Document
ESMT/EMP
EML3020
1.5MHz 1A, Synchronous Step-Down Regulator
General Description
EML3020 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
Features
Achieve 97% efficiency Input voltage : 2.5V to 5.5V Output current up to 1A Reference voltage: 0.6V Quiescent current 15μA 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. The device can accept input voltage from 2.5V to 5.5V and deliver up to 1A output current. High 1.5MHz 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. EML3020 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 both of TDFN-6 2x2mm and SOT-23-5 package.
Applications
Blue-Tooth devices Cellular and Smart Phones Personal Multi-media Player (PMP) Wireless networking Digital Still Cameras Portable applications
Typical Application
EML3020 2.2uH 22pF Cin* 4.7uF EN 2 6 R2 (450KΩ) R1 (100KΩ) Cout* 10uF
VIN
3
VIN
SW
4
VOUT (3.3V)
RUN GND 5
VFB
* Ceramic capacitor
Fig. 1
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc. Publication Date: Jan. 2011 Revision: 1.1 1/15
ESMT/EMP
Package Configuration
EML3020-00FE06NRR 00 FE06 NRR Adjustable
EML3020
TDFN-6 (2x2mm) Package RoHS & Halogen free package Commercial Grade Temperature Rating: -40 to 85°C Package in Tape & Reel
TDFN-6 (2x2mm)
EML3020-00VF05NRR 00 VF05 NRR Adjustable SOT-23-5 Package RoHS & Halogen free package Commercial Grade Temperature Rating: -40 to 85°C Package in Tape & Reel
SOT-23-5
Order, Mark & Packing information
Package Vout(V) Product ID Marking
6 5 4
Packing
TDFN-6
adjustable EML3020-00FE06NRR
3020
Tracking Code
1 PIN1 DOT 2 3
Tape & Reel 3K units
SOT-23-5
adjustable EML3020-00VF05NRR
Tape & Reel 3K units
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date: Jan. 2011 Revision: 1.1 2/15
.