9e102: Datasheet

| Parameter | Value / Range | |-----------|----------------| | | 7.0V to 26V | | Output voltage range | 1.0V to VIN × 0.7V (adjustable via external resistors) | | Maximum output current | 1.0A | | Switching frequency | 570kHz (typical) | | Topology | Buck (step-down) | | Package | SOP-J8 (8-pin small outline package) | | Operating temperature | -40°C to +85°C | | Standby current | 0μA (typical) | | High-side MOSFET RDS(ON) | 250mΩ (typical) | | Low-side MOSFET RDS(ON) | 200mΩ (typical) |

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– High-logic turns the IC on; low logic puts the buck converter into a low-power shutdown state.

The datasheet sat in the dark at the back of a drawer, its lines now part legend, part warning. The story of 9e102 lived not only in metal and ceramic but in the few people who had chosen to treat memory like more than fuel. They argued, sometimes, about what the right choices had been. They argued until the arguments themselves became part of the world the module had helped stabilize—a world that would, like any other, be remembered or forgotten according to the small, stubborn acts of people who still chose to care. 9e102 datasheet

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For more detailed design files, refer to the ROHM BD9E102FJ Datasheet .

– Common reference ground for the control circuitry and power stage. | Parameter | Value / Range | |-----------|----------------|

The loop bandwidth is typically optimized around 22.4 kHz to manage load fluctuations efficiently. 5. Pin Configuration and Functions

Used to set the output voltage ( 4. Performance and Efficiency

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■ Adjustable output voltage range: 1.0V to VIN x 0.7V. ■ Maximum output current: 1.0 A (Max.) ■ Switching frequency: 570 kHz (Typ. BD9E102FJ-GE2 ROHM Semiconductor - Mouser Electronics

The apprentice folded the page back into its envelope and laid it with the tools they used to fix things. They had learned the lesson the hard way: that every repair carries a remnant, and that some of those remnants are the deliberate, human things that make a life more than a collection of working parts.