EP5358LUI datasheet(9/16 Pages) ALTERA

9 / 16 page

EP5358LUI/EP5358HUI

Detailed Description

Functional Overview

The EP5358xUI requires only 2 small MLCC

capacitors for a complete DC-DC converter

solution.

The device integrates MOSFET

switches,

PWM

controller,

Gate-drive,

compensation, and inductor into a tiny 2.5mm x

2.25mm

1.1mm

micro-QFN

package.

Advanced package design, along with the high

level of integration, provides very low output

ripple and noise. The EP5358xUI uses voltage

mode control for high noise immunity and load

matching to advanced ≤90nm loads. A 3-pin

VID allows the user to choose from one of 8

output

voltage

settings.

The

EP5358xUI

comes with two VID output voltage ranges.

The EP5358HUI provides VOUT settings from

1.8V to 3.3V, the EP5358LUI provides VID

settings from 0.8V to 1.5V, and also has an

external resistor

divider option to program

output setting over

the 0.6V to VIN-0.25V

range. The EP5358xUI provides the industry’s

highest power density of any 600mA DCDC

converter solution.

The

key

enabler

this

revolutionary

integration

Altera’s

proprietary

power

MOSFET technology. The advanced MOSFET

switches are implemented in deep-submicron

CMOS to supply very low switching loss at high

switching frequencies and to allow a high level

integration. The semiconductor

process

allows seem-less integration of all switching,

control, and compensation circuitry.

The proprietary magnetics

design provides

high-density/high-value magnetics in a very

small footprint.

Altera Enpirion magnetics are

carefully

matched

the

control

and

compensation

circuitry

yielding

optimal

solution with assured performance over the

entire operating range.

Protection features include under-voltage lock-

out (UVLO), over-current protection (OCP),

short circuit protection, and thermal overload

protection.

Integrated Inductor: Low-Noise Low-EMI

The EP5358xUI utilizes a proprietary low loss

integrated inductor.

The integration of the

inductor greatly simplifies the power supply

design process. The inherent shielding and

compact construction of the integrated inductor

reduces the conducted and radiated noise that

can couple into the traces of the printed circuit

board.

Further,

the

package

layout

optimized to reduce the electrical path length

for the high di/dT input AC ripple currents that

are a major source of radiated emissions from

DC-DC converters.

The integrated inductor

provides the optimal solution to the complexity,

output ripple, and noise that plague low power

DCDC converter design.

Control Matched to sub 90nm Loads

The EP5358xUI utilizes an integrated type III

compensation network.

Voltage mode control

is inherently impedance matched to the sub

90nm process technology that is used in

today’s advanced ICs.

Voltage mode control

also provides a high degree of noise immunity

at light load currents so that low ripple and high

accuracy are maintained over the entire load

range.

The very high switching frequency

allows for a very wide control loop bandwidth

and hence excellent transient performance.

Soft Start

Internal soft start circuits limit in-rush current

when the device starts up from a power down

condition

when

the

“ENABLE”

asserted “high”.

Digital control circuitry limits

the VOUT ramp rate to levels that are safe for

the

Power

MOSFETS

and

the integrated

inductor.

The EP5358HUI has a soft-start slew rate that

is twice that of the EP5358LUI.

When the EP5358LUI is configured in external

resistor divider mode, the device has a fixed

VOUT ramp time. Therefore, the ramp rate will

vary with the output voltage setting.

Output

voltage ramp time is given in the Electrical

Characteristics Table.

www.altera.com/enpirion Page 9

03541

October 11, 2013

Rev F

EP5358LUI 데이터시트(PDF) 9 Page - Altera Corporation

EP5358LUI 데이터시트(HTML) 9 Page - Altera Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

데이터시트 다운로드

링크 URL