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Texas Instruments LM5160QPWPTQ1
- Part No.:
- LM5160QPWPTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM5160QPWPTQ1.pdf
- Description:
- IC REG BCK FLYBACK ADJ 14HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:295
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Product details
Overview
LM5160QPWPTQ1 from Texas Instruments is an AEC-Q100 Grade 1 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 automotive power supplies and IGBT gate drive biasing.
For engineers reviewing the LM5160QPWPTQ1 datasheet, LM5160QPWPTQ1 pinout, LM5160QPWPTQ1 application, or LM5160QPWPTQ1 equivalent, key selection criteria include wide 4.5–65 V input range, HTSSOP-14 thermal performance (RθJA = 39.3°C/W), programmable soft-start, inherent peak current limiting, and Fly-Buck™ multi-output isolation capability.
Technical Context
The LM5160QPWPTQ1 implements adaptive constant on-time (COT) control with VIN-inversely proportional on-time, enabling stable regulation without external loop compensation and delivering fast transient response across 4.5–65 V input. Its dual-mode operation-selectable via FPWM pin-supports forced PWM (CCM) for multi-output Fly-Buck™ topologies or diode-emulation DCM for light-load efficiency.
Internal protection includes adjustable EN/UVLO (1.24 V threshold), VCC UVLO (3.98 V), thermal shutdown (175°C), and intelligent current limit with VIN- and VFB-dependent off-timer (16–39.8 µs). The integrated 7.5-V VCC regulator powers gate drivers and logic, with 30-mA current limit and internal BST recharge diode.
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 - enables direct powering of microcontrollers, sensors, and gate drivers in compact layouts. |
| Feedback Reference | ±1% over –40°C to +125°C - ensures tight output voltage regulation across full automotive temperature range. |
| Switching Frequency | Adjustable up to 1 MHz via RON - allows optimization of size vs. EMI; maintains near-constant frequency across line/load variations. |
| Protection Features | Peak current limit (2.5 A typ), thermal shutdown (175°C), VCC UVLO, EN/UVLO with hysteresis - enables robust operation in harsh environments without external supervision. |
| Package Thermal Resistance | RθJA = 39.3°C/W (HTSSOP-14) - supports 2 A continuous output at ambient ≤85°C with standard PCB copper area. |
| ESD Rating | HBM ±2000 V, CDM ±750 V - meets AEC-Q100 Grade 1 requirements for automotive assembly and field reliability. |
Pinout & Package
LM5160QPWPTQ1 is housed in a 14-pin HTSSOP package (4.40 mm × 5.00 mm, 0.65-mm pitch) with exposed thermal pad connected to AGND for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AGND | Analog ground reference | Return for internal control circuitry; must be isolated from PGND except at single-point connection to minimize noise coupling. |
| 2 PGND | Power ground return | Source node for low-side FET; requires low-inductance path to SW and input/output capacitors. |
| 3 VIN | Main input supply | 4.5–65 V input rail; connects to high-side FET drain and VCC regulator input. |
| 4 EN/UVLO | Enable & input UVLO input | Logic-enable with precision 1.24 V threshold and user-adjustable hysteresis via resistor divider. |
| 5 RON | On-time programming | Resistor from VIN sets switching frequency; inverse VIN dependence enables stable fSW across wide input range. |
| 6 SS | Soft-start control | Capacitor-connected node charged by 10-µA current source; controls monotonic VOUT ramp and limits inrush. |
| 8 FPWM | Forced PWM mode select | Connect to VCC for CCM (Fly-Buck™ compatible); connect to AGND for DCM (light-load efficiency). |
| 9 FB | Voltage feedback input | Compares output voltage (via RFB1/RFB2) to 2 V reference; determines on-time initiation timing. |
| 10 VCC | Bias regulator output | 7.5 V internal supply for gate drivers and logic; bypassed with ≥1 µF ceramic capacitor. |
| 11 BST | Bootstrap capacitor node | Connects to SW via 0.1 µF capacitor; provides gate drive voltage for high-side N-channel FET. |
| 12,13 SW | Switch node | Drain of high-side FET / source of low-side FET; critical high-dV/dt node requiring minimized loop area. |
| 7,14 NC | No connection | Unbonded pins; must remain unconnected per TI design guidelines. |
| EP | Exposed thermal pad | Internally connected to AGND; soldered to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive constant on-time control | Eliminates need for external compensation network while maintaining fast load transient response (<10 µs recovery) and stable regulation across 4.5–65 V input. |
| Integrated high- and low-side MOSFETs | Reduces BOM count and layout complexity; eliminates external Schottky diode and associated losses in buck topology. |
| FPWM-selectable conduction mode | Enables seamless transition between CCM (for Fly-Buck™ isolation or ripple-sensitive loads) and DCM (for >90% efficiency at <100 mA loads). |
| Pre-biased start-up support | Allows safe startup into pre-charged output capacitors without reverse current flow or output voltage overshoot. |
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, including HBM/CDM ESD robustness and extended lifetime reliability testing. |
Applications
| Automotive Infotainment Power Supply | IGBT Gate Drive Bias Supply |
|---|---|
Use Scenario: Powers 5 V/3.3 V rails for MCU, display controller, and audio codec in head-unit systems supplied from 12 V battery with cold-crank dips to 4.5 V. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated, low-noise, high-efficiency DC/DC conversion with fast transient response to handle burst-mode processor loads. Use Value: Maintains stable output during 4.5–65 V input transients; ±1% reference and adaptive COT ensure <50 mV load regulation error across 0–2 A. | Use Scenario: Generates isolated ±15 V bias for high-side IGBT gate drivers in EV traction inverters using Fly-Buck™ topology with coupled inductor. IC Role / Device Role / Timing Role: Primary-side controller in isolated Fly-Buck™ configuration, where FPWM = VCC forces CCM for predictable cross-regulation and reduced secondary-side ripple. Use Value: Eliminates optocoupler feedback loop; inherent current limiting protects gate driver during short-circuit events without external sensing. |
| Industrial PLC I/O Module Supply | Telecom PoE-PD Auxiliary Rail |
Use Scenario: Supplies 3.3 V/1.8 V rails for digital I/O and analog front-end in DIN-rail mounted PLC modules powered from 24 V DC industrial bus. IC Role / Device Role / Timing Role: Synchronous buck converter operating in CCM with programmable soft-start to meet IEC 61000-4-5 surge immunity requirements. Use Value: HTSSOP thermal pad and RθJA = 39.3°C/W enable 2 A output at 70°C ambient without heatsink; meets CISPR 25 Class 5 EMI limits. | Use Scenario: Provides auxiliary 5 V rail for monitoring/control circuitry in IEEE 802.3at PoE-powered devices receiving up to 57 V from PSE. IC Role / Device Role / Timing Role: High-input-voltage buck regulator accepting full PoE voltage range (37–57 V) with built-in UVLO hysteresis to prevent brownout oscillation. Use Value: Wide 4.5–65 V input range covers entire PoE specification; integrated current limit prevents damage during cable fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5161QPWPTQ1 | Higher 100-V input rating; identical pinout and feature set; 1.5-A rated output current. | Suitable for 48 V telecom or 72 V industrial systems where input surges exceed 65 V. | Select when input voltage may exceed 65 V; retains same layout and firmware interface but derates max load to 1.5 A. |
| TPS54260DGQR | 60-V input, 2.5-A output; current-mode control (not COT); requires external compensation; no FPWM pin or Fly-Buck™ support. | Better suited for non-isolated, high-precision regulation where loop bandwidth tuning is required. | Choose when design demands adjustable loop compensation or higher output current; not drop-in due to different control architecture and pin functions. |
Compared with LM5161QPWPTQ1, the LM5160QPWPTQ1 offers higher output current (2 A vs. 1.5 A) at lower max input voltage (65 V vs. 100 V); compared with TPS54260DGQR, it delivers faster transient response and Fly-Buck™ capability without compensation components, but lacks current-mode flexibility.
Availability
LM5160QPWPTQ1 is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and telecom PoE-powered devices requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM5160QPWPTQ1 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 ICs, with deep expertise in automotive-grade reliability and system-level power design.
The LM5160QPWPTQ1 belongs to TI's automotive-qualified DC/DC converter product line, engineered specifically for high-voltage, high-reliability buck and isolated Fly-Buck™ applications in vehicles and industrial equipment.
FAQ
What is the maximum input voltage rating for the LM5160QPWPTQ1?
The LM5160QPWPTQ1 has an absolute maximum input voltage rating of 70 V, with recommended operating range from 4.5 V to 65 V. Operation beyond 65 V is not advised for sustained use, as electrical characteristics are only guaranteed within the recommended range. The device's internal high-side FET and protection circuits are designed for reliable operation up to 65 V under all specified conditions, including transients defined in ISO 7637-2.
Does the LM5160QPWPTQ1 support isolated Fly-Buck™ topology?
Yes, the LM5160QPWPTQ1 explicitly supports Fly-Buck™ isolated DC/DC conversion. When the FPWM pin is tied to VCC, the device operates in forced continuous conduction mode (CCM), which is required for stable cross-regulation in multi-output Fly-Buck™ designs using a coupled inductor. This capability is documented in TI's LM5160-Q1 datasheet Section 2 (Applications) and Section 8.2 (Typical Applications).
What is the purpose of the RON pin on the LM5160QPWPTQ1?
RON on the LM5160QPWPTQ1 sets the switch on-time via an external resistor connected between VIN and RON. Because on-time varies inversely with input voltage, this resistor determines the approximate switching frequency - e.g., a 100-kΩ resistor yields ~500 kHz at VIN = 24 V. The RON pin enables frequency adjustment without changing compensation, preserving the adaptive COT architecture's stability and transient benefits.
Can the LM5160QPWPTQ1 start up into a pre-biased output?
Yes, the LM5160QPWPTQ1 supports pre-biased start-up. Its control architecture prevents reverse current flow during startup by disabling the low-side FET until the FB voltage rises above the SS voltage. This avoids output voltage overshoot and potential damage to downstream circuitry when the output capacitor is already charged - a critical feature for hot-swap and redundant power systems.
What thermal performance can be expected from the LM5160QPWPTQ1 in HTSSOP package?
The LM5160QPWPTQ1 in 14-pin HTSSOP (PWP) package has a junction-to-ambient thermal resistance (RθJA) of 39.3°C/W with standard 2-layer PCB layout (2 oz Cu, 1 in² thermal pad). At 2 A load and 24 V input, typical power dissipation is ~0.8 W, resulting in ~31°C junction-to-ambient rise - well within the –40°C to +125°C operating range. For higher ambient, use of the exposed thermal pad connected to AGND is mandatory.
LM5160QPWPTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LM5160QPWPTQ1 FAQ
1.How can I place an order for LM5160QPWPTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5160QPWPTQ1 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 LM5160QPWPTQ1 reliable?
The price and inventory of LM5160QPWPTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5160QPWPTQ1 is usually 5 days.
3.What payment methods are accepted for LM5160QPWPTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5160QPWPTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5160QPWPTQ1?
LM5160QPWPTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5160QPWPTQ1 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 LM5160QPWPTQ1?
For technical support, including LM5160QPWPTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5160QPWPTQ1 requirements.
6.How does Aetrix verify that LM5160QPWPTQ1 is sourced from the original manufacturer or authorized distributors?
All LM5160QPWPTQ1 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 LM5160QPWPTQ1 meets industry standards.
7.What is the process for return or replacement of LM5160QPWPTQ1?
All LM5160QPWPTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5160QPWPTQ1, 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 LM5160QPWPTQ1 part is unused and in its original packaging.
Return procedure for LM5160QPWPTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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