RT2516

2

DS2516-01

July 2012

www.richtek.com

©

Copyright

2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Functional Pin Description

Function Block Diagram

Pin No.

Pin Name

Pin Function

1, 4, 5

NC

No Internal Connection.

2

EN

Chip Enable (Active-High). Pulling this pin below 0.4V turns the regulator off,

reducing the quiescent current to a fraction of its operating value. The device will

be enabled if this pin is left open. Connect to VIN if not being used.

3

VIN

Input voltage. For regulation at full load, the input to this pin must be between

should be placed closely to this pin to ensure that the input supply does not sag

below 1.4V. Also a minimum of 10

μF ceramic capacitor should be placed directly at

this pin.

6

VOUT

Output Voltage. A minimum of 10

μF capacitor should be placed directly at this pin.

7

ADJ

If connected to the VOUT pin, the output voltage will be set at 0.5V. If external

feedback resistors are used, the output voltage will be determined by the resistor

ratio.

8,

9 (Exposed pad)

GND

Ground. The exposed pad must be soldered to a large PCB and connected to GND

for maximum power dissipation.

Typical Application Circuit

Figure 1. Adjustable Voltage Regulator

+

-

Reference

Generator

0.5V

Thermal

Shutdown

0.5µA

-

+

EN

VIN

GND

ADJ

VOUT

+

-

Reverse Voltage

Shutdown

EN

ADJ

VOUT

RT2516

GND

VIN

10µF

10µF

C2

R1

R2

OUT

0.5(R1+R2)

V

=

(V)

R2

6

7

C1

3

Chip Enable

2

8,

9 (Exposed Pad)