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Texas Instruments TPS55165QPWPRQ1
- Part No.:
- TPS55165QPWPRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS55165QPWPRQ1.pdf
- Description:
- IC REG BUCK BST 5V/12V 20HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
TPS55165QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive synchronous buck-boost DC-DC converter delivering fixed 5-V or 12-V output at up to 1-A load, operating from 2-V to 36-V input, with 2-MHz fixed-frequency PWM control and automatic step-up/step-down mode transition. It serves as the primary power rail for infotainment systems and body control modules in start-stop vehicles.
For engineers reviewing the TPS55165QPWPRQ1 datasheet, TPS55165QPWPRQ1 pinout, TPS55165QPWPRQ1 application, or TPS55165QPWPRQ1 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal performance in HTSSOP PowerPAD™, and real-world automotive use cases - all grounded in TI's SLVSD46A production datasheet.
Technical Context
The TPS55165QPWPRQ1 implements a single-inductor, four-switch synchronous buck-boost topology with overlap control logic that enables seamless, loss-minimized transitions between buck and boost modes across wide VIN ranges (e.g., 2 V to 36 V). Its internal gate drivers support 2-MHz switching with integrated bootstrap circuits for both buck (BST1/L1) and boost (BST2/L2) stages.
It integrates functional safety features including configurable power-good with programmable delay (PG_DLY), overtemperature shutdown (175°C–210°C threshold), output overvoltage protection (110%–125% of nominal), and ignition wake-up with hysteresis (IGNPD = 1.5–2.7 V, IGNWAKE = 2.5–3.7 V), meeting ASIL-B system-level requirements when implemented per TI's safety documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2 V to 36 V (VINP/VINL); supports cold-crank (2.3 V) and load-dump (36 V) conditions in automotive battery systems |
| Output Voltage | Fixed 5 V (VOS_FB = GND) or 12 V (VOS_FB = VREG); ±2% regulation accuracy over line/load/temp |
| Max Output Current | 1 A at 5 V with VIN ≥ 5.3 V; 0.8 A at VIN ≥ 3.8 V; 0.4 A at VIN ≥ 2.3 V - maintains ECU operation during cranking |
| Switching Frequency | 2 MHz (fixed, forced-PWM); enables <5-mm² inductor footprint and reduces EMI fundamental frequency |
| Quiescent Current | <15 µA in low-power mode (PS = high); meets OEM standby current budgets for always-on CAN listening |
| Shutdown Current | <3 µA (IGN = low); minimizes parasitic drain on 12-V battery during vehicle off-state |
| Package Thermal Resistance | RθJA = 35.4°C/W (HTSSOP-20 PowerPAD™); enables 1-A operation without external heatsink at TA ≤ 85°C |
Pinout & Package
TPS55165QPWPRQ1 uses a 20-pin HTSSOP PowerPAD™ package (6.50 mm × 4.40 mm) with exposed thermal pad soldered to PGND for enhanced thermal dissipation. Pin numbering follows TI standard top-view orientation (Pin 1 = PGND, Pin 20 = L2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground reference | Main return path for high-current switch nodes (L1/L2) and output capacitor; must connect to thermal pad |
| L1 (2), L2 (20) | Buck/boost switch nodes | Connect opposite ends of same 4.7-µH inductor; define buck (L1→VINP) and boost (L2→VOUT) current paths |
| BST1 (3), BST2 (19) | Bootstrap supply inputs | Drive high-side FET gates via 100-nF capacitors (BST1–L1, BST2–L2); enable 100% duty cycle capability |
| VINP (4), VINL (5) | Main and bias supply inputs | VINP handles full input current; VINL powers internal LDOs - both require 10-µF ceramic input capacitance |
| IGN (6) | Ignition wake-up enable | High-voltage tolerant (–7 V to 40 V); triggers startup from battery; hysteresis prevents chatter during cranking transients |
| PS (7) | Low-power mode control | Logic-high enables ultra-low-IQ mode (<15 µA); logic-low forces continuous 2-MHz operation across full load range |
| VOS_FB (14) | Output voltage select | GND = 5 V output; VREG = 12 V output - no external resistor divider required for fixed outputs |
| PG (15) | Open-drain power-good | Asserts low if VOUT deviates >5% from nominal; delay configurable via RDLY (0.5–40 ms) on PG_DLY (10) |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode transition | Eliminates output discontinuity during VIN crossover (e.g., 5 V → 4.5 V); maintains regulated VOUT without external control logic |
| Selectable spread spectrum (SS_EN) | Reduces peak radiated EMI by spreading 2-MHz clock energy; enabled by leaving SS_EN floating, disabled by pulling low |
| Power-latch function (IGN_PWRL) | Allows MCU to hold IGN assertion after key-off; sustains VOUT for post-crash diagnostics or firmware upload without battery drain |
| Smart power-good with delay | PG_DLY pin sets delay from 0.5 ms to 40 ms; prevents false PG assertion during soft-start or transient recovery |
| Functional safety documentation support | TI provides FIT rate data, failure mode analysis, and safety manual - enables ISO 26262 ASIL-B system integration |
Applications
| Infotainment Power Supply | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powers head-unit SoC and display backlight during engine start-stop cycles where battery voltage dips to 2.3 V. IC Role / Device Role / Timing Role: Primary 5-V buck-boost regulator providing stable rail independent of battery sag; replaces discrete buck + boost solutions. Use Value: Delivers 0.4-A minimum output at 2.3-V input, enabling uninterrupted audio/video playback and CAN communication during cranking. |
Use Scenario: Supplies 12-V actuators (door locks, window motors) and microcontrollers in gateway ECUs with wide-input battery interface. IC Role / Device Role / Timing Role: Fixed 12-V output regulator with ignition-controlled enable (IGN) and power-latch (IGN_PWRL) for controlled wake/sleep sequencing. Use Value: Supports 800-mA load at 14-V input; PG signal synchronizes MCU boot with rail stability, reducing firmware initialization failures. |
| Solar Charge Controller Interface | Li-ion Battery Pack Monitor |
|
Use Scenario: Interfaces solar panel (8–32 V) to charge 12-V lead-acid backup battery in telematics units with variable irradiance. IC Role / Device Role / Timing Role: Wide-input buck-boost converter regulating charging voltage; operates continuously across partial shading events. Use Value: Maintains 12-V output with >85% efficiency from 8-V to 32-V input; spread spectrum (SS_EN) suppresses EMI near sensitive RF receivers. |
Use Scenario: Powers fuel-gauge IC and CAN transceiver in multi-cell Li-ion packs where cell voltage varies from 3.0 V to 4.2 V per cell. IC Role / Device Role / Timing Role: Step-up regulator generating stable 5-V rail from partially discharged pack (e.g., 3×3.2 V = 9.6 V min). Use Value: Delivers 1-A output at 5 V with VIN ≥ 5.3 V; low-power mode extends shelf-life monitoring duration with <15 µA quiescent draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Single-phase 3.5-A buck-only regulator (no boost); 4-V to 36-V input; requires external boost stage for sub-input regulation | Only suitable where VIN never falls below regulated output (e.g., 12-V systems powering 5-V rails); cannot replace TPS55165QPWPRQ1 in cranking scenarios | Select LM61480-Q1 only if input stays ≥ output voltage; use TPS55165QPWPRQ1 when VIN may dip below VOUT (e.g., automotive start-stop) |
| MAX20404 | 36-V, 2.5-A buck-boost with I²C interface; adjustable output (1.8 V–12 V); no fixed 5-V/12-V option; higher IQ (25 µA) | Requires MCU configuration for voltage setting; lacks ignition wake-up (IGN) and power-latch (IGN_PWRL) pins critical for automotive ECU control | Choose MAX20404 for programmable multi-rail systems with host MCU control; retain TPS55165QPWPRQ1 for drop-in fixed-output, ignition-triggered designs |
Compared with LM61480-Q1 and MAX20404, the TPS55165QPWPRQ1 uniquely combines fixed 5-V/12-V outputs, ignition wake-up, power-latch, and true buck-boost operation in a single 20-pin HTSSOP - eliminating external logic and reducing BOM count for automotive ECU power supplies.
Availability
TPS55165QPWPRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and industrial battery-powered equipment requiring stable component supply under AEC-Q100 Grade 1 conditions.
Supply support for TPS55165QPWPRQ1 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.
The TPS5516x-Q1 product line was designed specifically for automotive start-stop power architectures, delivering robust buck-boost regulation in harsh environments while meeting stringent AEC-Q100 and functional safety requirements.
FAQ
What is the maximum output current of the TPS55165QPWPRQ1 at 5 V with 2.3-V input?
The TPS55165QPWPRQ1 delivers 0.4 A at 5 V output when input voltage is 2.3 V - sufficient to maintain microcontroller operation and CAN communication during deep battery cranking events. This rating assumes DCR ≤ 40 mΩ inductor and proper thermal layout per TI's SLVSD46A datasheet Section 11.
How does the TPS55165QPWPRQ1 select between 5-V and 12-V output voltages?
The TPS55165QPWPRQ1 selects output voltage via the VOS_FB pin: connecting VOS_FB to GND configures 5-V output, while connecting it to VREG configures 12-V output. No external resistors are needed - this hardware-selectable dual fixed output eliminates trimming components and improves production yield.
Does the TPS55165QPWPRQ1 support spread-spectrum operation, and how is it enabled?
Yes, the TPS55165QPWPRQ1 supports spread-spectrum modulation to reduce EMI peaks. It is enabled by leaving the SS_EN pin floating (internal pullup active); disabling requires pulling SS_EN low. This feature is confirmed in TI's SLVSD46A datasheet Sections 1 and 5, and applies specifically to the TPS55165-Q1 variant.
What thermal performance can be expected from the TPS55165QPWPRQ1 in its HTSSOP package?
The TPS55165QPWPRQ1 in HTSSOP-20 PowerPAD™ achieves RθJA = 35.4°C/W. With 1-A load at 5 V and 12-V input, junction temperature rise is ~35°C above ambient - well within the 150°C max TJ limit. Full derating guidance is provided in Section 7.4 of TI's SLVSD46A datasheet.
Is the TPS55165QPWPRQ1 qualified for functional safety applications?
Yes, the TPS55165QPWPRQ1 is functional safety-capable with documentation available to aid ISO 26262 system design. It includes diagnostic features such as overtemperature shutdown (175°C–210°C), output overvoltage protection (110%–125%), and configurable power-good with delay - all specified in TI's SLVSD46A datasheet Sections 7.12 and 7.13.
TPS55165QPWPRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.6V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V, 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
TPS55165QPWPRQ1 FAQ
1.How can I place an order for TPS55165QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS55165QPWPRQ1 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 TPS55165QPWPRQ1 reliable?
The price and inventory of TPS55165QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS55165QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TPS55165QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS55165QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS55165QPWPRQ1?
TPS55165QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS55165QPWPRQ1 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 TPS55165QPWPRQ1?
For technical support, including TPS55165QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS55165QPWPRQ1 requirements.
6.How does Aetrix verify that TPS55165QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS55165QPWPRQ1 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 TPS55165QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TPS55165QPWPRQ1?
All TPS55165QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS55165QPWPRQ1, 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 TPS55165QPWPRQ1 part is unused and in its original packaging.
Return procedure for TPS55165QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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