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Texas Instruments LM5164DDAT
- Part No.:
- LM5164DDAT
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5164DDAT.pdf
- Description:
- IC REG BUCK ADJ 1A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:872
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Product details
Overview
LM5164DDAT from Texas Instruments is a 100V-input, 1A synchronous buck DC/DC converter with constant-on-time (COT) control, integrated 0.725Ω high-side and 0.34Ω low-side NMOS switches, 10.5µA no-load quiescent current, and operation from –40°C to +150°C junction temperature - designed for industrial battery packs and high-voltage step-down power rails.
For engineers reviewing the LM5164DDAT datasheet, LM5164DDAT pinout, LM5164DDAT application, or LM5164DDAT equivalent, key selection criteria include its 50ns minimum on-time for 48V-to-3.3V direct conversion, CISPR 25 Class 5 EMI compliance, diode emulation mode for light-load efficiency, and SOIC-8 PowerPAD™ package with exposed thermal pad.
Technical Context
The LM5164DDAT implements a voltage-mode COT architecture with input-voltage feedforward to maintain quasi-fixed switching frequency up to 1MHz; on-time is programmable via RRON and inversely proportional to VIN, enabling stable regulation across 6V–100V input range.
It integrates dual NMOS power switches, internal 5V VCC bias regulator with bootstrap diode, open-drain PGOOD with 60mV hysteresis, precision enable/UVLO (1.45V rising threshold), and smart peak/valley current limiting (1.5A peak / 1.2A valley) with automatic foldback during overcurrent events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - supports direct step-down from 48V/72V battery stacks without pre-regulation |
| Output Current | 1A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in industrial systems |
| Quiescent Current | 10.5µA at no load - extends battery life in e-bike/e-scooter standby modes |
| Min On-Time | 50ns - enables high step-down ratios (e.g., 48V → 3.3V at ~7% duty cycle) |
| Switching Frequency | Up to 1MHz - allows compact magnetics and fast transient response |
| Junction Temp Range | –40°C to +150°C - qualified for under-hood automotive and motor drive environments |
| EMI Performance | CISPR 25 Class 5 compliant - meets stringent automotive EMC requirements without added filtering |
Pinout & Package
LM5164DDAT uses an 8-pin SOIC package with PowerPAD™ (DDA), 4.9mm × 6mm body size, 1.27mm pin pitch, and thermally enhanced exposed pad (EP) tied to GND for low RθJA = 43.4°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return for internal circuits and EP connection point for thermal dissipation |
| 2 VIN | Power input | Direct connection to 6V–100V supply; powers high-side switch and internal VCC regulator |
| 3 EN/UVLO | Enable & UVLO input | 1.45V rising threshold enables startup; 1.1V falling threshold initiates shutdown |
| 4 RON | On-time programming | Resistor to GND sets tON; determines switching frequency in CCM via RRON = VOUT × 2500 / FSW |
| 5 FB | Feedback input | Compares output voltage (via resistor divider) to 1.2V internal reference for regulation |
| 6 PGOOD | Power-good indicator | Open-drain output asserts high when VFB is within 1.055V–1.175V window; used for sequencing and fault reporting |
| 7 BST | Bootstrap supply | Connects 2.2nF X7R capacitor to SW to bias high-side gate driver; internal diode recharges it during off-time |
| 8 SW | Switch node | Internal connection between source of HS-FET and drain of LS-FET; drives external inductor |
| EP | Exposed pad | No electrical function; must be soldered to large GND copper area for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual NMOS switches | Eliminates external MOSFETs and Schottky diode - reduces BOM count and layout complexity |
| Diode emulation mode (DEM) | Disables low-side FET at zero inductor current - improves light-load efficiency and prevents reverse conduction |
| Ultra-low IQ architecture | 10.5µA no-load current and 3µA shutdown current - minimizes battery drain in always-on systems |
| Fixed 3ms soft-start | Ensures monotonic VOUT ramp-up into pre-biased loads - avoids output overshoot and inrush stress |
| No loop compensation required | COT control eliminates external RC networks - simplifies design and improves transient response |
Applications
| Industrial Battery Packs | E-Bike & LEV Power Systems |
|---|---|
Use Scenario: Regulating 48V–72V battery stack outputs to 5V/3.3V for MCU, CAN transceiver, and display modules. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 1A at high efficiency across wide input range and temperature extremes. Use Value: 50ns min on-time enables direct 48V→3.3V conversion; 150°C rating ensures reliability in sealed battery enclosures. | Use Scenario: Powering motor controller logic, brake sensors, and Bluetooth modules from e-bike main battery. IC Role / Device Role / Timing Role: High-voltage input DC/DC converter with ultra-low IQ to preserve battery runtime during idle periods. Use Value: 10.5µA no-load current extends standby time; diode emulation maintains >85% efficiency at 10mA load. |
| Motor Drive Auxiliary Supplies | Telecom & PoE Midspan Equipment |
Use Scenario: Generating isolated gate-driver and MCU supplies from 24V/48V bus in BLDC inverter designs. IC Role / Device Role / Timing Role: Robust primary-side buck converter handling voltage dips and EMI noise in noisy motor environments. Use Value: CISPR 25 Class 5 compliance eliminates need for external EMI filters; thermal shutdown with auto-recovery prevents latch-up. | Use Scenario: Providing regulated 12V/5V rails from 48V PoE midspan or telecom rectified inputs. IC Role / Device Role / Timing Role: Wide-input buck regulator supporting both nominal 48V and surge-prone telecom line conditions. Use Value: 100V absolute max rating withstands lightning-induced transients; 1.27mm pin pitch ensures HV creepage clearance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5163DDAR | Same COT architecture but rated for 65V max input; lower RDS(on) (0.65Ω HS / 0.28Ω LS); 750mA output current | Suitable for ≤65V battery systems where 1A is not required; smaller thermal footprint | Select LM5163DDAR when input stays below 65V and lower cost/size is prioritized over 100V margin |
| MAX20006AATP+ | 42V max input; integrated spread-spectrum clocking; 2.2µA shutdown IQ; 2.2A output; 16-pin TQFN | Better suited for automotive infotainment with strict EMI and AEC-Q100 requirements; higher current capability | Choose MAX20006AATP+ for AEC-Q100-compliant designs needing <3µA shutdown IQ and spread-spectrum EMI reduction |
Compared with LM5164DDAT, LM5163DDAR trades 100V robustness for lower RDS(on) and cost in sub-65V systems, while MAX20006AATP+ offers automotive qualification and higher current but lacks 100V capability - making LM5164DDAT uniquely suited for rugged industrial battery and telecom applications demanding full 100V tolerance.
Availability
LM5164DDAT is available at Aetrix Electronics and suitable for industrial battery packs, e-bike power systems, motor drive auxiliary supplies, and telecom midspan equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM5164DDAT 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 over 50 years of innovation in high-reliability power conversion.
The LM5164DDAT belongs to TI's high-voltage DC/DC converter product line, engineered specifically for scalable industrial power supplies and multi-cell battery systems operating up to 100V with minimal external components.
FAQ
What is the maximum input voltage rating for the LM5164DDAT?
The LM5164DDAT has an absolute maximum input voltage rating of 100V, with recommended operating range from 6V to 100V. This enables direct regulation from high-cell-count lithium-ion battery packs (e.g., 13S–20S) and industrial 48V/72V buses without external surge suppression. Operation down to 6V at near-100% duty cycle ensures functionality during brownout conditions.
Does the LM5164DDAT require external compensation components?
No, the LM5164DDAT does not require external loop compensation components due to its constant-on-time (COT) control architecture. The internal feedback comparator and timing circuitry provide inherent stability across the full input and load range. Designers only need to select RRON for frequency setting and the FB resistor divider for output voltage - significantly reducing component count and layout effort compared to voltage-mode controllers.
How does the LM5164DDAT achieve ultra-low quiescent current?
The LM5164DDAT achieves 10.5µA no-load quiescent current through adaptive biasing and diode emulation mode (DEM). At light loads, it disables the low-side FET at zero inductor current and enters ultra-low IQ mode when idle duration exceeds 15µs. Its internal VCC regulator and optimized gate drivers minimize static current draw, while the 3µA shutdown current further extends battery life in always-off states - critical for e-bike and IoT sensor applications.
What package type and thermal characteristics does the LM5164DDAT use?
The LM5164DDAT uses an 8-pin SOIC package with PowerPAD™ (DDA), featuring a 4.9mm × 6mm body, 1.27mm pin pitch, and exposed thermal pad (EP). With RθJA = 43.4°C/W and RθJC(bot) = 3.9°C/W, the EP must be soldered to a large GND copper plane for optimal thermal performance. This package supports 150°C junction operation and provides adequate creepage for high-voltage industrial designs.
Can the LM5164DDAT be used in CISPR 25 Class 5-compliant automotive systems?
Yes, the LM5164DDAT is explicitly designed to meet CISPR 25 Class 5 radiated emissions standards without additional filtering. Its integrated dual NMOS switches, controlled switching edges, and optimized layout guidance (e.g., tight SW loop, BST capacitor placement) enable compliance in automotive battery pack and infotainment auxiliary supply applications - confirmed by TI's published test reports and layout recommendations in the LM5164DDAT datasheet.
LM5164DDAT 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM5164DDAT FAQ
1.How can I place an order for LM5164DDAT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5164DDAT 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 LM5164DDAT reliable?
The price and inventory of LM5164DDAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5164DDAT is usually 5 days.
3.What payment methods are accepted for LM5164DDAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5164DDAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5164DDAT?
LM5164DDAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5164DDAT 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 LM5164DDAT?
For technical support, including LM5164DDAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5164DDAT requirements.
6.How does Aetrix verify that LM5164DDAT is sourced from the original manufacturer or authorized distributors?
All LM5164DDAT 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 LM5164DDAT meets industry standards.
7.What is the process for return or replacement of LM5164DDAT?
All LM5164DDAT units undergo pre-shipment inspection (PSI). If there is an issue with LM5164DDAT, 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 LM5164DDAT part is unused and in its original packaging.
Return procedure for LM5164DDAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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