USER'S GUIDE
TPS53353 Step-Down Converter Evaluation Module User's Guide
Trademarks
D-CAP is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
1 Description
The TPS53353EVM-744 is designed to use a regulated 12-V bus to produce a regulated 1.5-V output at up to 20 A of load current. The TPS53353EVM-744 is designed to demonstrate the TPS53353 in a typical low-voltage application while providing a number of test points to evaluate the performance of the TPS53353.
1.1 Typical Application
- Server/storage
- Workstations and desktops
- Telecommunication infrastructure
1.2 Features
The TPS53353EVM-744 features:
- 20-Adc, steady-state output current
- Support prebias output voltage start-up
- J5 for selectable switching frequency setting
- J4 for selectable soft-start time
- J2 for enable function
- J6 for auto-skip and forced CCM selection
- Convenient test points for probing critical waveforms
2 Electrical Performance Specifications
Table 2-1 TPS53353EVM-744 Electrical
Performance Specifications
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNITS |
|---|---|---|---|---|---|
| Input Characteristics | |||||
| Voltage range | VIN | 8 | 12 | 14 | V |
| Maximum input current | VIN = 8 V, IO = 20 A | 4.1 | A | ||
| No-load input current | VIN = 14 V, IO = 0 A with auto-skip mode | 1 | mA | ||
| Output Characteristics | |||||
| Output voltage VOUT | 1.5 | V | |||
| Output voltage regulation | Line regulation (VIN = 8 V – 14 V) | 0.1 | % | ||
| Load regulation (VIN = 12 V, IO = 0 A – 20 A) | 1 | ||||
| Output voltage ripple | VIN = 12 V, IO = 20 A | 20 | mVpp | ||
| Output load current | 0 | 20 | A | ||
| Output overcurrent | 26 | A | |||
| Systems Characteristics | |||||
| Switching frequency | 500 | kHz | |||
| Peak efficiency | VIN = 12 V, 1.5 V/10 A | 91.87 | % | ||
| Full-load efficiency | VIN = 12 V, 1.5 V/20 A | 91.38 | % | ||
| Operating temperature | 25 | °C | |||
Note:
Jumpers are set at the factory to default locations; for details, see Section 5 of this user’s guide.
3 Schematic
Figure 3-1 TPS53353EVM-744 Schematic
