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
Features
The EN5322 is a high efficiency synchronous
buck converter with integrated inductor, PWM
controller, MOSFETS, and compensation
providing the smallest possible solution size.
• Revolutionary Integrated Inductor
• Total Solution Footprint as Small as 50 mm2
• 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 mVP-P Typical
• 2% Initial VOUT 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
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.
• RoHS Compliant; MSL 3 260 °C Reflow
Applications
• Point of Load Regulation for Low Power
Processors, Network Processors, DSPs’
FPGAs and ASICs
Application Circuit
• Replacement of LDOs
ENABLE
VOUT
VSENSE
VIN
PVIN
VOUT
• Noise Sensitive Applications such as A/V and
CIN
VS0
VS1
RF
EN5322POK
COUT
47 uF
10 uF
VS2
• Computing, Computer Peripherals, Storage,
Networking, and Instrumentation
• DSL, STB, DVR, DTV, and iPC
PGND
PGND
AVIN
AGND
1 uF
Ordering Information
Part Number
EN5322QI-T
EN5322QI-E
Temp Rating (°C)
Package
24-pin QFN T&R
Figure 1. Typical Application Circuit
-40 to +85
QFN Evaluation Board
©Enpirion 2008 all rights reserved, E&OE
1
www.enpirion.com
03454
4/24/2009
Rev:A
ENPIRION [ ENPIRION, INC. ]
