EL7531 Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Lista de partido

EL7531

Monolithic 1A Step-Down Regulator with Low Quiescent Current

Renesas Electronics 

DATASHEET

EL7531

Monolithic 1A Step-Down Regulator with Low Quiescent Current

FN7428

Rev 10.00

December 10, 2015

The EL7531 is a synchronous, integrated FET 1A step-down

regulator with internal compensation. It operates with an input

voltage range from 2.5V to 5.5V, which accommodates

supplies of 3.3V, 5V, or a Li-Ion battery source. The output can

be externally set from 0.8V to VIN with a resistive divider.

The EL7531 features automatic PFM/PWM mode control, or

PWM mode only. The PWM frequency is typically 1.4MHz

and can be synchronized up to 12MHz. The typical no load

quiescent current is only 120µA. Additional features include

a Power-Good output, <1µA shut-down current, short-circuit

protection, and over-temperature protection.

The EL7531 is available in the 10 Ld MSOP package,

making the entire converter occupy less than 0.15 in2 of

PCB area with components on one side only. The 10 Ld

MSOP package is specified for operation over the full -40°C

to +85°C temperature range.

Ordering Information

PART TAPE &

PART NUMBER MARKING REEL PACKAGE

PKG.

DWG. #

EL7531IYZ

(Note)

BHAAA

- 10 Ld MSOP M10.118A

(Pb-free)

EL7531IYZ-T7 BHAAA

(Note)

7” 10 Ld MSOP M10.118A

(Pb-free)

EL7531IYZ-T13 BHAAA

(Note)

13” 10 Ld MSOP M10.118A

(Pb-free)

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100% matte

tin plate termination finish, which are RoHS compliant and compatible

with both SnPb and Pb-free soldering operations. Intersil Pb-free

products are MSL classified at Pb-free peak reflow temperatures that

meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Pinout

EL7531 (10 LD MSOP)

TOP VIEW

1 SGND

FB 10

2 PGND

VO 9

3 LX

PG 8

4 VIN

EN 7

5 VDD SYNC 6

Features

• Less than 0.15 in2 (0.97 cm2) footprint for the complete 1A

converter

• Components on one side of PCB

• Max height 1.1mm MSOP10

• Power-Good (PG) output

• Internally-compensated voltage mode controller

• Up to 94% efficiency

• <1µA shut-down current

• 120µA quiescent current

• Overcurrent and over-temperature protection

• External synchronizable up to 12MHz

• Pb-Free plus anneal available (RoHS compliant)

Applications

• PDA and pocket PC computers

• Bar code readers

• Cellular phones

• Portable test equipment

• Li-Ion battery powered devices

• Small form factor (SFP) modules

Typical Application Diagram

VS

(2.5V to 5.5V)

L1

VO

R3 100

C2

C3

VIN

VDD

LX 1.8µH

C1

10µF

10µF

0.1µF

EL7531

R5 100k

R4 100k

R6

100k

PG

EN

SYNC

PGND

SGND

R1*

124k

FB

R2*

100k

C4

470pF

VO

(1.8V @ 1A)

* VO = 0.8V * (1 + R1 / R2)

FN7428 Rev 10.00

December 10, 2015

Page 1 of 12

Share Link: