TLF51801ELV Datasheet, PDF (4/29 Pages) Infineon Technologies AG – 10 A synchronous DC/DC Step-Down Controller

TLF51801ELV
3
Pin Configuration
3.1
Pin Assignment
Pin Configuration
IVCC 1
VS 2
EN 3
GND 4
SYNC /FR EQ 5
COMP 6
FB 7
TLF51801ELV
Figure 2 Pin Configuration
3.2
Pin Definitions and Functions
14 sensehigh
13 senselow
12 BTS
11 UG
10 BUO
9 LG
8 PGND
Pin Symbol Function
1 IVCC Internal Voltage Supply
Output of the internal linear regulator, supply for low-side driver and through internal bootstrap
diode to high-side driver, connect a capacitor between this pin and GND
2 VS
Input Voltage
Connect to input voltage for internal power supply
3 EN
Enable Input
Active-high enable input with integrated pull down resistor
4 GND Ground
Connect to ground plane
5 SYNC/ Synchronization and Oscillator frequency set Input
FREQ Connect to an external clock signal in order to synchronize/adjust the switching frequency
(SYNC-mode). Connect an external resistor to set the frequency (FREQ-mode)
6 COMP Compensation Input
Frequency compensation for regulation loop stability
Connect to compensation network
7 FB
Feedback Input
Connect via voltage divider to output capacitor
8 PGND Power Ground
Connect to Ground plane
9 LG
Low-side MOSFET driver output
Driving output for the low-side external power MOSFET, connect to gate
10 BUO
Buck Switch Out
Connect this point between the switching transistors, floating ground for high-side driver
Data sheet
4
Rev. 1.0.1, 2013-04-15