My Inquiry
My Account
Texas Instruments TPS7B8125QDGNRQ1
- Part No.:
- TPS7B8125QDGNRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
TPS7B8125QDGNRQ1.pdf
- Description:
- IC REG LIN 2.5V 150MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:12,473
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS7B8125QDGNRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO regulator delivering 150mA output at fixed 2.5V with 1.5% accuracy, 3µA typical quiescent current at light load, and 540mV max dropout at 150mA - designed for always-on battery-connected systems such as CAN/LIN transceivers and BMS controllers.
For engineers reviewing the TPS7B8125QDGNRQ1 datasheet, TPS7B8125QDGNRQ1 pinout, TPS7B8125QDGNRQ1 application, or TPS7B8125QDGNRQ1 equivalent, key selection criteria include ultra-low IQ over –40°C to +125°C ambient, 3V–40V input range with 45V transient tolerance, integrated thermal/overcurrent protection, and HVSSOP-8 package compatibility with high-reliability automotive PCB layouts.
Technical Context
The TPS7B8125QDGNRQ1 implements a high-voltage-tolerant enable input (VIH = 2V, VIL = 0.7V) and undervoltage lockout (UVLO = 2.7V with 200mV hysteresis), ensuring robust startup and fault recovery in automotive battery rails. Its internal bandgap reference and error amplifier maintain regulation across wide temperature and line/load variations.
It operates in three functional modes: normal regulation (VIN ≥ VOUT + VDROP), dropout mode (3V ≤ VIN < VOUT + VDROP), and disabled mode (EN low or VIN < UVLO). Thermal shutdown activates at TJ = 175°C with 20°C hysteresis, and short-circuit current limit ranges from 180mA to 690mA depending on output voltage and package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% over line, load, and –40°C to +125°C ambient - ensures stable MCU core or sensor biasing without external feedback. |
| Quiescent Current | 2.7µA typical at light load (IOUT = 0.2mA); 300nA in shutdown - enables >10-year battery standby in always-on vehicle modules. |
| Input Voltage Range | 3V to 40V continuous, with 45V/200ms transient tolerance - supports direct connection to 12V/24V automotive batteries including cold-crank and load-dump events. |
| Max Output Current | 150mA continuous - sufficient to power dual CAN transceivers, LIN nodes, or low-power microcontrollers with margin. |
| Dropout Voltage | ≤540mV at 150mA (DGN package, 5V option); 650mV at 150mA (3.3V option); not specified for 2.5V due to min-VIN constraint - defines minimum headroom needed for regulation. |
| Thermal Resistance | RθJA = 63.9°C/W (DGN package) - requires ≥2 cm² copper pour with thermal vias to sustain 150mA at TA = 125°C. |
| Protection Features | Integrated thermal shutdown (175°C trip), overcurrent limit (180–690mA), and UVLO - eliminates need for external fault management circuitry. |
Pinout & Package
TPS7B8125QDGNRQ1 uses the DGN (8-pin HVSSOP) package: 3mm × 3mm body with exposed thermal pad, RθJA = 63.9°C/W. The thermal pad must be soldered to a GND plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Unregulated input supply | Accepts 3V–40V; requires ≥1µF ceramic capacitor to GND near pin for stability and transient response. |
| 2 EN | Enable control input | Active-high logic; VIH ≥ 2V enables regulation, VIL ≤ 0.7V forces shutdown; draws only 10nA. |
| 3 NC | No-connect | Not internally bonded; must be left floating or tied to GND - no electrical function. |
| 4 GND | Ground reference | Main signal ground return; connects to thermal pad - critical for EMI and thermal performance. |
| 5 GND | Ground reference | Second dedicated GND pin reduces ground impedance and improves PSRR under dynamic load. |
| 6 GND | Ground reference | Third GND pin enhances current-handling capability and minimizes ground bounce during load transients. |
| 7 NC | No-connect | Not internally connected; no routing or termination required. |
| 8 OUT | Regulated output | Delivers stable 2.5V; requires 1–200µF ceramic capacitor (ESR 0.001–5Ω) to GND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient and –40°C to +150°C junction - meets automotive reliability requirements without derating. |
| Ultra-low quiescent current | 2.7µA typical at light load (vs. 300nA in shutdown) - enables multi-year battery life in telematics and alarm systems. |
| Stable with low-ESR ceramics | Supports 1–200µF X5R/X7R capacitors (0.001–5Ω ESR) - eliminates need for costly tantalum or polymer caps. |
| Integrated fault protection | Auto-recovering thermal shutdown and foldback current limit - prevents latch-up during shorts or overload without external circuitry. |
| Functional Safety-Capable documentation | TI provides FIT data, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system certification. |
Applications
| Automotive Headlights | Battery Management Systems (BMS) |
|---|---|
Use Scenario: Powering LED driver ICs and CAN communication interfaces in adaptive front-lighting systems (AFS) that remain active during vehicle sleep mode. IC Role / Device Role / Timing Role: Primary 2.5V bias rail for analog front-end sensors and CAN transceivers, enabling wake-on-LIN functionality. Use Value: 3µA IQ prevents parasitic drain that would otherwise deplete 12V battery within weeks during parked operation. | Use Scenario: Supplying voltage references and ADC bias for cell monitoring units in high-voltage EV battery packs. IC Role / Device Role / Timing Role: Precision 2.5V reference source for 16-bit SAR ADCs measuring cell voltages with <±1.5mV error. Use Value: 1.5% output accuracy over temperature ensures consistent cell voltage readings across –40°C to +85°C pack environments. |
| Inverter Control Units | Automotive Head Units |
Use Scenario: Providing isolated 2.5V supply to gate driver bias circuits and current-sense amplifiers in traction inverter control boards. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from noisy 12V main bus, reducing noise coupling into sensitive analog sensing paths. Use Value: 60dB PSRR at 100Hz suppresses ripple from DC-DC converters powering IGBT gate drivers. | Use Scenario: Powering audio DSP cores and touch controller interfaces in infotainment head units requiring low-noise, always-on standby power. IC Role / Device Role / Timing Role: Standby LDO supplying real-time clock (RTC) and wake-up interrupt logic while main SoC is powered down. Use Value: 300nA shutdown current enables >15-year RTC battery backup using a single CR2032 coin cell. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B8133QDGNRQ1 | Identical architecture and package, but fixed 3.3V output; 650mV max dropout at 150mA. | Suitable for 3.3V MCU or transceiver rails; not interchangeable for 2.5V precision analog circuits. | Select when system requires 3.3V instead of 2.5V - same footprint, thermal, and enable behavior. |
| TLV73325PQDBVRQ1 | Lower IQ (250nA typ), lower current (300mA), but narrower 1.7V–5.5V input range and no 45V transient rating. | Limited to post-regulated 3.3V/5V domains; unsuitable for direct battery connection or load-dump immunity. | Choose for secondary low-IQ rails where input is already pre-regulated and transient stress is absent. |
Compared with TPS7B8133QDGNRQ1, the TPS7B8125QDGNRQ1 provides tighter voltage matching for 2.5V ADC references; versus TLV73325PQDBVRQ1, it delivers superior input ruggedness and automotive-grade thermal margin at the cost of slightly higher IQ.
Availability
TPS7B8125QDGNRQ1 is available at Aetrix Electronics and suitable for automotive headlight control, battery management systems, inverter control units, and infotainment head units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TPS7B8125QDGNRQ1 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, industrial, and power management solutions.
The TPS7B81-Q1 product line delivers ultra-low-IQ LDOs for automotive always-on systems, targeting battery-connected applications where energy efficiency, thermal resilience, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum input voltage the TPS7B8125QDGNRQ1 can withstand?
The TPS7B8125QDGNRQ1 supports 3V to 40V continuous input voltage and can withstand up to 45V for 200ms during automotive load-dump transients. This rating is validated per AEC-Q100 stress testing and allows direct connection to 12V and 24V battery rails without external clamping circuitry. Exceeding 45V even briefly may cause permanent damage, and operation below 3V is prohibited by the UVLO threshold of 2.7V.
Does the TPS7B8125QDGNRQ1 require an input capacitor?
The TPS7B8125QDGNRQ1 does not require an input capacitor for stability, but TI strongly recommends a ≥1µF ceramic capacitor placed close to the IN pin to improve transient response and reduce input impedance during load steps. Without it, line transients may propagate to the output, especially under fast-rising load conditions. The capacitor should be X5R or X7R dielectric with low ESR, and mounted with minimal trace length to maximize effectiveness.
Can the TPS7B8125QDGNRQ1 be used with a 2.5V output in dropout mode?
No - the TPS7B8125QDGNRQ1 is not characterized for dropout operation at 2.5V output because its minimum input voltage specification (3V) exceeds the sum of 2.5V + dropout voltage. The datasheet explicitly states dropout data is not valid for the 2.5V option due to this constraint. For reliable regulation, VIN must remain ≥3V, and the device enters disabled mode if VIN falls below the 2.7V UVLO threshold.
How does the thermal pad on the TPS7B8125QDGNRQ1 DGN package affect performance?
The exposed thermal pad on the TPS7B8125QDGNRQ1 DGN package is electrically connected to GND and serves as the primary heat conduction path. Soldering it to a large-area GND plane with ≥4 thermal vias (300µm drill, 25µm plating) reduces RθJA from 63.9°C/W to ~35°C/W in practice, enabling full 150mA output at TA = 125°C. Leaving the pad unconnected or floating increases junction temperature by >40°C and risks thermal shutdown under sustained load.
Is the TPS7B8125QDGNRQ1 pin-compatible with other TPS7B81-Q1 variants?
Yes - all TPS7B81-Q1 variants in the DGN (HVSSOP-8) package, including TPS7B8125QDGNRQ1, TPS7B8133QDGNRQ1, and TPS7B8150QDGNRQ1, share identical pinout, footprint, and thermal pad layout. They differ only in fixed output voltage (2.5V, 3.3V, or 5V) and corresponding dropout specifications. This allows drop-in replacement during design iteration or voltage rail optimization without PCB revision.
TPS7B8125QDGNRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.65V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 3.5 µA
- Current - Supply (Max):
- 6.5 µA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
TPS7B8125QDGNRQ1 FAQ
1.How can I place an order for TPS7B8125QDGNRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B8125QDGNRQ1 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 TPS7B8125QDGNRQ1 reliable?
The price and inventory of TPS7B8125QDGNRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B8125QDGNRQ1 is usually 5 days.
3.What payment methods are accepted for TPS7B8125QDGNRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B8125QDGNRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B8125QDGNRQ1?
TPS7B8125QDGNRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B8125QDGNRQ1 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 TPS7B8125QDGNRQ1?
For technical support, including TPS7B8125QDGNRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B8125QDGNRQ1 requirements.
6.How does Aetrix verify that TPS7B8125QDGNRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS7B8125QDGNRQ1 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 TPS7B8125QDGNRQ1 meets industry standards.
7.What is the process for return or replacement of TPS7B8125QDGNRQ1?
All TPS7B8125QDGNRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B8125QDGNRQ1, 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 TPS7B8125QDGNRQ1 part is unused and in its original packaging.
Return procedure for TPS7B8125QDGNRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS7B8125QDGNRQ1 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
