■ 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
Because the chip controls high-frequency internal reference logic, it is highly sensitive to Electrostatic Discharge (ESD). Use anti-static wrist straps and grounded work mats during any diagnostic procedures.
This IC is a "go-to" for laptop power rails, specifically for and VDDQ . If you encounter a laptop with no response to the power button or "no fan spin," the 9E102 is a prime suspect. Symptoms of a failing 9E102: 9e102 datasheet
| Zone | Temperature | Ramp Rate | Time | |------|-------------|-----------|------| | Preheat | 150°C → 200°C | 1–3°C/sec | 60–120 sec | | Soak | 200°C → 245°C | < 3°C/sec | 30–60 sec | | Reflow Peak | max | — | 10 sec max | | Cooling | → 180°C | -3 to -6°C/sec | — |
To download the complete 32-page BD9E102FJ-FJ datasheet, visit reputable component distributors or the official ROHM Semiconductor website. ■ Adjustable output voltage range: 1
The 9E102 datasheet pertains to a high-efficiency, step-down (buck) regulator. It is often identified as a marking code or a specific variant for components like the MP1432DN-LF-Z , which is a 2A, 28V, 380kHz step-down converter. Package Type: SOP-8 (Standard 8-pin surface mount). Key Function:
Input (4.5V - 28V) │ ┌───────┴───────┐ │ [2] VIN │─────[1] BST ───┐ │ │ │ ── Capacitor │ [6] EN/SYNC │─────[3] SW ───┴─── Inductor ───┬─── Output (e.g., 3.3V / 5V) Enable ────>│ │ │ │ [5] FB │<──────────────────────── Resistor Divider │ │ │ │ [4] GND │─────────────────────────────────┴─── Ground └───────┬───────┘ │ Thermal Pad Component Placement & Decoupling Use anti-static wrist straps and grounded work mats
The 9E102 is a Hall Effect sensor, which is a type of non-contact sensor that detects changes in magnetic fields. It's commonly used in applications such as proximity sensing, position sensing, and current sensing.