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Texas Instruments LM5165YQDGSRQ1
- Part No.:
- LM5165YQDGSRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LM5165YQDGSRQ1.pdf
- Description:
- IC REG BUCK 3.3V 150MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,618
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Product details
Overview
LM5165YQDGSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 150 mA at fixed 3.3 V output, operating from 3 V to 65 V input with 10.5 µA no-load quiescent current and integrated 2-Ω PMOS high-side and 1-Ω NMOS low-side switches. It supports PFM/COT mode selection, 900-µs internal soft start, and meets CISPR 22 EMI standards for vehicle infotainment power rails.
For engineers reviewing the LM5165YQDGSRQ1 datasheet, LM5165YQDGSRQ1 pinout, LM5165YQDGSRQ1 application, or LM5165YQDGSRQ1 equivalent, key selection criteria include ultra-low IQ for always-on systems, 100% duty-cycle capability for low-dropout operation in cold-crank scenarios, adjustable current limit for optimized inductor sizing, and AEC-Q100 qualification for under-hood deployment.
Technical Context
The LM5165YQDGSRQ1 implements a constant-on-time (COT) or pulse-frequency-modulation (PFM) control architecture without requiring external loop compensation. Its integrated high-side PMOS switch enables 100% duty cycle operation, eliminating bootstrap capacitor needs and supporting VIN-to-VOUT dropout as low as 300 mV at light load.
Internal voltage reference accuracy is ±1% (1.223 V), EN threshold is 1.212 V ±68 mV hysteresis, and PGOOD asserts when FB reaches 94% of regulation threshold. Thermal shutdown activates at 170°C with 10°C hysteresis, and junction temperature range spans –40°C to 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 65 V - supports automotive battery transients including cold-crank (4.5 V) and load-dump (60 V) |
| Output Voltage | Fixed 3.3 V ±2.1% - factory-trimmed for automotive-grade accuracy across –40°C to 125°C ambient |
| No-Load IQ | 10.5 µA - enables >1-year battery standby in telematics modules powered from 12 V lead-acid |
| Max Output Current | 150 mA - sustained DC load at 3.3 V with thermal derating per RθJA = 47.7°C/W (VSON package) |
| Switching Architecture | Selectable PFM or COT - PFM maximizes light-load efficiency; COT delivers near-constant frequency and fast transient response |
| EMI Compliance | CISPR 22 Class B - achieved via active slew rate control and integrated MOSFETs reducing layout-sensitive ringing |
| Protection Features | Thermal shutdown (170°C), monotonic start-up into prebiased outputs, precision enable with UVLO hysteresis, and cycle-by-cycle current limiting |
Pinout & Package
LM5165YQDGSRQ1 is housed in a 10-pin VSON package (DRC) with 3.0 mm × 3.0 mm body size and 0.5-mm pitch, featuring an exposed thermal pad connected to GND for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Drain connection of integrated PMOS high-side and NMOS low-side switches; ties directly to inductor switch node |
| VIN | Input supply rail | Primary power input for high-side FET and internal bias LDO; requires low-ESR ceramic input capacitor placed adjacent |
| ILIM | Current limit programming | Four preset peak current thresholds (48–240 mA) selected by resistor to GND; shorted for max setting |
| SS | Soft-start timing | Disables (100-kΩ to GND), fixes at 900 µs (open), or programs externally via capacitor; ensures monotonic VOUT ramp |
| RT | Mode selection & on-time | Short to GND selects PFM; resistor to GND sets COT frequency - e.g., 133 kΩ yields ~230 kHz |
| PGOOD | Power-good flag | Open-drain NFET output pulled high externally; asserts high when VOUT reaches 94% of 3.3 V target |
| EN | Enable/UVLO input | Active-high logic with 1.212 V threshold and 68 mV hysteresis; enables sequencing and programmable input undervoltage lockout |
| VOUT | Fixed output feedback | Internally connected to 3.3 V divider; no external resistors required - differs from FB pin on adjustable variants |
| HYS | UVLO hysteresis control | Drain of internal NFET; resistor from HYS to EN divider sets UVLO hysteresis voltage independently |
| GND | Ground return | Power and signal ground reference; must be tied to exposed thermal pad and system PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PMOS/NMOS switches | Eliminates external MOSFETs and rectifier diode; 2 Ω / 1 Ω RDS(on) enables compact 3.3 V bias rail with <150 mV dropout at 100 mA |
| 100% duty-cycle operation | Enables VIN-to-VOUT regulation down to 3.3 V even when input sags to 3.6 V during cold-crank, avoiding brownout |
| Programmable current limit | Four discrete ILIM settings allow precise inductor selection - e.g., 120 mA limit supports 220 µH inductor for 150 mA max design |
| Active slew rate control | Reduces high-frequency EMI emissions without external snubbers, simplifying compliance testing for automotive EMC requirements |
| No loop compensation required | PFM and COT architectures inherently stable - removes 3–5 external compensation components and associated layout sensitivity |
Applications
| Automotive Infotainment Power | ADAS Camera Bias Supply |
|---|---|
Use Scenario: Powering USB-C PD controllers and display interface ICs in head units with variable battery input (6–16 V) and strict quiescent current limits. IC Role / Device Role / Timing Role: Primary 3.3 V synchronous buck regulator supplying core logic and I/O rails; operates in PFM mode during standby to maintain <15 µA system IQ. Use Value: 10.5 µA no-load IQ extends battery backup time beyond 400 days; AEC-Q100 Grade 1 rating ensures reliability at 125°C ambient under dash. | Use Scenario: Generating clean 3.3 V for image sensor and serializer ICs in rear-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering regulated 3.3 V with monotonic start-up into prebiased outputs during hot-plug events. Use Value: 100% duty cycle sustains regulation during 4.5 V cold-crank; thermal shutdown with 10°C hysteresis prevents latch-up in sealed enclosures. |
| Telematics Control Unit (TCU) | Vehicle-to-Cloud Gateway |
Use Scenario: Providing always-on 3.3 V bias to cellular modem and GNSS receiver in LTE-based TCUs with wake-on-RF capability. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator enabling >1-year battery life in disconnected state; uses EN pin for controlled wake/sleep sequencing. Use Value: Precision enable threshold (1.212 V ±68 mV) allows accurate UVLO configuration for 12 V battery monitoring; PGOOD confirms valid rail before modem initialization. | Use Scenario: Powering CAN FD transceivers and secure boot microcontrollers in OTA update gateways requiring robust EMI immunity. IC Role / Device Role / Timing Role: EMI-optimized buck converter meeting CISPR 22 Class B with active slew control; supplies isolated domain with tight 3.3 V tolerance. Use Value: Integrated MOSFETs and no-external-compensation design reduce radiated emissions by >6 dBµV vs discrete solutions; 3.3 V ±2.1% output ensures reliable flash programming voltage margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164YQDGSRQ1 | Same pinout, 1-A output, higher IQ (25 µA), wider 3–100 V input range | Supports higher current loads (e.g., multi-rail PMICs); less suitable for ultra-low-power always-on nodes | Select when >150 mA output or >65 V transient tolerance is required; retains same PCB layout |
| TPS63060-Q1 | Buck-boost topology, 2.5–5.5 V output, 1-A output, 17 µA IQ, different pinout | Regulates through battery voltage collapse (down to 1.8 V input); not drop-in due to topology and pin assignment | Choose for applications needing VIN < VOUT capability (e.g., 3.3 V rail from single-cell Li-ion); requires full schematic and layout revision |
Compared with LM5165YQDGSRQ1, LM5164YQDGSRQ1 offers higher current and input voltage headroom but sacrifices ultra-low IQ, while TPS63060-Q1 provides buck-boost flexibility at the cost of pin compatibility and added complexity - making LM5165YQDGSRQ1 optimal for fixed 3.3 V, low-IQ, high-input-voltage automotive bias rails.
Availability
LM5165YQDGSRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply with AEC-Q100 qualification, extended temperature support, and long-term production continuity.
Supply support for LM5165YQDGSRQ1 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 and embedded processing technologies, with decades of automotive-grade power management innovation.
The LM5165-Q1 product line delivers ultra-low-IQ, wide-input synchronous buck converters designed specifically for automotive subsystems where battery longevity, transient resilience, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum continuous output current of the LM5165YQDGSRQ1?
The LM5165YQDGSRQ1 delivers up to 150 mA of continuous DC output current at 3.3 V in COT mode, with thermal derating based on PCB copper area and ambient temperature. At 25°C ambient with 2-layer board and 2-in² 2-oz copper, full 150 mA is sustainable; above 85°C ambient, output current reduces linearly per thermal resistance (RθJA = 47.7°C/W). The LM5165YQDGSRQ1 datasheet specifies 150 mA as the maximum rated output under recommended conditions.
Does the LM5165YQDGSRQ1 require external compensation components?
No, the LM5165YQDGSRQ1 does not require external compensation components. Its PFM and COT control architectures are inherently stable across input voltage and load ranges, eliminating the need for loop compensation networks. This reduces bill-of-materials count by up to five passive components and removes layout-sensitive feedback trace routing - a key advantage confirmed in Section 7.1 of the LM5165YQDGSRQ1 datasheet and validated in typical application circuits.
How is the current limit configured on the LM5165YQDGSRQ1?
The LM5165YQDGSRQ1 current limit is configured via the ILIM pin: connecting a resistor from ILIM to GND selects one of four preset peak current thresholds (48 mA, 60 mA, 120 mA, or 240 mA). Shorting ILIM to GND sets the maximum limit (240 mA for VSON package). Resistor values are specified in the LM5165YQDGSRQ1 Electrical Characteristics table (Section 6.5), and the setting directly determines inductor saturation current selection - critical for optimizing size and efficiency in automotive designs.
What package type is used for the LM5165YQDGSRQ1?
The LM5165YQDGSRQ1 uses a 10-pin VSON package (DRC) with 3.0 mm × 3.0 mm body size, 0.5-mm pin pitch, and an exposed thermal pad. This package is distinct from the VSSOP-10 (DGS) variant and is optimized for thermal performance in space-constrained automotive modules. The exposed pad must be soldered to a GND plane for effective heat dissipation, and thermal metrics (RθJA = 47.7°C/W) are published in Section 6.4 of the LM5165YQDGSRQ1 datasheet.
Is the LM5165YQDGSRQ1 qualified for automotive applications?
Yes, the LM5165YQDGSRQ1 is AEC-Q100 qualified for automotive applications at Grade 1 (–40°C to +125°C ambient temperature), with HBM ESD rating of ±2 kV and CDM rating of ±500 V (pins 1, 5, 6, 10: ±750 V). These qualifications are explicitly stated in the Features section and verified in Sections 6.2 and 6.3 of the LM5165YQDGSRQ1 datasheet, confirming suitability for under-hood and cabin-mounted electronic control units.
LM5165YQDGSRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 150mA
- Frequency - Switching:
- Up to 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
LM5165YQDGSRQ1 FAQ
1.How can I place an order for LM5165YQDGSRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM5165YQDGSRQ1 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 LM5165YQDGSRQ1 reliable?
The price and inventory of LM5165YQDGSRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM5165YQDGSRQ1 is usually 5 days.
3.What payment methods are accepted for LM5165YQDGSRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM5165YQDGSRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM5165YQDGSRQ1?
LM5165YQDGSRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM5165YQDGSRQ1 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 LM5165YQDGSRQ1?
For technical support, including LM5165YQDGSRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM5165YQDGSRQ1 requirements.
6.How does Aetrix verify that LM5165YQDGSRQ1 is sourced from the original manufacturer or authorized distributors?
All LM5165YQDGSRQ1 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 LM5165YQDGSRQ1 meets industry standards.
7.What is the process for return or replacement of LM5165YQDGSRQ1?
All LM5165YQDGSRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM5165YQDGSRQ1, 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 LM5165YQDGSRQ1 part is unused and in its original packaging.
Return procedure for LM5165YQDGSRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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