EN2340QI Datasheet, PDF (1/20 Pages) Enpirion, Inc. – 204A Voltage Mode Synchronous Buck PWM

EN2340QI
4A Voltage Mode Synchronous Buck PWM
DC-DC Converter with Integrated Inductor
PowerSOC
Description
The EN2340QI is a Power System on a Chip
(PowerSoC) DC-DC converter. It integrates MOSFET
switches, small-signal control circuits, compensation
and an integrated inductor in an advanced 8x11x3mm
QFN module. It offers high efficiency, excellent line
and load regulation over temperature and up to the
full 4A load range. The EN2340QI operates over a
wide input voltage range and is specifically designed
to meet the precise voltage and fast transient
requirements of high-performance products. The
EN2340 features frequency synchronization to an
external clock, power OK output voltage monitor,
programmable soft-start along with thermal and over
current protection. The device’s advanced circuit
design, ultra high switching frequency and proprietary
integrated inductor technology delivers high-quality,
ultra compact, non-isolated DC-DC conversion.
The Enpirion solution significantly helps in system
design and productivity by offering greatly simplified
board design, layout and manufacturing
requirements. In addition, overall system level
reliability is improved given the small number of
components required with the Enpirion solution.
All Enpirion products are RoHS compliant and lead-
free manufacturing environment compatible.
Features
• Integrated Inductor, MOSFETs, Controller
• Wide Input Voltage Range: 4.5V – 14V
• Guaranteed 4A I_OUT at 85°C with No Airflow
• Frequency Synchronization (External Clock)
• 2% V_OUT Accuracy (Over Line/Load/Temperature)
• High Efficiency (Up to 95%)
• Output Enable Pin and Power OK signal
• Programmable Soft-Start Time
• Pin Compatible with the EN2360QI (6A)
• Under Voltage Lockout Protection (UVLO)
• Programmable Over Current Protection
• Thermal Shutdown and Short Circuit Protection
• RoHS Compliant, MSL Level 3, 260^oC Reflow
Applications
• Space Constrained Applications
• Distributed Power Architectures
• Output Voltage Ripple Sensitive Applications
• Beat Frequency Sensitive Applications
• Servers, Embedded Computing Systems,
LAN/SAN Adapter Cards, RAID Storage Systems,
Industrial Automation, Test and Measurement,
and Telecommunications
06878
Figure 1. Simplified Applications Circuit
(Footprint Optimized)
100
95
90
85
80
75
70
65
60
55
50
0
Efficiency vs. Output Current
CONDITIONS
V_IN = 8.0V
AVIN = 3.3V
Dual Supply
VOUT = 5.0V
Actual Solution Size
200mm²
0.5 1 1.5 2 2.5 3 3.5 4
OUTPUT CURRENT (A)
Figure 2. Highest Efficiency in Smallest Solution Size
April 16, 2012
www.enpirion.com
Rev: B