Features: ` 60-m MOSFET Switches for High Efficiency at 3-A Continuous Output Source or Sink Current
` Disabled Current Sinking During Start-Up
` Adjustable Output Voltage Down to 0.9 V With 1.0% Accuracy
` Wide PWM Frequency: Fixed 350 kHz, 550 kHz or Adjustable 280 kHz to 700 kHz
` Synchronizable to 700 kHz
` Load Protected by Peak Current Limit and Thermal Shutdown
` Integrated Solution Reduces Board Area and Component Count
Application· Low-Voltage, High-Density Distributed Power Systems
· Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
· Broadband, Networking and Optical Communications Infrastructure
· Power PC Series Processors
Pinout
Specifications
| |
TPS54373 |
| Input voltage range, VI |
VIN, SS/ENA, SYNC |
0.3 to 7V |
| RT |
0.3 to 6V |
| VSENSE |
0.3 to 4V |
| BOOT |
0.3 to 17V |
| Output voltage range, VO |
VBIAS, COMP, PWRGD |
0.3 to 7V |
| PH |
0.6 to 10V |
| Source current, IO |
PH |
Internally limited |
| COMP, VBIAS |
6mA |
| Sink current, IS |
PH |
|
| COMP |
6mA |
| SS/ENA, PWRGD |
10mA |
| Voltage differential |
AGND to PGND |
±0.3V |
| Operating virtual junction temperature range, TJ |
40 to 125 |
| Storage temperature, Tstg |
−65 to 150 |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
300 |
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DescriptionAs a member of the SWIFTTM family of dc/dc regulators, the TPS54373 low-input voltage high-output current synchronous buck PWM converter integrates all required active components. Included on the substrate with the listed features are a true, high performance, voltage error amplifier, TPS54373 enables maximum performance and flexibility in choosing the output filter L and C components; an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 3 V; an internally or externally set slow-start circuit to limit in-rush currents; and a power good output useful for processor/logic reset, fault signaling, and supply sequencing.
For reliable power up in output precharge applications, the TPS54373 is designed to only source current during start-up.
The TPS54373 is available in a thermally enhanced 20-pin TSSOP (PWP) PowerPADTM package, which eliminates bulky heatsinks. TI provides evaluation modules and the SWIFTTM designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.
TPS54373 Data Sheet
