SLVSAM8D July 2013 – August 2019 TPS63050 , TPS63051

PRODUCTION DATA.

- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information

The TPS6305x devices have an internal user programmable current limit that monitors the input current during start-up. This prevents high inrush current protecting the device and the application. During start-up the input current does not exceed the current limit that is set by I_{LIM0} pin and I_{LIM1} pin. Depending on the logic level applied at these two pins, switching between four different current limit-levels is possible. The variation of those values over input voltage and temperature is shown in Figure 1 through Figure 2. Adjusting the soft-start time further using the soft-start capacitor is possible.

I_{LIM0 } and I_{LIM1} set the current limit as listed in Table 2.

ILIM1 | ILIM0 | CURRENT LIMIT SET (WCSP) | CURRENT LIMIT SET (HotRod) |
---|---|---|---|

Low | Low | 0.4 × I_{IN_MAX} |
Not Available |

Low | High | 0.5 × I_{IN_MAX} |
Not Available |

High | Low | 0.65 × I_{IN_MAX} |
0.65 × I_{IN_MAX} |

High | High | I_{IN_MAX} |
I_{IN_MAX} |

The I_{LIM0}, I_{LIM1} pins can be changed during operation.

Given the curves provided in Figure 1 through Figure 2, calculating the output current in the different condition in boost mode is possible using Equation 1 and Equation 2 and in buck mode using Equation 3 and Equation 4.

Equation 1.

Equation 2.

Equation 3.

Equation 4.

where

- For η, use the number from the efficiency curves or 0.9 as an assumption.