Task: Formula-prediction-context (source dataset: ti-random)

You are given an table region extracted from a real Excel spreadsheet, which is centered around a cell called "Target Cell" (labeled as "[Target Cell]" shown in the table below). The table region below includes up to 10 rows above/below the Target Cell, and 10 columns to the left/right of the Target Cell. 

Your task is to analyze the table context surrounding the Target Cell, and predict the most likely Excel formula that should go in the Target Cell. If multiple formulas are possible, choose the most reasonable or commonly used based on context.

1. Please follow the standard formula syntax in Excel, e.g. always begins with an equal sign (=).
2. Base your predicted formula on the surrounding table context, e.g., column headers, annotations, and data values in nearby cells.
3. No explanation — just output the formula itself in a JSON format: {"formula": "your_formula_here"}.

Input Excel Snippet in Markdown format:
|    | G     | H                                                 | I   | J                           | K   | L   | M   | N   | O   | P                                   | Q             | R   | S   | T   | U   | V   | W   |
|---:|:------|:--------------------------------------------------|:----|:----------------------------|:----|:----|:----|:----|:----|:------------------------------------|:--------------|:----|:----|:----|:----|:----|:----|
|  2 | Units | Description                                       |     |                             |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  3 |       |                                                   |     |                             |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  4 |       | Select IC part number                             |     | Key                         |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  5 | V     | IC rated minimum input voltage with external bias |     | User Entered Value          |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  6 | V     | IC rated minimum input voltage with internal bias |     | Fixed IC Parameter          |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  7 | V     | IC rated maximum input voltage                    |     | Calculated Parameter        |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  8 | V     | Internal voltage reference                        |     | Recommended Component Value |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
|  9 | A     | IC rated maximum output current                   |     | Design Caution              |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
| 10 | V     | Internal Vreg regulator output voltage            |     | Design Warning              |     |     |     |     |     |                                     |               |     |     |     |     |     |     |
| 11 | V     | EN rising voltage threshold                       |     |                             |     |     |     |     |     | Calculated component values summary |               |     |     |     |     |     |     |
| 12 | V     | EN falling voltage threshold                      |     |                             |     |     |     |     |     | MODE                                | [Target Cell] | kΩ  |     |     |     |     |     |
| 13 |       | Over current fault response                       |     |                             |     |     |     |     |     | Lout                                | 0.44          | µH  |     |     |     |     |     |
| 14 |       | Over voltage fault response                       |     |                             |     |     |     |     |     | Cout                                | 540           | µF  |     |     |     |     |     |
| 15 | A     | Valley current limit maximum clamp                |     |                             |     |     |     |     |     | Rtrip                               | 162.61        | kΩ  |     |     |     |     |     |
| 16 |       | Gain for Rtrip calculation                        |     |                             |     |     |     |     |     | Cin                                 | 100           | µF  |     |     |     |     |     |
| 17 | ns    | Worst case minimum on-time                        |     |                             |     |     |     |     |     | Rfb_b                               | 10            | kΩ  |     |     |     |     |     |
| 18 | ns    | Worst case minimum off-time                       |     |                             |     |     |     |     |     | Rfb_t                               | 20            | kΩ  |     |     |     |     |     |
| 19 | mΩ    | High-side FET Rdson                               |     |                             |     |     |     |     |     | Cff                                 | 470           | pF  |     |     |     |     |     |
| 20 | mΩ    | Low-side FET Rdson                                |     |                             |     |     |     |     |     | Css                                 | #REF!         | nF  |     |     |     |     |     |
| 21 |       |                                                   |     |                             |     |     |     |     |     | Ren_t                               | 499           | kΩ  |     |     |     |     |     |
| 22 | V     | Minimum input voltage                             |     |                             |     |     |     |     |     | Ren_b                               | 100           | kΩ  |     |     |     |     |     |



min_row: 2
max_row: 22
min_col: 7
max_col: 23
target_cell_row_idx: 12
target_cell_col_idx: 17
target_cell_value: GND
formula: =D31