EUP6514
5V/12V Synchronous Buck
PWM Controller
DESCRIPTION
The EUP6514 is a high efficiency, fixed 300kHz
frequency, voltage mode, synchronous PWM controller.
The device drives two low cost N-channel MOSFETs
and is designed to work with 5V to 12V supply voltage,
providing excellent regulation for load transients.
The EUP6514 includes soft-start, frequency
compensation networks nd integrates all of the controls,
output adjustments, monitoring and protection
functions into a single package.
A power-on-reset (POR) circuit monitors the power
supply to prevent wrong logic controls. The built-in
soft-start with fixed soft-start internal prevents the
output voltage from overshoot as well as limiting the
input current. Adjustable over-current protection
monitors the voltage drop across the RDS(ON) of the
lower MOSFET, with no current sense resistor
required. The EUP6514 is available in 8-pins SOP
package.
Pulling and holding the voltage on OPS pin below
0.1V with an open drain device shuts down the
controller.
FEATURES
Operating with 5~12V Supply Voltage
300 kHz Fixed Frequency Oscillator
Built-In Feedback Compensation
-Voltage-mode PWM Control with 0 to 100%
Duty Ratio
Fast Transient Response
-High-Speed GM Amplifier
Drives All Low Cost N-Channel MOSFETs
-Adaptive Shoot-Through Protection
Adjustable Over-Current Protection
-Using RDS(ON) of the Low-side MOSFET
Built-In Soft-Start
Shutdown Control using an External
Available in SOP-8
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Motherboard
Graphics Card
High Current, up to 20A, DC-DC Converter
Telecomm Equipments
IA Equipments
Typical Application Circuit
Figure 1.
DS6514
Ver 1.1
Aug. 2008
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
