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EN5322QI 参数 Datasheet PDF下载

EN5322QI图片预览
型号: EN5322QI
PDF下载: 下载PDF文件 查看货源
内容描述: 2电压模式同步降压PWM DC -DC转换器集成电感器 [2 A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor]
分类和应用: 转换器电感器开关LTE
文件页数/大小: 16 页 / 324 K
品牌: ENPIRION [ ENPIRION, INC. ]
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Created on 3/12/2008 2:55:00 PM
EN5322QI
2 A Voltage Mode Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
RoHS Compliant
Halogen Free
General Description
The EN5322 is a high efficiency synchronous
buck converter with integrated inductor, PWM
controller, MOSFETS, and compensation
providing the smallest possible solution size.
The 4 MHz operation allows for the use of tiny
MLCC capacitors. It also enables a very wide
control loop bandwidth providing excellent
transient performance and reduced output
impedance. The internal compensation is
designed for unconditional stability across all
operating conditions.
Three VID output voltage select pins provide
seven pre-programmed output voltages along
with an option for external resistor divider.
Output voltage can be programmed on-the-fly to
provide fast, dynamic voltage scaling with
smooth transitions between VID programmed
output voltages.
Features
Revolutionary Integrated Inductor
Total Solution Footprint as Small as 50 mm
2
4 mm x 6 mm x 1.1 mm QFN Package
4 MHz Fixed Switching Frequency
High Efficiency, up to 95 %
Low Ripple Voltage; 8 mV
P-P
Typical
2% Initial V
OUT
Accuracy with VID Codes
2% Initial 0.6 V Feedback Voltage Accuracy
2.4 V to 5.5 V Input Voltage Range
2 A Continuous Output Current Capability
Fast Transient Response
Low Dropout Operation: 100 % Duty Cycle
Power OK Signal with 5 mA Sink Capability
Dynamic Voltage Scaling with VID Codes
17
μA
Typical Shutdown Current
Under Voltage Lockout, Over Current, Short
Circuit, and Thermal Protection
RoHS Compliant; MSL 3 260 °C Reflow
Applications
Point of Load Regulation for Low Power
Processors, Network Processors, DSPs’
FPGAs and ASICs
Replacement of LDOs
Noise Sensitive Applications such as A/V and
RF
Computing, Computer Peripherals, Storage,
Networking, and Instrumentation
DSL, STB, DVR, DTV, and iPC
Application Circuit
V
IN
C
IN
10 uF
ENABLE
PVIN
VS0
VS1
VSENSE
VOUT
V
OUT
C
OUT
47 uF
EN5322
POK
PGND
AGND
VS2
PGND
AVIN
1 uF
Ordering Information
Part Number
EN5322QI-T
EN5322QI-E
Temp Rating (°C)
Package
-40 to +85
24-pin QFN T&R
QFN Evaluation Board
Figure 1. Typical Application Circuit
©Enpirion
2008 all rights reserved, E&OE
1
4/24/2009
www.enpirion.com
Rev:A
03454