1 Features

1• Input voltage range: 4.5 V to 24 V

• Output voltage range: 0.8 V to 16 V

• 3-A maximum continuous output current

• Fixed 500-kHz switching frequency

• Support up to 97% duty cycle

• Integrated 70-mΩ and 35-mΩ MOSFETs

• Typical 3-μA shutdown current

• Typical 98-μA quiescent current

• Internal 5-ms soft-start

• Internal loop compensation for ease use

• Cycle-by-cycle current limit for both high-side and

low-side MOSFETs

• Non-latched UVP, UVLO and TSD protections

• SOT-23 (6) package

• Create a custom design using TPS56339 with the

WEBENCH® Power Designer

2 Applications

• 12-V, 19-V distributed power-bus supply

• Industrial applications

– Video surveillance and security systems

– Appliance

• Consumer application

– Digital TV and LCD monitors

– Wireless and intelligent speakers

3 Description

The TPS56339 is a 4.5-V to 24-V input voltage range,

3-A synchronous buck converter. The device includes

two integrated switching MOSFETs, internal loop

compensation and 5-ms internal soft-start to reduce

component count. By employing the SOT-23 (6)

package, the device achieves the high power density

and offers small footprint on PCB.

The TPS56339 employs Advanced Emulated Current

Mode (AECM) control that can get fast transient

response with fixed frequency. The internal adaptive

loop adjustment eliminates the need for external

compensation over a wide voltage output range.

Cycle-by-cycle current limit on the high-side protects

the device in current overload conditions and is

enhanced by a low-side sourcing current limit which

prevents current runaway. Hiccup protection will be

triggered under undervoltage and thermal shutdown

protections.