M3406 Ver la hoja de datos (PDF) - Unspecified
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M3406 Datasheet PDF : 9 Pages
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AEROSEMI
M3406
CASC
800mA,2V-6V Input,1.5MHz
Synchronous Step-Down Converter
FEATURES
High Efficiency: Up to 96%
1.5MHz Constant Frequency Operation
800mA Output Current
No Schottky Diode Required
2V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
PFM Mode for High Efficiency in Light Load
100% Duty Cycle in Dropout Operation
Low Quiescent Current: 20μA
Slope Compensated Current Mode Control for
Excellent Line and Load Transient Response
Short Circuit Protection
Thermal Fault Protection
Inrush Current Limit and Soft Start
<1μA Shutdown Current
SOT23-5 package
GENERAL DESCRIPTION
The M3406 is a constant frequency, current mode
step-down converter. The device integrates a main
switch and a synchronous rectifier for high
efficiency without an external Schottky diode. It is
ideal for powering portable equipment that runs
from a single cell Lithium-Ion (Li+) battery. The
output voltage can be regulated as low as 0.6V.
The M3406 can also run at 100% duty cycle for
low dropout operation, extending battery life in
portable system. This device offers two operation
modes, PWM control and PFM Mode switching
control, which allows a high efficiency over the
wider range of the load.
The M3406 is offered in a low profile 5-pin, SOT
package, and is available in an adjustable version.
APPLICATIONS
Cellular and Smart Phones
Wireless and DSL Modems
PDAs
Portable Instruments
Digital Still and Video Cameras
DTV
TYPICAL APPLICATION
VIN
CIN
10μF
VIN
SW
M3406
EN
FB
GND
L 2.2μH
R1
200k
1%
R2
100k
1%
C1
22pF
opt.
VOUT
COUT
10μF
Figure 1. Basic Application Circuit
M3406 Rev1.0
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