TPS715-Q1 - 50mA, 24V, 3.2uA IQ LDO | Texas Instruments
部品番号: TPS715-Q1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.15 | $1.15 |
| 10 | $1.03 | $10.30 |
| 100 | $0.82 | $82.00 |
| 500 | $0.68 | $340.00 |
| 1,000 | $0.55 | $550.00 |
TPS715-Q1 概要
An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage is only slightly above the output. Within the power-management IC hierarchy, the TPS715-Q1 sits at the point-of-load regulation stage, converting higher-voltage battery or automotive rails into clean, low-noise supplies for microcontrollers, sensors, and analog circuitry.
Key features include the 3.2 uA quiescent current that dramatically extends battery life in always-on systems, a wide input range supporting 24 V industrial and 12 V automotive rails, an internal soft-start that limits inrush current during startup, and a built-in overcurrent limit that protects the device during load shorts or fault conditions. The low dropout voltage allows efficient operation from already-regulated or heavily loaded supplies.
Architecturally, the TPS715-Q1 uses a precision bandgap reference and an error amplifier driving a PMOS pass element, with the internal soft-start ramping the output to avoid excessive inrush when powering capacitive loads. Its micropower bias design keeps ground current essentially flat from no-load to full 50 mA load, simplifying power budget calculations for sleep and standby modes.
Typical applications include battery-powered portable instrumentation, always-on wake-up and keep-alive supplies for automotive modules, and power-management attachments to low-power microcontrollers such as the MSP430 and C2000 families, where every microamp of quiescent current affects system lifetime.
Design consideration: at only 50 mA maximum output, size the external output capacitor per datasheet stability requirements and account for thermal headroom at 24 V input, where dissipation at full load approaches 1 W - verify junction temperature in the tiny SC-70 footprint.
ドロップイン代替品: TPS715-Q1 — 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:
TPS71501QDCKRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS715
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS7E71
⚡ 同一パッケージ📋 参考代替品（カタログ未掲載）
TPS175
⚡ 同一パッケージ📋 参考代替品（カタログ未掲載）
NCP703
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS715-Q1 最大定格＆電気的特性
| Output Current | 50 mA |
| Maximum Input Voltage | 24 V |
| 静止電流 | 3.2 uA (typ) |
| 出力タイプ | Fixed and Adjustable versions |
| パッケージ | SC-70 (DCK), 5-pin, 2.00 mm x 1.25 mm |
| ソフトスタート | Internal (limits inrush current) |
| 過電流保護 | Yes (built-in current limit) |
| Automotive Qualification | AEC-Q100 (Q1) |
| 実装タイプ | Surface Mount |
| Typical Applications | Battery-powered, low-power microcontroller power management |
| Package Family | SC-70 / SOT-353 surface mount |
TPS715-Q1 ピン構成
| ピン 1 | IN — Input supply voltage (up to 24 V) |
| ピン 2 | GND — Ground |
| ピン 3 | EN — Enable input for regulator on/off control |
| ピン 4 | FB — Feedback pin (adjustable version); NC on fixed-output versions |
| ピン 5 | OUT — Regulated output voltage |
主な用途
TPS715-Q1 の用途: 6 件s: Battery-Powered Portable Devices, Automotive Keep-Alive and Wake-Up Supplies, Low-Power Microcontroller Power Management, Industrial 24 V Rail Point-of-Load Regulation, Automotive Sensor and CAN Node Auxiliary Rails, Instrumentation and Metering Standby Power.
Battery-Powered Portable Devices
The TPS715-Q1's 3.2 uA quiescent current is the defining parameter for battery-powered applications: in a 2000 mAh cell, 3.2 uA of standby drain consumes under 1% of capacity per year, versus tens of microamps for conventional LDOs. Placed as the always-on rail feeding a microcontroller sleep domain, the device regulates up to 24 V input down to system voltages while the internal soft-start limits inrush when the battery first connects. The 50 mA output comfortably covers MCU run-mode and sensor loads.
おすすめ
Automotive Keep-Alive and Wake-Up Supplies
In automotive ECUs, the TPS715-Q1 serves as a key-off keep-alive regulator, powering wake-up logic from the 12 V battery rail while the main power tree is shut down. Its 24 V input rating handles load-dump-adjacent conditions with upstream protection, and AEC-Q100 qualification meets OEM sourcing requirements. At 3.2 uA quiescent draw, the module's contribution to vehicle parasitic drain stays negligible, extending battery life during long parking periods in fleets and vehicles with high standby electronics content.
おすすめ
Low-Power Microcontroller Power Management
TI positions the TPS715-Q1 explicitly as a power-management attachment to low-power microcontrollers. Its flat 3.2 uA ground current simplifies power budgeting because sleep and run mode efficiency calculations do not depend on load, and the 50 mA capability covers MSP430, MSPM0, and similar MCU families directly. The SC-70 (DCK) footprint of 2.00 mm x 1.25 mm lets designers place the regulator close to the MCU power pin on dense boards, minimizing trace impedance and improving transient response with minimal output capacitance.
おすすめ
Industrial 24 V Rail Point-of-Load Regulation
The 24 V maximum input lets the TPS715-Q1 regulate directly from industrial 24 V control panels to power low-current analog front ends and status indicators. Where dissipation permits (50 mA x dropout), this eliminates a switching stage for noise-sensitive sensor supplies. The built-in overcurrent limit protects against wiring faults common in field installations, and the small SC-70 package fits on dense I/O module PCBs. Designers should verify junction temperature at high input-to-output differential with derating per the TI datasheet thermal information.
おすすめ
Automotive Sensor and CAN Node Auxiliary Rails
Automotive sensor nodes and CAN/LIN peripherals need a clean, always-available auxiliary supply independent of the main power tree. The TPS715-Q1 provides this rail with AEC-Q100 qualification and enough headroom (24 V input) for transients clamped by upstream protection. Its low noise linear topology avoids the switching artifacts that degrade analog sensor accuracy, and the internal soft-start prevents inrush glitches on the node's local supply when the module powers up alongside the CAN network.
おすすめ
Instrumentation and Metering Standby Power
Utility meters and battery-powered instrumentation benefit from the TPS715-Q1's ultra-low standby drain during idle periods between measurement bursts. The 3.2 uA quiescent current means the regulator itself consumes a fraction of the budget allocated to the real-time clock and supervisor circuits. Fixed and adjustable output options allow one footprint to serve multiple product voltage rails, and the overcurrent limit protects the meter electronics during field fault events, improving long-term reliability in unattended installations.
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: TPS715-Q1 — 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 | TPS71501QDCKRQ1 | TPS7E71 | NCP703 |
|---|---|---|---|---|
| Package | SC-70 (DCK) 2.00 mm x 1.25 mm | SC-70 (DCK) - same | SC-70 (DCK) - same | SC-70-5 (SOT-353) - same footprint family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
主な差別化要因
- Ultra-low 3.2 uA quiescent current across full load range （vs NCP703)
- AEC-Q100 automotive qualification （vs TPS715 (non-Q1))
- Higher-current upgrade path in same footprint （vs TPS7E71)
設計ノート
At 24 V input and high output voltages near the dropout limit, dissipation at 50 mA load can approach 1 W in the tiny SC-70 (DCK) package. Calculate Pd = (VIN - VOUT) x IOUT and verify junction temperature against the datasheet thermal resistance. For 24 V-to-3.3 V conversions at full load, use a switching pre-regulator (e.g., TPS62840QDLCRQ1) or derate the load; reserve the TPS715-Q1 for low-current always-on rails in wide-VIN cases.
Place the input and output ceramic capacitors within 2 mm of the IN and OUT pins, per the TI TPS715-Q1 datasheet layout recommendations. Use the value and ESR range specified in the stability section - ultra-low-Iq LDOs are sensitive to output capacitor ESR, and an out-of-spec capacitor can cause oscillation that is difficult to diagnose on a finished board. The FB divider (adjustable version) should use high-value resistors (hundreds of kOhms) to preserve the 3.2 uA quiescent current advantage.
The internal soft-start limits inrush, but the EN pin must not be left floating - tie it to IN for always-on operation or drive it from a logic signal for power sequencing. Do not rely on the overcurrent limit as a constant-current regulator; it is a fault-protection feature, not a precision current source. When substituting the non-Q1 TPS715 in automotive designs, remember it lacks AEC-Q100 qualification even though it is electrically and mechanically drop-in compatible.
コンプライアンス情報
AEC-Q100 qualification confirmed by the Q1 designation in TI product data. RoHS/REACH/lead-free status not stated in retrieved web data - verify on the TI product page.
