TPS27082L - 8V, 3A PFET Load Switch w/ Adj. Slew Rate | TI
部品番号: TPS27082L ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.1 | $1.10 |
| 10 | $0.99 | $9.90 |
| 100 | $0.79 | $79.00 |
| 500 | $0.66 | $330.00 |
| 1,000 | $0.55 | $550.00 |
| 3,000 | $0.45 | $1,350.00 |
TPS27082L 概要
A load switch is a discrete or integrated MOSFET-based power switch used to connect or disconnect a downstream load from an upstream voltage rail, replacing mechanical relays or discrete PFET/NMOS designs. Load switches fall under the broader power management hierarchy: load switch → power distribution switch → hot-swap controller / power-path manager, commonly used to sequence rails, isolate transients, and reduce quiescent leakage in battery-powered systems. The TPS27082L's P-channel topology drives the gate from an internal charge pump referenced to VIN, eliminating the need for a higher-voltage bias rail.
Key features include a low 44 mΩ on-resistance at VIN = 5 V, configurable inrush slew rate via an external R1/C1 network, fast transient isolation (>40 dB attenuation of VIN step transients when the PFET is OFF), and a hysteretic ON/OFF control threshold to prevent chattering near the switch point. An open-drain Power Good (PGOOD) output is asserted when VOUT reaches approximately 90% of VIN. Quiescent current is held below the in the OFF state, optimizing sleep-mode battery life.
The architecture uses a single P-channel MOSFET for the main power path and a separate NMOS for level-shifted gate drive. The TPS27082L integrates a controlled soft-start mechanism via the R1/C1 timing network, limiting di/dt at turn-on and therefore the inrush current drawn by downstream bulk capacitors. The hysteretic comparator prevents multiple transitions when VIN ramps slowly through the ON threshold.
Typical applications include power distribution in solid-state drives (SSD), hard-disk drives (HDD), notebook and tablet platforms, multi-rail sequencing in industrial PCs, USB port power switching, and battery-powered consumer devices that require sleep-mode isolation.
When designing with TPS27082L, place the R1/C1 timing components close to the device pins. Adding a 1 μF C1 can extend rise time significantly and reduce inrush; omit C1 when maximum transient isolation is required at VOUT.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes (R1/C1 selection, hysteresis tuning, PGOOD wiring) not found in the manufacturer datasheet alone.
ドロップイン代替品: TPS27082L — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TPS27082L （同一形状・フットプリント） — 相違点: Function, Operating Temperature Range, Package.
クイック比較ツール — 並列比較する代替部品を選択:
TPS27081ADDCR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS22918CDBVR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS22902YZFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS22920YZFR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
NCP45525IMNGEVG
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS27082L 最大定格＆電気的特性
| 機能 | High-side load switch |
| トポロジー | P-Channel MOSFET with NMOS gate driver |
| Input Voltage Range (VIN) | 1.2 V to 8 V |
| Continuous Load Current | 3 A |
| On-Resistance (RON) at VIN = 5 V | 44 mΩ (typical) |
| Rise Time Control | Adjustable via external R1/C1 |
| Transient Isolation (OFF state) | Fast transient attenuation when PFET is OFF |
| Hysteretic Control | Yes (programmable threshold with hysteresis) |
| Power Good (PGOOD) Output | Open-drain, asserts when VOUT ~90% of VIN |
| 動作温度範囲 | -40 °C to +85 °C |
| パッケージ | TSOT-23-6 (DDC) 2.9x1.6 mm |
| 実装タイプ | Surface Mount |
| MSLレベル | 2 (per JEDEC J-STD-020) |
| Lead Free / RoHS | Yes / Compliant |
TPS27082L ピン構成
| ピン 1 | ON/OFF — Active-high logic input that enables the load switch |
| ピン 2 | GND — Ground reference for control and power circuits |
| ピン 3 | VIN — Input supply voltage (1.2 V to 8 V) and source of internal P-FET |
| ピン 4 | VOUT — Switched output to the load |
| ピン 5 | PGOOD — Open-drain power-good output, asserts when VOUT ~90% of VIN |
| ピン 6 | TIMER — R1/C1 rise-time control network connection |
主な用途
TPS27082L の用途: 7 件s: SSD / HDD Power Rail Switching, Notebook and Tablet Platform Power Management, USB Port Power Switching, Battery-Powered Industrial Sensor Modules, Multi-Rail Sequencing for Industrial PCs, Hot-Swap / Plug-In Card Power Gating, Consumer Audio Accessory Power Switching.
SSD / HDD Power Rail Switching
The TPS27082L's 1.2 V to 8 V VIN range and 3 A load current make it ideal for sequencing the 3.3 V/5 V supply rails of solid-state drives (SSD) and spinning-disk hard drives (HDD) in storage subsystems. The integrated P-channel MOSFET with NMOS gate drive eliminates the discrete PFET+gate-driver BOM that typically occupies 4-6 components on a storage card edge. Its adjustable rise time via R1/C1 controls the inrush current that downstream DC-DC converters and bulk caps see at hot-plug events, while the open-drain PGOOD output flags to a host controller that the rail is stable before downstream blocks are enabled.
おすすめ
Notebook and Tablet Platform Power Management
Inside a notebook or tablet motherboard, the TPS27082L sits between the system 3.3 V or 5 V rail and downstream peripherals such as WWAN modules, touch controllers, or external display drivers. Its 44 mΩ typical on-resistance yields only a 132 mV drop at full 3 A load, preserving headroom for downstream regulators and reducing wasted heat in the load path. The fast transient isolation (>40 dB attenuation per the TI datasheet) prevents upstream switching noise from the main buck regulator from disturbing the downstream load during deep-sleep and wake events - a critical requirement for low-power SoC platforms.
おすすめ
USB Port Power Switching
The TPS27082L provides a compact, integrated solution for USB Type-A downstream ports that need over-current-tolerant switching and soft-start to suppress inrush into USB device bulk caps. Its 8 V VIN tolerance supports bus-powered hubs fed from a 5 V switching regulator, while the 3 A continuous rating easily handles BC1.2 and Type-C 5 V/1.5 A standard loads. Engineers typically wire ON/OFF to a GPIO from the USB controller and tie PGOOD to enable signaling for the downstream 5 V to 3.3 V LDO. The hysteretic threshold prevents chattering if the upstream rail droops during plug-in events.
おすすめ
Battery-Powered Industrial Sensor Modules
Industrial sensor modules powered from a 1S Li-ion pack or 2S LiFePO4 stack use the TPS27082L to gate entire subcircuits during deep-sleep, dropping quiescent leakage to the part's OFF-state leakage specification. Its 1.2 V minimum VIN supports 3.0 V nominal Li-ion and 3.6 V nominal LiFePO4 chemistries, while the 8 V maximum allows use on fully charged 2S Li-ion packs (~8.4 V) when properly derated. The PGOOD output can drive an MCU interrupt to wake the system only when the load has fully ramped, avoiding false-start conditions on cold-start events with depleted batteries.
おすすめ
Multi-Rail Sequencing for Industrial PCs
Industrial PCs and edge-compute boards must sequence 3.3 V, 5 V, and 1.8 V rails in a strict order to avoid latch-up in processors, FPGAs, and DDR memories. The TPS27082L provides a configurable daisy-chain of high-side switches whose R1/C1 networks tune each rail's rise time independently, and whose PGOOD outputs can be wire-ANDed to enable the next stage in the sequence. The 3 A per-stage rating covers most peripheral rails, while engineers wire heavier 5-10 A rails to multi-parallel TPS27082Ls or larger TI power-path parts.
おすすめ
Hot-Swap / Plug-In Card Power Gating
CompactPCI, PC/104, and proprietary plug-in cards benefit from the TPS27082L as a front-end load switch that limits inrush and provides transient isolation when the card is hot-swapped into a live backplane. Its adjustable rise time via R1/C1 caps the di/dt seen at the backplane bulk caps, while the fast transient OFF-state isolation prevents backplane glitches from propagating onto the downstream card circuits. The PGOOD signal flags to on-board MCUs that the card has fully powered up, enabling a controlled bring-up of downstream regulators.
おすすめ
Consumer Audio Accessory Power Switching
Portable speakers, headphone amplifiers, and Bluetooth audio accessories use the TPS27082L to gate the battery supply to the audio amplifier section, avoiding quiescent drain when the device is in standby but preserving fast wake-up time when audio playback starts. Its 44 mΩ on-resistance adds negligible series resistance in the audio path, preserving amplifier efficiency at high output power, and its low OFF-state leakage preserves battery life in shipping-mode storage. A GPIO from the audio DSP drives ON/OFF; PGOOD signals ready state to the DSP before pulse-density modulation begins.
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: TPS27082L — 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 | TPS27081ADDCR | TPS22918CDBVR | TPS22902YZFR | TPS22920YZFR | NCP45525IMNGEVG |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Package | TSOT-23-6 (DDC) | TSOT-23-6 (DDC) | SOT-23-5 (DBV) | DSBGA-4 (YZF) | DSBGA-4 (YZF) | DFN-8 (MN) |
| Input Voltage Range | 1.2 V to 8 V | 1.2 V to 8 V | 1.0 V to 5.5 V | 1.0 V to 5.5 V | 0.85 V to 5.5 V | 0.5 V to 5.5 V |
| Continuous Load Current | 3 A | 3 A | 2 A | 2 A | 4 A | 3 A |
| Adjustable Rise Time | Yes (R1/C1 external) | Yes | Yes (CT pin) | Fixed | Yes | Yes |
| Power Good (PGOOD) Output | Yes (open-drain) | Yes | No | No | No | Yes |
| Lifecycle Status | NRND | Active | Active | Active | Active | Active |
主な差別化要因
- True P-channel high-side topology with no need for higher-voltage bias rail （vs TPS22918CDBVR)
- Programmable rise time via external R1/C1 （vs TPS22902YZFR)
- Higher continuous current rating (3 A) than most same-package alternatives （vs TPS22918CDBVR)
設計ノート
Place the R1/C1 timing network as close as possible to the TIMER pin (pin 6) and GND. Use a 0 Ω resistor instead of R1 in series to leave a 0 ohm-default fastest turn-on option; populate R1 only if a slower rise time is desired. Keep the high-current VIN and VOUT traces wide (>=20 mil per 1 A per IPC-2221) and place a 1 μF ceramic bypass cap on VIN within 1 mm of the package pin to suppress switching transients coupled through the internal PFET capacitance.
Estimated: at continuous 3 A load and VIN-VOUT = 0.13 V (worst case at low VIN), power dissipation is ~0.39 W. With TSOT-23-6 θJA ≈ 90 °C/W on a 1 sq. inch 1 oz copper pour, junction rise above ambient is ~35 °C. At higher headroom like VIN-VOUT = 0.6 V, dissipation is ~1.8 W and junction rise is ~162 °C, exceeding the 125 °C maximum - derate current above 5 V VIN or implement airflow.
Do not leave the ON/OFF pin floating - per the TI datasheet, an undefined logic level can cause indeterminate ON/OFF state and excessive quiescent current. Tie ON/OFF to VIN through a 100 kΩ pull-up if driven from a high-impedance source. The PGOOD pin is open-drain and requires an external pull-up resistor (10 kΩ to 100 kΩ) to a valid logic rail, otherwise the rail-valid signal will never assert. According to TI E2E forums, the part is NRND and new designs should consider TPS22810 family.
コンプライアンス情報
RoHS-compliant and lead-free per TI product page. Halogen-free status not explicitly stated in retrieved datasheet material and is marked unknown. Not AEC-Q100 qualified - not intended for automotive applications. Conflict minerals compliance typical of TI semiconductor products.
