My Inquiry
My Account
Texas Instruments TPS7B4256QDRQ1
- Part No.:
- TPS7B4256QDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS7B4256QDRQ1.pdf
- Description:
- TPS7B4256QDRQ1
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS7B4256QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive LDO voltage tracker delivering 70 mA output with ±6 mV tracking tolerance, 225 mV max dropout at full load, and operation across 3 V to 40 V input for off-board sensor power in harsh environments.
For engineers reviewing the TPS7B4256QDRQ1 datasheet, TPS7B4256QDRQ1 pinout, TPS7B4256QDRQ1 application, or TPS7B4256QDRQ1 equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade protection features, and real-world sensor-supply use cases - all aligned to SBVS397A (Nov 2023) production data.
Technical Context
The TPS7B4256QDRQ1 implements a back-to-back PMOS topology enabling reverse current and reverse polarity protection without external diodes, while its error amplifier compares FB voltage against ADJ/EN reference to maintain ≤6 mV tracking error across –40°C to +150°C junction temperature.
It integrates brick-wall current limiting (85–125 mA), thermal shutdown (175°C trip, 15°C hysteresis), undervoltage lockout (2.6–2.85 V rising threshold), and operates with ceramic output capacitors from 1 µF to 100 µF and ESR 1 mΩ to 2 Ω - all validated for automotive load-dump survival up to 45 V absolute max input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 70 mA max - sufficient to power multiple ratiometric sensors or ADC reference buffers over long cables. |
| Tracking tolerance | ±6 mV max - ensures high-precision sensor supply matching ADC reference, critical for ratiometric measurement accuracy. |
| Dropout voltage | 225 mV max at 70 mA - enables stable regulation even during cold-crank (≥6 V battery) or low-VIN transients. |
| Input voltage range | 3 V to 40 V operating; –40 V to +45 V absolute max - withstands automotive load dump, jump-start, and reverse-battery faults. |
| Quiescent current | 60 µA typical at light load; <3.5 µA in shutdown - supports always-on sensor nodes with ultra-low standby power. |
| Thermal resistance | RθJA = 53.3°C/W (DDA package) - enables 2 W+ continuous dissipation with proper PCB copper pour and thermal pad grounding. |
| Protection features | Reverse current, reverse polarity, output short-to-GND/supply, overtemperature, UVLO - eliminates need for discrete protection circuitry. |
Pinout & Package
TPS7B4256QDRQ1 is available in 8-pin HSOIC (DDA) package with exposed thermal pad (4.9 mm × 6 mm), rated RθJA = 53.3°C/W. Pinout applies to DDA variant per Figure 4-2 and Table 4-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ADJ/EN | Adjustable reference input / enable control | Accepts 2–40 V reference; logic-low (<0.8 V) disables LDO into 3.5 µA shutdown; requires 0.1 µF local bypass for noise immunity. |
| FB | Feedback node | Non-inverting input of error amplifier; tied directly to OUT for 1:1 tracking, or used with resistor divider for scaled output voltages. |
| GND | Ground connection | Four dedicated GND pins (pins 2,3,6,7 in DDA) - must connect to low-impedance ground plane; thermal pad also connected to GND. |
| IN | Main power input | Accepts 3–40 V unregulated supply; requires ≥1 µF ceramic capacitor close to pin for EMI suppression and transient response. |
| OUT | Regulated output | Delivers tracked voltage up to 70 mA; requires 1–100 µF ceramic capacitor with 1 mΩ–2 Ω ESR for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage tracking precision | ±6 mV max tracking error across –40°C to +150°C - enables direct buffering of ADC reference over long cables without gain drift compensation. |
| Fault resilience | Integrated back-to-back PMOS topology eliminates external diode - blocks reverse current in <1 µs and survives short-to-battery (14 V) with VIN = 7 V. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient, –40°C to +150°C junction) - qualified for powertrain sensor modules requiring zero-failure reliability. |
| Flexible output scaling | Output can be set equal to, lower than, or higher than ADJ/EN reference using resistor dividers - supports 2–40 V output range with single device. |
| Low-noise regulation | 150 µVRMS output noise (3.3 V out, 1 mA load) and 80 dB PSRR at 100 Hz - preserves signal integrity for precision analog sensor interfaces. |
Applications
| Powertrain Pressure Sensors | Powertrain Exhaust Sensors |
|---|---|
Use Scenario: Supplying piezoresistive pressure sensors mounted on engine manifolds, exposed to vibration, oil mist, and wide temperature swings. IC Role / Device Role / Timing Role: Voltage tracker delivering stable, ratiometric supply synchronized to ADC reference voltage over 1–3 m cable runs. Use Value: ±6 mV tracking tolerance maintains measurement linearity and eliminates calibration drift caused by supply-reference mismatch under thermal stress. |
Use Scenario: Powering NOx, O2, or exhaust gas temperature sensors in diesel aftertreatment systems with high EMI and thermal cycling. IC Role / Device Role / Timing Role: Fault-tolerant LDO providing isolated, protected 5 V or 3.3 V rail to sensor electronics located downstream of catalytic converters. Use Value: Reverse polarity and short-to-battery protection prevent field failures during service disconnect/reconnect or wiring errors in tight under-hood spaces. |
| Body Control Modules (BCM) | Off-Board Ratiometric Sensor Interfaces |
Use Scenario: Regulating power for door module sensors (position, latch, humidity) in distributed BCM architectures with shared battery rails. IC Role / Device Role / Timing Role: Low-quiescent-current LDO (60 µA active, <3.5 µA shutdown) enabling always-on wake-up capability without battery drain. Use Value: UVLO and thermal shutdown ensure safe operation during battery voltage sag or enclosure overheating - critical for ASIL-B compliant subsystems. |
Use Scenario: Transmitting precise reference voltage from control board to remote analog sensors (e.g., fuel level, brake fluid level) via long harnesses. IC Role / Device Role / Timing Role: Active buffer isolating ADC reference from cable-induced drop, noise, and fault currents in ratiometric measurement chains. Use Value: Combined 1 µF–100 µF capacitor compatibility and 1 mΩ–2 Ω ESR range simplifies layout and eliminates need for custom RC networks or ferrite beads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-tracking LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7B4250QDRQ1 | Same 70-mA rating and 6-mV tracking, but lacks reverse polarity protection and has higher RθJA (101°C/W in SOIC). | Suitable only for less demanding locations (e.g., interior modules) where reverse-battery risk is mitigated externally. | Select when cost sensitivity outweighs under-hood fault resilience requirements and thermal margin permits SOIC packaging. |
| NCP160AMX330TBG | 330-mA output, no tracking function, ±2% output accuracy, no reverse current protection, not AEC-Q100 qualified. | Limited to non-ratiometric, non-automotive applications such as industrial sensor hubs with local regulation. | Choose only for non-automotive designs requiring higher current and where reference tracking and fault protection are handled elsewhere. |
Compared with TPS7B4250QDRQ1 and NCP160AMX330TBG, the TPS7B4256QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, ±6 mV tracking, reverse polarity protection, and HSOIC thermal performance - making it the sole option for safety-critical, ratiometric, off-board automotive sensor supplies.
Availability
TPS7B4256QDRQ1 is available at Aetrix Electronics and suitable for powertrain sensor modules, body control units, and ratiometric analog interface designs requiring stable component supply, automotive-grade reliability, and long-term lifecycle support.
Supply support for TPS7B4256QDRQ1 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 ICs, with decades of automotive qualification expertise and broad functional safety support.
The TPS7B4256QDRQ1 belongs to TI's automotive LDO portfolio designed specifically for robust, fault-tolerant power delivery to off-board sensors - addressing cable fault risks, ratiometric accuracy needs, and ASIL-ready system architecture.
FAQ
What is the maximum input voltage the TPS7B4256QDRQ1 can withstand?
The TPS7B4256QDRQ1 has an absolute maximum input voltage rating of +45 V and –40 V, enabling reliable operation during automotive load-dump transients (ISO 7637-2 Pulse 5a) and reverse-battery conditions. Its operating input range is 3 V to 40 V, supporting cold-crank down to 3 V while maintaining regulation.
How does the TPS7B4256QDRQ1 achieve ±6 mV tracking tolerance?
The TPS7B4256QDRQ1 achieves ±6 mV tracking tolerance through a precision internal error amplifier comparing FB voltage to the ADJ/EN reference, combined with matched on-chip resistor networks and process compensation across –40°C to +150°C junction temperature - verified per SBVS397A electrical characteristics table.
Can the TPS7B4256QDRQ1 be used to generate output voltages higher than the ADJ/EN reference?
Yes - the TPS7B4256QDRQ1 supports output voltages higher than the ADJ/EN reference by connecting an external resistor divider between FB and OUT pins. Equation 3 in the datasheet (VOUT = VREF × [1 + R1/R2]) defines the scaling, with R1 and R2 both ≤100 kΩ to minimize leakage-induced error.
What protection features are integrated into the TPS7B4256QDRQ1?
The TPS7B4256QDRQ1 integrates reverse current protection (via back-to-back PMOS), reverse polarity protection, overtemperature shutdown (175°C trip), brick-wall current limiting (85–125 mA), and undervoltage lockout (2.6–2.85 V rising threshold) - eliminating need for external protection components in automotive sensor power designs.
Is the TPS7B4256QDRQ1 compatible with ceramic output capacitors?
Yes - the TPS7B4256QDRQ1 is stable with ceramic output capacitors ranging from 1 µF to 100 µF and ESR from 1 mΩ to 2 Ω, as confirmed in Figure 5-18 and Section 5.5. This eliminates need for tantalum or electrolytic capacitors and simplifies layout for space-constrained automotive modules.
TPS7B4256QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 40V
- Voltage Dropout (Max):
- 0.225V @ 70mA
- Current - Output:
- 70mA
- Current - Quiescent (Iq):
- 70 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit
- Protection Features:
- Over Current, Over Temperature, Reverse Current, Reverse Polarity, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS7B4256QDRQ1 FAQ
1.How can I place an order for TPS7B4256QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS7B4256QDRQ1 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 TPS7B4256QDRQ1 reliable?
The price and inventory of TPS7B4256QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS7B4256QDRQ1 is usually 5 days.
3.What payment methods are accepted for TPS7B4256QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS7B4256QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS7B4256QDRQ1?
TPS7B4256QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS7B4256QDRQ1 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 TPS7B4256QDRQ1?
For technical support, including TPS7B4256QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS7B4256QDRQ1 requirements.
6.How does Aetrix verify that TPS7B4256QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS7B4256QDRQ1 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 TPS7B4256QDRQ1 meets industry standards.
7.What is the process for return or replacement of TPS7B4256QDRQ1?
All TPS7B4256QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS7B4256QDRQ1, 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 TPS7B4256QDRQ1 part is unused and in its original packaging.
Return procedure for TPS7B4256QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS7B4256QDRQ1 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 practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
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…
