R1513S12D-E2-FE datasheet(7/23 Pages) RICOH

Part #	R1513S12D-E2-FE

Description	Input Voltage (Maximum Ratings) 3.5 V to 36 V (50 V)

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Manufacturer	RICOH [RICOH electronics devices division]

Direct Link	http://www.ricoh.com

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7 / 23 page

R1513S

NO.JA-321-160715

7

TYPICAL APPLICATION

R1513Sxx1B/D

VDD

VFB

VOUT

CE

C1

C2

GND

R1513S Typical Application

External Components List

Symbol

Description

C1

1.0 µF, Ceramic Capacitor

C2

4.7µF, Ceramic Capacitor

TECHNICAL NOTES

Phase Compensation

Phase compensation is provided to secure stable operation even when the load current is varied. For this purpose,

use a 4.7 µF or more output capacitor (C2) with good frequency characteristics and proper ESR (Equivalent Series

Resistance). Connect a 1.0 µF or more input capacitor (C1) between the VDD pin and the GND pin as close as

possible to the pins.

In case of using a tantalum type capacitor with a large ESR, the output might become unstable. Evaluate your

circuit including consideration of frequency characteristics.

Depending on the capacitor size, manufacturer, and part number, the bias characteristics and the temperature

characteristics vary.

PCB Layout

Ensure the VDD and GND lines are sufficiently robust. If their impedance is too high, noise pickup or unstable

operation may result. No. 2 pin and No.5 pin must be wired together when mounting on board. Connect a

capacitor with a suitable between the VDD and GND pins, and as close as possible to the pins. The load

regulation can be improved by short-circuiting VOUT and VFB close to the load device.

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R1513S12D-E2-FE Datasheet(PDF) 7 Page - RICOH electronics devices division

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