1.5MHz 2A Synchronous Step-Down Regulator Dropout TD6817
The TD6817 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 TD6817 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 TD6817 is available in
TSOT23-5 package.
High Efficiency: Up to 96%
High Efficiency at light loads
Very Low Quiescent Current: Only 20uA During
Operation
2A 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
Overtemperature Protected
TSOT23-5 Package is Available
Applications
Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instrumentsd DSL Modems
Digital Still Cameras MP3 Players
Portable Instruments
1.5MHz 2A Synchronous Step-Down Regulator Dropout TD6817 The TD6817 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 TD6817 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 TD6817 is available in TSOT23-5 package. High Efficiency: Up to 96% High Efficiency at light loads Very Low Quiescent Current: Only 20uA During Operation 2A 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 Overtemperature Protected TSOT23-5 Package is Available Applications Cellular Telephones Personal Information Appliances Wireless and DSL Modems Digital Still Cameras MP3 Players Portable Instrumentsd DSL Modems Digital Still Cameras MP3 Players Portable Instruments
Note:Output voltage must be higher than Input Voltage
Input Voltage:2-6V(less than 3V,output power cut down)
Output Voltage:3.3V-9V adjustable(Input voltage must less than output voltage)
Output Current:Rated 2000mA (2.8V-3V input, 5V output, 1500MA output,(single lithium battery higher 2600MAH input,5V output, output current can up to 2000MA)
Note:Output voltage higher than 6V,Please connect power first,then connect load line
The RF receiver modules are widely used for data receiving and signal control. They are specified as preferred components in remote control garage, roller curtain, door locks, remote sensing, telemetry, industrial control and wireless security alarm industry.
Max voltage: 16V
Minimum voltage: 5V
Continuous current: 10A
Short maximum current: 20A (less than 10 seconds)
Speed control mode: PWM step-less speed regulation, can also be used to adjust the light
Control mode: speed control potentiometer (clockwise clicked open, continue to rotate clockwise from 1% to 99% speed)
Duty cycle: 0%-99% (0% position is the state of the switch off when the potentiometer is most on the left).
When the current is switched on, the 0.002A (long time no need to switch off the governor is no current).
Efficiency: the maximum efficiency is as high as 98%.
Volume: long 3cm (excluding potentiometer), width 2cm, height 1.4cm
Conversion efficiency: Up to 92% (output voltage higher, the higher the efficiency)
Switching Frequency: 150KHz
Rectifier: Non-Synchronous Rectification
Module Properties: Non-isolated step-down module (buck)
Short circuit protection: current limiting, since the recovery
Operating temperature: Industrial grade (-40 to +85 ) (output power 10W or less)
Full load temperature rise: 40
5 Colors 5mm F5 Ultra Bright Round LED Diode Kit Red / Green / Blue / White / Yellow
Working current: 20 (mA)
Working voltage: Red: 1.9V-2.1V
Yellow: 1.9V-2.1V
Blue:3.0V-3.2V
Green: 3.0V-3.2V
White:3.0V-3.2V
SS8050 SOT23-3 y2 smd TRANSISTOR 40v 1.5A (PNP) original JSCJ product
Polarity: PNP
Maximum Collector Power Dissipation (Pc): 0.225 W
Maximum Collector-Base Voltage |Vcb|: 40 V
Maximum Collector-Emitter Voltage |Vce|: 25 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 1.5 A
Max. Operating Junction Temperature (Tj): 150 °C
Forward Current Transfer Ratio (hFE), MIN: 200
S8050 SOT23-3 j3y TRANSISTOR (NPN)
FEATURES
Complimentary to S8550
Collector Current: IC=0.5A
MARKING: J3Y
MAXIMUM RATINGS (Ta=25℃ unless otherwise noted)
Symbol Parameter Value Unit
VCBO Collector-Base Voltage 40 V
VCEO Collector-Emitter Voltage 25 V
VEBO Emitter-Base Voltage 5 V
IC Collector Current -Continuous 0.5 A
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