LM2576 datasheet(3/46 Pages) TI

3 / 46 page

5 Pin Configuration and Functions

Figure 5-1. KC Package 5-Pin TO-220 Top View

Figure 5-2. KTT Package 5-PIN DDPAK/TO-263 Top

View

Figure 5-3. DDPAK/TO-263 (S) Package 5-Lead

Surface-Mount Package Top View

Table 5-1. Pin Functions

I/O(1)

DESCRIPTION

NO.

NAME

VIN

Supply input pin to collector pin of high-side transistor. Connect to power supply and input

bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as

short as possible.

OUTPUT

Emitter pin of the power transistor. This is a switching node. Attached this pin to an inductor

and the cathode of the external diode.

GROUND

—

Ground pin. Path to CIN must be as short as possible.

FEEDBACK

Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT for ADJ

version or connect this pin directly to the output capacitor for a fixed output version.

ON/OFF

Enable input to the voltage regulator. High = OFF and low = ON. Connect to GND to enable

the voltage regulator. Do not leave this pin float.

—

TAB

—

Connected to GND. Attached to heatsink for thermal relief for TO-220 package or put a

copper plane connected to this pin as a thermal relief for DDPAK package.

(1)

I = INPUT, O = OUTPUT

www.ti.com

LM2576, LM2576HV

SNVS107G – JUNE 1999 – REVISED MARCH 2023

Submit Document Feedback

Product Folder Links: LM2576 LM2576HV

LM2576 Datasheet(PDF) 3 Page - Texas Instruments