EP5352QI Datasheet, PDF (10/18 Pages) Altera Corporation – 500/600/800mA PowerSoC Synchronous Buck Regulators With Integrated Inductor

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
EP5382QI/EP5362QI/EP5352Q I
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.
Cin
Manufacturer Part #
Value WVDC Case Size
Murata
GRM219R61A475KE19D 4.7uF
10V
GRM319R61A475KA01D
GRM219R60J475KE01D
6.3V
GRM31MR60J475KA01L
0805
1206
0805
1206
Panasonic
ECJ-2FB1A475K
ECJ-3YB1A475K
ECJ-2FB0J475K
ECJ-3YB0J475K
10V
0805
1206
6.3V
0805
1206
Taiyo Yuden LMK212BJ475KG-T
LMK316BJ475KD-T
JMK212BJ475KD-T
Cin
Manufacturer
Part #
Murata
GRM21BR71A225KA01L
GRM31MR71A225KA01L
GRM21BR70J225KA01L
Value
2.2uF
10V
0805
1206
6.3V
0805
WVDC
10V
6.3V
Case Size
0805
1206
0805
Panasonic
ECJ-2FB1A225K
ECJ-3YB1A225K
ECJ-2YB0J225K
10V
0805
1206
6.3V
0805
Taiyo Yuden LMK107BJ225KA-T
LMK212BJ225KG-T
Cout
Manufacturer
Part #
Murata GRM219R60J106KE19D
GRM319R60J106KE01D
Value
10uF
10V
0603
0805
WVDC Case Size
6.3V
0805
1206
Panasonic
ECJ-2FB0J106K
ECJ-3YB0J106K
6.3V
0805
1206
Taiyo Yuden
JMK212BJ106KD-T
JMK316BJ106KF-T
6.3V
0805
1206
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.
03132
10
October 11, 2013
www.altera.com/enpirion
Rev H