EL7531 Monolithic 1A Step-Down Regulator with Low Quiescent Current

EL7531

Printer Friendly Version

Monolithic 1A Step-Down Regulator with Low Quiescent Current

Datasheets,
Related Docs
& Simulations

Ordering Information

iBuy direct from Intersil	iBuy direct - out of stock	Request samples
Check distributor inventory	Available in RoHS/Pb-Free

Part No.

Design-In
Status

Temp.

Package

MSL

Price
US $

EL7531EVAL1Z

Active

Eval Board

N/A

EL7531IY

Active

Ind

10 Ld MSOP

1.94

EL7531IY-T13

Active

Ind

10 Ld MSOP T+R

2.04

EL7531IYZ

Active

Ind

10 Ld MSOP

1.61

EL7531IYZ-T13

Active

Ind

10 Ld MSOP T+R

1.71

EL7531IYZ-T7

Active

Ind

10 Ld MSOP T+R

1.71

EL7531EVAL1

InActive

Eval Board

N/A

EL7531IL-EVAL

InActive

Eval Board

N/A

EL7531IY-EVAL

InActive

Eval Board

N/A

EL7531IY-T7

InActive

Ind

10 Ld MSOP T+R

N/A

The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.

MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020

SMD = Standard Microcircuit Drawing

Description

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 V_IN 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-pin MSOP package, making the entire converter occupy less than 0.15 in² of PCB area with components on one side only. The 10-pin MSOP package is specified for operation over the full -40°C to +85°C temperature range.

Key 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
<1ìA shut-down current
120ìA quiescent current
Overcurrent and over-temperature protection
External synchronizable up to 12MHz
Pb-Free plus anneal available (RoHS compliant)

Related Documentation

Datasheet(s):
Monolithic 1A Step-Down Regulator with Low Quiescent Current

Evaluation Board(s):
Using the EL7531 Evaluation Board

Technical Homepage:
Broadband

Parametric Data


V_IN (min) (V)		2.5

V_IN (max) (V)		5.5

V_OUT (min) (V)		.8

V_OUT (max) (V)		V_IN

I_OUT (max) (A)		1

Iq (µA)		120

Switching Frequency (MHz)		1.4

Peak Efficiency (%)		80-94

POR		Y

BOM Total Footprint		0.78" x 0.27"

Application Block Diagrams

Applications

PDA and pocket PC computers
Bar code readers
Cellular phones
Portable test equipment
Li-Ion battery powered devices
Small form factor (SFP) modules

Related Devices

Parametric Table

	EL7530		Monolithic 600mA Step-Down Regulator with Low Quiescent Current
	EL7532		Monolithic 2A Step-Down Regulator
	EL7534		Monolithic 600mA Step-Down Regulator
	EL7536		Monolithic 1A Step-Down Regulator
	EL7554		Monolithic 4A DC/DC Step-Down Regulator
	EL7566		Monolithic 6A DC/DC Step-Down Regulator
	ISL6273		1.2A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator
	ISL6410		Single Synchronous Buck Regulator with Integrated FET for WLAN Chipsets
	ISL6410A		Single Synchronous Buck Regulator with Integrated FET for WLAN Chipsets
	ISL6412		Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit
	ISL6416		Triple Output, Low-Noise LDO Regulator with Integrated Reset Circuit
	ISL6455		0.6A PWM Regulator and Dual 0.3A LDOs and Reset
	ISL6455A		0.6A PWM Regulator and Dual 0.3A LDOs and Reset
	ISL8009A		1.5A Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator
	ISL8010		Monolithic 600mA Step-Down Regulator with Low Quiescent Current
	ISL8011		1.2A Integrated FETs, High Efficiency Synchronous Buck Regulator
	ISL8012		2A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator
	ISL8013		3A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator
	ISL8014		4A Low Quiescent Current 1MHz High Efficiency Synchronous Buck Regulator
	ISL8500		2A Standard Buck PWM Regulator
	ISL85001		1A Standard Buck PWM Regulator
	ISL8502		2.5A Synchronous Buck Regulator with Integrated MOSFETs
	ISL8540		DC/DC Power Switching Regulator
	ISL8560		DC/DC Power Switching Regulator
	ISL9103		500mA 2.4MHz Low I_Q High Efficiency Synchronous Buck Converter
	ISL9103A		500mA 2.4MHz Low I_Q High Efficiency Synchronous Buck Converter
	ISL9104		500mA 4.3MHz Low I_Q High Efficiency Synchronous Buck Converter
	ISL9104A		500mA 4.3MHz Low I_Q High Efficiency Synchronous Buck Converter
	ISL9105		600mA Low Quiescent Current 1.6MHz High Efficiency Synchronous Buck Regulator
	ISL9106		1.2A 1.6MHz Low Quiescent Current High Efficiency Synchronous Buck Regulator
	ISL9107		1.5A 1.6MHz Low Quiescent Current High Efficiency Synchronous Buck Regulator
	ISL9108		1.5A 1.6MHz Low Quiescent Current High Efficiency Synchronous Buck Regulator
	ISL9109		RF PA 1.5A DC/DC Regulator
	ISL97536		Monolithic 1A Step-Down Regulator with Low Quiescent Current