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Techcode - 1.5MHz 1.2A Synchronous Step-Down Regulator Dropout

Numéro de référence TD6814
Description 1.5MHz 1.2A Synchronous Step-Down Regulator Dropout
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TD6814 fiche technique
T  echcode®
 
 
 
1.5MHz 1.2A Synchronous Step-Down Regulator Dropout
DATASHEET
TD6814
General Description 
Features   
The TD6814 is a high efficiency monolithic synchronous
buck regulator using a constant frequency, current mode
architecture. The device is available in an adjustable
version and fixed output voltages of 1.5V and 1.8V.
Supply current during operation is only 20mA and drops
to 1mA in shutdown. The 2.5V to 5.5V input voltage
range makes the TD6814 ideally suited for single Li-Ion
battery-powered applications. 100% duty cycle provides
low dropout operation, extending battery life in portable
systems.Automatic Burst Mode operation increases
efficiency at light loads, further extending battery life.
Switching frequency is internally set at 1.5MHz, allowing
the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.6V
feedback reference voltage. The TD6814 is available in a
low profile (1mm) TSOT23-5 package.
 
z High Efficiency: Up to 96%
z High Efficiency at light loads
z Very Low Quiescent Current: Only 20uA During
Operation
z 1200mA Output Current
z 2.5V to 5.5V Input Voltage Range
z 1.5MHz Constant Frequency Operation
z No Schottky Diode Required
z Low Dropout Operation: 100% Duty Cycle
z 0.6V Reference Allows Low Output Voltages
z Shutdown Mode Draws 1uA Supply Current
z Current Mode Operation for Excellent Line and Load
Transient Response
z Compliance with the power requirements of USB 3.0
during suspend for USB devices
z Overtemperature Protected
z Low Profile (1mm) TSOT23-5 Package
Applications 
z Cellular Telephones
z Personal Information Appliances
z Wireless and DSL Modems
z Digital Still Cameras
z MP3 Players
z Portable Instruments
Package Types 
 
 
 
  
gure 1. PackaSgOeT T2y3p­5e s of TD6814 
  July,  02,  2011                                                        Techcode  Semiconductor  Limited                                                  www.techcodesemi.com 
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