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Texas Instruments LM5164QDDATQ1
- Part No.:
- LM5164QDDATQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5164QDDATQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:595
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Product details
Overview
LM5164QDDATQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified synchronous buck DC/DC converter for automotive 48V mild hybrid systems, delivering up to 1A output current with 6V–100V input range, 50ns minimum on-time, and 10.5µA no-load quiescent current. It integrates 0.725Ω high-side and 0.34Ω low-side NMOS switches, operates in constant on-time (COT) mode, and supports diode emulation for light-load efficiency.
For engineers reviewing the LM5164QDDATQ1 datasheet, LM5164QDDATQ1 pinout, LM5164QDDATQ1 application, or LM5164QDDATQ1 equivalent, key selection considerations include ultra-low IQ operation, 100V input surge tolerance, integrated power FETs, AEC-Q100 qualification, and programmable on-time via RON pin for scalable frequency control up to 1MHz.
Technical Context
The LM5164QDDATQ1 employs a constant on-time (COT) control architecture with VIN feedforward to maintain quasi-fixed switching frequency across 6V–100V input, enabling stable regulation during wide input transients. Its 50ns minimum controllable on-time supports direct 48V-to-12V conversion without intermediate stages.
It integrates both high-side and low-side NMOS power switches, eliminating external Schottky diodes, and features peak/valley current limiting (1.5A/1.2A), internal 1.2V reference, fixed 3ms soft-start, and open-drain PGOOD for sequencing and fault reporting - all within an 8-pin SO PowerPAD™ package rated for –40°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - enables direct step-down from 48V battery without pre-regulation or external surge suppression |
| Output Current | 1A continuous - sufficient for ECU bias rails, HVAC compressor controllers, and PTC heater logic supplies |
| Quiescent Current | 10.5µA at no load - preserves battery life in always-on automotive modules during extended sleep modes |
| Switching Frequency | Up to 1MHz - allows compact magnetics and fast transient response in space-constrained ECUs |
| Minimum On-Time | 50ns - supports >10:1 step-down ratios (e.g., 48V → 3.3V) without requiring cascaded converters |
| Junction Temp Range | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain applications |
| Integrated FETs | 0.725Ω HS / 0.34Ω LS NMOS - eliminates external rectifier, reduces BOM count, and improves thermal performance |
Pinout & Package
The LM5164QDDATQ1 is housed in an 8-pin SO PowerPAD™ (DDA) package measuring 4.9mm × 6mm with 1.27mm pin pitch - optimized for high-voltage spacing and thermal dissipation via exposed pad soldered to GND plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary ground return for internal circuits and thermal path to PCB copper plane via EP |
| VIN (Pin 2) | Power input | Direct connection to 6V–100V supply; powers high-side FET and internal VCC regulator |
| EN/UVLO (Pin 3) | Enable & UVLO control | Three-threshold precision enable: shutdown (<1.1V), standby (1.1–1.5V), active (>1.5V) |
| RON (Pin 4) | On-time programming | Resistor-to-GND sets COT on-time; determines switching frequency in CCM (e.g., 75kΩ ≈ 333kHz @12V) |
| FB (Pin 5) | Feedback input | Compares output voltage divider ratio against 1.2V internal reference for regulation |
| PGOOD (Pin 6) | Open-drain status | Signals valid output (1.08V–1.14V FB window); used for rail sequencing and fault detection |
| BST (Pin 7) | Bootstrap supply | Connects to SW via 2.2nF X7R capacitor; powers high-side gate driver during on-time |
| SW (Pin 8) | Switching node | Internal connection between HS FET source and LS FET drain; interfaces with power inductor |
| EP (Exposed Pad) | Thermal pad | No electrical function; must be soldered to GND plane for thermal resistance of 3.9°C/W (bottom) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures from –40°C to +125°C and junction up to +150°C |
| Ultra-low IQ operation | 10.5µA no-load input current enables >1-year battery hold-up in always-on vehicle modules |
| Diode emulation mode (DEM) | Disables low-side FET at zero inductor current to eliminate reverse conduction loss and boost light-load efficiency |
| Integrated bootstrap diode & VCC regulator | Eliminates external bias components; 5V internal VCC powers gate drivers and logic from VIN directly |
| Smart peak/valley current limiting | 1.5A peak limit triggers foldback to 1.2A valley limit - protects against short-circuit while maintaining safe average current |
| No loop compensation required | COT architecture with inherent stability eliminates external compensation network, reducing design time and component count |
Applications
| Automotive 48V Mild Hybrid ECU Bias Supply | Automotive HVAC Compressor Control |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in 48V-based engine control units where input may dip to 6V during cranking. IC Role / Device Role / Timing Role: Primary step-down regulator converting 48V battery to 3.3V/5V logic rails with monotonic start-up into pre-biased loads. Use Value: 50ns min on-time enables direct 48V→3.3V conversion; 10.5µA IQ prevents parasitic drain during 30-day key-off storage. | Use Scenario: Supplies gate drivers and MCU for variable-speed HVAC compressor inverters in electric vehicles. IC Role / Device Role / Timing Role: High-reliability 12V bias rail generator tolerant to load dump transients up to 100V. Use Value: Integrated 0.725Ω/0.34Ω FETs deliver 1A with <1W conduction loss; thermal shutdown with auto-recovery ensures fault resilience. |
| Automotive PTC Heater Logic Supply | Industrial 24V/48V DC/DC Converter |
Use Scenario: Provides isolated 5V control power for solid-state relays and temperature sensors in high-power cabin heating modules. IC Role / Device Role / Timing Role: Input-survivable regulator operating from raw 48V bus with UVLO hysteresis to reject noise-induced false turn-on. Use Value: 1.4V–1.55V EN threshold with 100mV hysteresis ensures clean startup during battery recovery after cold crank. | Use Scenario: Used in telecom PoE-powered equipment and industrial PLCs requiring robust 24V-to-5V conversion with wide input tolerance. IC Role / Device Role / Timing Role: Wide-input buck controller supporting legacy 24V systems and emerging 48V architectures without redesign. Use Value: 6V–100V range covers 24V nominal ±20% and 48V nominal ±10%, plus surge margins - single BOM for multiple platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5163QDDAQ1 | Lower 65V max input, 0.5A output, same COT architecture and pinout but reduced voltage/current rating | Suitable only for 24V automotive systems or non-surge-prone 48V subsystems | Select when 65V input margin suffices and lower cost or smaller footprint is prioritized over 100V surge capability |
| MPQ4333GQ-AEC1 | Monolithic 100V/1.2A buck with similar IQ (12µA), but uses current-mode control and requires external compensation | Lacks integrated PGOOD and has different EN/UVLO thresholds; not drop-in compatible | Choose when current-mode loop tuning is preferred or when MPQ4333GQ-AEC1's 1.2A rating and QFN package better suit thermal layout constraints |
Compared with LM5164QDDATQ1, LM5163QDDAQ1 offers cost savings at the expense of 35V input headroom and 50% output current, while MPQ4333GQ-AEC1 provides higher current and alternate control topology but demands additional compensation components and lacks identical pin compatibility.
Availability
LM5164QDDATQ1 is available at Aetrix Electronics and suitable for automotive 48V mild hybrid ECU bias supplies, HVAC compressor control, PTC heater logic supplies, and industrial 24V/48V DC/DC converters requiring stable component supply across long production lifecycles.
Supply support for LM5164QDDATQ1 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 power management technologies with deep automotive qualification expertise.
The LM5164-Q1 product line delivers high-voltage, ultra-low-IQ synchronous buck regulators engineered specifically for AEC-Q100-compliant 48V mild hybrid, battery management, and high-reliability industrial power systems.
FAQ
What is the maximum input voltage rating for the LM5164QDDATQ1?
The LM5164QDDATQ1 supports an absolute maximum input voltage of 100V on the VIN pin, with recommended operating range from 6V to 100V. This rating enables direct use in automotive 48V systems subject to load dump transients per ISO 7637-2, eliminating need for external TVS clamping in many designs. The device maintains regulation down to 6V at near-100% duty cycle, making it suitable for cranking conditions.
Does the LM5164QDDATQ1 require external compensation components?
No, the LM5164QDDATQ1 does not require external compensation components due to its constant on-time (COT) control architecture. Stability is achieved inherently through feedback ripple injection methods (e.g., RESR, CFF, or RC ramp), and the internal 1.2V reference and comparator eliminate need for external error amplifier or compensation network - reducing BOM count and simplifying layout.
How does the LM5164QDDATQ1 achieve ultra-low quiescent current?
The LM5164QDDATQ1 achieves 10.5µA no-load IQ by entering ultra-low IQ mode when load current drops below ~1mA: it disables switching, turns off internal regulators except essential bias circuits, and maintains only core monitoring functions. In shutdown mode (EN/UVLO <1.1V), IQ drops further to 3µA. This behavior is confirmed across –40°C to +125°C ambient per AEC-Q100 testing.
What package type and thermal characteristics does the LM5164QDDATQ1 use?
The LM5164QDDATQ1 uses an 8-pin SO PowerPAD™ (DDA) package with 4.9mm × 6mm footprint and 1.27mm pin pitch. Its thermal metrics include RθJC(bot) = 3.9°C/W (junction-to-board via exposed pad), RθJA = 43.4°C/W (junction-to-ambient), and RθJB = 16.1°C/W - enabling 1A operation with minimal heatsinking when the EP is soldered to ≥2cm² GND copper area.
Can the LM5164QDDATQ1 drive a 12V output from a 48V input in a single stage?
Yes, the LM5164QDDATQ1 can directly regulate 48V to 12V in a single stage thanks to its 50ns minimum controllable on-time and ability to operate at >80% duty cycle. At 48V input and 12V output, the required on-time is ~625ns (calculated via tON = RON × 2.5 / VIN), well above the 50ns limit. Efficiency exceeds 92% at 1A load per typical curves, confirming viable single-stage implementation.
LM5164QDDATQ1 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:
- 1A
- Frequency - Switching:
- Up to 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM5164QDDATQ1 FAQ
1.How can I place an order for LM5164QDDATQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5164QDDATQ1 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 LM5164QDDATQ1 reliable?
The price and inventory of LM5164QDDATQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5164QDDATQ1 is usually 5 days.
3.What payment methods are accepted for LM5164QDDATQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5164QDDATQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5164QDDATQ1?
LM5164QDDATQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5164QDDATQ1 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 LM5164QDDATQ1?
For technical support, including LM5164QDDATQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5164QDDATQ1 requirements.
6.How does Aetrix verify that LM5164QDDATQ1 is sourced from the original manufacturer or authorized distributors?
All LM5164QDDATQ1 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 LM5164QDDATQ1 meets industry standards.
7.What is the process for return or replacement of LM5164QDDATQ1?
All LM5164QDDATQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5164QDDATQ1, 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 LM5164QDDATQ1 part is unused and in its original packaging.
Return procedure for LM5164QDDATQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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