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ISL62870 PDF预览

ISL62870

更新时间: 2024-11-13 05:39:43
品牌 Logo 应用领域
英特矽尔 - INTERSIL 稳压器控制器
页数 文件大小 规格书
16页 478K
描述
PWM DC/DC Voltage Regulator Controller

ISL62870 数据手册

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ISL62870  
¬
Data Sheet  
August 14, 2008  
FN6708.0  
PWM DC/DC Voltage Regulator Controller  
Features  
The ISL62870 IC is a Single-Phase Synchronous-Buck  
PWM voltage regulator featuring Intersil’s Robust Ripple  
Regulator (R ) Technology™. The ISL62870 provides a low  
• Input Voltage Range: 3.3V to 25V  
• Output Voltage Range: 0.5V to 3.3V  
• Output Load to 30A  
3
cost solution for compact high performance applications.The  
wide 3.3V to 25V input voltage range is ideal for systems  
that run on battery or AC adapter power sources. Resistor  
programmed output voltage setpoint and capacitor  
programmed soft-start delay allow for fast and easy  
implementation. Robust integrated MOSFET drivers and  
Schottky bootstrap diode reduce the implementation area and  
lower component cost.  
• Simple Resistor Programming for Output Voltage  
• ±0.75% System Accuracy: -10°C to +100°C  
• Capacitor Programming for Soft-Start Delay  
• Fixed 300kHz PWM Frequency in Continuous Conduction  
• External Compensation Affords Optimum Control Loop  
Tuning  
3
Intersil’s R Technology™ combines the best features of  
• Automatic Diode Emulation Mode for Highest Efficiency  
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.  
• Integrated High-Current MOSFET Drivers and Schottky  
Boot-Strap Diode for Optimal Efficiency  
• 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  
Pinout  
- Overcurrent (DCR-Sense or Resistive-Sense Capability)  
- Over-Temperature Protection  
- Fault Identification by PGOOD Pull-Down Resistance  
ISL62870  
(16 LD 2.6X1.8 µTQFN)  
TOP VIEW  
• 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  
GND  
EN  
BOOT  
1
2
3
4
12  
11  
10  
9
UGATE  
PHASE  
OCSET  
NC  
SREF  
Ordering Information  
PART NUMBER  
(Note)  
PART  
MARKING  
TEMP RANGE  
(°C)  
PACKAGE  
(Pb-Free)  
PKG.  
DWG. #  
ISL62870HRUZ  
GAL  
GAL  
-10 to +100  
-10 to +100  
16 Ld 2.6x1.8 µTQFN  
16 Ld 2.6x1.8 µTQFN  
L16.2.6x1.8A  
L16.2.6x1.8A  
ISL62870HRUZ-T*  
*Please refer to TB347 for details on reel specifications.  
NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and  
NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free  
products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright Intersil Americas Inc. 2008. All Rights Reserved  
All other trademarks mentioned are the property of their respective owners.  

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