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PDF EML3408 Data sheet ( Hoja de datos )
| Número de pieza | EML3408 | |
| Descripción | Synchronous Step-Down Regulator | |
| Fabricantes | Elite Semiconductor | |
| Logotipo |  |
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ESMT/EMP
EML3408
1.5MHz 800mA, Synchronous Step-Down Regulator
General Description
EML3408 is designed with high efficiency step down
DC/DC converter for portable devices applications.
It features with extreme low quiescent current with
no load which is the best fit for extending battery life
during the standby mode. The device operates from
2.5V to 5.5V input voltage and up to 800mA output
current capability. High 1.5MHz internal frequency
makes small surface mount inductors and
capacitors possible and reduces overall PCB board
space. Further, build-in synchronous switch makes
external Schottky diode is no longer needed and
efficiency is improved. EML3408 is designed base
on pulse width modulation (PWM) for low output
voltage ripple and fixed frequency noise, low
dropout mode provides 100% duty cycle operation.
Low reference voltage is designed for achieving
regulated output down to 0.6V.
The device is available in an adjustable version and
fixed output voltages of 1.2V, 1.5V, 1.8V and 3.3V.
The EML3408 is available in SOT-23-5 package.
Features
Achieve 95% efficiency
Input Voltage : 2.5V to 5.5V
Output Current up to 800mA
Reference voltage 0.6V
Quiescent Current 200μA with No Load
Internal switching frequency 1.5MHz
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
Vin
。3.3 – 5.5V
Cin
4.7 uF
。CER
EN
4 VIN SW 3
1 EN VFB 5
2 GND
2.2 uH
22 pF
。Vout 2.7V
Cout
10uF
CER
R2 (350KΩ)
R1 (100KΩ)
FIG.1
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date: May 2011
Revision: 1.3
1/16
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet EML3408.PDF ] | |
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