Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 1 high-side power switch |
| Continuous Load | 500 mA stated |
| Input | 2.7 V to 5.5 V |
| On-Resistance | 70 mΩ stated family feature |
| Current Limit | 0.75 A minimum to 1.25 A maximum stated family range |
| Protection | Thermal and short-circuit protection, UVLO |
| Fault | Deglitched overcurrent fault reporting |
| Exact Package / Packing | SOT-23 (DBV), 5 pins; 3000-piece large reel; marking PLJI |
Product Overview
TPS2051BDBVR is a classic current-limited high-side switch for USB-style 5 V ports and other capacitive loads. It provides controlled turn-on, short-circuit current limiting and a fault indication instead of relying on a fuse or bare MOSFET.
Its 2.7–5.5 V operating range makes it more flexible on lower-voltage distribution rails than the later TPS2051C variant, whose source range is oriented to 4.5–5.5 V USB power.
The B generation does not imply the same reverse-blocking/output-discharge feature set as the C generation. Exact family generation therefore matters even when the part numbers appear nearly identical.
For related devices, see HKEQGOO’s Power Distribution Switches, Load Drivers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TPS2051BDBVR |
| Channels | 1 high-side power switch |
| Continuous Load | 500 mA stated |
| Input | 2.7 V to 5.5 V |
| On-Resistance | 70 mΩ stated family feature |
| Current Limit | 0.75 A minimum to 1.25 A maximum stated family range |
| Protection | Thermal and short-circuit protection, UVLO |
| Fault | Deglitched overcurrent fault reporting |
| Exact Package / Packing | SOT-23 (DBV), 5 pins; 3000-piece large reel; marking PLJI |
| Manufacturer Status | Active / Production |
| Part Marking | PLJI |
Functional Highlights
Current limiting protects both port and upstream supply
A short or heavy capacitive load is held to a controlled current so the main rail has less risk of collapsing.
Deglitched fault reporting avoids brief false alarms
Transient inrush events can be filtered before the host sees the overcurrent indication, reducing nuisance fault handling.
Design Considerations
- Check worst-case current-limit range against both load startup and upstream supply capacity.
- Account for MOSFET dissipation during prolonged current limit; thermal shutdown is protection, not a normal operating mode.
- Do not assume reverse-current blocking/output discharge from TPS2051C applies to TPS2051B.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TPS2051BDBVR as Active / Production; SOT-23 (DBV), 5 pins; 3000-piece large tape and reel; −40°C to +125°C; marking PLJI.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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