SL2980 datasheet(8/23 Pages) SII

8 / 23 page

HIGH RIPPLE-REJECTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

S-L2980 Series

Rev.5.1_00

Seiko Instruments Inc.

Standard Circuit

VSS

VOUT

ON/OFF

VIN

CIN

INPUT

OUTPUT

GND

Single GND

*1. CIN is a capacitor used to stabilize input.

*2. A ceramic capacitor of 1.0

μF or more can be used for CL, provided that a ceramic capacitor of

2.2

μF or more can be used for the product whose output voltage is 1.7 V or less.

Figure 9

Caution The above connection diagram and constant will not guarantees successful operation.

Perform through evaluation using the actual application to set the constant.

Application Conditions

Input capacitor (CIN):

0.47

μF or more

Input series resistance (RIN):

Ω or less

Output capacitor (CL):

1.0

μF or more*1

Equivalent Series Resistance (ESR) for output capacitor: 10

Ω or less

*1. If the product whose output voltage is 1.7 V or less will be used, the capacitance should be 2.2

μF or

more.

Caution Generally a series regulator may cause oscillation, depending on the selection of external

parts. Confirm that no oscillation occurs in the application for which the above capacitors

are used.

SL2980 Datasheet(PDF) 8 Page - Seiko Instruments Inc