TPS715-Q1 - 50mA, 24V, 3.2uA IQ LDO | Texas Instruments
Référence : TPS715-Q1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour TPS715-Q1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
TPS71501QDCKRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TPS715
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TPS7E71
⚡ Même boîtier📋 Alternative de référence (hors catalogue)
TPS175
⚡ Même boîtier📋 Alternative de référence (hors catalogue)
NCP703
⚡ Même boîtier ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
TPS715-Q1 Valeurs maximales et caractéristiques électriques
| Output Current | 50 mA |
| Maximum Input Voltage | 24 V |
| Courant de repos | 3.2 uA (typ) |
| Type de sortie | Fixed and Adjustable versions |
| Boîtier | SC-70 (DCK), 5-pin, 2.00 mm x 1.25 mm |
| Démarrage progressif | Internal (limits inrush current) |
| Protection contre les surintensités | Yes (built-in current limit) |
| Automotive Qualification | AEC-Q100 (Q1) |
| Type de montage | Surface Mount |
| Typical Applications | Battery-powered, low-power microcontroller power management |
| Package Family | SC-70 / SOT-353 surface mount |
Configuration des broches de TPS715-Q1
| Broche 1 | IN — Input supply voltage (up to 24 V) |
| Broche 2 | GND — Ground |
| Broche 3 | EN — Enable input for regulator on/off control |
| Broche 4 | FB — Feedback pin (adjustable version); NC on fixed-output versions |
| Broche 5 | OUT — Regulated output voltage |
Applications typiques
TPS715-Q1 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour TPS715-Q1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
