AP1513

Document number: DS31053 Rev. 5 - 2

7 of 9

www.diodes.com

December 2017

© Diodes Incorporated

AP1513

Functional Description (Cont.)

ESR

ΔI

V

L

RIPPLE





The bulk capacitor

’s ESR will determine the output ripple voltage and the initial voltage drop after a high slew-rate transient.

An aluminum electrolytic capacitor's ESR value is related to the capacitance and its voltage rating. In most case, higher voltage electrolytic

capacitors have lower ESR values. Most of the time, capacitors with much higher voltage ratings may be needed to provide the low ESR values

required for low output ripple voltage.

PCB Layout Guide

If you need low TC & TJ or large PD (Power Dissipation), the dual Output pins (5 & 6) and VSS pins (7 & 8) on the SO-8 package are internally

connected to die pad, The evaluation board should be allowed for maximum copper area at output pins.

1.

Connect FB circuits as closely as possible and keep away from inductor flux for pure VFB.

2.

Connect input capacitor to VCC and VSS pin as closely as possible to get good power filter effect.

3.

Connect ROCSET to VCC and OCSET pin as closely as possible.

4.

Connect ground side of the input capacitor & Schottky & output capacitor as closely as possible and use ground plane for best performance.

Ordering Information

AP1513 S X - 13

Package

Packing

13 : Tape & Reel

S : SO-8

Green

L : Lead Free

G : Green

Device

(Note 5)

Package Code

Package

(Note 6)

Green

Quantity

Part Number Suffix

Status

(Note 5)

Tube

13’’Tape and

reel

AP1513SG-13

S

SO-8

Green

2500

NA

-13

In production

Notes:

5. All Lead-Free variants are End of life without replacement.

6. For packaging details, go to our website at: https://www.diodes.com/design/support/packaging/diodes-packaging/diodes-package-outlines-and-pad-layouts/.

Marking Information (Note 5)

(1) SO-8

(Top View)

AP1513

YYWWX X

Logo

Part Number

5

8

4

1

WW : Week : 01~52; 52

YY : Year : 08, 09,10~

G : Green

X : Internal Code

represents 52 and 53 week

L : Lead Free