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MFG:INTERSIL  Package Cooled:MSOP  D/C:06+  

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Part Number: EL7531

 

MFG: INTERSIL

Package Cooled: MSOP

D/C: 06+

Description: The EL7531 is a synchronous, integrated FET 1A step-down regulator which operates from an input of 2.5...


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EL7531 General Description


The EL7531 is a synchronous, integrated FET 1A step-down regulator which operates from an input of 2.5V to 5.5V. The output voltage is user-adjustable with a pair of external resistors.

When the load is very light, the regulator automatically operates in the PFM mode, thus achieving high efficiency at light load (>70% for 1mA load). When the load increases to typically 250mA, the regulator automatically switches over to a voltage-mode PWM operating at nominal 1.4MHz switching frequency. The efficiency is up to 94%.

It can also operate in a fixed PWM mode or be synchronized to an external clock up to 12MHz for improved EMI performance.

EL7531 Maximum Ratings

VIN, VDD, PG to SGND . . . . . . . . . . . . . . .  . . . . . . . -0.3V to +6.5V
LX to PGND . . . . . . . . . . . . . . . . . . . . . .  . . -0.3V to (VIN + +0.3V)
SYNC, EN, VO, FB to SGND . . . . . . . . . . . . . -0.3V to (VIN + +0.3V)
PGND to SGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2A
Operating Ambient Temperature . . . . . . . . .. . . . .-40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . .  . . . . . . . . . . +125°C

CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

EL7531 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)

EL7531 Typical Application

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

EL7531 Connection Diagram

EL7531  Connection Diagram

EL7531 datasheet

EL7531
PDF/DataSheet Download

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