TLF50241EL_15 Datasheet, PDF (5/30 Pages) Marl International Limited – 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current

TLF50241EL
3
Pin Configuration
3.1
Pin Assignment
Pin Configuration
RO 1
N.C. 2
N.C. 3
TLF50241EL
14 N.C.
13 VS
12 N.C.
SYNC 4
FREQ
5
RTADJ
6
FB
7
Figure 2 Pin Configuration
11 SWO
10 GND
9 GND
PG-SSOP14
8 N.C.
3.2
Pin Definitions and Functions
Pin Symbol Function
1 RO
Reset Output
Provides the reset output signal. Open collector output, connect a pull up resistor to V_CC or
another voltage source, if feature is used, if not, leave open.
2 N.C.
Not Connected.
Internally not connected. Leave open or connect to GND.
3 N.C.
Not Connected.
Internally not connected. Leave open or connect to GND.
4 SYNC Synchronization Input
Connect to an external clock signal in order to synchronize/adjust the switching frequency. This
feature is not functionally in PFM mode.
5 FREQ Frequency Adjustment Pin
Connect an external resistor to GND to adjust the switching frequency, do not leave open. In
case the synchronization option is used, the resistor must be dimensioned close to the desired
synchronization frequency.
6 RTADJ Reset Threshold Adjust Pin
Connect an external resistor divider to adjust the Reset threshold. If function is not used, connect
to V_CC .
7 FB
Feedback Input
Connect this pin directly to the output capacitor. Also input for internal power supply. The internal
power supply is taken from the output voltage.
8 N.C.
Not Connected.
Internally not connected. Leave open or connect to GND.
9 GND Ground
Connect this pin directly with low inductive and broad trace to ground, do not leave open.
Data Sheet
5
Rev. 1.0, 2013-06-19