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PDF TLF50281EL Data sheet ( Hoja de datos )
| Número de pieza | TLF50281EL | |
| Descripción | 2.2 MHz Step-Down Regulator | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TLF50281EL (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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TLF50281EL
2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current
Data Sheet
Rev. 1.01, 2013-04-30
Automotive Power
1 page  
2 Block Diagram
TLF50281EL
Over
Temperature
Shutdown
EN 14
Enable
VS
13
FREQ 5
SYNC 4
WI 3
WO 2
Figure 1 Block Diagram
Buck
Converter
11 SWO
Oscillator
Bandgap
Reference
Soft Start
Ramp
Generator
Watchdog
INT.
SUPPLY
7 FB
Reset
Generator
6 RTADJ
1 RO
8
WMSEL
9
GND
10
GND
12
N.C.
TLF50281EL
Block Diagram
Data Sheet
5 Rev. 1.01, 2013-04-30
5 Page 
TLF50281EL
Buck Regulator
Input undervoltage shutdown: If the input voltage is below the input undervoltage shutdown threshold VS,off the
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 VCC.
Soft start function: An integrated soft start function of duration tstart ensures, that the inrush current will be limited.
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 Tj,sd and restart with a
certain hysteresis Tj,sd_hyst (for details please refer to Chapter 7, Enable and Thermal Shutdown).
Biasing:
The internal biasing is taken from pin VS as well as from pin FB (connected to VCC) (for details please refer to
Chapter 7, Enable and Thermal Shutdown). Thus the power consumption from the supply voltage VS can be
minimized.
VS
FB
SYNC_IN
FREQ
VBG
PFM
Comparator
-
-
EA-gmV
CS-gmI
PWM Comp
PWM
PFM
Logic
GateD
Driver
Clock
Manager
CK_A SoftStart
Slope
Comp.
CLK
SWO
Figure 3 Block Diagram Buck Regulator
GND
Data Sheet
11 Rev. 1.01, 2013-04-30
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLF50281EL.PDF ] | |
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