TLF50281EL Infineon Technologies, TLF50281EL Datasheet - Page 11

• 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

Input undervoltage shutdown: If the input voltage is below the input undervoltage shutdown threshold
device will shut down.
Output overvoltage protection: If the output voltage exceeds the PFM threshold the device will switch from PWM
to PFM. Pulses will then be generated only depending on the value of the output voltage
Soft start function: An integrated soft start function of duration
After an over-temperature shutdown the regulator always restarts with a soft start.
Over-temperature shutdown: An internal temperature sensor detects the temperature of the device. It will be
switched off if the junction temperature exceeds the over temperature shutdown threshold
certain hysteresis
Biasing:
The internal biasing is taken from pin VS as well as from pin FB (connected to
Chapter 7, Enable and Thermal
minimized.
Figure 3
Data Sheet
Block Diagram Buck Regulator
T
j,sd_hyst
Manager
Clock
(for details please refer to
VBG
Shutdown). Thus the power consumption from the supply voltage
SoftStart
Comparator
PFM
EA-gmV
-
-
Chapter 7, Enable and Thermal
Comp.
Slope
11
PWM Comp
CS-gmI
-
t
start
ensures, that the inrush current will be limited.
PWM
Logic
PFM
V
CC
) (for details please refer to
Driver
Shutdown).
V
CC
T
Rev. 1.0, 2011-10-24
j,sd
.
and restart with a
Buck Regulator
TLF50281EL
V
V
S
S,off
can be
the