EC3210 Datasheet, PDF (1/16 Pages) E-CMOS Corporation – 1.5MHz, 800mA, Synchronous Step-Down Regulator Dropout

1.5MHz, 800mA, Synchronous
Step-Down Regulator Dropout
EC3210
GENERAL DESCRIPTION
The EC3210 is a high efficiency monolithic synchronous
buck regulator using a constant frequency, current mode
architecture. The device is available in an adjustable
version.
Supply current during operation is only 20mA and drops
to ≤1mA in shutdown. The 2.5V to 5.5V input voltage
range makes the EC3210 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 EC3210 is available in a
low profile (1mm) TSOT23-5 package.
Applications
● Cellular Telephones
● Personal Information Appliances
● Wireless and DSL Modems
● Digital Still Cameras
● MP3 Players
● Portable Instruments
Package Type
FEATURES
 High Efficiency: Up to 96%
 High Efficiency at light loads
 Very Low Quiescent Current: Max 70uA During
Operation
 800mA Output Current
 2.5V to 5.5V Input Voltage Range
 1.5MHz Constant Frequency Operation
 No Schottky Diode Required
 Low Dropout Operation: 100% Duty Cycle
 0.6V Reference Allows Low Output Voltages
 Shutdown Mode Draws ≤1uA Supply Current
 Current Mode Operation for Excellent Line and Load
 Transient Response
 Over-temperature Protected
 Low Profile (1mm) TSOT23-5 Package
TSOT23-5
Figure 1. Package Types of EC3210
E-CMOS Corp. (www.ecmos.com.tw)
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