EN5339QI 데이터 시트보기 (PDF) - Altera Corporation

부품명

상세내역

제조사

EN5339QI

3A PowerSoC Low Profile Synchronous Buck DC-DC Converter with Integrated Inductor

Altera Corporation 

Functional Block Diagram

POK

PVIN

EN5339QI

ENABLE

UVLO

Thermal Limit

Current Limit

Soft Start

(-)

PWM

Comp

(+)

Sawtooth

Generator

POK

Logic

P-Drive

N-Drive

Compensation

Network

NC

(SW)

VOUT

PGND

(-)

Error

Amp

(+)

VFB

DAC

BIAS

VREF

TST

AVIN AGND

Package Boundary

Figure 4: Functional Block Diagram

Functional Description

Overview

The EN5339QI is a highly integrated synchronous

buck converter with an internal inductor utilizing

advanced CMOS technology to provide high

switching frequency, while also maintaining high

efficiency. The EN5339QI is a high power density

device packaged in a tiny 4x6x1.1mm 24-pin QFN

package. Its high switching frequency allows for the

use of very small MLCC input and output filter

capacitors and results in a total solution size as

small as 55mm2.

The EN5339QI buck converter uses Type III

voltage mode control to provide pin-point output

voltage accuracy, high noise immunity, low output

impedance and excellent load transient response.

The EN5339QI features include Power OK, under

voltage lockout (UVLO), over current protection,

short circuit protection, and thermal overload

protection.

Stability and Compensation

The EN5339QI utilizes an internal compensation

network that is designed to provide stable operation

over a wide range of operating conditions. The

output compensation circuit may be customized to

improve transient performance or reduce output

voltage ripple with dynamic loads.

Soft-Start

The EN5339QI has an internal soft-start circuit that

controls the ramp of the output voltage. The control

circuitry limits the VOUT ramp rate to levels that are

safe for the Power MOSFETs and the integrated

inductor.

The EN5339QI has a constant startup up time

which is independent of the VOUT setting. The

output rising slew rate is proportional to the output

voltage. The startup time is approximately 1.4ms

from when the ENABLE is first pulled high until

VOUT reaches the regulated voltage level.

06903

June 26, 2015

www.altera.com/enpirion, Page 11

Rev E

Share Link: