EP5382QI/EP5362QI/EP5352QI

during power-up or power-down meets this

requirement

.

Pre-Bias Start-up

The EP53x2QI does not support startup into a

pre-biased

condition.

Be

sure

the

output

capacitors are not charged or the output of the

EP53x2QI

is

not

pre-biased

when

the

EP53x2QI is first enabled.

Input and Output Capacitors

The input

capacitance requirement is

as

follows:

EP5352QI, EP5362QI = 2.2uF

EP5382QI = 4.7uF

Altera recommends that a low ESR MLCC

capacitor be used.

The input capacitor must

use a X5R or X7R or equivalent dielectric

formulation.

Y5V

or

equivalent

dielectric

formulations lose capacitance with frequency,

bias,

and

with temperature, and are not

suitable for

switch-mode DC-DC converter

input and output filter applications.

The output

capacitance requirement is a

minimum

of 10uF.

The control loop is

designed to be stable with up to 60uF of total

output

capacitance

without

requiring

modification of the control loop.

Capacitance

above the 10uF minimum should be added if

the transient performance is not sufficient using

the 10uF.

Altera recommends a low ESR

MLCC type capacitor be used. The output

capacitor must use a X5R or X7R or equivalent

dielectric

formulation.

Y5V

or

equivalent

dielectric formulations lose capacitance with

frequency, bias, and temperature and are not

suitable for

switch-mode DC-DC converter

input and output filter applications.

LAYOUT CONSIDERATIONS*

*Optimized PCB Layout file downloadable from http://www.altera.com/enpirion to assure first pass design success.

Recommendation 1: Input and output filter capacitors should be placed as close to the EP53x2QI

package as possible to reduce EMI from input and output loop AC currents.

This reduces the

physical area of the Input and Output AC current loops.

Recommendation 2: DO NOT connect GND pins 3 and 4 together. Pin 3 should be used for the

Input capacitor local ground and pin 4 should be used for the output capacitor ground. The ground

pad for the input and output filter capacitors should be isolated ground islands and should be

connected to system ground as indicated in recommendation 3 and recommendation 5.

Cin

Manufacturer Part #

Value

WVDC

Case Size

Murata

GRM219R61A475KE19D

4.7uF

10V

0805

GRM319R61A475KA01D

1206

GRM219R60J475KE01D

6.3V

0805

GRM31MR60J475KA01L

1206

Panasonic

ECJ-2FB1A475K

10V

0805

ECJ-3YB1A475K

1206

ECJ-2FB0J475K

6.3V

0805

ECJ-3YB0J475K

1206

Taiyo Yuden

LMK212BJ475KG-T

10V

0805

LMK316BJ475KD-T

1206

JMK212BJ475KD-T

6.3V

0805

Cin

Manufacturer

Part #

Value

WVDC

Case Size

Murata

GRM21BR71A225KA01L

2.2uF

10V

0805

GRM31MR71A225KA01L

1206

GRM21BR70J225KA01L

6.3V

0805

Panasonic

ECJ-2FB1A225K

10V

0805

ECJ-3YB1A225K

1206

ECJ-2YB0J225K

6.3V

0805

Taiyo Yuden

LMK107BJ225KA-T

10V

0603

LMK212BJ225KG-T

0805

Cout

Manufacturer

Part #

Value

WVDC

Case Size

Murata

GRM219R60J106KE19D

10uF

6.3V

0805

GRM319R60J106KE01D

1206

Panasonic

ECJ-2FB0J106K

6.3V

0805

ECJ-3YB0J106K

1206

Taiyo Yuden

JMK212BJ106KD-T

6.3V

0805

JMK316BJ106KF-T

1206

10

www.altera.com/enpirion

03132

October 11, 2013

Rev H