TCV7108FN

2011-10-03

2

Ordering Information

Part Number

Shipping

TCV7108FN (TE85L, F) Embossed tape (3000 units per reel)

Block Diagram

Pin Description

Pin No.

Symbol

Description

1

PGND

Ground pin for the output section

2

Input pin for the output section

3

Input pin for the control section

4

SGND

Ground pin for the control section

5

Feedback pin

This input is fed into an internal error amplifier with a reference voltage of 0.8 V (typ.).

6

SS

Soft-start pin

When the SS input is left open, the soft-start time is 1 ms (typ.). The soft-start time can be adjusted

with an external capacitor. The external capacitor is charged from a 8

A (typ.) constant-current

source, and the reference voltage of the error amplifier is regulated between 0 V and 0.8 V. The

shutdown.

7

EN

Enable pin

When EN

switching operation of the output section. When EN

disabled, putting the TCV7108FN in Standby mode.

This pin has an internal pull-down resistor of approx. 500 k

.

8

Switch pin

This pin is connected to high-side P-channel MOSFET and low-side N-channel MOSFET.

EN

Driver

Control logic

Current detection

PGND

+

-

Constant-current

source (8

A)

SGND

+

-

Phase compensation

SS

Slope

Compensation

Soft Start

Error amplifier

Under

voltage

lockout

Ref. Voltage (0.8V)

-

Oscillator

Short-Circuit

Protection