My Inquiry
My Account
Texas Instruments LM5163HQDDARQ1
- Part No.:
- LM5163HQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5163HQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:1,679
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5163HQDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter with integrated 0.725-Ω high-side and 0.34-Ω low-side NFETs, delivering up to 0.5 A at output voltages adjustable via resistor divider, operating from 6 V to 100 V input, featuring 10.5-µA no-load quiescent current and 165°C maximum junction temperature for high-temperature ADAS and mild-hybrid ECU bias supplies.
For engineers reviewing the LM5163HQDDARQ1 datasheet, LM5163HQDDARQ1 pinout, LM5163HQDDARQ1 application, or LM5163HQDDARQ1 equivalent, key selection considerations include its COT control architecture with programmable on-time (50 ns min), integrated bootstrap diode and VCC regulator, thermal shutdown at 175°C with 10°C hysteresis, and compliance with CISPR 25 Class 5 EMI requirements.
Technical Context
The LM5163HQDDARQ1 implements constant-on-time (COT) control with input-voltage feedforward, enabling quasi-fixed switching frequency up to 1 MHz while maintaining stability across wide VIN ranges. Its on-time is set by external RRON and inversely proportional to VIN, supporting large step-down ratios such as direct 48-V-to-12-V conversion.
It integrates dual NFETs, eliminating external Schottky diodes, and features diode emulation mode (DEM) for high light-load efficiency plus valley current foldback protection triggered after peak current limit detection - ensuring robust short-circuit response without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6 V to 100 V - eliminates need for external surge suppression in automotive battery systems with load dump transients. |
| Max Output Current | 0.5 A DC - sufficient for bias rails in camera modules, radar ECUs, and gate drivers in 48-V mild hybrids. |
| Quiescent Current | 10.5 µA at no load - preserves battery life during vehicle sleep modes without compromising startup readiness. |
| Junction Temp Range | –40°C to +165°C - enables operation in high-ambient environments like powertrain compartments with reduced coolant use. |
| Min On-Time | 50 ns - supports ultra-high step-down ratios (e.g., 48 V → 3.3 V) without requiring intermediate regulation stages. |
| Thermal Shutdown | 175°C with 10°C hysteresis - provides fail-safe recovery after sustained overload or poor heatsinking conditions. |
| Feedback Reference | 1.2 V ±1.5% over temperature - allows precise output voltage setting using standard resistor tolerances (1% RFB1/RFB2). |
Pinout & Package
LM5163HQDDARQ1 is housed in an 8-pin SO PowerPAD™ package (DDA), measuring 4.89 mm × 3.90 mm with 1.27-mm pin pitch - optimized for high-voltage spacing and thermal performance via exposed pad soldered to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for internal circuits and thermal conduction to PCB copper plane via exposed pad (EP). |
| VIN (Pin 2) | Power input | Connects directly to 6–100 V source; powers internal VCC regulator and high-side FET; requires low-impedance layout. |
| EN/UVLO (Pin 3) | Enable & UVLO control | Programmable threshold (1.45 V rising) enables system-level sequencing and input undervoltage lockout. |
| RON (Pin 4) | On-time programming | Resistor to GND sets minimum on-time; determines switching frequency in CCM (e.g., 105 kΩ ≈ 286 kHz @ 12 V out). |
| FB (Pin 5) | Feedback input | Compares divided output voltage against 1.2 V reference; enables adjustable VOUT using RFB1/RFB2 divider network. |
| PGOOD (Pin 6) | Open-drain status indicator | Signals regulated output (±3% window); requires external pullup (10–100 kΩ) for rail sequencing and fault reporting. |
| BST (Pin 7) | Bootstrap supply | Requires 2.2-nF X7R ceramic capacitor to SW; powers high-side gate driver; internal diode recharges BST during low-SW phase. |
| SW (Pin 8) | Switching node | Internal connection between high-side drain and low-side source; connects to inductor; critical for EMI layout and thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| COT Control Architecture | Enables fast transient response and eliminates loop compensation components - reduces BOM count and design cycle time. |
| Integrated Dual NFETs | 0.725-Ω HS and 0.34-Ω LS switches eliminate external Schottky diode and reduce solution size by >30% vs discrete designs. |
| Diode Emulation Mode | Disables reverse inductor current at light loads, improving efficiency above 90% at 1 mA output and extending battery standby time. |
| CISPR 25 Class 5 Compliance | Validated EMI performance enables direct integration into infotainment and ADAS modules without added filtering. |
| 165°C Junction Rating | Supports placement near heat sources (e.g., inverters, motors) without derating - enables compact, high-power-density layouts. |
Applications
| Automotive 48-V Mild Hybrid Bias Supply | HEV/EV DC/DC Converter |
|---|---|
|
Use Scenario: Providing stable 5-V or 3.3-V bias to MCU, CAN transceivers, and sensors in 48-V starter-generator systems. IC Role / Device Role / Timing Role: Primary step-down regulator converting nominal 48-V bus to low-voltage logic rails with minimal external components. Use Value: 50 ns minimum on-time enables single-stage conversion from 48 V to 3.3 V, reducing system cost and board area versus multi-stage solutions. |
Use Scenario: Generating isolated or non-isolated auxiliary power for traction inverter gate drivers and cooling pump controllers. IC Role / Device Role / Timing Role: High-reliability buck controller operating continuously under elevated ambient temperatures (>105°C) in engine bay locations. Use Value: 165°C junction rating ensures uninterrupted operation when placed adjacent to IGBT modules, avoiding thermal throttling or shutdown. |
| High-Temperature ADAS Camera Module | Automotive Powertrain Control Unit |
|
Use Scenario: Powering image sensor, ISP, and SerDes in front-facing camera housings exposed to solar loading and engine heat. IC Role / Device Role / Timing Role: Compact, low-noise DC/DC regulator supplying clean 1.8-V or 2.8-V rails with <10.5-µA IQ to minimize self-heating. Use Value: Ultra-low quiescent current prevents thermal runaway in sealed enclosures, extending component lifetime beyond 15 years MTBF. |
Use Scenario: Delivering 12-V or 5-V bias to microcontrollers and analog front-ends in transmission control units located near exhaust manifolds. IC Role / Device Role / Timing Role: Robust buck converter surviving repeated thermal cycling from –40°C cold crank to +165°C peak junction during full-load operation. Use Value: Thermal shutdown with automatic recovery maintains functional safety without requiring system-level watchdog intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | Higher 1-A output current, wider 3–100 V input range, but 25-µA IQ and lower 150°C max junction temperature. | Better suited for higher-current ADAS domain controllers; less optimal for ultra-low-power sleep-mode applications. | Select LM5164QDDARQ1 when load exceeds 0.5 A or input may dip below 6 V (e.g., cold-crank scenarios). |
| TPS54160AQDGQRQ1 | Non-synchronous design with external diode, 1.5-A rating, 3.5–60 V input, 115-µA IQ, and 125°C max junction temperature. | Lacks integrated low-side FET and thermal headroom for high-ambient placements; requires more external components. | Choose TPS54160AQDGQRQ1 only if cost sensitivity outweighs efficiency, size, and thermal performance requirements. |
Compared with LM5163HQDDARQ1, LM5164QDDARQ1 offers higher current capacity at the expense of quiescent current and thermal margin, while TPS54160AQDGQRQ1 trades integration and efficiency for broader input flexibility and lower unit cost - making LM5163HQDDARQ1 optimal for space-constrained, high-temperature, low-IQ automotive subsystems.
Availability
LM5163HQDDARQ1 is available at Aetrix Electronics and suitable for automotive 48-V mild hybrid ECU bias supplies, HEV/EV DC/DC converters, and high-temperature ADAS applications requiring stable component supply across extended product lifecycles.
Supply support for LM5163HQDDARQ1 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 and embedded processing technologies, with leadership in automotive-grade power management ICs and broad portfolio coverage from silicon to system-level solutions.
The LM5163H-Q1 belongs to TI's automotive-qualified buck converter family designed specifically for high-input-voltage, high-temperature, low-quiescent-current applications in ADAS, powertrain, and electrified vehicle subsystems.
FAQ
What is the maximum junction temperature specification for the LM5163HQDDARQ1?
The LM5163HQDDARQ1 is rated for a maximum junction temperature of +165°C, with thermal shutdown activated at 175°C and 10°C hysteresis. This rating enables reliable operation in high-ambient environments such as engine compartments and ADAS camera housings where traditional buck converters would require derating or forced cooling. The LM5163HQDDARQ1 maintains full functionality across its entire –40°C to +165°C junction range without performance degradation.
Does the LM5163HQDDARQ1 require external compensation components?
No, the LM5163HQDDARQ1 uses a constant-on-time (COT) control architecture that eliminates the need for external loop compensation components such as type-II or type-III networks. Stability is maintained through inherent input-voltage feedforward and controlled feedback ripple generation - simplifying design, reducing bill-of-materials count, and minimizing PCB footprint. The LM5163HQDDARQ1 achieves this while supporting wide input voltage ranges and fast transient response.
How does the LM5163HQDDARQ1 achieve ultra-low quiescent current?
The LM5163HQDDARQ1 achieves 10.5-µA no-load quiescent current through intelligent power-state management: it transitions into ultra-low IQ mode when idle duration exceeds 15 µs, disabling non-essential circuitry while retaining wake-up capability via EN/UVLO. This behavior is confirmed across temperature and input voltage ranges per Section 6.5 of the datasheet. The LM5163HQDDARQ1 sustains this low IQ without sacrificing startup speed or regulation accuracy.
Can the LM5163HQDDARQ1 operate with input voltages below 6 V?
No, the LM5163HQDDARQ1 has a specified minimum input voltage of 6 V under recommended operating conditions. While it can sustain nearly 100% duty cycle operation down to 6 V, operation below this threshold risks improper startup, loss of regulation, or undefined behavior. For sub-6-V applications such as cold-crank scenarios, TI recommends the LM5164QDDARQ1, which supports inputs as low as 3 V. The LM5163HQDDARQ1 is not characterized or guaranteed for reliable operation below 6 V.
What package type and thermal characteristics does the LM5163HQDDARQ1 use?
The LM5163HQDDARQ1 uses an 8-pin SO PowerPAD™ (DDA) package with 4.89 mm × 3.90 mm body size and 1.27-mm pin pitch. Its thermal metrics include RθJA = 43.4°C/W (JEDEC high-K board), RθJC(bot) = 3.9°C/W, and ΨJB = 16.3°C/W - confirming efficient heat transfer to the PCB ground plane via the exposed pad. This package enables high-voltage creepage and robust thermal performance essential for automotive under-hood deployment. The LM5163HQDDARQ1 leverages this construction to sustain 165°C junction temperature reliably.
LM5163HQDDARQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (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):
- 6V
- Voltage - Input (Max):
- 100V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 100V
- Current - Output:
- 500mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 165°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM5163HQDDARQ1 FAQ
1.How can I place an order for LM5163HQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5163HQDDARQ1 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 LM5163HQDDARQ1 reliable?
The price and inventory of LM5163HQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5163HQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LM5163HQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5163HQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5163HQDDARQ1?
LM5163HQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5163HQDDARQ1 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 LM5163HQDDARQ1?
For technical support, including LM5163HQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5163HQDDARQ1 requirements.
6.How does Aetrix verify that LM5163HQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LM5163HQDDARQ1 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 LM5163HQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LM5163HQDDARQ1?
All LM5163HQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5163HQDDARQ1, 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 LM5163HQDDARQ1 part is unused and in its original packaging.
Return procedure for LM5163HQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5163HQDDARQ1 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…
