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Texas Instruments TPS71501QDCKRM3Q1
- Part No.:
- TPS71501QDCKRM3Q1
- Manufacturer:
- Texas Instruments
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TPS71501QDCKRM3Q1.pdf
- Description:
- AUTOMOTIVE, 50MA 24V ULTRA-LOW-I
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
TPS71501QDCKRM3Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified adjustable low-dropout linear regulator delivering up to 50 mA output current with 3.2 μA typical quiescent current, 415 mV typical dropout at 50 mA, and stable operation with ≥0.47 μF output capacitance - used in battery-powered microcontroller power rails for hybrid powertrain control modules.
For engineers reviewing the TPS71501QDCKRM3Q1 datasheet, TPS71501QDCKRM3Q1 pinout, TPS71501QDCKRM3Q1 application, or TPS71501QDCKRM3Q1 equivalent, key selection criteria include ultra-low IQ across full load range (0–50 mA), wide 2.5 V to 24 V input voltage support, adjustable 1.205 V to 15 V output capability, SC70-5 thermal performance (RθJB = 40.7°C/W), and automotive-grade ESD robustness (HBM ±3000 V, CDM ±1500 V).
Technical Context
The TPS71501QDCKRM3Q1 implements a CMOS-based LDO architecture with internal bandgap reference (1.205 V), leakage-null control circuit active below 5 μA load, and brick-wall overcurrent protection limiting output to 125–350 mA depending on VIN and chip version. It operates in normal regulation when VIN > VOUT + VDO and enters dropout mode when VIN falls below that threshold, causing output to track input with degraded transient response.
Its functional block includes feedback (FB) input for external resistor divider programming, GND and IN/OUT terminals, two NC pins (1 and 3) for thermal optimization, and internal soft-start to limit inrush current during power-up. The device supports both fixed and adjustable variants within the same SC70-5 package footprint but uses distinct pinouts - this part is the adjustable version with FB on Pin 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 50 mA - sufficient for powering low-power MCUs (e.g., MSP430), sensors, and CAN transceivers without external boost. |
| Quiescent Current | 3.2 μA typical across 0–50 mA load - enables >10-year battery life in always-on automotive modules. |
| Dropout Voltage | 415 mV typical at 50 mA - allows regulation from 3.3 V output with as low as 3.715 V input, critical for Li-ion and 12 V system brownout resilience. |
| Input Voltage Range | 2.5 V to 24 V - accommodates cold-crank (6.5 V), load-dump (24 V), and dual-battery (24 V) automotive transients without external protection. |
| Output Voltage Range | 1.205 V to 15 V via external R1/R2 divider - supports custom logic supply rails (1.8 V, 2.8 V, 5.0 V) and analog subsystems (up to 12 V). |
| Stability Capacitance | ≥0.47 μF ceramic output capacitor - eliminates need for large electrolytics; compatible with 0402/0603 MLCCs for space-constrained PCBs. |
| ESD Rating | HBM ±3000 V, CDM ±1500 V (new chip) - exceeds AEC-Q100-002/-011 requirements for under-hood electronics reliability. |
Pinout & Package
TPS71501QDCKRM3Q1 is housed in a 2.00 mm × 1.25 mm, 5-pin SC70 (DCK) package optimized for thermal performance on standard FR-4 PCBs (RθJB = 40.7°C/W). Pins 1 and 3 are no-connect (NC); grounding them improves thermal dissipation without electrical impact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | Connects to resistor divider midpoint; sets output voltage per VOUT = 1.205 V × (1 + R1/R2); high-impedance node requiring low-leakage resistors. |
| Pin 2 (GND) | Ground reference | Primary return path for regulator bias and load current; must be low-inductance connection to minimize noise and instability. |
| Pin 3 (NC) | No-connect terminal | Internally unconnected; recommended to tie to GND plane for improved thermal conduction and mechanical stability. |
| Pin 4 (IN) | Input supply | Accepts 2.5–24 V DC; requires local 0.1 μF ceramic decoupling close to pin to suppress high-frequency ringing from source impedance. |
| Pin 5 (OUT) | Regulated output | Delivers stable output; requires ≥0.47 μF X7R/X5R ceramic capacitor with ≤100 mΩ ESR placed adjacent to pin for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for engine bay, transmission control, and ADAS sensor modules. |
| Internal soft-start | Controls output ramp rate during power-up to limit inrush into downstream capacitors and prevent supply rail collapse. |
| Brick-wall overcurrent protection | Clamps output at 125–350 mA (depending on VIN and chip revision) - protects against short-circuit faults without latch-off. |
| Low-noise regulation | 425 μVRMS integrated noise (200 Hz–100 kHz) - preserves signal integrity in precision ADC references and RF bias supplies. |
| Wide-input compatibility | Operates from 2.5 V (single-cell LiFePO₄) to 24 V (dual-battery systems) - eliminates need for pre-regulators in multi-rail automotive designs. |
Applications
| Engine Control Unit (ECU) Sensor Bias | ADAS Camera Module Power |
|---|---|
Use Scenario: Providing stable 3.3 V bias to MEMS pressure sensors and Hall-effect crankshaft position sensors in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Primary LDO supplying analog front-end and signal conditioning circuitry; maintains regulation during cold-crank (6.5 V) and load-dump (24 V) events. Use Value: 3.2 μA IQ extends battery backup runtime during key-off monitoring; 415 mV dropout ensures uninterrupted sensing down to 3.715 V input. |
Use Scenario: Generating 1.8 V core supply for image signal processors (ISPs) and 2.8 V I/O supply for CMOS image sensors in forward-facing ADAS cameras. IC Role / Device Role / Timing Role: Adjustable dual-rail LDO configured via precision resistors; delivers clean, low-noise power independent of main 12 V bus ripple. Use Value: 425 μVRMS noise floor prevents image artifacts; SC70-5 footprint enables compact placement near sensor die for minimal trace inductance. |
| Infotainment Head Unit MCU Core | Electric Power Steering (EPS) Motor Controller Logic |
Use Scenario: Powering ARM Cortex-M7 application processor cores and DDR memory I/O in automotive infotainment head units. IC Role / Device Role / Timing Role: Secondary LDO stepping down from 5 V intermediate rail to 1.2 V/1.8 V processor domains; handles dynamic load transients during UI rendering. Use Value: 0.47 μF stability margin allows use of tiny 0402 MLCCs; 50 mA rating supports burst-mode CPU activity without dropout. |
Use Scenario: Supplying isolated 5 V logic rails for gate drivers, CAN transceivers, and position feedback ICs in EPS motor control boards. IC Role / Device Role / Timing Role: Fault-tolerant LDO with overcurrent protection feeding safety-critical communication and monitoring circuits. Use Value: Brick-wall current limit (350 mA) prevents thermal runaway during MOSFET shoot-through faults; AEC-Q100 qualification ensures ASIL-B compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A1633QDGNRQ1 | Fixed 3.3 V output only; 17 μA IQ; 200 mA output; 250 mV dropout at 200 mA | Not adjustable; higher IQ; higher current capacity - suited for fixed-rail, higher-load applications where programmability is unnecessary | Select when 3.3 V is sufficient and >50 mA load current is required; not a drop-in replacement due to fixed output and different pinout |
| NCP1117ST50T3G | Fixed 5.0 V output; 6 mA IQ; 1 A output; TO-220/SOT-223 packages; no AEC-Q100 qualification | Lacks automotive qualification, much higher IQ, incompatible thermal profile - limited to non-safety-critical industrial use | Consider only for cost-sensitive, non-automotive prototypes; cannot replace TPS71501QDCKRM3Q1 in production automotive designs |
Compared with TPS71501QDCKRM3Q1, TPS7A1633QDGNRQ1 offers higher output current but forfeits adjustability and ultra-low IQ, while NCP1117ST50T3G lacks automotive qualification and consumes ~1875× more quiescent current - making the TPS71501QDCKRM3Q1 uniquely suited for battery-sensitive, programmable, AEC-Q100-compliant applications.
Availability
TPS71501QDCKRM3Q1 is available at Aetrix Electronics and suitable for hybrid powertrain control, ADAS camera modules, infotainment head units, and electric power steering systems requiring stable component supply with guaranteed automotive lifecycle support.
Supply support for TPS71501QDCKRM3Q1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management solutions, with decades of automotive qualification expertise and broad manufacturing scale.
The TPS715-Q1 product line was designed specifically for AEC-Q100 Grade 1 automotive applications demanding ultra-low quiescent current, wide-input voltage tolerance, and small-footprint packaging - targeting battery-backed control modules and distributed sensor nodes.
FAQ
What is the maximum input voltage supported by the TPS71501QDCKRM3Q1?
The TPS71501QDCKRM3Q1 supports up to 24 V input voltage for legacy chips and up to 30 V for new M3 chips (as specified in Absolute Maximum Ratings). For reliable operation across temperature and lifetime, the Recommended Operating Conditions specify 2.5 V to 24 V - making it suitable for 12 V and 24 V automotive systems including load-dump conditions. Always verify VIN derating margins in thermal design.
How do I configure the output voltage of the TPS71501QDCKRM3Q1?
The TPS71501QDCKRM3Q1 is an adjustable LDO requiring an external resistor divider between OUT, FB, and GND. Output voltage follows VOUT = 1.205 V × (1 + R1/R2), where R1 connects OUT to FB and R2 connects FB to GND. TI recommends ~1.5 μA divider current - e.g., R2 = 806 kΩ and R1 = 499 kΩ yields 3.3 V. Avoid high-value resistors (>10 MΩ) due to FB pin leakage effects.
Does the TPS71501QDCKRM3Q1 require an input capacitor?
The TPS71501QDCKRM3Q1 does not require an input capacitor for stability, but TI recommends a 0.047 μF ceramic capacitor placed close to the IN pin to suppress high-frequency ringing caused by source inductance - especially critical during load transients in automotive wiring harnesses. This improves system-level immunity without affecting LDO loop dynamics.
What is the thermal resistance of the TPS71501QDCKRM3Q1 in its SC70-5 package?
The TPS71501QDCKRM3Q1 (new chip) has a junction-to-board thermal resistance (RθJB) of 40.7°C/W on standard 2s2p JEDEC test board. With proper copper pour and thermal vias under the exposed pad (Pins 1 and 3 grounded), actual RθJB can improve by 35–55%. This enables continuous 50 mA operation at +125°C ambient when PCB layout follows TI's thermal guidelines.
Is the TPS71501QDCKRM3Q1 pin-compatible with other TPS715-Q1 variants?
No - the TPS71501QDCKRM3Q1 (adjustable version) uses Pin 1 as FB, whereas fixed-output TPS715xx-Q1 variants use Pin 1 as NC. Though both share the SC70-5 (DCK) package, their pin functions differ. Interchanging them without PCB redesign will cause malfunction: connecting FB to NC leaves regulation open-loop, and connecting NC to FB creates undefined behavior. Always verify pin configuration per datasheet Figure 5-1 vs Figure 5-2.
TPS71501QDCKRM3Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 15V
- Voltage Dropout (Max):
- 0.75V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 5.8 mA
- Current - Supply (Max):
- 5.8 mA
- PSRR:
- 60dB (100kHz)
- Control Features:
- -
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TPS71501QDCKRM3Q1 FAQ
1.How can I place an order for TPS71501QDCKRM3Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS71501QDCKRM3Q1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS71501QDCKRM3Q1 reliable?
The price and inventory of TPS71501QDCKRM3Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS71501QDCKRM3Q1 is usually 5 days.
3.What payment methods are accepted for TPS71501QDCKRM3Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS71501QDCKRM3Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS71501QDCKRM3Q1?
TPS71501QDCKRM3Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS71501QDCKRM3Q1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS71501QDCKRM3Q1?
For technical support, including TPS71501QDCKRM3Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS71501QDCKRM3Q1 requirements.
6.How does Aetrix verify that TPS71501QDCKRM3Q1 is sourced from the original manufacturer or authorized distributors?
All TPS71501QDCKRM3Q1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS71501QDCKRM3Q1 meets industry standards.
7.What is the process for return or replacement of TPS71501QDCKRM3Q1?
All TPS71501QDCKRM3Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS71501QDCKRM3Q1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS71501QDCKRM3Q1 part is unused and in its original packaging.
Return procedure for TPS71501QDCKRM3Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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