TS3406

600mA / 1.5MHz Synchronous Buck Converter

1/7

Version: B07

SOT-25

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.

Application

●

Cellular Phones

●

Digital Still Cameras

●

Portable Electronics

●

USB Devices

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

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≤1uA Shutdown Current

●

Current Mode Operation for Excellent Line and Load

Transient Response

Ordering Information

Part No.

Package

Packing

TS3406CX5 RF

SOT-25

3Kpcs/ 7” Reel

Pin Description

Name

Description

EN

Power-off pin

H：normal operation

L：Step-down operation stopped

(All circuits deactivated)

GND

Ground pin

SW

Switch output pin. Connect external inductor

here. Minimize trace area at this pin to

reduce EMI.

VCC

IC power supply pin

FB

Output Feedback pin

Application Circuit

Pin Definition:

1. EN

2. Ground

3. Switching Output

4. Input

5. Feedback