EN5312Q Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – Fully Integrated Voltage Mode Synchronous Buck PWM DC-DC Converter Module

ENPIRION
Preliminary
EN5312Q
Fully Integrated Voltage Mode Synchronous
Buck PWM DC-DC Converter Module
Rev 0.87 January , 2006
RoHS Compliant
V_IN
UVLO
Thermal Limit
Current Limit
ENABLE
Soft Start
(-)
PWM
Comp
(+)
Sawtooth
Generator
P-Drive
N-Drive
V_OUT
V_SENSE
(-)
Error
Amp
(+)
VREF
DAC
Switch
V_FB
Voltage
Select
Package Boundry
VS0 VS1 VS2
Product Highlights
• Revolutionary integrated inductor
• Total footprint as small as 28mm²
• Only two low cost MLCC caps required.
• Very low solution profile at 1.1mm.
• 4mm x 5mm x1.1mm QFN package
• Wide 2.4V to 5.5V input range.
• 1000mA output current.
• Less than 1 µA standby current.
• High efficiency, up to 95%.
• Very low ripple voltage; < 10mV
• 3 Pin VID Voltage select scheme.
• External divider option.
• 5 MHz switching frequency
• 2% accuracy over line, load, & temp.
• Short circuit, UVLO, and thermal protection.
• Stable with up to 100uF output
capacitance.
Product Overview
The Ultra-Low-Profile EN5312Q is targeted to
applications where board area and profile are
critical. EN5312Q is a complete power
conversion solution requiring only two low cost
ceramic MLCC caps. Inductor, MOSFETS,
PWM, and compensation are integrated into a
tiny 4mm x 5mm x 1.1mm QFN package.
Engineered to minimize all sources of converter
noise, the EN5312Q eases design and layout
constraints. 5 MHz switching frequency and
internal type III compensation provides superior
transient response. With a 1.1 mm profile, the
entire layout can occupy as little as 28mm² of
board area.
A 3-pin VID output voltage select scheme
provides 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.
Typical Application Circuit
V_IN
4.7µF
Voltage
Select
ENABLE
V_in
V_Sense
V_out
PFM
V_S0
V_FB
V_S1
V_S2
GND
V_OUT
10µF
Figure 1. Typical application circuit.
Applications
• Area constrained applications
• Set top box/home gateway
• Smart phones and PDAs.
• VoIP and Video phones
• Personal Media Players.
• Advanced Mobile Processors, DSP, IO,
Memory, Video, Multimedia Engines.