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PDF ( 数据手册 , 数据表 ) PJ3406

零件编号 PJ3406
描述 1A Synchronous Step-Down Converter
制造商 ETC
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PJ3406 数据手册, 描述, 功能
PJ3406
1.5MHz, 1A Synchronous Step-Down Converter
FEATURES
High Efficiency: Up to 96%
1.5MHz Constant Frequency Operation
1A Output Current
No Schottky Diode Required
2.0V to 5.5V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
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
Tiny SOT23-5 Package
APPLICATIONS
Cellular and Smart Phones
Wireless and DSL Modems
PDAs
Digital Still and Video Cameras
MP3 Players
GENERAL DESCRIPTION
The PJ3406 is a constant frequency,
current mode PWM 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 PJ3406 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 PJ3406 is offered in a low profile(1mm)
5-pin, thin SOT package, and is available in
an adjustable version and fixed output
voltage of 1.2V,1.5V, 1.8V,2.5V and 3.3V.
TYPICAL APPLICATION
Figure 1. Basic Application Circuit
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