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.