Soft-start programming pin; controls output voltage ramp-up time via an external capacitor.
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Use a digital multimeter to measure continuity from the SW node to GND . A readings close to 0 ohms implies either a ruptured high-side MOSFET inside the 9E102 or shorted ceramic filtering capacitors.
) : Typically fixed at 550 kHz, adaptive across 300 kHz to 1.2 MHz : 90 mΩ (Typical) Low-Side MOSFET On-Resistance : 70 mΩ (Typical) Quiescent Current ( IQcap I sub cap Q ) : 10 µA Operating Supply Current : 290 µA 9e102 datasheet
Based on aggregation of AVX, Murata, and Samsung Electro-Mechanics datasheets for , here are the standard parameters for a 9E102-compatible part.
A minority of component listings also show a device labeled simply “9E102” in an SOP-8 package, with specifications distinct from the BD9E102FJ. However, the overwhelming majority of references to “9e102 datasheet” lead directly to the ROHM BD9E102FJ.
A voltage divider connected to the FB pin determines the final output voltage. Share public link Use a digital multimeter to
: Prevents erratic behavior by shutting down the circuit if the input supply falls below 7.0V. Pin Configuration and Functions
| Parameter | Conditions / Note | Min. | Typ. | Max. | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | | Operating range | 7.0 | — | 26.0 | V | | Output Voltage (VOUT) | Adjustable range | 1.0 | — | VIN × 0.7 | V | | Output Current (IOUT) | — | — | — | 1.0 | A | | Switching Frequency | — | 484 | 570 | 656 | kHz | | High-Side MOSFET RDS(on) | Typical value | — | 250 | — | mΩ | | Low-Side MOSFET RDS(on) | Typical value | — | 200 | — | mΩ | | Shutdown Current | EN = 0V, TA = 25°C | — | 0 | 2.0 | μA | | Operating Temperature | — | -40 | — | +85 | °C |
The SOP-J8 package layout utilizes an optimized pinout designed to separate high-current switching paths from sensitive analog feedback circuits. A minority of component listings also show a
In some industrial settings, 9E102 is used as a document reference for crane control wire markings
■ 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