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Texas Instruments LMR16020PDDAR
- Part No.:
- LMR16020PDDAR
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR16020PDDAR.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
LMR16020PDDAR from Texas Instruments is a 60 V, 2 A synchronous step-down DC-DC converter with integrated high-side MOSFET (155 mΩ typical), 40 µA quiescent current in Sleep-mode, adjustable 200 kHz–2.5 MHz switching frequency, and precision enable input. It delivers stable 0.8–50 V output for automotive battery regulation and industrial power conditioning under wide-input unregulated sources.
For engineers reviewing the LMR16020PDDAR datasheet, LMR16020PDDAR pinout, LMR16020PDDAR application, or LMR16020PDDAR equivalent, key selection criteria include input voltage range (4.3–60 V), thermal performance (RθJC(bot) = 3.8 °C/W), PGOOD flag accuracy (±2% hysteresis), internal compensation, and BOOT capacitor recharge capability supporting up to 97% duty cycle.
Technical Context
The LMR16020PDDAR implements fixed-frequency peak current mode control with slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its Sleep-mode dynamically reduces switching frequency at light load to maintain efficiency while clamping COMP voltage at 400 mV.
It features dual-mode RT/SYNC pin operation: resistor-programmed frequency (200 kHz–2.5 MHz) or external clock synchronization (250 kHz–2.3 MHz), with automatic fallback to resistor mode if sync signal stops. The integrated BOOT refresh circuit enables high-duty-cycle operation by actively pulling SW low when BOOT-to-SW drops below 3.2 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.3 V to 60 V - supports direct connection to 12 V, 24 V, 36 V, and 48 V industrial/automotive batteries without pre-regulation. |
| Output Current | 2 A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in embedded systems. |
| Quiescent Current | 40 µA - enables >1-year battery life in always-on monitoring applications with 100 mAh coin cell. |
| Switching Frequency | 200 kHz–2.5 MHz - allows trade-off between inductor size (higher fSW) and conduction loss (lower fSW). |
| Feedback Reference | 0.750 V ±10 mV - sets output voltage via resistor divider; enables precise 3.3 V or 5 V rails with 1% resistors. |
| Thermal Resistance | RθJC(bot) = 3.8 °C/W - ensures efficient heat transfer from die to PCB ground plane via exposed thermal pad. |
| Protection Features | Thermal shutdown (170 °C), cycle-by-cycle current limit (2.5–3.8 A), UVLO (4.0 V rising), OVP (107% VFB), and PGOOD flag - eliminates need for external supervision circuits. |
Pinout & Package
LMR16020PDDAR uses an 8-pin HSOIC package (4.89 mm × 3.90 mm) with exposed thermal pad (Pin 9) for low-junction-to-board thermal resistance (RθJB = 25.5 °C/W). The package is RoHS-compliant and designed for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (1) | Bootstrap supply | Connects 0.1 µF ceramic capacitor to SW; supplies gate drive voltage for high-side MOSFET during ON time. |
| VIN (2) | Main power input | Bypassed with CIN near pin; path to GND must be short to minimize high-frequency noise coupling. |
| EN (3) | Enable control | Precision threshold (1.2 V typ); internal 1 µA pull-up allows floating-enable; supports adjustable UVLO with resistor divider. |
| RT/SYNC (4) | Frequency control | Dual-function: resistor-to-GND sets fSW, or external clock (250 kHz–2.3 MHz) synchronizes switching via falling edge. |
| FB (5) | Voltage feedback | Compares output divider voltage to 0.75 V reference; high-impedance input minimizes loading error. |
| PGOOD (6) | Power status flag | Open-drain output asserts low when VOUT deviates >±2% from target; requires external 10–100 kΩ pull-up. |
| GND (7) | Signal & power ground | Common return for control logic and power paths; connects to thermal pad for thermal management. |
| SW (8) | Switch node | Drives external inductor; internally connected to high-side MOSFET drain; high dv/dt node requiring careful layout. |
Key Features
| Feature | Design Value |
|---|---|
| Internal compensation | Eliminates need for external compensation network-reduces BOM count and design iteration time. |
| Sleep-mode operation | Maintains 40 µA IQ at light load while preserving regulation; avoids burst-mode noise in sensitive analog circuits. |
| High-duty-cycle support | BOOT refresh circuit sustains ~97% duty cycle during dropout-enables 5 V output from 5.2 V input without external boost assist. |
| Power-good flag | Accurate ±2% hysteresis on PGOOD enables reliable system power sequencing and fault detection without external comparators. |
| Integrated protection | Combines thermal shutdown, overcurrent, UVLO, and OVP-replaces discrete protection ICs in cost-sensitive designs. |
Applications
| Automotive Battery Regulation | Industrial Power Supplies |
|---|---|
Use Scenario: Regulating 12 V or 24 V vehicle battery to 3.3 V for infotainment MCU and CAN transceivers under cold-crank (4.3 V) and load-dump (60 V) conditions. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise, and thermally robust power domain with PGOOD signaling for safe boot sequence. Use Value: 40 µA quiescent current extends battery standby time; 60 V absolute max rating withstands ISO 7637-2 pulse 5a; thermal pad ensures reliability in under-hood temperature cycling. | Use Scenario: Converting 48 V factory bus to 5 V for PLC I/O modules operating in dusty, vibration-prone environments with ambient temperatures up to 85 °C. IC Role / Device Role / Timing Role: Main DC-DC stage delivering regulated 5 V with high efficiency across full load range and immunity to line transients. Use Value: 155 mΩ high-side RDS(on) minimizes conduction loss at 2 A; internal compensation simplifies compliance with IEC 61000-4-5 surge testing layout requirements. |
| Telecom/Datacom Systems | General Purpose Wide Vin Regulation |
Use Scenario: Point-of-load conversion of -48 V telecom supply (via intermediate +5 V rail) to 1.2 V for FPGA core logic in base station radios. IC Role / Device Role / Timing Role: Secondary buck regulator accepting 5 V input to generate tightly regulated low-voltage rail with fast transient response. Use Value: Adjustable 200 kHz–2.5 MHz fSW allows optimization for EMI filtering in dense RF layouts; PGOOD enables FPGA configuration lockstep with power rail stability. | Use Scenario: Universal input adapter powering diverse equipment (test instruments, medical sensors, IoT gateways) from 12–48 V sources with single BOM. IC Role / Device Role / Timing Role: Flexible buck controller supporting multiple output voltages (3.3 V, 5 V, 12 V) via FB resistor changes and programmable fSW. Use Value: 4.3–60 V input range covers all common DC sources; EN pin supports remote on/off and brown-out recovery; RT/SYNC enables system-level clock alignment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14020PDDAR | Same 8-pin HSOIC package, 40 V max input, 2 A output, 45 µA IQ - lower VIN rating limits use in 48 V systems. | Best suited for 12 V/24 V-only applications where 60 V rating is unnecessary; slightly higher IQ increases standby loss. | Select when cost sensitivity outweighs need for 60 V tolerance and board space is constrained to HSOIC-8 footprint. |
| TPS54260DGQR | 60 V input, 2.5 A output, 145 µA IQ, SOIC-8 - higher IQ and no integrated BOOT refresh limits high-duty-cycle performance. | Requires external BOOT diode/capacitor circuit; lacks PGOOD flag and internal soft-start; needs external compensation. | Choose only if higher output current is required and design team has experience managing external compensation and BOOT layout. |
Compared with LMR14020PDDAR and TPS54260DGQR, the LMR16020PDDAR uniquely combines 60 V rating, 40 µA IQ, internal BOOT refresh, and PGOOD in a single HSOIC-8 package-making it optimal for space-constrained, battery-sensitive, and high-reliability wide-VIN applications.
Availability
LMR16020PDDAR is available at Aetrix Electronics and suitable for automotive battery regulation, industrial power supplies, and telecom/datacom systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR16020PDDAR 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 headquartered in Dallas, Texas, designing and manufacturing analog and embedded processing chips for industrial, automotive, and communications markets.
The LMR16020PDDAR belongs to TI's SIMPLE SWITCHER® family of easy-to-use DC-DC regulators, engineered specifically for wide-input industrial and automotive power conversion where reliability, thermal performance, and minimal external components are critical.
FAQ
What is the maximum input voltage the LMR16020PDDAR can safely handle?
The LMR16020PDDAR has an absolute maximum input voltage rating of 65 V, with recommended operating range from 4.3 V to 60 V. Exceeding 60 V continuously risks violating recommended operating conditions, though brief transients up to 65 V are tolerated per absolute maximum ratings. For automotive applications, this supports ISO 7637-2 pulse 5a (load dump) compliance when properly clamped.
Does the LMR16020PDDAR require external compensation components?
No, the LMR16020PDDAR features fully internal compensation, eliminating the need for external Type II or Type III compensation networks. This reduces bill-of-materials count, saves PCB area, and accelerates design validation-particularly beneficial for engineers implementing power rails in space-constrained or high-volume applications.
How does the BOOT capacitor refresh mechanism work in the LMR16020PDDAR?
When the LMR16020PDDAR operates near dropout (e.g., VIN = 5.2 V, VOUT = 5 V), the high-side MOSFET remains on for multiple cycles. If BOOT-to-SW voltage falls below 3.2 V, the device turns off the high-side switch and activates an internal low-side switch to pull SW low, recharging the BOOT capacitor. This enables sustained ~97% duty cycle without external circuitry.
What is the purpose of the RT/SYNC pin on the LMR16020PDDAR?
The RT/SYNC pin on the LMR16020PDDAR serves two modes: (1) connect a resistor to GND to set switching frequency from 200 kHz to 2.5 MHz, or (2) apply an external clock (250 kHz–2.3 MHz) to synchronize switching. The device auto-detects mode based on voltage thresholds and falling-edge detection, enabling flexible EMI management and multi-rail timing alignment.
Can the LMR16020PDDAR be used in battery-powered systems with strict standby current requirements?
Yes-the LMR16020PDDAR draws only 40 µA quiescent current in Sleep-mode and just 1 µA in shutdown, making it ideal for battery-powered systems like remote sensors or portable test equipment. Its precision enable input (1.2 V threshold) and adjustable UVLO allow clean power sequencing and deep-sleep entry without external controllers.
LMR16020PDDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- 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):
- 4.3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 50V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
LMR16020PDDAR FAQ
1.How can I place an order for LMR16020PDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR16020PDDAR 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 LMR16020PDDAR reliable?
The price and inventory of LMR16020PDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR16020PDDAR is usually 5 days.
3.What payment methods are accepted for LMR16020PDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR16020PDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR16020PDDAR?
LMR16020PDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR16020PDDAR 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 LMR16020PDDAR?
For technical support, including LMR16020PDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR16020PDDAR requirements.
6.How does Aetrix verify that LMR16020PDDAR is sourced from the original manufacturer or authorized distributors?
All LMR16020PDDAR 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 LMR16020PDDAR meets industry standards.
7.What is the process for return or replacement of LMR16020PDDAR?
All LMR16020PDDAR units undergo pre-shipment inspection (PSI). If there is an issue with LMR16020PDDAR, 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 LMR16020PDDAR part is unused and in its original packaging.
Return procedure for LMR16020PDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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