My Inquiry
My Account
Texas Instruments TPS54331QDRQ1
- Part No.:
- TPS54331QDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS54331QDRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,305
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS54331QDRQ1 from Texas Instruments is an automotive-grade 28-V, 3-A non-synchronous buck DC/DC converter with integrated 80 mΩ high-side MOSFET, fixed 570 kHz switching frequency, Eco-mode™ pulse-skipping for light-load efficiency, and adjustable output down to 0.8 V. It delivers stable 3.3 V/3 A power in automotive infotainment systems with input range 3.5–28 V.
For engineers reviewing the TPS54331QDRQ1 datasheet, TPS54331QDRQ1 pinout, TPS54331QDRQ1 application, or TPS54331QDRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, 1 mA shutdown current, programmable UVLO, overvoltage transient protection, and thermal shutdown at 165°C - all critical for automotive power rail design.
Technical Context
The TPS54331QDRQ1 implements fixed-frequency (570 kHz), peak current-mode control with internal slope compensation to ensure stability across >50% duty cycles. Its transconductance error amplifier (92 mmhos) drives the PWM comparator using COMP pin voltage, while cycle-by-cycle current limiting and frequency foldback (down to 570 kHz/8) protect during overload.
Eco-mode™ activation occurs when peak inductor current falls below 160 mA, clamping COMP at 0.5 V to skip pulses and reduce switching losses. The device uses external bootstrap capacitor (BOOT–PH) and integrates boot recharge diode, eliminating discrete components required in traditional buck controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 28 V - supports direct connection to 12 V/24 V automotive batteries including cold-crank transients. |
| Output Current | 3 A continuous - enables single-chip 3.3 V/3 A supply for DSPs, microcontrollers, and display drivers. |
| Switching Frequency | 570 kHz (±20%) - balances EMI performance and inductor size; enables compact 6.8 µH designs. |
| Reference Voltage | 0.8 V ±2% - sets minimum output voltage; used with resistor divider to configure 0.8–28 V outputs. |
| Shutdown Current | 1 mA typical - extends battery life in always-on automotive modules such as telematics and ADAS sensors. |
| Thermal Shutdown | 165°C junction - provides fail-safe protection without external circuitry; auto-recovery after cooldown. |
| Eco-mode™ Threshold | 160 mA peak inductor current - triggers pulse skipping to maintain >85% efficiency at 10 mA load. |
Pinout & Package
TPS54331QDRQ1 is housed in an 8-pin SOIC package (D package) with exposed pad optimized for thermal dissipation (θJA = 100°C/W on 2-layer board with 6 thermal vias). Pin 1 is BOOT; Pin 8 is PH. GND (Pin 7) connects to PCB ground plane for low-impedance return path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply node | Connects to 0.1 µF ceramic capacitor between BOOT and PH; supplies gate drive voltage for high-side MOSFET. |
| VIN | Main input supply | Accepts 3.5–28 V; powers internal bias circuits and high-side driver; requires local 10 µF X7R decoupling. |
| EN | Enable / UVLO control | Pull below 1.25 V to disable; internal 3 µA pull-up enables default operation; supports resistor-divider UVLO programming. |
| SS | Slow-start timing | 2 mA internal current source charges external capacitor; sets soft-start time (1–10 ms typical) to limit inrush. |
| VSENSE | Feedback input | Inverting input of error amplifier; compares output voltage (via resistor divider) to 0.8 V reference. |
| COMP | Error amplifier output | Drives PWM comparator; connects to RC network for loop compensation; clamped at 0.5 V in Eco-mode™. |
| GND | Power and signal ground | Common return for VIN, PH, and internal circuits; must connect to low-impedance PCB ground plane. |
| PH | Power switch node | Source of internal high-side MOSFET; connects to inductor and BOOT capacitor; carries full switching current. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive temperature range (–40°C to +125°C ambient, 150°C junction) with production flow per automotive standards. |
| Integrated 80 mΩ MOSFET | Eliminates external high-side switch; reduces BOM count and layout area; supports 3 A continuous output without heatsink. |
| Overvoltage transient protection | Disables high-side MOSFET if VSENSE exceeds 109% × 0.8 V (0.872 V); prevents output overshoot during load dump or unload events. |
| Programmable UVLO | Two-resistor divider on EN pin sets custom start/stop thresholds (e.g., 7 V start / 6 V stop) with hysteresis for robust battery monitoring. |
| Frequency foldback | Reduces switching frequency to 71 kHz (570 kHz/8) when VSENSE drops below 0.2 V - limits inductor current during short-circuit faults. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, DDR memory, and touchscreen controller in head-unit with 12 V battery input and 3.3 V/2.5 V/1.8 V rails. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 3.3 V @ 3 A with Eco-mode™ maintaining >90% efficiency at standby current. Use Value: AEC-Q100 qualification ensures reliability across temperature cycling; 1 mA shutdown current meets ISO 16750-2 quiescent load requirements. | Use Scenario: Supplies image sensor and ISP in rear-view camera with wide-input capability to handle engine cranking dips (6.5 V). IC Role / Device Role / Timing Role: Non-synchronous buck converter providing regulated 1.8 V output with slow-start (SS pin) preventing sensor reset during power-up. Use Value: Programmable UVLO avoids brownout resets; overvoltage transient protection suppresses 12 V load-dump spikes up to 30 V. |
| Car Audio DSP Power Rail | Telematics Control Unit (TCU) Core Supply |
Use Scenario: Generates clean 1.2 V core voltage for audio DSP in premium sound system with minimal output ripple. IC Role / Device Role / Timing Role: Adjustable-output buck regulator using precision resistor divider; COMP pin compensated for ceramic output capacitors. Use Value: Fixed 570 kHz frequency simplifies EMI filter design; integrated slope compensation eliminates need for external ramp injection. | Use Scenario: Provides always-on 3.3 V supply for cellular modem and GPS receiver in connected vehicle platform. IC Role / Device Role / Timing Role: Automotive DC/DC converter operating in Eco-mode™ during sleep mode (10–50 mA load) to extend battery runtime. Use Value: 165°C thermal shutdown protects against enclosure overheating; SOIC-8 package allows standard reflow assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54332QDRQ1 | 285 kHz switching frequency; higher current limit (4.2 A min); same SOIC-8 package. | Better suited for high-current, low-EMI designs where larger inductors are acceptable. | Select when lower switching loss and reduced EMI outweigh size constraints. |
| LM5143AQDGQRQ1 | Synchronous 3.5–60 V input; 3.5 A output; integrated high- and low-side MOSFETs; 450 kHz–2.2 MHz programmable frequency. | Enables higher efficiency (>95%) and smaller solution size; requires different compensation and layout. | Choose for next-gen automotive systems needing wider VIN range and synchronous rectification. |
Compared with TPS54331QDRQ1, TPS54332QDRQ1 offers lower frequency and higher current but lacks Eco-mode™; LM5143AQDGQRQ1 provides synchronous operation and broader input range but increases design complexity and cost.
Availability
TPS54331QDRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, car audio DSP power rails, and telematics control units requiring stable component supply across extended temperature and lifecycle demands.
Supply support for TPS54331QDRQ1 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, embedded processing, and power management ICs, with leadership in automotive and industrial power solutions.
The TPS54331-Q1 belongs to TI's SWIFT™ family of automotive-qualified DC/DC converters, designed specifically for reliable, high-efficiency power conversion in harsh automotive environments.
FAQ
What is the maximum output current supported by the TPS54331QDRQ1?
The TPS54331QDRQ1 supports up to 3 A continuous output current under recommended operating conditions (TA ≤ 125°C, proper PCB thermal design). Its integrated 80 mΩ high-side MOSFET enables this rating without external switches. Derating applies above 85°C ambient; thermal shutdown activates at 165°C junction temperature to prevent damage. Actual achievable current depends on input voltage, output voltage, and board-level thermal management.
Does the TPS54331QDRQ1 require an external bootstrap diode?
No, the TPS54331QDRQ1 does not require an external bootstrap diode. It integrates a boot recharge diode that automatically refreshes the BOOT–PH capacitor during each switching cycle. A 0.1 µF ceramic capacitor (X7R/X5R) must still be placed between BOOT and PH pins to sustain gate drive voltage for the internal high-side MOSFET. Omitting this capacitor will cause BOOT undervoltage lockout and disable switching.
How is the output voltage adjusted on the TPS54331QDRQ1?
The output voltage of the TPS54331QDRQ1 is adjusted using an external resistor divider connected to the VSENSE pin. The device regulates the voltage at VSENSE to its internal 0.8 V reference. For example, to set 3.3 V output, use R1 = 10.2 kΩ (top) and R2 = 3.24 kΩ (bottom) between VOUT and GND, with VSENSE connected to the divider midpoint. Equation: VOUT = 0.8 V × (1 + R1/R2). Standard 1% resistors achieve ±1% output accuracy.
What protection features are built into the TPS54331QDRQ1?
The TPS54331QDRQ1 includes cycle-by-cycle current limiting, overvoltage transient protection (OVTP), thermal shutdown at 165°C, and input undervoltage lockout (UVLO). OVTP disables the high-side MOSFET if VSENSE exceeds 109% of the reference (0.872 V) to clamp output overshoot. Frequency foldback reduces switching frequency during overload to limit inductor current. All protections are fully integrated - no external components needed for basic fault coverage.
Is the TPS54331QDRQ1 pin-compatible with other devices in the TPS543xx-Q1 family?
The TPS54331QDRQ1 shares the same 8-pin SOIC (D) package and pinout with TPS54231QDRQ1, TPS54232QDRQ1, and TPS54233QDRQ1, enabling drop-in replacement for 2 A variants. However, it is not pin-compatible with TPS54332QDRQ1 (same package but different EN/SS functionality) or TPS54335QDRQ1 (different pinout). Always verify functional compatibility - especially Eco-mode™ behavior, current limit, and UVLO configuration - before substitution.
TPS54331QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Eco-Mode™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 3A
- Frequency - Switching:
- 570kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS54331QDRQ1 FAQ
1.How can I place an order for TPS54331QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS54331QDRQ1 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 TPS54331QDRQ1 reliable?
The price and inventory of TPS54331QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS54331QDRQ1 is usually 5 days.
3.What payment methods are accepted for TPS54331QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS54331QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS54331QDRQ1?
TPS54331QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS54331QDRQ1 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 TPS54331QDRQ1?
For technical support, including TPS54331QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS54331QDRQ1 requirements.
6.How does Aetrix verify that TPS54331QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS54331QDRQ1 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 TPS54331QDRQ1 meets industry standards.
7.What is the process for return or replacement of TPS54331QDRQ1?
All TPS54331QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS54331QDRQ1, 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 TPS54331QDRQ1 part is unused and in its original packaging.
Return procedure for TPS54331QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS54331QDRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
