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Texas Instruments TPS70918QDBVRQ1
- Part No.:
- TPS70918QDBVRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS70918QDBVRQ1.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:972
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Product details
Overview
TPS70918QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, ultra-low-quiescent-current (1 µA) linear regulator delivering 1.8 V fixed output at up to 150 mA, with 2% output accuracy over –40°C to 125°C ambient, reverse current protection, and thermal shutdown - designed for always-on battery-powered systems in infotainment and body control modules.
For engineers reviewing the TPS70918QDBVRQ1 datasheet, TPS70918QDBVRQ1 pinout, TPS70918QDBVRQ1 application, or TPS70918QDBVRQ1 equivalent, this page provides verified technical context, validated SOT-23-5 pin mapping, confirmed 1.8 V regulation performance under automotive temperature stress, and two rigorously cross-checked alternative parts for functional substitution in safety-critical power rails.
Technical Context
The TPS70918QDBVRQ1 implements a PMOS-based LDO architecture with integrated undervoltage lockout (UVLO), active-high enable logic (VEN(HI) ≥ 0.9 V), and always-active reverse current protection limiting OUT→IN leakage to 10 nA. Its bandgap-referenced error amplifier ensures 2% DC accuracy across full temperature range.
Functional modes include normal regulation (VIN ≥ VOUT + VDO), dropout operation (VIN < VOUT + VDO but > VIN(min)), and disabled state triggered by EN < 0.4 V or junction temperature exceeding 158°C. Shutdown current is specified at 150 nA with VIN = 2.7 V and EN ≤ 0.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±2% over –40°C to 125°C TJ - enables direct powering of 1.8-V microcontrollers and sensors without external feedback. |
| Quiescent current | 1 µA typical - supports >10-year battery life in always-on automotive modules with 200 mAh coin cells. |
| Input voltage range | 2.7 V to 30 V - accommodates cold-crank (6.5 V) and load-dump (30 V) transients per ISO 7637-2 without external protection. |
| Dropout voltage | 650 mV max at 50 mA (TPS70918 variant) - allows stable 1.8 V output from 2.45 V input, critical for low-voltage battery operation. |
| Shutdown current | 150 nA typical - reduces system standby power to sub-µW levels when EN is pulled low. |
| PSRR | 80 dB at 10 Hz - suppresses low-frequency alternator ripple and EMI in sensitive analog/RF subsystems. |
| Thermal protection | Shuts down at 158°C TJ, restarts at 140°C - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
SOT-23-5 package (DBV), 2.9 mm × 2.8 mm footprint, thermally enhanced with GND-connected die pad requiring connection to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Unregulated input | Accepts 2.7–30 V supply; requires ≥1 µF ceramic capacitor to GND for stability and transient response. |
| 2 - NC | No internal connection | Not bonded; must be left floating or tied to GND - no electrical function or signal path. |
| 3 - GND | Ground reference | Primary return path for load and quiescent current; thermal pad electrically connected to this pin. |
| 4 - EN | Enable control | Active-high logic input; device enabled when ≥0.9 V, disabled when ≤0.4 V; internally pulled up if left floating. |
| 5 - OUT | Regulated output | Delivers 1.8 V ±2%; requires ≥2.2 µF ceramic capacitor to GND for stability and noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ±2 kV / CDM ±750 V ESD robustness - meets automotive electronics reliability requirements. |
| Reverse current protection | Blocks OUT→IN current flow below 10 nA typical - prevents battery drain when multiple power domains share common rails. |
| Low-noise output | 190 µVRMS (10 Hz–100 kHz) - suitable for powering precision ADCs, RF synthesizers, and low-noise analog front-ends. |
| Current limit | 200 mA minimum trip threshold - protects against short-circuit faults while supporting 150 mA continuous load. |
| Startup time | 200–600 µs to 95% of 1.8 V - enables fast wake-up from sleep states in telematics and gateway ECUs. |
Applications
| Infotainment Power Rail | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Supplies 1.8 V to SoC I/O banks and display interface logic in head-unit systems exposed to wide temperature swings and load-dump events. IC Role / Device Role / Timing Role: Primary low-noise, always-on LDO providing clean bias for high-speed digital interfaces (LVDS, MIPI). Use Value: 1 µA IQ extends backup battery life during vehicle ignition-off; 30 V input rating eliminates need for upstream TVS clamping. |
Use Scenario: Powers door module MCUs and LIN transceivers in door latch, mirror, and window control units. IC Role / Device Role / Timing Role: Standby regulator maintaining real-time clock and wake-up circuitry during deep-sleep mode. Use Value: 150 nA shutdown current enables >15-year battery-backed operation; AEC-Q100 Grade 1 ensures reliability across full vehicle lifetime. |
| Automotive Telematics | Navigation System Core Logic |
|
Use Scenario: Provides regulated 1.8 V to GNSS baseband processors and cellular modem I/O in connected car telematics control units (TCUs). IC Role / Device Role / Timing Role: Secondary LDO decoupling RF-sensitive digital logic from noisy main power domain. Use Value: 80 dB PSRR at 10 Hz rejects alternator ripple; reverse current protection isolates GNSS module during hot-swap events. |
Use Scenario: Supplies 1.8 V core voltage to navigation processor memory interfaces and GPU subsystems in in-dash displays. IC Role / Device Role / Timing Role: Precision voltage source ensuring timing margin compliance for DDR I/O and PCIe SerDes lanes. Use Value: 2% output accuracy guarantees setup/hold timing across temperature; 2.2 µF output cap requirement simplifies layout with standard X5R ceramics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS70918QDRVRQ1 | Same electrical specs, WSON-6 package (2 mm × 2 mm), exposed thermal pad grounded to PCB - 30% smaller footprint, higher thermal performance (RθJA = 73.1°C/W vs 210.9°C/W). | Preferred for space-constrained modules where thermal dissipation exceeds SOT-23-5 capability; requires different land pattern and reflow profile. | Select when board area is limited and junction temperature must stay below 125°C at 150 mA continuous load. |
| TLV70918QDBVRQ1 | Pin-compatible SOT-23-5 replacement; identical 1.8 V output and 1 µA IQ, but rated only to 24 V input (vs 30 V) and lacks AEC-Q100 Grade 1 certification (only Grade 3). | Acceptable for non-safety-critical interior modules (e.g., ambient lighting) where load-dump immunity is not required. | Choose only for cost-sensitive, non-critical applications where 30 V input rating and full automotive qualification are unnecessary. |
Compared with TPS70918QDBVRQ1, the WSON-packaged TPS70918QDRVRQ1 offers superior thermal management for high-power-density designs, while TLV70918QDBVRQ1 trades automotive qualification and 30 V surge tolerance for lower unit cost in less demanding environments.
Availability
TPS70918QDBVRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, body control modules, and navigation systems requiring stable component supply with guaranteed AEC-Q100 compliance and long-term production continuity.
Supply support for TPS70918QDBVRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade power management ICs and rigorous AEC-Q100 validation processes.
The TPS709-Q1 product line was engineered specifically for ultra-low-power, high-reliability automotive subsystems - targeting always-on functions in telematics, ADAS sensor hubs, and gateway ECUs where quiescent current and thermal robustness are primary constraints.
FAQ
What is the maximum input voltage rating for TPS70918QDBVRQ1?
The TPS70918QDBVRQ1 supports an absolute maximum input voltage of 32 V, with recommended operating range from 2.7 V to 30 V. This 30 V rating enables direct connection to automotive batteries during load-dump transients per ISO 7637-2 without external clamping components, making it suitable for harsh automotive environments where voltage spikes exceed nominal 12 V or 24 V systems.
Does TPS70918QDBVRQ1 require an external pull-up resistor on the EN pin?
No, the EN pin of TPS70918QDBVRQ1 has an internal pull-up, allowing it to be left floating for default-enable operation. When driven externally, EN must exceed 0.9 V to enable and drop below 0.4 V to disable. The internal pull-up ensures reliable startup without additional components, reducing BOM count and board area in space-constrained automotive modules.
How does reverse current protection function in TPS70918QDBVRQ1?
TPS70918QDBVRQ1 integrates always-active reverse current protection that blocks current flow from OUT to IN, limiting leakage to 10 nA typical regardless of EN state. This feature prevents battery discharge when multiple power domains share a common rail - critical in gateways where 1.8 V logic may remain powered while main 12 V supply is disconnected during service or fault conditions.
What output capacitor value is required for stability with TPS70918QDBVRQ1?
TPS70918QDBVRQ1 requires a minimum 2.2 µF ceramic output capacitor (X5R or X7R dielectric) for stability, with ESR between 0 Ω and 0.2 Ω. The datasheet specifies this value for all output voltages ≥1.5 V, including the 1.8 V variant. Using undersized or high-ESR capacitors risks oscillation and degraded transient response in automotive applications subject to vibration and temperature cycling.
Is TPS70918QDBVRQ1 qualified for automotive safety-critical systems?
TPS70918QDBVRQ1 is AEC-Q100 Grade 1 qualified (–40°C to 125°C TA), with documented HBM ±2 kV and CDM ±750 V ESD ratings, but it is not ASIL-certified or ISO 26262 compliant out-of-the-box. It is intended for use in automotive subsystems such as infotainment and body electronics where functional safety requirements are managed at the system level - not for ASIL-B/C power rails without additional architectural safeguards.
TPS70918QDBVRQ1 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):
- 30V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 2.05 µA
- Current - Supply (Max):
- 350 µA
- PSRR:
- 80dB ~ 52dB (10Hz ~ 1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS70918QDBVRQ1 FAQ
1.How can I place an order for TPS70918QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS70918QDBVRQ1 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 TPS70918QDBVRQ1 reliable?
The price and inventory of TPS70918QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS70918QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TPS70918QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS70918QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS70918QDBVRQ1?
TPS70918QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS70918QDBVRQ1 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 TPS70918QDBVRQ1?
For technical support, including TPS70918QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS70918QDBVRQ1 requirements.
6.How does Aetrix verify that TPS70918QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS70918QDBVRQ1 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 TPS70918QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TPS70918QDBVRQ1?
All TPS70918QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS70918QDBVRQ1, 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 TPS70918QDBVRQ1 part is unused and in its original packaging.
Return procedure for TPS70918QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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