My Inquiry
My Account
Texas Instruments LM5164QDDARQ1
- Part No.:
- LM5164QDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5164QDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,887
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM5164QDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering up to 1A output current with 6V–100V input range, 1.2V feedback reference, and 10.5µA no-load quiescent current-designed for 48V mild hybrid ECU bias supplies requiring high step-down ratio and ultra-low IQ operation.
For engineers reviewing the LM5164QDDARQ1 datasheet, LM5164QDDARQ1 pinout, LM5164QDDARQ1 application, or LM5164QDDARQ1 equivalent, key selection criteria include its 50ns minimum on-time, integrated 0.725Ω high-side and 0.34Ω low-side MOSFETs, COT control architecture, diode emulation mode, and SO PowerPAD™ package with exposed thermal pad.
Technical Context
The LM5164QDDARQ1 employs a constant-on-time (COT) control architecture with input-voltage feedforward to maintain quasi-fixed switching frequency up to 1MHz, programmable via RRON resistor. Its 50ns minimum controllable on-time enables direct 48V-to-12V conversion without intermediate stages.
It integrates both high-side and low-side N-channel MOSFETs, eliminating external Schottky diodes, and features peak/valley current limiting (1.5A/1.2A), internal 3ms soft-start, precision enable/UVLO (1.5V enable threshold), and open-drain PGOOD for sequencing and fault reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports direct regulation from 48V battery rails and withstands automotive load-dump transients without external suppression. |
| Output Current | 1A continuous - sufficient for biasing ECUs, HVAC controllers, and PTC heater drivers in Grade 1 (–40°C to +125°C ambient) automotive systems. |
| Quiescent Current | 10.5µA at no load - minimizes standby battery drain in always-on vehicle subsystems such as telematics and ADAS sensors. |
| Switching Frequency | Up to 1MHz - enables compact magnetics and reduces EMI filtering requirements while maintaining light-load efficiency via diode emulation mode. |
| Feedback Reference | 1.2V ±1.5% - enables precise output voltage setting (e.g., 3.3V, 5V, 12V) using standard resistor dividers with minimal temperature drift. |
| On-Time Programmability | 50ns to 10µs via RRON - allows optimization of switching frequency across input voltage range while preserving minimum duty cycle for high-step-down operation. |
| Thermal Protection | 175°C shutdown with 10°C hysteresis - ensures robust operation under overload or poor heatsinking conditions with automatic recovery. |
Pinout & Package
LM5164QDDARQ1 is housed in an 8-pin SO PowerPAD™ (DDA) package with 1.27mm pin pitch and exposed thermal pad (EP) for enhanced thermal dissipation. The package measures 4.9mm × 6mm and is optimized for high-voltage spacing and PCB-level thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary ground return for internal circuits; must be connected to large copper pour and tied to EP for optimal thermal performance. |
| VIN (Pin 2) | Power input | High-voltage supply input (6–100V) for high-side FET and internal VCC regulator; requires low-inductance path to bulk capacitor. |
| EN/UVLO (Pin 3) | Enable & UVLO control | Programmable enable threshold (1.5V rising) and undervoltage lockout; enables system-level power sequencing and brownout protection. |
| RON (Pin 4) | On-time programming | Resistor-to-GND sets COT on-time; determines switching frequency and minimum controllable duty cycle across input range. |
| FB (Pin 5) | Feedback input | Compares output voltage divider to 1.2V internal reference; supports remote sensing and ripple injection for COT stability. |
| PGOOD (Pin 6) | Power-good indicator | Open-drain output signaling valid regulation (±60mV hysteresis); used for rail sequencing, fault flagging, and microcontroller wake-up. |
| BST (Pin 7) | Bootstrap supply | Supplies gate drive for high-side FET; requires 2.2nF X7R ceramic capacitor between BST and SW for reliable bootstrapping. |
| SW (Pin 8) | Switching node | Internal connection point of high-side source and low-side drain; connects directly to power inductor; critical for EMI layout and thermal routing. |
| EP | Exposed thermal pad | No electrical function; must be soldered to GND plane to achieve RθJB = 16.1°C/W and sustain 1A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | 0.725Ω HS and 0.34Ω LS NFETs eliminate external diode and reduce BOM count, PCB area, and conduction losses. |
| Ultra-Low Quiescent Current | 10.5µA active sleep current enables >1-year battery life in always-on automotive modules powered from 12V or 48V batteries. |
| Diode Emulation Mode (DEM) | Prevents reverse inductor current and enables pulse-skipping at light loads, sustaining >85% efficiency down to 1mA output current. |
| 50ns Minimum On-Time | Supports 48V-to-3.3V (14.5:1) direct conversion without cascaded regulators, reducing system cost and failure points. |
| AEC-Q100 Grade 1 Qualification | Validated for –40°C to +125°C ambient operation with full characterization of electrical parameters, ESD (HBM ±2kV), and thermal performance. |
Applications
| Automotive 48V Mild Hybrid ECU Bias Supply | Automotive HVAC Compressor Control |
|---|---|
Use Scenario: Powers microcontrollers, CAN transceivers, and sensor interfaces in 48V-based engine control units where input voltage varies from 36V (discharged) to 58V (regenerative braking). IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable 3.3V or 5V rail with ultra-low IQ to extend battery hold-up time during ignition-off states. Use Value: Eliminates need for pre-regulator stages; 10.5µA IQ prevents parasitic drain on 48V auxiliary battery over weeks of vehicle dormancy. | Use Scenario: Supplies logic and gate-drive circuitry for HVAC compressor inverters in electric vehicles, operating continuously during cabin climate conditioning. IC Role / Device Role / Timing Role: High-reliability DC/DC converter delivering 12V at 1A to motor control ICs and isolated gate drivers under wide ambient temperature swings. Use Value: 100V absolute max rating withstands ISO 7637-2 pulse 5a transients; thermal shutdown with auto-recovery maintains uptime during thermal stress events. |
| Automotive DC/DC Converter for PTC Heaters | Industrial 24V/48V System Bias Supply |
Use Scenario: Generates isolated control power for solid-state relays and temperature sensors in high-power PTC heater modules drawing up to 10kW from 48V bus. IC Role / Device Role / Timing Role: Input-stage buck converter stepping 48V down to 12V for downstream isolated DC/DC modules and analog front-ends. Use Value: 50ns min on-time enables single-stage conversion; integrated valley current limit (1.2A) provides robust short-circuit protection during heater element faults. | Use Scenario: Provides regulated 5V/3.3V bias for PLC I/O modules, industrial gateways, and PoE-powered edge devices operating from 24V or 48V factory power rails. IC Role / Device Role / Timing Role: Wide-input buck regulator supporting legacy 24V infrastructure and emerging 48V data center architectures with identical bill-of-material. Use Value: Pin-compatible operation across 6–100V input eliminates redesign when upgrading from 24V to 48V systems; SO PowerPAD™ package simplifies thermal design on dense industrial PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5163QDDARQ1 | Lower 65V max input, 0.5A output, same COT architecture and pinout but reduced voltage/current capability. | Suitable for 24V-only automotive body electronics; not rated for 48V MHEV battery transients. | Select when input never exceeds 65V and load current ≤0.5A; offers lower cost and smaller solution size. |
| TPS54160AQRTARQ1 | Non-synchronous, 60V max input, 1.5A output, current-mode control, higher 85µA IQ. | Lacks diode emulation and synchronous rectification; less efficient at light loads and unsuitable for ultra-low IQ applications. | Choose only if synchronous rectification is unnecessary and 60V input ceiling is acceptable; requires external Schottky diode. |
Compared with LM5164QDDARQ1, LM5163QDDARQ1 trades 100V/1A capability for cost reduction in lower-voltage systems, while TPS54160AQRTARQ1 sacrifices light-load efficiency and transient robustness for higher peak current and simpler compensation-neither is pin-compatible nor drop-in.
Availability
LM5164QDDARQ1 is available at Aetrix Electronics and suitable for automotive 48V mild hybrid ECU bias supplies, HVAC compressor control, and PTC heater power management requiring stable component supply across extended temperature and high-reliability automotive production cycles.
Supply support for LM5164QDDARQ1 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 expertise in automotive-grade reliability and functional safety.
The LM5164-Q1 product line delivers high-voltage synchronous buck converters optimized for AEC-Q100 Grade 1 automotive applications including 48V mild hybrids, battery management, and high-reliability industrial power systems.
FAQ
What is the maximum input voltage rating for the LM5164QDDARQ1?
The LM5164QDDARQ1 has an absolute maximum input voltage rating of 100V, with recommended operating range from 6V to 100V. This enables direct regulation from 48V nominal battery systems-including transient surges up to 80V per ISO 7637-2-without external surge suppression components. The device remains operational down to 6V at near-100% duty cycle, making it ideal for automotive start-stop and regenerative braking scenarios where input voltage dips occur.
Does the LM5164QDDARQ1 require external compensation components?
No, the LM5164QDDARQ1 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 controlled feedback ripple injection (e.g., RESR, CFF, or RC ramp methods), as detailed in TI's AN-1481. This reduces BOM count, PCB area, and design iteration time while ensuring robust transient response across the full 6V–100V input range.
How does the LM5164QDDARQ1 achieve ultra-low quiescent current?
The LM5164QDDARQ1 achieves 10.5µA no-load IQ through intelligent power-state management: in light-load conditions, it enters diode emulation mode (DEM), then transitions into ultra-low IQ sleep mode when idle duration exceeds 15µs. During sleep mode, non-critical blocks are gated, and the internal VCC regulator operates in low-power state-verified across –40°C to +125°C ambient. Shutdown IQ is further reduced to 3µA when EN/UVLO < 1.1V.
What is the purpose of the RON pin on the LM5164QDDARQ1?
The RON pin on the LM5164QDDARQ1 programs the constant on-time (COT) duration via an external resistor to GND. This resistor inversely scales the on-time with input voltage (tON = RRON / VIN × 2.5), enabling nearly fixed-frequency operation across the 6V–100V input range. It directly determines minimum achievable on-time (≥50ns), maximum switching frequency (≤1MHz), and step-down ratio capability-critical for 48V-to-low-voltage conversion without cascaded stages.
Can the LM5164QDDARQ1 drive a 12V output from a 48V input in a single stage?
Yes, the LM5164QDDARQ1 can directly regulate 48V down to 12V in a single stage due to its 50ns minimum controllable on-time and ability to operate at >90% duty cycle when needed. At 48V input and 12V output, the required duty cycle is 25%, well within the device's operational range. The COT architecture ensures stable regulation without frequency foldback, and integrated MOSFETs eliminate external diode losses-reducing solution size and improving efficiency over multi-stage alternatives.
LM5164QDDARQ1 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
LM5164QDDARQ1 FAQ
1.How can I place an order for LM5164QDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5164QDDARQ1 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 LM5164QDDARQ1 reliable?
The price and inventory of LM5164QDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5164QDDARQ1 is usually 5 days.
3.What payment methods are accepted for LM5164QDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5164QDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5164QDDARQ1?
LM5164QDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5164QDDARQ1 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 LM5164QDDARQ1?
For technical support, including LM5164QDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5164QDDARQ1 requirements.
6.How does Aetrix verify that LM5164QDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LM5164QDDARQ1 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 LM5164QDDARQ1 meets industry standards.
7.What is the process for return or replacement of LM5164QDDARQ1?
All LM5164QDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5164QDDARQ1, 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 LM5164QDDARQ1 part is unused and in its original packaging.
Return procedure for LM5164QDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM5164QDDARQ1 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…
