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Número de pieza | EML3025 | |
Descripción | Synchronous Step-Down Regulator | |
Fabricantes | Elite Semiconductor | |
Logotipo | ||
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Preliminary
EML3025
2.25MHz 1A, Synchronous Step-Down Regulator
General Description
EML3025 is a high efficiency step down DC/DC
converter. It features an extremely low quiescent
current, which is suitable for reducing standby
power consumption, especially for portable
applications.
The device can accept input voltage from 2.5V to
5.5V and deliver up to 1A output current. High
2.25MHz switching frequency allows the use of small
surface mount inductors and capacitors to reduce
overall PCB board space. Furthermore, the built-in
synchronous switch improves efficiency and
eliminates external Schottky diode. EML3025 uses
different modulation algorithms for various loading
conditions: (1) Pulse Width Modulation (PWM) for low
output voltage ripple and fixed frequency noise, (2)
Pulse Frequency Modulation (PFM) for improving
light load efficiency, and (3) Low Dropout (LDO)
Mode for providing 100% duty cycle operation
during heavy loading. Adopting low reference
voltage design reduces regulated output to 0.6V.
The adjustable version of this device is available in
SOT-23-5 package.
Features
Achieve 97% efficiency
Input voltage : 2.5V to 5.5V
Output current up to 1A
Reference voltage: 0.6V
Quiescent current 17μA with no load
Internal switching frequency: 2.25MHz
No Schottky diode needed
Low dropout operation: 100% duty cycle
Shutdown current < 1μA
Excellent line and load transient response
Over-temperature protection
Applications
Blue-Tooth devices
Cellular and Smart Phones
Personal Multi-media Player (PMP)
Wireless networking
Digital Still Cameras
Portable applications
Typical Application
Fig. 1
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date: Oct. 2011
Revision: 0.1
1/13
1 page |
Páginas | Total 1 Páginas | |
PDF Descargar | [ Datasheet EML3025.PDF ] |
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