features  
The ISL95874, ISL95875, ISL95876 ICs are Single-Phase  
Synchronous-Buck PWM regulators featuring Intersil’s  
• Input Voltage Range: 3.3V to 25V  
• Output Voltage Range: 0.5V to 5V  
• Precision Regulation  
4
proprietary 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 ISL95875 and ISL95876 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 four (ISL95875, ISL95876)  
resistor-programmed setpoint reference voltages that directly set  
the output voltage of the converter between 0.5V and 1.5V, and  
up to 5V with a feedback voltage divider.  
4
- Proprietary R ™ Frequency Control Loop  
- ±0.5% System Accuracy Over -10°C to +100°C  
• Optimal Transient Response  
4
- Intersil’s R ™ Modulator Technology  
• Output Remote Sense  
• Extremely Flexible Output Voltage Programmability  
- 2-Bit VID Selects Four Independent Setpoint Voltages for  
ISL95875 and ISL95876  
3
4
Compared with R modulator, the R modulator has equivalent  
light-load efficiency, faster transient performance, accurately  
regulated frequency control and all internal compensation. These  
updates, together with integrated MOSFET drivers and Schottky  
bootstrap diode, allow for a high-performance regulator that is  
highly compact and needs few external components. The  
differential remote sensing for output voltage and selectable  
switching frequency are another two new functions. For  
maximum efficiency, the converter automatically enters  
diode-emulation mode (DEM) during light-load conditions such as  
system standby.  
- Simple Resistor Programming of Setpoint Voltages  
• Selectable 300kHz, 500kHz, 600kHz or 1MHz PWM Frequency  
in Continuous Conduction  
• Automatic Diode Emulation Mode for Highest Efficiency  
• Power-Good Monitor for Soft-Start and Fault Detection  
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  
R
VCC  
+5V  
C
VCC  
C
PVCC  
V
IN  
3.3V TO 25V  
CIN  
Q
HS  
1
12  
11  
10  
9
GND  
RTN  
BOOT  
R
FB1  
RTN1  
2
V
UGATE  
PHASE  
PGOOD  
L
OUT  
O
0.5V TO 3.3V  
3
4
EN  
GPIO  
Q
LS  
CO  
SREF  
C
SEN  
RTN1  
C
BOOT  
R
O
0
R
FB  
R
OFS  
FIGURE 1. ISL95874 APPLICATION SCHEMATIC WITH ONE OUTPUT VOLTAGE SETPOINT AND DCR CURRENT SENSE  
October 21, 2011  
FN7933.0  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
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ISL95874IRUZ-T RENESAS

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ISL95875 INTERSIL

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ISL95875 RENESAS

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ISL95875HRUZ-T RENESAS

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ISL95875IRUZ-T RENESAS

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 		PWM DC/DC Controllers with VID Inputs for Portable GPU Core-Voltage Regulator
ISL95876 RENESAS

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 		PWM DC/DC Controllers with VID Inputs for Portable GPU Core-Voltage Regulator
ISL95876 INTERSIL

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 		PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator
ISL95876HRZ RENESAS

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 		PWM DC/DC Controllers with VID Inputs for Portable GPU Core-Voltage Regulator
ISL95876HRZ-T RENESAS

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 		PWM DC/DC Controllers with VID Inputs for Portable GPU Core-Voltage Regulator

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