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Eutech Microelectronics

EUP2621 Datasheet Preview

EUP2621 Datasheet

620kHz/1.25MHz Step-up DC/DC Converter

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EUP2621
620kHz/1.25MHz Step-up DC/DC Converter
DESCRIPTION
The EUP2621 is a high performance current mode, PWM
step-up converter with pin selectable operating frequency.
With an internal 1.6A, 200m MOSFET, it can generate
12V at up to 400mA output current from a 5V supply. The
selectable 620kHz and 1.25MHz allows smaller inductors
and faster transient response. An external compensation pin
gives the user greater flexibility in setting loop
compensation allowing the use of low ESR Ceramic output
capacitors. Soft-start is controlled with an external
capacitor, which determines the input current ramp rate
during start-up.
When shut down, it draws 10µA of current and can
operate down to 2.5V input supply. These features along
with 1.25MHz switching frequency makes it an ideal
device for portable equipment and TFT-LCD displays.
The EUP2621 is available in an 8-pin MSOP package. The
device is specified for operation over the full -40°C to
+85°C temperature range.
FEATURES
z 90% Efficiency
z 1.6A, 200mPower MOSFET
z 2.5V to 5.5V Input Range
z Adjustable Output Voltage up to 18V
z 620kHz/1.25MHz Switching Frequency Selection
z Adjustable Soft-Start
z Internal Thermal Protection
z Small MSOP-8 package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z TFT-LCD Displays
z DSL Modems
z Set-Top Boxes
z PCMCIA Cards
z Portable Equipment
z Handheld Devices
Typical Application Circuit
DS2621 Ver 1.0 July .2006
Figure 1. 5V to 12V Step-Up
1




Eutech Microelectronics

EUP2621 Datasheet Preview

EUP2621 Datasheet

620kHz/1.25MHz Step-up DC/DC Converter

No Preview Available !

EUP2621Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Pin Configurations
Part Number
Figure 2. Triple Output TFT LCD Power Supply
Pin Configurations
EUP2621
MSOP-8
Pin Description
PIN
COMP
PIN
1
FB 2
SHDN
GND
SW
VIN
FSEL
3
4
5
6
7
SS 8
DS2621 Ver 1.0 July .2006
DESCRIPTION
Compensation pin. Output of the internal error amplifier. Capacitor and resistor
from COMP pin to ground.
Voltage feedback pin. Internal reference is 1.24V NOMINAL. Connect a resistor
divider from VOUT. VOUT=1.24V (1+R1/R2).
Shutdown control pin. Pull SHDN low to turn off the device.
Analog and power ground.
Power switch pin. Switch connected to the drain of the internal power MOSFET.
Analog power input pin.
Frequency select pin. When FSEL is connected to GND, switching frequency is set
to 620kHz. When connected to VIN, switching frequency is set to 1.25MHz
Soft-start control pin. Connect a capacitor to control the converter start-up
2


Part Number EUP2621
Description 620kHz/1.25MHz Step-up DC/DC Converter
Maker Eutech Microelectronics
PDF Download

EUP2621 Datasheet PDF






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