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Texas Instruments TPS65051QRSMRQ1
- Part No.:
- TPS65051QRSMRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65051QRSMRQ1.pdf
- Description:
- IC PWR MGMT 6CH W/4 LDO 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
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Product details
Overview
TPS65051QRSMRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 6-channel power management IC integrating two synchronous step-down converters (1 A DCDC1, 0.6 A DCDC2) and four low-input-voltage LDOs (two 400-mA, two 200-mA), all with independent enable control and external voltage programming via resistor dividers. It operates from a single Li-ion/Li-polymer cell (2.5 V–6 V input) and targets processor-based infotainment and cluster systems requiring tightly sequenced, low-noise rails.
For engineers reviewing the TPS65051QRSMRQ1 datasheet, TPS65051QRSMRQ1 pinout, TPS65051QRSMRQ1 application, or TPS65051QRSMRQ1 equivalent, key selection criteria include its 2.25-MHz fixed-frequency PWM/PSM dual-mode operation, ±1% output accuracy in PWM mode, 32-μA typical quiescent current for both DC-DCs, 180° out-of-phase switching to reduce input ripple, and automotive-grade thermal performance up to +125°C ambient.
Technical Context
The TPS65051QRSMRQ1 implements voltage-mode control with input voltage feed-forward for fast line/load regulation in its two synchronous buck converters, supporting dynamic voltage positioning to improve transient response during light-to-heavy load steps. Each converter features internal soft-start, 100% duty-cycle low-dropout operation, and adaptive dead-time control to prevent shoot-through.
Its four LDOs operate across 1.5 V–6.5 V input range with 1-V feedback reference, ±2% output accuracy, 70-dB PSRR at 10 kHz, and integrated 350-Ω discharge resistors active during disable. The RESET function uses a comparator with 1-V threshold and 100-ms delay, configurable via external THRESHOLD and HYSTERESIS pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCDC1 Output Current | 1 A maximum - supports I/O rail for automotive processors or FPGAs without external current boosting |
| DCDC2 Output Current | 600 mA maximum - supplies core voltage for low-power microcontrollers or DSPs |
| Switching Frequency | 2.25 MHz typical - enables use of small 1.5–2.2 μH inductors and 10–22 μF ceramic output capacitors |
| LDO Output Accuracy | ±2% over load/line/temperature - ensures stable logic-level compliance for interface peripherals |
| Quiescent Current (Both DC-DC) | 32 μA typical in PFM mode - extends battery runtime in always-on automotive modules |
| Operating Ambient Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard applications |
| RESET Delay Time | 100 ms nominal - provides deterministic system reset timing after brownout recovery |
Pinout & Package
TPS65051QRSMRQ1 is housed in a thermally enhanced 4-mm × 4-mm 32-pin VQFN package (RSM) with exposed thermal pad connected to AGND/PGND. Pin count and layout support full independent control of all six regulators plus comprehensive monitoring and sequencing functions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN_DCDC1 (Pin 25) | Enable input for DCDC1 | Active-high digital control - allows precise power-up sequencing of I/O rail before core rail |
| FB_DCDC1 (Pin 24) | Feedback input for DCDC1 | Connects to external resistor divider - sets output voltage from 0.6 V to VIN with ±1% accuracy in PWM mode |
| DEFDCDC2 (Pin 17) | Feedback pin for DCDC2 | Center-tap connection point for external resistor divider - configures core rail voltage independently of DCDC1 |
| EN_LDO1–EN_LDO4 (Pins 27, 28, 15, 16) | Independent LDO enable inputs | Four separate logic-level controls - enables flexible rail activation order and dynamic power gating |
| THRESHOLD (Pin 7) | Reset comparator input | Monitors system supply voltage - triggers open-drain RESET (Pin 14) when falling below 1.0 V threshold |
| MODE (Pin 32) | DC-DC operating mode select | GND = auto PFM/PWM; VI = forced PWM - selectable per system noise vs. efficiency trade-off |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase DC-DC operation | Reduces RMS input current by ~30%, allowing smaller 1-μF input capacitors and lower EMI |
| Dynamic voltage positioning (DVP) | Maintains +1% nominal output at light load, dropping to –1% at heavy load - improves transient headroom without external compensation |
| Integrated LDO discharge resistors | 350 Ω per LDO - actively pulls VLDOx to GND during disable, preventing floating outputs and enabling fast rail collapse |
| Undervoltage lockout (UVLO) | 1.8 V typical threshold at VCC pin - prevents erratic startup and deep battery discharge in automotive cold-crank conditions |
| Power-save mode quiescent current | 32 μA total for both DC-DCs - achieves >90% efficiency down to 100-μA load, critical for always-on telematics modules |
Applications
| Automotive Infotainment Head Unit | Instrument Cluster Display |
|---|---|
Use Scenario: Powering ARM-based SoC, DDR memory, touchscreen controller, and audio codec from single Li-ion battery. IC Role / Device Role / Timing Role: Primary PMIC delivering sequenced 1.2-V core, 3.3-V I/O, 1.8-V memory, and 5-V display backlight rails with RESET supervision. Use Value: 2.25-MHz switching minimizes EMI near AM/FM radio receivers; independent LDO enables selective shutdown of non-critical subsystems during sleep mode. |
Use Scenario: Supplying MCU, TFT LCD driver, CAN transceiver, and LED backlight in digital instrument panel. IC Role / Device Role / Timing Role: Central power hub generating 3.3-V MCU rail, 5-V display rail, 1.2-V graphics core, and 2.5-V sensor interface with fail-safe RESET signaling. Use Value: AEC-Q100 Grade 1 qualification ensures reliability at +125°C ambient; 100-ms RESET delay prevents spurious resets during engine cranking voltage dips. |
| Automotive Digital Radio Tuner | Telematics Control Unit (TCU) |
Use Scenario: Providing clean, low-noise power to RF front-end, DSP, and SD card interface in satellite radio module. IC Role / Device Role / Timing Role: Dual DC-DC + quad LDO architecture isolates sensitive analog RF sections from noisy digital domains using dedicated LDOs. Use Value: 70-dB PSRR at 10 kHz suppresses switching noise coupling into IF stages; MODE pin allows forced PWM during audio playback to eliminate audible beat frequencies. |
Use Scenario: Managing power for LTE modem, GPS receiver, eCall processor, and cellular antenna switch in connected vehicle gateway. IC Role / Device Role / Timing Role: Sequenced enable control coordinates wake-up of modem (LDO3), GPS (LDO4), and main MCU (DCDC2) based on CAN bus activity. Use Value: 32-μA quiescent current extends battery backup runtime during ignition-off monitoring; THRESHOLD/HYSTERESIS pins allow custom brownout detection for cellular network reacquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65053QRSMRQ1 | Same pinout and feature set but adds integrated watchdog timer and enhanced RESET flexibility; higher BOM cost | Required where system-level fault detection and autonomous recovery are mandated (e.g., ASIL-B modules) | Select when watchdog functionality is needed; otherwise TPS65051QRSMRQ1 offers identical power delivery at lower cost |
| TPS65056QRSMRQ1 | Omits LDO3/LDO4; retains DCDC1, DCDC2, LDO1, LDO2 - reduced channel count and smaller footprint | Suitable for simpler systems needing only two LDOs (e.g., basic MCU + peripheral rail) | Choose for cost-sensitive designs with fewer regulated rails; not a drop-in replacement due to missing LDO3/LDO4 pins and functions |
Compared with TPS65053QRSMRQ1 and TPS65056QRSMRQ1, the TPS65051QRSMRQ1 uniquely balances full 6-channel capability with minimal bill-of-materials overhead-retaining all four LDOs for flexible peripheral powering while omitting non-essential features like watchdog timers to optimize cost and design simplicity for mainstream automotive infotainment.
Availability
TPS65051QRSMRQ1 is available at Aetrix Electronics and suitable for automotive infotainment head units, digital instrument clusters, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS65051QRSMRQ1 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 and embedded processing technologies, with decades of automotive-grade power management innovation and AEC-Q100 validation expertise.
The TPS6505x-Q1 product line was designed specifically for single-cell Li-ion powered automotive electronics, delivering high-efficiency, space-constrained, and thermally robust power solutions for infotainment, cluster, and connectivity modules.
FAQ
What is the maximum input voltage supported by TPS65051QRSMRQ1 for its DC-DC converters?
The TPS65051QRSMRQ1 supports an input voltage range of 2.5 V to 6 V for its DC-DC converters (VINDCDC1/2). This range accommodates standard Li-ion/Li-polymer battery voltages including full charge (4.2 V), nominal (3.7 V), and end-of-discharge (~2.8 V), while maintaining regulation through the entire usable battery window. Operation above 6 V risks permanent damage per absolute maximum ratings.
How does the MODE pin affect efficiency and noise performance of TPS65051QRSMRQ1?
When the MODE pin is pulled low (GND), TPS65051QRSMRQ1 automatically switches between pulse-frequency modulation (PFM) at light loads and fixed-frequency PWM at moderate/heavy loads-maximizing efficiency across the full load range. When pulled high (VI), it forces continuous PWM operation, eliminating frequency variation and associated audible noise or EMI peaks but reducing light-load efficiency by ~15–20% due to constant switching losses.
Can TPS65051QRSMRQ1 generate a system reset signal, and how is it configured?
Yes, TPS65051QRSMRQ1 provides an open-drain active-low RESET signal (Pin 14) with a nominal 100-ms delay. It is triggered by an internal comparator monitoring the THRESHOLD pin (Pin 7). The reset threshold is set to 1.0 V ±20 mV, and hysteresis is adjustable via the HYSTERESIS pin (Pin 8) to prevent chatter during slow voltage ramps. No external components are required for basic operation.
What is the purpose of the DEFDCDC2 pin on TPS65051QRSMRQ1, and how is it used?
The DEFDCDC2 pin (Pin 17) serves as the feedback node for the DCDC2 converter's output voltage setting. Unlike DCDC1 which uses FB_DCDC1, DCDC2 requires connection of the DEFDCDC2 pin to the center tap of an external resistor divider between VLDO2 and GND. This configuration allows independent programming of DCDC2's output (e.g., 1.2 V core) without affecting DCDC1's I/O rail voltage, enabling optimized power delivery for heterogeneous processor subsystems.
Does TPS65051QRSMRQ1 support independent enable control for all six regulators?
Yes, TPS65051QRSMRQ1 provides six dedicated enable inputs: EN_DCDC1 (Pin 25), EN_DCDC2 (Pin 26), EN_LDO1 (Pin 27), EN_LDO2 (Pin 28), EN_LDO3 (Pin 15), and EN_LDO4 (Pin 16). Each is active-high and electrically isolated, allowing full software- or hardware-controlled sequencing-such as powering DCDC1 first for I/O, then DCDC2 for core, followed by LDOs in priority order-to meet processor boot requirements and minimize inrush current.
TPS65051QRSMRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 1.25mA
- Voltage - Supply:
- 1.5V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
TPS65051QRSMRQ1 FAQ
1.How can I place an order for TPS65051QRSMRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65051QRSMRQ1 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 TPS65051QRSMRQ1 reliable?
The price and inventory of TPS65051QRSMRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65051QRSMRQ1 is usually 5 days.
3.What payment methods are accepted for TPS65051QRSMRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65051QRSMRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65051QRSMRQ1?
TPS65051QRSMRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65051QRSMRQ1 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 TPS65051QRSMRQ1?
For technical support, including TPS65051QRSMRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65051QRSMRQ1 requirements.
6.How does Aetrix verify that TPS65051QRSMRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65051QRSMRQ1 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 TPS65051QRSMRQ1 meets industry standards.
7.What is the process for return or replacement of TPS65051QRSMRQ1?
All TPS65051QRSMRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65051QRSMRQ1, 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 TPS65051QRSMRQ1 part is unused and in its original packaging.
Return procedure for TPS65051QRSMRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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