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Texas Instruments TPS74801QDRCRM3Q1
- Part No.:
- TPS74801QDRCRM3Q1
- Manufacturer:
- Texas Instruments
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
TPS74801QDRCRM3Q1.pdf
- Description:
- TPS74801QDRCRM3Q1
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS74801QDRCRM3Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade LDO linear regulator delivering 1.5A output with programmable soft-start, 0.8V–3.6V adjustable VOUT, ultra-low 0.8V minimum VIN, and 60mV typical dropout at 1.5A (VBIAS = 5V). It integrates power-good monitoring, bias-supply support (2.7V–5.5V), and operates from –40°C to +125°C junction temperature - deployed in telematics control units and infotainment systems.
For engineers reviewing the TPS74801QDRCRM3Q1 datasheet, TPS74801QDRCRM3Q1 pinout, TPS74801QDRCRM3Q1 application, or TPS74801QDRCRM3Q1 equivalent, key selection criteria include its dual-supply architecture (VIN/VBIAS), monotonic soft-start timing control via external capacitor, ±0.3% reference accuracy, and compatibility with ≥2.2μF ceramic output capacitors without stability compensation.
Technical Context
The TPS74801QDRCRM3Q1 uses an NMOS pass transistor architecture powered by a dedicated VBIAS rail, enabling stable regulation down to 0.8V output while decoupling loop stability from output capacitance selection. Its error amplifier tracks an external soft-start capacitor voltage to enforce monotonic VOUT ramping, minimizing inrush current during FPGA/DSP power-up sequences.
Power-good (PG) provides active-high open-drain status signaling with 90% VOUT trip threshold and 3% hysteresis; enable (EN) features 55mV hysteresis and 20μs deglitch for robust sequencing against slow-ramping control signals. Thermal shutdown activates at 165°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VOUT range | 0.8V to 3.6V - supports core voltage scaling for automotive processors and ASICs. |
| VIN min / max | 0.8V to 5.5V - enables direct regulation from low-voltage battery rails or intermediate supplies. |
| VBIAS range | 2.7V to 5.5V - powers internal circuitry independently, improving transient response when VIN is low. |
| Dropout voltage | 60mV typ @ 1.5A (VBIAS = 5V) - minimizes power loss and heat generation in high-current applications. |
| Accuracy | ±0.3% over line/load/temperature (new chip) - ensures tight voltage tolerance for noise-sensitive analog/RF blocks. |
| Soft-start control | Capacitor-programmable (CSS) - enables monotonic, inrush-limited startup for FPGAs and DSPs. |
| Output capacitor | Stable with ≥2.2μF ceramic - eliminates need for ESR-tuned tantalum or polymer caps, reducing BOM cost and footprint. |
| PG threshold | 90% VOUT with 3% hysteresis - provides reliable supply monitoring and sequencing coordination with other regulators. |
Pinout & Package
TPS74801QDRCRM3Q1 is packaged in a 3mm × 3mm × 1mm VSON-10 (DRC) package with exposed thermal pad. Pin numbering follows top-view orientation per Figure 4-1 of the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1,2) | Main input supply | Primary power path to NMOS pass transistor; must be ≥ VOUT + dropout voltage. |
| BIAS (Pin 4) | Bias supply input | Powers internal reference, error amp, and control logic; required when VIN < VOUT + 1.62V. |
| EN (Pin 5) | Enable control | Active-high digital input (VEN ≥ 1.1V enables); includes 55mV hysteresis and 20μs deglitch. |
| SS (Pin 7) | Soft-start timing | Connects to external capacitor (CSS) to set monotonic VOUT ramp time; open = 250μs default. |
| FB (Pin 8) | Feedback node | Connects to resistor divider midpoint; sets VOUT = 0.8V × (1 + R1/R2); must not float. |
| PG (Pin 3) | Power-good output | Open-drain active-high signal; requires external pullup (10kΩ–1MΩ) to monitor VOUT status. |
| OUT (Pins 9,10) | Regulated output | Delivers up to 1.5A; requires ≥2.2μF ceramic capacitor to GND for stability. |
| GND (Pin 6) | Ground reference | Common return for IN, BIAS, FB, PG, and SS; thermal pad must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable soft-start | Monotonic VOUT ramp controlled by external CSS capacitor - prevents inrush current damage to large output capacitors and upstream supplies. |
| Dual-supply architecture | Separate VIN and VBIAS inputs - maintains fast transient response and low dropout even when VIN approaches VOUT. |
| Power-good (PG) output | Open-drain, 90% VOUT trip with 3% hysteresis - enables precise supply sequencing and fault detection in multi-rail systems. |
| Ultra-low dropout | 60mV typical @ 1.5A (VBIAS = 5V) - reduces thermal dissipation and extends battery life in always-on automotive modules. |
| Wide temperature operation | AEC-Q100 Grade 1 (–40°C to +125°C TA) - qualified for under-hood and cockpit electronics with full parametric spec coverage. |
| Capacitor flexibility | Stable with any ≥2.2μF ceramic output capacitor - eliminates ESR constraints and simplifies layout for compact automotive PCBs. |
Applications
| Telematics Control Unit (TCU) | Automotive Infotainment System |
|---|---|
Use Scenario: Powers baseband processor, GNSS receiver, and cellular modem in connected vehicle gateways requiring clean, sequenced 1.2V/1.8V/3.3V rails. IC Role / Device Role / Timing Role: Primary post-regulator for noise-sensitive RF/analog sections; PG output coordinates startup with PMIC and application processor. Use Value: 20× lower output noise vs standard LDOs enables reliable GNSS signal acquisition and LTE modem sensitivity. |
Use Scenario: Supplies display controller, audio codec, and touch controller in head-unit systems with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Adjustable LDO delivering 1.1V core voltage with programmable soft-start to prevent display flicker during cold start. Use Value: 0.8V–3.6V VOUT range and 60mV dropout allow direct regulation from 3.3V main rail, eliminating intermediate conversion stages. |
| Instrument Cluster Display | Medium-Range Radar Module |
Use Scenario: Provides regulated 1.8V for microcontroller and 3.3V for CAN transceiver in digital dashboards with rapid ignition cycles. IC Role / Device Role / Timing Role: Sequencing-capable LDO using EN and PG pins to synchronize with MCU reset and backlight driver enable. Use Value: 55mV EN hysteresis rejects battery ripple during cranking, preventing unintended shutdown during engine start. |
Use Scenario: Delivers ultra-low-noise 1.2V supply to radar transceiver ICs and PLLs in 77GHz ADAS sensors. IC Role / Device Role / Timing Role: Low-noise LDO with CSS-filtered reference - soft-start ensures monotonic ramp for phase-locked loop lock acquisition. Use Value: 20 × VOUT μVRMS noise (10Hz–100kHz) meets stringent spectral purity requirements for radar signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74901QDRCRQ1 | Same pinout, 2A output, higher ICL (6A), 55mV dropout @ 2A, but no VBIAS input - relies solely on VIN for internal biasing. | Lacks independent VBIAS rail; unsuitable for ultra-low-VIN scenarios (<1.2V) or where VIN/VBIAS sequencing is required. | Select when higher output current is needed and VIN ≥ VOUT + 0.5V; avoid when VBIAS decoupling or sub-1V operation is critical. |
| TLV76733QWDRBRQ1 | 3.3V fixed-output, 1A, 300mV dropout @ 1A, no soft-start or PG, smaller 2mm × 2mm WSON-6 package. | No programmability, no sequencing features, limited to single fixed voltage; lacks automotive-grade PG monitoring. | Choose for cost-sensitive, space-constrained applications needing only 3.3V with basic regulation - not for multi-rail sequencing or adjustable designs. |
Compared with TPS74801QDRCRM3Q1, TPS74901QDRCRQ1 offers higher current but forfeits VBIAS flexibility, while TLV76733QWDRBRQ1 trades feature depth for size and cost - making TPS74801QDRCRM3Q1 optimal for programmable, sequenced, low-noise automotive power domains.
Availability
TPS74801QDRCRM3Q1 is available at Aetrix Electronics and suitable for telematics control units, automotive infotainment systems, and medium-range radar modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS74801QDRCRM3Q1 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 electronics, with decades of AEC-Q100 qualification expertise and broad automotive power management portfolio.
The TPS74801-Q1 belongs to TI's automotive-qualified LDO family designed specifically for safety-critical, high-reliability power domains in ADAS, infotainment, and vehicle networking systems.
FAQ
What is the maximum output current capability of the TPS74801QDRCRM3Q1?
The TPS74801QDRCRM3Q1 delivers up to 1.5A continuous output current with internal current limiting set at 2A minimum. Its thermal design in the DRC package supports full 1.5A operation at +125°C ambient when the thermal pad is properly soldered to a 4-layer PCB with ≥1in² copper pour, per TI's SLVSAI4E datasheet Section 5.4.
How does the VBIAS pin improve performance compared to single-supply LDOs?
The VBIAS pin on the TPS74801QDRCRM3Q1 powers the internal reference, error amplifier, and control circuitry independently of VIN. This allows stable regulation and fast transient response even when VIN drops near VOUT - a key advantage over single-supply LDOs that degrade in PSRR and dropout as VIN approaches VOUT.
Can the TPS74801QDRCRM3Q1 operate without connecting the VBIAS pin?
No - the TPS74801QDRCRM3Q1 requires VBIAS to be connected within 2.7V–5.5V whenever VIN is below VOUT + 1.62V. If VBIAS is unconnected under those conditions, regulation fails and VOUT collapses. When VIN ≥ VOUT + 1.62V, VBIAS may be tied to VIN, but dedicated biasing is recommended for best noise and transient performance.
What soft-start capacitor value should be used for a 10ms ramp time at 1.2V output?
Using Equation 1 from the TPS74801QDRCRM3Q1 datasheet (tSS = (VREF × CSS)/ISS), with VREF = 0.8V and ISS = 530nA (new chip), a 10ms ramp requires CSS ≈ 6.6nF. A standard 6.8nF X7R ceramic capacitor is recommended - values above 15nF risk incomplete discharge during rapid enable cycling.
Is the TPS74801QDRCRM3Q1 pin-compatible with other devices in the TPS748xx-Q1 family?
Yes - the TPS74801QDRCRM3Q1 shares identical pinout and footprint with TPS74801QDRCRQ1 (same DRC package) and TPS74801QRGWQ1 (RGW package differs). However, the "M3" suffix denotes the new-chip revision with improved accuracy (±0.3%), lower dropout (50mV), and enhanced PSRR - all within the same mechanical interface.
TPS74801QDRCRM3Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.6V
- Voltage Dropout (Max):
- 0.165V @ 1.5A
- Current - Output:
- 1.5A
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 30dB (1kHz ~ 300kHz)
- Control Features:
- Current Limit
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSON (3x3)
TPS74801QDRCRM3Q1 FAQ
1.How can I place an order for TPS74801QDRCRM3Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS74801QDRCRM3Q1 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 TPS74801QDRCRM3Q1 reliable?
The price and inventory of TPS74801QDRCRM3Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS74801QDRCRM3Q1 is usually 5 days.
3.What payment methods are accepted for TPS74801QDRCRM3Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS74801QDRCRM3Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS74801QDRCRM3Q1?
TPS74801QDRCRM3Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS74801QDRCRM3Q1 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 TPS74801QDRCRM3Q1?
For technical support, including TPS74801QDRCRM3Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS74801QDRCRM3Q1 requirements.
6.How does Aetrix verify that TPS74801QDRCRM3Q1 is sourced from the original manufacturer or authorized distributors?
All TPS74801QDRCRM3Q1 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 TPS74801QDRCRM3Q1 meets industry standards.
7.What is the process for return or replacement of TPS74801QDRCRM3Q1?
All TPS74801QDRCRM3Q1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS74801QDRCRM3Q1, 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 TPS74801QDRCRM3Q1 part is unused and in its original packaging.
Return procedure for TPS74801QDRCRM3Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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