CAT6243

http://onsemi.com

2

Figure 1. Application Schematic

VIN

ENABLE

CAT6243

ADJ

BYP

VOUT

GND

VIN

1 mF

VOUT

(Optional)

2.2 mF

Figure 2. Simplified Block Diagram

ADJ

GND

EN

2.5 M

VIN

BYP

VOUT

Enable

Logic

Thermal

Shutdown

+

−

+

−

Table 1. PIN FUNCTION DESCRIPTION

Pin #

WDFN−6

Pin #

DPAK−5−4

Pin #

DPAK−5−5

Pin Name

Description

1

5

5

EN

The Enable Input. An active HIGH input, turning ON the LDO. This input

operation. A pull−down 2.5 MW resistor maintains the circuit in the OFF

state if the pin is left open.

2, PAD

3, TAB

3, TAB

GND

Power Supply Ground; Device Substrate. The center pad is internally con-

nected to Ground and as such can cause short circuits to signal traces run-

ning beneath the IC. This pad is intended for heat sinking the IC to the PCB

and is typically connected to the PCB ground plane.

3

NC

NC

BYP

Bypass input. Placing a capacitor of 100 pF to 470 pF between BYP and

the turn−on time.

4

2

2

Regulated Output Voltage. A protection block eliminates any current flow

5

1

1

ADJ

Output Voltage Adjust Input. This input ties to the common point of a resistor

divider which determines the regulator’s output voltage. See Applications

section for details on selecting resistor values.

6

4

4

lator’s internal circuitry.