TLF50281EL Infineon Technologies, TLF50281EL Datasheet - Page 6

• Manufacturer Part Number: TLF50281EL
• Manufacturer: Infineon Technologies

Specifications of TLF50281EL

• Packages: PG-SSOP-14
• Comment: Asyncronous low-Iq-Buck; 5V/500mA; Iq
• Vq (max): 5V
• Iq (max): 500.0 mA
• Iq (typ): 45.0 µA
• Output: Buck Converter

3
3.1
Figure 2
3.2
Pin
1
2
3
4
5
6
7
Data Sheet
Symbol Function
RO
WO
WI
SYNC
FREQ
RTADJ
FB
Pin Configuration
Pin Assignment
Pin Configuration
Pin Definitions and Functions
Reset Output
Provides the reset output signal. Open collector output, connect a pull up resistor to
another voltage source, if feature is used, if not, leave open. Might be connected in parallel with
pin WO, if necessary.
Watchdog Output
Provides the watchdog output signal. Open collector output, connect a pull up resistor to
another voltage source, if feature is used, if not, leave open. Might be connected in parallel with
pin RO, if necessary.
Watchdog Input
Connect Watchdog Input signal, if feature is used. If not used, connect to GND
Synchronization Input
Connect to an external clock signal in order to synchronize/adjust the switching frequency. This
feature is not functionally in PFM mode.
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.
Reset Threshold Adjust Pin
Connect an external resistor divider to adjust the Reset threshold. If function is not used, connect
to
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.
V
CC
.
RTADJ
SYNC
FREQ
WO
RO
FB
WI
1
2
3
4
5
6
7
TLF50281EL
PG-SSOP14
6
14
13
10
12
11
9
8
EN
SWO
GND
VS
GND
GND
WMSEL
Rev. 1.0, 2011-10-24
Pin Configuration
TLF50281EL
V
CC
V
or
CC
or