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Texas Instruments LM5163DDAR
- Part No.:
- LM5163DDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM5163DDAR.pdf
- Description:
- IC REG BUCK ADJ 500MA 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:2,753
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Product details
Overview
LM5163DDAR from Texas Instruments is a 100V-input, 0.5A 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 over –40°C to +150°C junction temperature - designed for industrial battery packs and high-voltage step-down power rails.
For engineers reviewing the LM5163DDAR datasheet, LM5163DDAR pinout, LM5163DDAR application, or LM5163DDAR equivalent, key selection considerations include its 50ns minimum on-time for 48V-to-12V direct conversion, diode emulation mode for light-load efficiency, open-drain PGOOD indicator, and SOIC-8 PowerPAD™ package with 1.27mm pin pitch for high-voltage isolation.
Technical Context
The LM5163DDAR implements a voltage-mode COT architecture with input-voltage feedforward to maintain quasi-fixed switching frequency up to 1MHz; its programmable on-time (via RRON) scales inversely with VIN to stabilize frequency across 6–100V input range. Internal soft-start is fixed at 3ms, and regulation uses a precision 1.2V reference with ±1.5% tolerance over temperature.
Protection includes cycle-by-cycle peak current limiting (0.75A typ), valley current foldback (0.6A typ), input UVLO with 1.5V enable threshold and 0.45V hysteresis, thermal shutdown at 175°C with 10°C hysteresis, and robust 2kV HBM ESD rating. The integrated bootstrap regulator and internal boot diode support reliable high-side gate drive using only a 2.2nF BST capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 100V - enables direct regulation from 48V/60V industrial buses or ≥10S Li-ion packs without pre-regulation. |
| Output Current | 0.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in ruggedized systems. |
| Quiescent Current | 10.5µA at no load - minimizes battery drain in always-on industrial monitoring or e-bike standby modes. |
| Switching Frequency | Up to 1MHz - allows compact magnetics and fast transient response while meeting CISPR 25 Class 5 EMI limits. |
| Min On-/Off-Time | 50ns each - supports ultra-high step-down ratios (e.g., 48V→3.3V) and near-100% duty cycle during brownout. |
| Feedback Reference | 1.2V ±1.5% - enables precise output voltage setting (e.g., 3.3V, 5V, 12V) with standard resistor dividers. |
| Thermal Range | –40°C to +150°C TJ - qualified for under-hood automotive auxiliary rails, motor drive controllers, and factory-floor equipment. |
Pinout & Package
LM5163DDAR is housed in an 8-pin SOIC package with exposed PowerPAD™ (DDA), measuring 4.9mm × 6mm and featuring 1.27mm pin pitch for high-voltage creepage. The exposed pad (EP) must be soldered to PCB ground plane to achieve RθJB = 16.1°C/W and ensure thermal reliability at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Common return for internal circuits and EP thermal path - must connect directly to large copper pour. |
| 2 VIN | Power input | Supplies high-side switch and internal VCC bias regulator - requires low-inductance connection to 6–100V source. |
| 3 EN/UVLO | Enable & UVLO input | Logic-controlled startup: <1.1V = shutdown, 1.1–1.5V = standby, >1.5V = active - configurable for system sequencing. |
| 4 RON | On-time programming | Resistor-to-GND sets tON; 100kΩ yields ~2.5µs at 24V - determines switching frequency and minimum duty cycle. |
| 5 FB | Voltage feedback | Compares output divider voltage to 1.2V reference - enables accurate regulation of any VOUT ≥1.2V. |
| 6 PGOOD | Power-good indicator | Open-drain output signals valid regulation (±60mV hysteresis) - used for rail sequencing and fault reporting. |
| 7 BST | Bootstrap supply | Connects external 2.2nF X7R capacitor to SW - provides gate drive voltage for integrated high-side NMOS. |
| 8 SW | Switching node | Internal connection between high-side source and low-side drain - routes to inductor; critical for EMI layout. |
Key Features
| Feature | Design Value |
|---|---|
| COT control architecture | Eliminates loop compensation components and ensures stable operation with minimal output capacitance. |
| Integrated dual NMOS switches | 0.725Ω HS + 0.34Ω LS MOSFETs remove need for external Schottky diode and reduce BOM count by ≥3 parts. |
| Diode emulation mode (DEM) | Disables reverse inductor current at light loads - improves efficiency at 1mA output vs. forced-PWM operation. |
| Ultra-low IQ (10.5µA) | Extends battery runtime in always-on applications like remote telemetry nodes or smart e-bike displays. |
| Peak + valley current protection | Dual-level overcurrent detection prevents thermal runaway during short-circuit while maintaining 0.5A steady-state capability. |
Applications
| Industrial Battery Packs | E-Bike/E-Scooter Power Rails |
|---|---|
Use Scenario: Regulating 42–58V nominal battery stacks (≥12S Li-ion) to 12V/5V for display, lighting, and controller logic. IC Role / Device Role / Timing Role: Primary non-isolated buck converter delivering regulated low-voltage rails with high efficiency across wide input transients. Use Value: 50ns min on-time enables direct 48V→12V conversion; 10.5µA IQ preserves battery capacity during parking mode. |
Use Scenario: Powering motor gate drivers, brake sensors, and Bluetooth modules from 36–48V e-bike battery packs. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator with thermal shutdown recovery for intermittent high-current bursts. Use Value: 150°C max junction temperature and integrated current limiting protect against sustained overloads during hill climbs. |
| Motor Drive Auxiliary Supplies | Telecom & PoE Equipment |
Use Scenario: Generating isolated or non-isolated 5V/3.3V supplies for MCU, gate drivers, and current sense amplifiers in BLDC inverters. IC Role / Device Role / Timing Role: Compact, rugged buck stage upstream of isolated DC/DC - handles line surges and 100V transients. Use Value: 100V absolute max input rating and 43.4°C/W θJA allow operation in unregulated 24/48V industrial motor enclosures. |
Use Scenario: Converting 57V PoE++ (IEEE 802.3bt) or telecom -48V (with polarity inversion) to 12V for fan controllers and PHYs. IC Role / Device Role / Timing Role: Input-stage buck converter meeting CISPR 25 Class 5 EMI requirements without added filtering. Use Value: Integrated COT control and optimized layout reduce conducted emissions - avoids costly external EMI chokes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164DDAR | Higher 1A output current, 6–100V input, same DDA package but larger RDS(on) (0.85Ω HS / 0.4Ω LS) and higher 15µA IQ. | Better suited for 12V/1A motor control rails; less optimal for ultra-low-power battery monitoring due to higher IQ. | Select LM5164DDAR when >0.5A load current or higher surge capability is required; LM5163DDAR remains preferred for sub-1mA standby efficiency. |
| MPQ4313-AEC1 | Automotive-grade (AEC-Q100), 4.5–60V input, 1.2A output, 17µA IQ, QFN-10 package - lacks 100V rating and PowerPAD thermal performance. | Targeted at automotive infotainment and ADAS; not rated for industrial 100V surges or 150°C ambient operation. | Choose MPQ4313-AEC1 only for AEC-Q100-compliant designs within 60V input range; LM5163DDAR is mandatory for ≥100V or >125°C environments. |
Compared with LM5164DDAR and MPQ4313-AEC1, the LM5163DDAR uniquely balances 100V operation, 150°C junction rating, and 10.5µA IQ in an industry-standard SOIC PowerPAD™ - making it the only option for cost-sensitive, thermally constrained, high-input-voltage industrial battery systems requiring long-term reliability without derating.
Availability
LM5163DDAR is available at Aetrix Electronics and suitable for industrial battery packs, e-bike power management, motor drive auxiliary supplies, and telecom PoE equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM5163DDAR 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 decades of expertise in high-reliability DC/DC conversion.
The LM5163DDAR belongs to TI's high-voltage buck converter product line, engineered specifically for rugged industrial and transportation applications where wide input range, ultra-low quiescent current, and thermal resilience are non-negotiable design requirements.
FAQ
What is the maximum input voltage rating for the LM5163DDAR?
The LM5163DDAR has an absolute maximum input voltage rating of 100V on the VIN pin, with recommended operating range from 6V to 100V. This allows direct regulation from high-cell-count Li-ion batteries (e.g., 13S–16S), 48V industrial buses, and telecom -48V systems with polarity inversion. Exceeding 100V risks permanent damage per the Absolute Maximum Ratings table in the LM5163DDAR datasheet.
Does the LM5163DDAR require external compensation components?
No, the LM5163DDAR does not require external loop compensation components due to its constant-on-time (COT) control architecture. Stability is achieved through inherent input-voltage feedforward and controlled feedback ripple - eliminating capacitors, resistors, and op-amps typically needed in voltage-mode or current-mode buck regulators. This reduces BOM count and simplifies layout for the LM5163DDAR.
How does the LM5163DDAR achieve ultra-low quiescent current?
The LM5163DDAR achieves 10.5µA no-load IQ through intelligent mode transitions: at light loads, it enters diode emulation mode (DEM), then progresses into ultra-low IQ sleep mode when idle duration exceeds 15µs. In this state, internal bias circuitry is minimized while retaining wake-up capability via EN/UVLO. This behavior is fully specified in the LM5163DDAR electrical characteristics table under IQ-SLEEP1.
Can the LM5163DDAR operate with a 3.3V output?
Yes, the LM5163DDAR can regulate to 3.3V output using the FB pin and a resistor divider. With its 1.2V internal reference, a standard RFB1/RFB2 network (e.g., 448kΩ/49.9kΩ) sets VOUT = 12V; scaling RFB2 to 162kΩ with same RFB1 yields 3.3V. The LM5163DDAR maintains regulation accuracy (±1.5%) and stability down to 3.3V, provided minimum on-time constraints are met at the selected VIN.
What thermal performance can be expected from the LM5163DDAR in SOIC-8 PowerPAD™?
In the LM5163DDAR's DDA package, thermal resistance is characterized as RθJA = 43.4°C/W (JEDEC high-K board), RθJB = 16.1°C/W (board-conducted), and RθJC(bot) = 3.9°C/W (case-to-board). With proper EP soldering to ≥250mm² 2oz copper, the LM5163DDAR sustains 0.5A output at 100°C ambient without derating - verified in TI's LM5163DDAR thermal test reports and layout guidelines.
LM5163DDAR 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LM5163DDAR FAQ
1.How can I place an order for LM5163DDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5163DDAR 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 LM5163DDAR reliable?
The price and inventory of LM5163DDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5163DDAR is usually 5 days.
3.What payment methods are accepted for LM5163DDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5163DDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5163DDAR?
LM5163DDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5163DDAR 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 LM5163DDAR?
For technical support, including LM5163DDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5163DDAR requirements.
6.How does Aetrix verify that LM5163DDAR is sourced from the original manufacturer or authorized distributors?
All LM5163DDAR 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 LM5163DDAR meets industry standards.
7.What is the process for return or replacement of LM5163DDAR?
All LM5163DDAR units undergo pre-shipment inspection (PSI). If there is an issue with LM5163DDAR, 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 LM5163DDAR part is unused and in its original packaging.
Return procedure for LM5163DDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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