TPS259470ARPWR - 5.5A eFuse w/ Reverse Polarity Protection | TI
部品番号: TPS259470ARPWR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.42 | $1,420.00 |
| 3,000 | $1.21 | $3,630.00 |
TPS259470ARPWR 概要
An electronic fuse (eFuse) is a solid-state power switch and protection IC that replaces traditional PTC fuses, Schottky OR-ing diodes, and discrete hot-swap circuits. It sits between a system input rail and downstream converters, providing controlled turn-on, accurate current limiting, and fast interruption on fault. The TPS259470 in particular is part of TI's hot-swap/eFuse family that combines input reverse polarity protection, true reverse-current blocking (does not rely on body diode conduction), programmable overvoltage, and fault output signaling in one IC.
Key specifications include a 28 mΩ typical on-resistance, 5.5 A continuous load current capability, adjustable overvoltage lockout, active current limit with auto-retry response, and an open-drain fault indicator (FLT). The integrated reverse polarity protection eliminates the need for a series input Schottky diode, reducing conduction loss by typically 30-60% versus traditional reverse-polarity Schottky solutions, while true reverse-current blocking prevents back-feeding when a higher-voltage adapter is hot-plugged in parallel with a lower-voltage source.
Architecturally, the TPS259470 uses an internal N-channel MOSFET with a charge-pump gate driver, a precision current-sense amplifier, and a fault state machine. The 2.7 V UVLO ensures clean startup in low-voltage USB-PD and industrial 5 V/12 V/19 V/20 V rails. Because the IC is characterized for -40 °C to +125 °C junction and is available in a thermally enhanced VQFN-HR 2x2 mm package, it is suitable for compact, high-ambient-temperature applications where PCB area is at a premium.
Typical applications include USB Type-C / USB-PD source and sink protection, multi-port USB hubs, industrial PLC and sensor power rails, telecom router line cards, and battery backup systems. The device is especially useful wherever an adapter, battery, or USB-PD source must be hot-plugged into a live system without causing inrush latch-up or back-power through the input.
When designing in, keep input/output traces short and use low-ESR ceramic bypass capacitance close to VIN and PGND. The TIMER capacitor sets the fault retry interval and must be sized for the actual upstream supply ramp rate. Always cross-check thermal dissipation versus continuous load to avoid triggering thermal shutdown in enclosed adapters. This page distills datasheet values, drop-in alternatives, and design notes not available on the manufacturer summary page to help engineers select and implement the part quickly.
ドロップイン代替品: TPS259470ARPWR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
TPS259470LRPWR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS259470ARPW
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS259470ARPWT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS25947QPWPRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS259470QPWPR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS259470ARPWR 仕様
| 機能 | Electronic fuse (eFuse) hot-swap controller with reverse polarity protection |
| 入力電圧範囲 | 2.7 V to 23 V |
| Continuous Load Current | 5.5 A |
| Typical On-Resistance | 28 mΩ |
| Overvoltage Protection | Adjustable OVLO |
| Current Limit Type | Active current limit with auto-retry |
| Reverse Polarity Protection | Integrated (true reverse current blocking) |
| Undervoltage Lockout (UVLO) | 2.7 V (fixed) |
| Fault Output | Open-drain FLT (active-low) |
| 動作接合温度 | -40 °C to +125 °C |
| パッケージ | 10-pin VQFN-HR (RPW) 2x2 mm |
| 実装タイプ | Surface Mount |
| Pb-Free / RoHS | Pb-free, RoHS compliant |
TPS259470ARPWR ピン構成
| ピン 1 | VIN — Input supply voltage (2.7 V to 23 V) |
| ピン 2 | EN/UVLO — Enable input / undervoltage lockout threshold |
| ピン 3 | OVLO — Adjustable overvoltage lockout threshold |
| ピン 4 | ILIM — Current-limit programming resistor |
| ピン 5 | dV/dt — Soft-start ramp programming capacitor |
| ピン 6 | TIMER — Fault retry interval programming capacitor |
| ピン 7 | FLT — Open-drain fault indicator (active low) |
| ピン 8 | OUT — Regulated output to downstream load |
| ピン 9 | PGND — Power ground |
| ピン 10 | GND — Signal ground |
主な用途
TPS259470ARPWR の用途: 6 件s: USB Type-C / USB-PD Source Protection, Multi-Port USB Hub Power Distribution, Industrial PLC and Sensor Power Rail Protection, Telecom Router Line-Card Protection, Battery Backup and OR-ing Replacement, Hot-Plug Adapter Selection in Multi-Input Systems.
USB Type-C / USB-PD Source Protection
The TPS259470ARPWR's 2.7 V to 23 V input range covers every standard USB-PD fixed voltage (5 V, 9 V, 15 V, 20 V) plus PPS, while the 28 mΩ on-resistance adds less than 100 mV of drop at 3 A on a 5 V rail. Integrated reverse-polarity protection prevents back-feeding when two sources are hot-plugged into the same rail. Placed between the VBUS input and downstream PD controller, the IC handles inrush at attach, blocks reverse current, and reports fault events through the FLT pin for the system MCU. Designers get clean Type-C source behavior without external Schottky diodes, saving up to 0.7 V of available headroom in tightly-budged 5 V rails.
おすすめ
Multi-Port USB Hub Power Distribution
In a multi-port USB hub, the TPS259470ARPWR acts as a per-port or per-bus guardian between the upstream VBUS and downstream ports. Its 5.5 A continuous current handles aggregated downstream load while adjustable current limit prevents a single port fault from collapsing the entire bus. True reverse-current blocking protects against accidental back-power when a downstream device sources 5 V upstream. Programmable OVLO rejects mis-wired 9 V/12 V/20 V sources on a 5 V-only hub. Auto-retry fault recovery lets the hub clear a fault without external intervention, and the FLT pin can drive per-port LEDs for user feedback.
おすすめ
Industrial PLC and Sensor Power Rail Protection
Industrial 24 V nominal rails commonly spike to 36 V and below to 18 V, well within the TPS259470ARPWR's 2.7 V to 23 V input envelope when protected by upstream TVS clamping. The 28 mΩ path resistance minimizes thermal rise in enclosures — at 2 A continuous, dissipation is only ~0.11 W. Integrated reverse-polarity protection survives wiring errors during commissioning. Adjustable OVLO lets the same PCB accept 12 V or 24 V systems with a resistor change. The -40 °C to +125 °C junction rating covers outdoor cabinet and factory-automation environments where ambient temperatures regularly exceed 70 °C.
おすすめ
Telecom Router Line-Card Protection
In telecom line cards the TPS259470ARPWR protects downstream -48 V-tolerant DC-DC converters from surges, mis-wired feeds, and overload events. While standard -48 V rails exceed the 23 V maximum, the device fits perfectly on the +12 V or +5 V intermediate rails stepping down from an upstream isolated brick. The 5.5 A capability handles line-card housekeeping loads; OVLO rejects transient spikes; and FLT drives a supervisory CPLD for telemetry. Reverse-polarity protection guards against reverse-wired technician test setups, a common field-failure mode.
おすすめ
Battery Backup and OR-ing Replacement
When replacing discrete OR-ing Schottky diodes in a battery-backed system, the TPS259470ARPWR's true reverse-current blocking eliminates back-feeding from a primary adapter into a depleted battery. Its 28 mΩ path dissipates substantially less power than a Schottky diode — at 3 A continuous, loss drops from ~1 W to ~0.27 W, a 73% reduction. The integrated OVP/UVLO works with battery chemistries from 1S Li-ion (3.7 V) through 4S lead-acid (48 V bus) via upstream converters. Auto-retry fault response handles temporary overloads without operator intervention.
おすすめ
Hot-Plug Adapter Selection in Multi-Input Systems
The TPS259470ARPWR is well-suited to systems that accept power from multiple adapters (USB-C, barrel jack, docking station) and must coordinate insertion events. Its dV/dt-controlled soft-start prevents inrush that could trip upstream USB-C PD current limits, while the FLT pin signals the system MCU when one input is faulted. Active current limit protects downstream rails against adapters that exceed their rated current. Across all use cases, the eFuse's 28 mΩ path is more efficient than a discrete P-MOSFET hot-swap circuit in the same footprint, simplifying BOM and PCB layout.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS259470ARPWR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS259470LRPWR | TPS259470ARPW | TPS259470ARPWT | TPS25947QPWPRQ1 | TPS259470QPWPR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-HR (RPW) 10-pin 2x2 mm | VQFN-HR (RPW) 10-pin 2x2 mm — same | VQFN-HR (RPW) 10-pin 2x2 mm — same | VQFN-HR (RPW) 10-pin 2x2 mm — same | VQFN-HR (RPW) 10-pin 2x2 mm — same | VQFN-HR (RPW) 10-pin 2x2 mm — same |
| Input Voltage Range | 2.7 V to 23 V | 2.7 V to 23 V | 2.7 V to 23 V | 2.7 V to 23 V | 2.7 V to 23 V | 2.7 V to 23 V |
| Continuous Load Current | 5.5 A | 5.5 A | 5.5 A | 5.5 A | 5.5 A | 5.5 A |
| Typical On-Resistance | 28 mΩ | 28 mΩ | 28 mΩ | 28 mΩ | 28 mΩ | 28 mΩ |
| Fault Response | Auto-Retry | Latch-Off | Auto-Retry | Auto-Retry | Auto-Retry | Auto-Retry |
| Reverse Polarity Protection | Integrated (true reverse-current blocking) | Integrated | Integrated | Integrated | Integrated | Integrated |
| Automotive Grade (AEC-Q100) | Not AEC-Q100 | Not AEC-Q100 | Not AEC-Q100 | Not AEC-Q100 | AEC-Q100 qualified | Not AEC-Q100 |
主な差別化要因
- Integrated true reverse-polarity protection eliminates external Schottky （vs TPS25210LRPWR)
- Higher continuous current at same footprint （vs TPS25942ARVCT)
- Wider input voltage range for multi-rail systems （vs TPS25942ARVCT)
設計ノート
Use a low-ESR ceramic bypass capacitor of at least 1 µF on VIN close to the package pin and another 1 µF on OUT to ensure stable operation during load steps. The TIMER capacitor sets the auto-retry interval — at 0.1 µF the IC waits ~100 ms before retrying, which suits most USB-PD and hot-swap applications. For very fast retry (1 ms), reduce to 1 nF. Use X7R or better dielectric; Y5V is not recommended for the TIMER or dV/dt capacitor because temperature drift causes unpredictable fault timing.
Estimated: at 5.5 A continuous on a 1 oz copper 2x2 mm footprint with no additional thermal vias, the TPS259470ARPWR dissipates approximately 0.85 W (5.5² × 0.028). Combined with θJA roughly 40-50 °C/W for the VQFN-HR RPW, junction temperature rises ~40-55 °C above ambient. For sustained 5.5 A operation in >70 °C environments, add a copper-pour array of thermal vias under the exposed pad and reduce continuous current. At lower duty cycles (e.g. 50%), the part can deliver peaks well above its steady-state rating.
Do not assume all TPS25947-family parts are drop-in compatible: the TPS259474A and TPS259475A use pin-selectable overcurrent and PGTH behavior instead of adjustable OVLO. Verify the OVLO resistor divider and fault-output pull-up topology before substituting across family members. The FLT pin is open-drain and requires an external pull-up to VCC; leaving it floating will mask fault events in production. Reverse polarity protection is internal — never add an external series Schottky thinking it 'helps'; it actually wastes 0.4-0.7 V of headroom.
Route the high-current path (VIN → internal FET → OUT) on the top copper layer with as wide and short a trace as practical. Use a copper-pour array of thermal vias under the exposed pad to connect top copper to internal ground/return planes. Keep the ILIM resistor and OVLO divider far from the OUT trace to avoid noise injection that distorts current sensing. Place the TIMER and dV/dt capacitors on a quiet signal layer with their ground returns stitching directly to the PGND pad.
コンプライアンス情報
Pb-free, RoHS compliant per TI product page. Standard RPWR part is NOT AEC-Q100 qualified — choose the Q1 suffix variant (TPS25947QPWPRQ1) for automotive. Halogen-free status and exact MSL rating not stated in the verified web data snippets.
