EUP7117 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – High Efficiency, Synchronous Step-Down Controller

EUP7117
High Efficiency, Synchronous
Step-Down Controller
DESCRIPTION
The EUP7117 is a high-efficiency, low power synchronous
buck controller for a core logic power supply in notebook
applications. Two external N-channel MOSFETs are
needed by the controller to generate an output voltage as
low as 0.75V and output current up to 15A from an input
supply (1.8V to 28V). EUP7117 features two operation
modes: the pulse-skipping mode for high efficiency at light
load and the forced PWM mode for low noise applications.
The EUP7117 automatically adjusts operating frequency to
achieve fast transient response during load transient.
EUP7117 has built in output monitoring, positive and
negative current limit, over-voltage protection,
under-voltage protection and thermal shutdown. EUP7117
requires a 5V(4.5V~5.5V) power supply to power internal
control circuitry and gate drivers.
The EUP7117 is available in the 14 pin TSSOP package
and specified from -40°C to +85°C.
Typical Application Circuit
FEATURES
z Input Voltage Range:1.8V~28V
z Output Voltage Range:0.75V~5.5V
z Adjustable Frequency 100kHz to 600kHz
z PWM Mode with 100ns Load Step Response
z Selectable Operating Modes: Pulse-Skipping Mode
and Forced PWM Mode
z <1% Initial Reference Accuracy
z Typically 4µA Shutdown Current
z Over-Current Sensing from Low Side R_{DS (On)}
with 4500ppm/°C Temperature Compensation
z Positive and Negative Over-Current Limit
z Built in Bootstrap Diode
z OVP/UVP and Thermal Shutdown
z Power Good Detection
z Soft-Start and Soft-Stop
z Available in TSSOP-14 Package
z RoHS Compliant and 100% Lead(Pb)-Free
APPLICATIONS
z Notebooks
z I/O Supplies
z System Power Supplies
DS7117 Ver1.0 Feb. 2009
Figure.1 Typical Application Circuit
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