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Texas Instruments LM5160QPWPQ1
- Part No.:
- LM5160QPWPQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5160QPWPQ1.pdf
- Description:
- IC REG BCK FLYBACK ADJ 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:252
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Product details
Overview
LM5160QPWPQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 65-V input, 2-A synchronous buck/Fly-Buck™ DC/DC converter with integrated high-side and low-side MOSFETs, adaptive constant on-time control, ±1% feedback reference, and FPWM-selectable CCM/DCM operation - used in IGBT gate drive bias supplies and isolated low-power automotive DC/DC converters.
For engineers reviewing the LM5160QPWPQ1 datasheet, LM5160QPWPQ1 pinout, LM5160QPWPQ1 application, or LM5160QPWPQ1 equivalent, key selection considerations include its 4.5–65 V input range, 14-pin HTSSOP package with thermal pad, programmable soft-start, inherent peak current limiting, and support for Fly-Buck™ topology via FPWM-controlled forced CCM mode.
Technical Context
The LM5160QPWPQ1 implements adaptive constant on-time (COT) control with VIN-inverse on-time programming via RON, enabling stable regulation without external loop compensation and fast transient response across wide input and load ranges. Its internal error amplifier maintains ±1% output voltage accuracy over –40°C to 125°C junction temperature.
It integrates dual N-channel MOSFETs (RDS(ON) = 0.29 Ω HS / 0.13 Ω LS), a 7.5-V VCC bias regulator (30-mA current limit), BST bootstrap gate drive with UVLO (2.93–3.6 V), and intelligent current limit with VIN- and VFB-dependent off-timer (16–39.8 µs). FPWM pin configures CCM-only operation for multi-output Fly-Buck™ or DCM for light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 65 V - supports 12 V, 24 V, and 48 V automotive/industrial bus rails without pre-regulation. |
| Output Current | 2 A maximum - sufficient for IGBT gate drivers, sensor power, and auxiliary rails in ADAS modules. |
| Feedback Reference | ±1% over –40°C to 125°C - ensures tight output regulation across full automotive temperature range. |
| Switching Frequency | Adjustable up to 1 MHz via RON resistor - enables optimization of size vs. EMI in space-constrained ECUs. |
| Protection Features | Peak current limit, VCC/BST UVLO, thermal shutdown with 20°C hysteresis, and adjustable EN/UVLO - provides robust fault handling in safety-critical systems. |
| EMI Compliance | Meets CISPR 25 Class 5 - validated for automotive infotainment and body electronics without added filtering. |
| Package | 14-pin HTSSOP (4.4 mm × 5.0 mm, 0.65-mm pitch) with exposed thermal pad - enables high-power density with efficient PCB heat sinking. |
Pinout & Package
LM5160QPWPQ1 is housed in a 14-pin HTSSOP (PWP) package with 0.65-mm pitch and an exposed thermal pad connected to AGND for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, AGND | Analog Ground | Reference ground for internal control circuits; must be star-connected to minimize noise coupling into FB/SS paths. |
| 2, PGND | Power Ground | Return path for high-current synchronous rectifier FET; separate from AGND to avoid ground bounce in switching node. |
| 3, VIN | Main Input Supply | Primary power input (4.5–65 V); connects to bulk capacitor and RON resistor for on-time programming. |
| 4, EN/UVLO | Enable & Input UVLO | Logic-enable input with precision 1.24 V threshold and user-adjustable hysteresis via external resistors. |
| 5, RON | On-Time Programming | Resistor-to-VIN sets switch on-time inversely proportional to VIN - determines operating frequency and stability. |
| 6, SS | Soft-Start Control | Capacitor-to-AGND sets monotonic output ramp time; also serves as error amp non-inverting input during startup. |
| 8, FPWM | Forced PWM Mode Select | Logic-high (VCC) forces CCM for Fly-Buck™; logic-low (AGND) enables DCM for light-load efficiency. |
| 9, FB | Voltage Feedback Input | Compares output divider voltage to 2-V internal reference; bias current <100 nA minimizes divider error. |
| 10, VCC | Bias Regulator Output | 7.5-V internal supply for gate drivers and logic; bypassed with ≥1 µF ceramic capacitor for transient stability. |
| 11, BST | Bootstrap Capacitor Node | Connects to SW via 0.1 µF capacitor; supplies high-side gate drive; includes UVLO (2.93 V) for safe turn-on. |
| 12–13, SW | Switch Node | Drain of HS FET / source of LS FET; high dV/dt node requiring minimized trace area and guard ring. |
| 7, 14, NC | No Connection | Unbonded pins; must remain unconnected per TI design guidelines to prevent parasitic coupling. |
| EP, Thermal Pad | Exposed Pad | Internally connected to AGND; requires solid copper pour and multiple thermal vias for junction-to-board thermal resistance of 19.6 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to 125°C ambient operation with HBM ±2 kV / CDM ±750 V ESD robustness - meets automotive reliability requirements. |
| Integrated HS/LS MOSFETs | Eliminates need for external Schottky diode or discrete FETs - reduces BOM count, layout area, and conduction losses in buck and Fly-Buck™ topologies. |
| Adaptive constant on-time control | Enables stable regulation without external compensation components and delivers <10 µs load transient recovery - critical for dynamic automotive loads. |
| FPWM-configurable CCM/DCM | CCM mode ensures fixed-frequency operation and predictable EMI for multi-rail Fly-Buck™ designs; DCM improves light-load efficiency by >15% at 10 mA. |
| Prebiased start-up capability | Allows controlled startup into precharged output capacitors without reverse current or overshoot - essential for hot-swap and redundant power systems. |
| Inherent protection suite | Includes valley/peak current limiting, VCC/BST UVLO, thermal shutdown with hysteresis, and adjustable EN/UVLO - reduces need for external supervision ICs. |
Applications
| Automotive Body Control Module (BCM) | IGBT Gate Drive Bias Supply |
|---|---|
Use Scenario: Powering microcontrollers, CAN transceivers, and LED drivers in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 5-V or 3.3-V buck regulator converting 12-V battery rail with high line/load regulation. Use Value: ±1% reference and adaptive COT ensure stable MCU operation during cold-crank (4.5 V) and load-dump (65 V) events. | Use Scenario: Generating isolated ±15-V bias for high-side IGBTs in electric power steering (EPS) inverters. IC Role / Device Role / Timing Role: Fly-Buck™ controller using coupled inductor to derive isolated secondary outputs without optocouplers. Use Value: FPWM pin forces CCM operation, ensuring consistent duty cycle and predictable transformer volt-second balance across load range. |
| ADAS Camera Power Supply | Industrial PLC Auxiliary Rail |
Use Scenario: Providing clean, low-noise 1.8-V or 2.5-V core power to image sensors and ISP processors in surround-view cameras. IC Role / Device Role / Timing Role: Synchronous buck regulator with soft-start and prebias capability to avoid reset glitches during camera boot. Use Value: Programmable soft-start (via SS capacitor) limits inrush current to <500 mA, preventing brownout of shared 12-V supply. | Use Scenario: Generating 5-V or 12-V auxiliary power from 24-V or 48-V industrial bus in programmable logic controllers. IC Role / Device Role / Timing Role: High-input-voltage buck converter with thermal shutdown and current limiting for harsh factory environments. Use Value: 150°C max junction temperature rating and 39.3 °C/W RθJA enable operation at 70°C ambient without derating in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5161QPWPRQ1 | Higher 100-V input rating, same 2-A output, identical pinout and feature set - adds wider VIN margin for 72-V truck systems. | Supports higher input surges (e.g., ISO 7637-2 Pulse 5a) but requires revalidation of RON and output filter for 100-V operation. | Select when system-level surge testing exceeds 65 V or future-proofing for 72-V architectures is required. |
| TPS54260DGQR | 60-V input, 2.5-A output, current-mode control with external compensation - lacks Fly-Buck™ support and AEC-Q100 qualification. | Suitable for non-automotive industrial buck only; no FPWM pin or integrated BST diode - requires external bootstrap diode. | Choose for cost-sensitive non-automotive applications needing higher output current and design flexibility via external loop compensation. |
Compared with LM5161QPWPRQ1, LM5160QPWPQ1 offers tighter VIN range fit for standard 12/24/48-V automotive systems and lower BOM cost; versus TPS54260DGQR, it delivers automotive qualification, Fly-Buck™ capability, and simplified layout - at the expense of current-mode design flexibility.
Availability
LM5160QPWPQ1 is available at Aetrix Electronics and suitable for automotive body control modules, IGBT gate drive bias supplies, and ADAS camera power systems requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for LM5160QPWPQ1 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 specializing in analog, embedded processing, and power management ICs, with leadership in automotive-grade power solutions.
The LM5160QPWPQ1 belongs to TI's automotive-qualified DC/DC converter product line, designed specifically for high-reliability, wide-input-voltage power conversion in engine control units, ADAS, and electrified vehicle subsystems.
FAQ
What is the maximum recommended input voltage for LM5160QPWPQ1?
The absolute maximum input voltage for LM5160QPWPQ1 is 70 V, but the recommended operating range is 4.5 V to 65 V. Operation above 65 V risks exceeding safe SOA limits under transient conditions such as load dump. TI specifies 65 V as the upper limit for continuous operation per the datasheet's Recommended Operating Conditions table - staying within this ensures reliable lifetime performance in automotive applications where LM5160QPWPQ1 is deployed.
Does LM5160QPWPQ1 support isolated Fly-Buck™ topology, and how is it configured?
Yes, LM5160QPWPQ1 supports isolated Fly-Buck™ operation by connecting the FPWM pin to VCC to force continuous conduction mode (CCM), enabling stable multi-output regulation using a coupled inductor. This configuration eliminates diode emulation and ensures consistent duty cycle control required for secondary-side voltage regulation. The LM5160QPWPQ1 datasheet includes a dedicated Fly-Buck™ application circuit and design guidelines - confirming its validated use case beyond basic buck conversion.
What is the purpose of the RON pin on LM5160QPWPQ1, and how is it used?
The RON pin on LM5160QPWPQ1 programs the adaptive on-time duration by connecting a resistor between RON and VIN. This resistor sets the switching frequency inversely proportional to input voltage - maintaining near-constant frequency across input variations. For example, a 100-kΩ resistor yields ~520 ns on-time at 24 V, targeting ~500 kHz operation. The LM5160QPWPQ1 datasheet provides Equation 4 to calculate RON for target frequency, and specifies a minimum on-time of 150 ns to ensure proper timing integrity.
How does LM5160QPWPQ1 handle thermal protection, and what is the shutdown threshold?
LM5160QPWPQ1 incorporates thermal shutdown with a 175°C junction threshold and 20°C hysteresis, meaning it resumes operation only after cooling to 155°C. This protection is inherent and does not require external components. The device uses die-temperature sensing to disable switching and enter thermal shutdown, safeguarding against sustained overload or poor heatsinking. The LM5160QPWPQ1's 14-pin HTSSOP package with exposed thermal pad achieves 19.6 °C/W RθJB - enabling effective thermal management when properly mounted per TI layout guidelines.
Can LM5160QPWPQ1 start up into a precharged output capacitor, and what feature enables this?
Yes, LM5160QPWPQ1 supports prebiased start-up, allowing safe startup into an output capacitor already charged to the target voltage. This is enabled by internal circuitry that disables reverse current flow through the low-side FET during initial soft-start, preventing output voltage collapse or excessive inrush. The LM5160QPWPQ1 datasheet explicitly lists "Prebiased Start-Up" as a key feature and confirms functionality across the full –40°C to 125°C temperature range - making it suitable for hot-swap and redundant power applications where LM5160QPWPQ1 is used.
LM5160QPWPQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Buck, Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 60V
- Current - Output:
- 2A
- Frequency - Switching:
- Adj to 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-HTSSOP
LM5160QPWPQ1 FAQ
1.How can I place an order for LM5160QPWPQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5160QPWPQ1 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 LM5160QPWPQ1 reliable?
The price and inventory of LM5160QPWPQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5160QPWPQ1 is usually 5 days.
3.What payment methods are accepted for LM5160QPWPQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5160QPWPQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5160QPWPQ1?
LM5160QPWPQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5160QPWPQ1 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 LM5160QPWPQ1?
For technical support, including LM5160QPWPQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5160QPWPQ1 requirements.
6.How does Aetrix verify that LM5160QPWPQ1 is sourced from the original manufacturer or authorized distributors?
All LM5160QPWPQ1 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 LM5160QPWPQ1 meets industry standards.
7.What is the process for return or replacement of LM5160QPWPQ1?
All LM5160QPWPQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5160QPWPQ1, 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 LM5160QPWPQ1 part is unused and in its original packaging.
Return procedure for LM5160QPWPQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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