Datasheet

LXDC2UR series
Micro DC-DC converter
3
Dec 2014
4-2. Pin Function
Pin Symbol I/O Description
1 Mode Input
This is the operation mode select pin. This pin must not be left
floating and must be terminated.
Mode=H: Low-noise mode enabled, fixed frequency PWM
operation is forced.
Mode=L: This device is operating in pulse frequency modulation
mode (PFM) at light load currents, and in regulated frequency
pulse width mode (PWM) at high-load currents.
2,6,9 GND -
Ground pin
3,4 Vout Output
Regulated voltage output pin.
Apply output load between this pin and GND.
5 EN Input
This is the ON/OFF control pin of the device.
Connecting this pin to GND keeps the device in shutdown mode.
Pulling this pin to Vin enables the device with soft start.
This pin must not be left floating and must be terminated.
EN=H: Device ON, EN=L: Device OFF
7,8 Vin Input
Vin pin supplies current to the LXDC2UR internal regulator.
4-3. Functional Block Diagram
Gate
Driver
EA
Switching
Controller
Soft Start
Clock
UVLO
Thermal
Shutdown
GND
Cout
Cin
Embedded L
EN
Mode
Vin
Vout
Control IC
LXDC2UR
Current
Sense
OCP