TS3406_08 Datasheet, PDF (1/7 Pages) Taiwan Semiconductor Company, Ltd – 600mA / 1.5MHz Synchronous Buck Converter

TS3406
600mA / 1.5MHz Synchronous Buck Converter
SOT-25
Pin Definition:
1. EN
2. Ground
3. Switching Output
4. Input
5. Feedback
General Description
The TS3406 is a high efficiency monolithic synchronous buck regulator using a 1.5MHz constant frequency, current
mode architecture. The device is available in an adjustable version. Supply current with no load is 300µA and drops to
<1µA in shutdown. The 2.5V to 5.5V input voltage range makes the TS3406 ideally suited for single Li-Ion battery-
powered applications. 100% duty cycle provides low dropout operation, 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 TS3406 can supply 600mA of load current at VCC=3V.
Features
● High Efficiency: Up to 96%
● 2.5V to 5.5V Input Voltage Range
● Short Circuit Protection (SCP)
● 1.5MHz Constant Frequency Operation
● Low Dropout Operation: 100% Duty Cycle
● 0.6V Reference Allows Low Output Voltages
● 600mA Output Current at Vcc=3V
● Low Quiescent Current: 300uA
● No Schottky Diode Required in Application
● ≤1uA Shutdown Current
● Current Mode Operation for Excellent Line and Load
Transient Response
Ordering Information
Part No.
TS3406CX5 RF
Package
SOT-25
Packing
3Kpcs/ 7” Reel
Application
● Cellular Phones
● Digital Still Cameras
● Portable Electronics
● USB Devices
Pin Description
Name
EN
GND
SW
VCC
FB
Description
Power-off pin
Hjnormal operation
LjStep-down operation stopped
(All circuits deactivated)
Ground pin
Switch output pin. Connect external inductor
here. Minimize trace area at this pin to
reduce EMI.
IC power supply pin
Output Feedback pin
Application Circuit
1/7
Version: B07