EN5322QI Datasheet, PDF (1/16 Pages) Altera Corporation – 2A PowerSoC Synchronous Buck DC-DC Converter with Integrated Inductor

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.
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
Features
• 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 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
Application Circuit
V_IN
C_IN
10 uF
1 uF
ENABLE
VSENSE
PVIN
VOUT
VS0
VS1
EN5322
POK
VS2
PGND
PGND
AVIN AGND
V_OUT
C_OUT
47 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
03454
1
4/24/2009
www.enpirion.com
Rev:A