EN5395QI-E datasheet, PDF - EEWORLD Datasheet

EN5395QI-E: Description9A synchronous buck pwm DC-DC converter with integrated inductor 3-pin vid output voltage select; File Size433KB，18 Pages; ManufacturerENPIRION; Websitehttp://www.enpirion.com/

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9A synchronous buck pwm DC-DC converter with integrated inductor 3-pin vid output voltage select

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EN5395QI

9A Synchronous Buck PWM DC-DC

Converter with Integrated Inductor

3-Pin VID Output Voltage Select

RoHS Compliant

Description

The EN5395QI is a Power System on a Chip

(PowerSoC) DC-DC converter. It is specifically

designed to meet the precise voltage and fast

transient requirements of present and future

high-performance, low-power processor, DSP,

FPGA, ASIC, memory boards, and system level

applications in a distributed power architecture.

Advanced circuit techniques, ultra high switching

frequency,

and

innovative,

high-density,

integrated circuit and proprietary inductor

technology deliver high-quality, ultra compact,

non-isolated DC-DC conversion. Operating this

converter requires as few as five external

components that include small value input and

output ceramic capacitors and a soft-start

capacitor.

The Enpirion solution significantly helps in

system design and productivity by offering greatly

simplified

board

design,

layout

and

manufacturing requirements. In addition, a

reduction in the number of vendors required for

the complete power solution helps to enable an

overall system cost savings.

Features

10mm

12mm

•

Applications

•

Area constrained applications

Noise sensitive applications

Low voltage, distributed power architectures

with 2.5V, 3.3V or 5V rails

Computing

Enterprise Storage

Broadband, networking, LAN/WAN, optical

DSL, STB, DVR, DTV, Industrial PC

Integrated Inductor Technology:

Integrated

Inductor, MOSFETS, Controller in a 10 x 12 x

1.85mm package

Low Part Count: only 5 MLC Capacitors.

Up to 30W continuous output power.

Low output impedance optimized for

≤

90 nm

Master/slave configuration for paralleling.

5MHz operating frequency.

High efficiency, up to 93%.

Wide input voltage range of 2.375V to 5.5V.

3-Pin VID output voltage select to choose one

of 7 pre-programmed output voltages.

Output Enable pin and Power OK signal.

Programmable soft-start time.

Adjustable over-current protection.

Thermal shutdown, short circuit, over-voltage

and under-voltage protection.

RoHS compliant, MSL level 3, 260C reflow.

Typical Application Circuit

2 x 47µF

PVIN

AVIN

VS0

VS1

VS2

VID Output

Voltage Select

POK

VSENSE

VOUT

OUT

2 x 47µF

Ordering Information

Part Number

EN5395QI

EN5395QI-E

Temp Rating (°C)

Package

-40 to +85

58-pin QFN T&R

QFN Evaluation Board

15nF

AGND

PGND

Figure 1. Simple Layout.

©Enpirion

02392

11/12/2009

www.enpirion.com

Rev:E

EN5395QI

Pin Descriptions

1-3

NAME

FUNCTION

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

NO CONNECT – These pins are internally connected to the common drain output of the

internal MOSFETs. NC(SW) pins are not to be electrically connected to any external signal,

ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline

may result in part malfunction or damage.

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

Regulated converter output. Connect these pins to the load and place output capacitor from

these pins the PGND pins 24-26.

NO CONNECT – These pins are internally connected to the common drain output of the

internal MOSFETs. NC(SW) pins are not to be electrically connected to any external signal,

ground, or voltage. However, they must be soldered to the PCB. Failure to follow this guideline

may result in part malfunction or damage.

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

Output power ground. Refer to layout guideline section.

Input power supply. Connect to input power supply. Decouple with input capacitor to PGND.

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

Optional Over Current Protection adjust pin. Place ROCP resistor between this pin and AGND

(pin 40) to adjust the over current trip point.

Analog voltage input for the controller circuits. Connect this pin to the input power supply.

Analog ground for the controller circuits.

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

Voltage select line 2 input. See Table 1.

Voltage select line 1 input. See Table 1.

Voltage select line 0 input. See Table 1.

Power OK is an open drain transistor for power system state indication. POK is a logic high

when VOUT is with -10% to +20% of VOUT nominal.

Remote voltage sense input. Connect this pin to the load voltage at the point to be regulated.

Soft-Start node. The soft-start capacitor is connected between this pin and AGND. The value

of this capacitor determines the startup timing.

Optional Error Amplifier input. Allows for customization of the control loop.

Optional Error Amplifier output. Allows for customization of the control loop.

Output of the buffer leading to the error amplifier. Used for external modifications of the

compensation network.

Input Enable. Applying a logic high, enables the output and initiates a soft-start. Applying a

logic low disables the output.

PWM input/output. Used for optional master/slave configuration. When M/S pin is asserted

“low”, PWM will output the gate-drive PWM waveform. When the M/S pin is asserted “high”,

the PWM pin is configured as an input for PWM signal from the “master” device. PWM pin

can drive up to 3 slave devices.

NO CONNECT – This pin should not be electrically connected to any external signal, voltage,

or ground. This pin may be connected internally. However, this pin must be soldered to the

PCB.

Optional Master/Slave select pin. Asserting pin “low” places device in Master Mode for current

sharing. PWM pin (53) will output PWM drive signal. Asserting pin “high” will place the device

4-5

NC(SW)

6-13

14-20

21-22

VOUT

NC(SW)

24-29

30-35

36-37

41-42

PGND

PVIN

ROCP

AVIN

AGND

VS2

VS1

VS0

POK

VSENSE

EAIN

EAOUT

COMP

ENABLE

PWM

M/S

©Enpirion

02392

11/12/2009

www.enpirion.com

Rev:E

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