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Texas Instruments TPS73615MDBVREP
- Part No.:
- TPS73615MDBVREP
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS73615MDBVREP.pdf
- Description:
- IC REG LINEAR 1.5V 400MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
TPS73615MDBVREP from Texas Instruments is a radiation-hardened, extended-temperature (-55°C to +125°C) low-dropout linear regulator with NMOS pass element, delivering 400mA output at fixed 1.5V with 75mV typical dropout, 0.5% initial accuracy, and stable operation without any output capacitor. It serves as a post-regulator for noise-sensitive analog circuits in space-grade power systems.
For engineers reviewing the TPS73615MDBVREP datasheet, TPS73615MDBVREP pinout, TPS73615MDBVREP application, or TPS73615MDBVREP equivalent, key selection criteria include ultra-low-noise performance (30μVRMS), reverse current protection (<15μA), shutdown current <1μA, and compatibility with harsh-environment PCB layouts requiring no output capacitance.
Technical Context
The TPS73615MDBVREP uses an NMOS pass transistor in voltage-follower topology with internal charge pump to drive the gate above VOUT, enabling ultra-low dropout and inherent reverse-current blocking. Its BiCMOS process delivers stable regulation across –55°C to +125°C with no minimum output capacitance requirement.
It integrates thermal shutdown (160°C trip, 140°C reset), foldback current limiting (400–800mA), and precision bandgap reference (1.2V nominal). The NR pin supports external noise-reduction capacitor (CNR) to reduce output noise to 8.5×VOUT μVRMS (10Hz–100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5V ±1% over line, load, and temperature - ensures stable core supply for 1.5V logic domains without external feedback. |
| Dropout Voltage | 75mV typical at 400mA - enables operation with only 1.575V input, critical for battery-powered or post-switching-supply applications. |
| Output Noise | 30μVRMS (10Hz–100kHz) with 0.1μF CNR - meets stringent requirements for powering VCOs and RF synthesizers. |
| Ground Pin Current | 400–1000μA over 10–400mA load - near-constant quiescent current simplifies thermal modeling and power budgeting. |
| Shutdown Current | <1μA max - preserves battery life in always-on aerospace subsystems during dormant cycles. |
| Input Voltage Range | 1.7V to 5.5V - supports direct connection to Li-ion cells (2.7–4.2V), 3.3V rails, or regulated 5V supplies. |
| Accuracy | ±0.5% initial, ±1% over full operating range - eliminates need for post-production calibration in precision analog signal chains. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.15mm body, surface-mount, lead-free, RoHS-compliant, qualified per MIL-PRF-38535 Class V and QML-V standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Unregulated input supply | Accepts 1.7–5.5V; requires local 0.1–1μF low-ESR ceramic capacitor for optimal PSRR and transient immunity. |
| GND (Pin 2) | Power ground reference | Single-point connection for VIN and VOUT ground planes; critical for noise isolation in mixed-signal designs. |
| EN (Pin 3) | Enable control input | Active-high TTL/CMOS-compatible; drives low (<0.5V) to reduce IQ to <1μA; can be tied to IN if unused. |
| NR (Pin 4) | Noise reduction bypass | Connects to internal bandgap reference; 0.01–10nF CNR reduces output noise by up to 3.2× (e.g., 30 → 8.5μVRMS). |
| OUT (Pin 5) | Regulated output | Delivers 1.5V at up to 400mA; stable with zero, 1μF, or 10μF output capacitance - eliminates capacitor footprint and BOM cost. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates with zero output capacitance while maintaining >60° phase margin - removes ESR sensitivity and capacitor aging concerns in long-life missions. |
| Reverse current protection | Blocks leakage current ≤15μA when VOUT > VIN - prevents backfeeding in redundant power architectures and hot-swap scenarios. |
| Ultra-low noise architecture | 30μVRMS output noise (10Hz–100kHz) with optional CNR filtering - enables direct powering of PLLs, ADC references, and RF front-ends. |
| Extended temperature support | Guaranteed operation from –55°C to +125°C with full electrical specs - qualified for satellite payload, downhole, and avionics environments. |
| Thermal foldback protection | Reduces current limit to ~450mA when VOUT drops below 0.9×nominal - prevents thermal runaway during sustained short-circuit faults. |
Applications
| Spacecraft Power Distribution | High-Reliability FPGA Core Supply |
|---|---|
Use Scenario: Regulating secondary power rail for radiation-tolerant FPGAs in LEO satellites where component lifetime exceeds 15 years and thermal cycling is extreme. IC Role / Device Role / Timing Role: Primary 1.5V core LDO supplying FPGA I/O banks and configuration logic, replacing less stable switching converters near sensitive analog sections. Use Value: Eliminates need for output capacitor - avoids MLCC degradation in vacuum, reduces board area by 2.5mm², and maintains regulation during 100mA load transients with <50mV undershoot. | Use Scenario: Providing clean, low-noise 1.5V supply to Xilinx Kintex UltraScale+ FPGA core voltage domain in airborne radar processing units. IC Role / Device Role / Timing Role: Post-regulator after a 3.3V buck converter, suppressing switching ripple and ensuring jitter-free clock generation for high-speed SerDes lanes. Use Value: 30μVRMS noise and 58dB PSRR at 100Hz enable sub-100fs integrated jitter on 10Gbps transceivers without additional LC filtering. |
| Downhole Telemetry Sensor Node | Military Radio Frequency Front-End |
Use Scenario: Powering MEMS accelerometers and low-power microcontrollers in oil/gas well logging tools exposed to 125°C ambient and mechanical shock. IC Role / Device Role / Timing Role: Main system LDO delivering 1.5V to sensor interface ASIC and wake-up controller, enabled only during measurement bursts. Use Value: <1μA shutdown current extends battery life to >3 years; thermal shutdown (160°C) prevents latch-up during transient overheating events. | Use Scenario: Biasing VCOs and mixer ICs in S-band military radios deployed in desert environments with wide thermal swings. IC Role / Device Role / Timing Role: Ultra-low-noise analog supply rail decoupled from digital power domains using separate ground plane routing. Use Value: NR pin with 10nF capacitor reduces phase noise by 10dBc/Hz at 10kHz offset, directly improving receiver sensitivity by 1.2dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS73615MDCKREP | SOT-223-5 package; higher thermal mass (RθJA = 45°C/W vs 255°C/W); same electrical specs and pinout. | Better suited for high-power dissipation (>500mW) in convection-cooled enclosures; larger footprint (6.5mm × 3.5mm). | Select when thermal headroom is constrained and board space allows larger package. |
| TPS7H3301-SP | Radiation-hardened 3A LDO with 1.2V–5.5V adjustable output; 120mV dropout at 3A; different pinout and control interface. | Used where higher current or programmable output is required; not drop-in compatible due to different EN/NR/FB pin mapping. | Choose only when scaling beyond 400mA or requiring voltage flexibility; redesign required. |
Compared with TPS73615MDBVREP, TPS73615MDCKREP offers superior thermal performance in high-ambient environments but increases PCB area by 5.2×; TPS7H3301-SP provides 7.5× higher current capability but demands full schematic and layout revision due to non-compatible pinout and control architecture.
Availability
TPS73615MDBVREP is available at Aetrix Electronics and suitable for spacecraft power distribution, high-reliability FPGA core supply, downhole telemetry sensor nodes, and military radio frequency front-end designs requiring stable component supply across extended temperature and radiation environments.
Supply support for TPS73615MDBVREP 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 high-reliability components for aerospace, defense, and industrial markets.
The TPS736xx-EP product line was engineered for extended-temperature, radiation-tolerant linear regulation in mission-critical systems where capacitor-free stability, ultra-low noise, and reverse-current blocking are mandatory design requirements.
FAQ
Does TPS73615MDBVREP require an output capacitor for stability?
No, TPS73615MDBVREP is designed to be unconditionally stable with zero output capacitance due to its NMOS voltage-follower topology and advanced compensation. It maintains >60° phase margin across all load conditions and capacitor values (0–10μF), eliminating capacitor-related failure modes in long-duration space missions. Adding a 1μF ceramic capacitor reduces load transient undershoot but is never required for stability.
What is the maximum input voltage for TPS73615MDBVREP?
The absolute maximum input voltage for TPS73615MDBVREP is 6V, but the recommended operating range is 1.7V to 5.5V. Operation below 1.7V risks dropout or loss of regulation; operation above 5.5V violates the absolute maximum rating and may cause permanent damage. For 1.5V output, minimum functional input is 1.575V (VOUT + VDO), though 1.7V is specified as the lower bound to ensure margin across temperature and process variation.
How does the NR pin function in TPS73615MDBVREP?
The NR (Noise Reduction) pin in TPS73615MDBVREP connects internally to the bandgap reference node. Adding an external capacitor (CNR) from NR to GND forms a low-pass filter that attenuates reference noise. With CNR = 0.01μF, output noise drops from 30μVRMS to ~8.5μVRMS (10Hz–100kHz). CNR values from 10pF to 10nF are supported; larger values improve noise suppression but increase startup time. The NR pin has no effect on regulation accuracy or DC performance.
Can TPS73615MDBVREP be used in parallel for higher current?
No, TPS73615MDBVREP is not designed for parallel operation. Its NMOS pass element lacks built-in current-sharing circuitry, and mismatched dropout voltages between units would cause uneven current distribution and potential thermal runaway. For >400mA requirements, TI recommends using a single higher-current LDO such as TPS7H3301-SP or redesigning the power architecture with independent rails. Parallel use voids qualification and reliability guarantees.
What is the thermal shutdown behavior of TPS73615MDBVREP?
TPS73615MDBVREP activates thermal shutdown at approximately 160°C junction temperature, disabling the output until the die cools to ~140°C, at which point regulation resumes. This hysteresis prevents rapid cycling. During shutdown, ground current drops to <1μA. The device is rated for continuous operation up to +125°C ambient; exceeding this without adequate heatsinking will trigger shutdown. Thermal resistance (RθJA) is 255°C/W on low-K PCB - derate power by 3.9mW/°C above 25°C ambient.
TPS73615MDBVREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.2V @ 400mA
- Current - Output:
- 400mA
- Current - Quiescent (Iq):
- 550 µA
- Current - Supply (Max):
- 1 mA
- PSRR:
- 58dB ~ 37dB (100Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS73615MDBVREP FAQ
1.How can I place an order for TPS73615MDBVREP through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS73615MDBVREP 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 TPS73615MDBVREP reliable?
The price and inventory of TPS73615MDBVREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS73615MDBVREP is usually 5 days.
3.What payment methods are accepted for TPS73615MDBVREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS73615MDBVREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS73615MDBVREP?
TPS73615MDBVREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS73615MDBVREP 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 TPS73615MDBVREP?
For technical support, including TPS73615MDBVREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS73615MDBVREP requirements.
6.How does Aetrix verify that TPS73615MDBVREP is sourced from the original manufacturer or authorized distributors?
All TPS73615MDBVREP 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 TPS73615MDBVREP meets industry standards.
7.What is the process for return or replacement of TPS73615MDBVREP?
All TPS73615MDBVREP units undergo pre-shipment inspection (PSI). If there is an issue with TPS73615MDBVREP, 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 TPS73615MDBVREP part is unused and in its original packaging.
Return procedure for TPS73615MDBVREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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