EN5312QI 查看數據表（PDF） - Altera Corporation

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EN5312QI

1A PowerSoC Synchronous Buck Regulator With Integrated Inductor

Altera Corporation 

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 next to the output pins of

the device without requiring modification to the

compensation network. VOUT has to be sensed

at the last output filter capacitor next to the

device. 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.

Additional bulk capacitance for decoupling and

bypass can be placed at the load as long as

there is sufficient separation between the VOUT

Sense point and the bulk capacitance. The

separation provides an inductance that isolates

the control loop from the bulk capacitance.

Cin

Manufacturer

Part #

Value

Murata

GRM219R61A475KE19D

GRM319R61A475KA01D

GRM219R60J475KE01D

GRM31MR60J475KA01L

4.7uF

4.7uF

4.7uF

4.7uF

Panasonic

ECJ-2FB1A475K

ECJ-3YB1A475K

ECJ-2FB0J475K

ECJ-3YB0J475K

4.7uF

4.7uF

4.7uF

4.7uF

Taiyo Yuden

LMK212BJ475KG-T

LMK316BJ475KD-T

JMK212BJ475KD-T

1. For VIN ≤ 5.5V

4.7uF

4.7uF

4.7uF

WVDC Case Size

10V

0805

10V

1206

10V

0805

10V

1206

10V

10V 1

6.3V 1

6.3V

0805

1206

0805

1206

10V

10V 1

6.3V

0805

1206

0805

EN5312QI

Excess total capacitance on the output (Output

Filter + Bulk) can cause an over-current

condition at startup. Refer to the section on

Soft-Start for the maximum total capacitance

on the output.

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.

Power-Up Sequencing

During power-up, ENABLE should not be

asserted before VIN. Tying these pins together

meets these requirements.

Startup into Pre-Bias

The EN5312QI does not support startup into a

pre-biased output. The output of the EN5312QI

cannot be pre-biased with a voltage when it is

first enabled.

Cout

Manufacturer

Part #

Value

Murata

GRM219R60J106KE19D

GRM319R60J106KE01D

10uF

10uF

Panasonic

ECJ-2FB0J106K

ECJ-3YB0J106K

10uF

10uF

Taiyo Yuden

JMK212BJ106KD-T

JMK316BJ106KF-T

10uF

10uF

WVDC Case Size

6.3V

6.3V

0805

1206

6.3V

6.3V

0805

1206

6.3V

6.3V

0805

1206

04535

10

December 14, 2015

www.altera.com/enpirion

Rev E

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