TPS715-Q1 - 50mA, 24V, 3.2uA IQ LDO | Texas Instruments
MPN: TPS715-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for TPS715-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS71501QDCKRQ1
β Drop-Inπ Reference alternative (not in catalog)
TPS715
β Drop-Inπ Reference alternative (not in catalog)
TPS7E71
β‘ Same Packageπ Reference alternative (not in catalog)
TPS175
β‘ Same Packageπ Reference alternative (not in catalog)
NCP703
β‘ Same Packageπ Reference alternative (not in catalog)
TPS715-Q1 Maximum Ratings & Electrical Characteristics
| Output Current | 50 mA |
| Maximum Input Voltage | 24 V |
| Quiescent Current | 3.2 uA (typ) |
| Output Type | Fixed and Adjustable versions |
| Package | SC-70 (DCK), 5-pin, 2.00 mm x 1.25 mm |
| Dropout Voltage | [DATA_NEEDED: dropout voltage at full load] |
| Soft-Start | Internal (limits inrush current) |
| Overcurrent Protection | Yes (built-in current limit) |
| Automotive Qualification | AEC-Q100 (Q1) |
| Operating Temperature | [DATA_NEEDED: operating temperature range] |
| Mounting Type | Surface Mount |
| Typical Applications | Battery-powered, low-power microcontroller power management |
| RoHS Status | [DATA_NEEDED: RoHS status] |
| MSL Level | [DATA_NEEDED: MSL level] |
| Package Family | SC-70 / SOT-353 surface mount |
TPS715-Q1 Pin Configuration
| Pin 1 | IN β Input supply voltage (up to 24 V) |
| Pin 2 | GND β Ground |
| Pin 3 | EN β Enable input for regulator on/off control |
| Pin 4 | FB β Feedback pin (adjustable version); NC on fixed-output versions |
| Pin 5 | OUT β Regulated output voltage |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS715-Q1 is suitable for 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for TPS715-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
| Output Current | 50 mA | 50 mA | Higher (per TI E2E forum, e.g. 80 mA requirement) | [DATA_NEEDED] |
| Quiescent Current | 3.2 uA (typ) | 3.2 uA (typ) | [DATA_NEEDED] | [DATA_NEEDED] |
| Maximum Input Voltage | 24 V | 24 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Output Type | Fixed and Adjustable | Adjustable | [DATA_NEEDED] | [DATA_NEEDED] |
| Automotive Qualification | AEC-Q100 (Q1) | AEC-Q100 (Q1) | [DATA_NEEDED] | [DATA_NEEDED] |
| Protection Features | Internal soft-start, overcurrent limit | Internal soft-start, overcurrent limit | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- 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)
Design Notes
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.
Compliance Information
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.
