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Infineon Technologies TLF42772LDXUMA1
- Part No.:
- TLF42772LDXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 10-TFDFN Exposed Pad
- Datasheet:
-
TLF42772LDXUMA1.pdf
- Description:
- IC REG LIN POS ADJ 300MA TSON-10
- Quantity:
- Payment:
- Shipping:
Inventory:3,249
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Product details
Overview
TLF42772LDXUMA1 from Infineon Technologies is an automotive-qualified low-dropout linear voltage regulator with integrated current monitor, adjustable output voltage (5–12 V), 300 mA output current capability, and diagnostic outputs (CSO, ST). It serves as a dedicated power supply for active antennas in car infotainment and telematics systems including GPS, GNSS, DAB, and FM/AM.
For engineers reviewing the TLF42772LDXUMA1 datasheet, TLF42772LDXUMA1 pinout, TLF42772LDXUMA1 application, or TLF42772LDXUMA1 equivalent, key selection criteria include its AEC-Q100 qualification, reverse-polarity protection, ceramic-capacitor stability (1 µF), adjustable current limit, and dual diagnostic outputs for overvoltage/overtemperature/fault monitoring.
Technical Context
The TLF42772LDXUMA1 integrates a precision bandgap reference, adjustable LDO pass element, and linear current monitor with open-collector status output (ST) and current-sense output (CSO). Its enable input (EN) supports system-level power sequencing, while ADJ pin allows resistor-divider-based output voltage configuration across 5–12 V.
Protection logic includes overvoltage detection at the Q pin, thermal shutdown at 150°C junction temperature, and adjustable output current limitation. Fault conditions are signaled simultaneously via ST (digital flag) and CSO (analog current-proportional output), enabling both system-level fault logging and real-time load current measurement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | Up to 300 mA - sufficient to power active antenna modules without external boost stages. |
| Input voltage range | −16 V to +45 V - supports reverse-polarity protection and wide automotive battery transients (e.g., load dump). |
| Output voltage range | 5 V to 12 V (adjustable via ADJ pin divider) - covers standard active antenna supply requirements (GPS: 5 V, DAB: 6–8 V, XM/SIRIUS: 12 V). |
| Current monitor accuracy | ±10% full-scale error - enables reliable load current diagnostics for antenna health monitoring and cable integrity checks. |
| Thermal shutdown threshold | 150°C junction temperature - protects against sustained overload or poor PCB heatsinking in confined enclosures. |
| Output capacitor requirement | 1 µF ceramic (min), ESR ≤10 Ω - eliminates need for bulk electrolytic capacitors, reducing board area and improving reliability. |
| Operating junction temperature | −40°C to +150°C - qualified for under-hood and head-unit mounting locations per AEC-Q100 Grade 0. |
Pinout & Package
TLF42772LDXUMA1 is housed in PG-TSON-10 package (3 mm × 3 mm, 0.65 mm pitch) with exposed thermal pad (PAD) connected to GND for enhanced heat dissipation. The 10-pin layout supports compact placement in space-constrained antenna modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | IC supply input | Primary power input; requires local decoupling capacitor to GND for transient immunity and noise suppression. |
| 3 (EN) | Enable control | Active-high logic input; disables regulator and reduces quiescent current to <10 µA when pulled low. |
| 5 (CSO) | Current sense output | Analog current source proportional to load current (1 µA/mA); used for real-time current monitoring and fault diagnosis. |
| 6 (ST) | Status output | Open-collector digital flag; pulls low during overvoltage, overtemperature, or short-circuit events. |
| 7 (GND) | Ground reference | Common return path for regulator, monitor, and protection circuits; must be low-impedance connection to PCB ground plane. |
| 8 (ADJ) | Voltage adjust | Feedback node for external resistor divider; sets output voltage per VOUT = VREF × (1 + R1/R2), where VREF = 1.25 V. |
| 10 (Q) | Regulator output | Stabilized power output; connects directly to antenna module supply rail with local 1 µF ceramic capacitor. |
| PAD | Thermal pad | Exposed copper pad soldered to PCB GND plane; critical for achieving RthJA ≤55 K/W in production layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated current monitor | Provides analog current-proportional output (CSO) for real-time load diagnostics without external sense resistors or amplifiers. |
| Adjustable output current limit | Configurable via external resistor on ILIM pin (not shown in provided pinout but confirmed in datasheet Section 6.1.2) to protect downstream antenna circuitry from overcurrent. |
| Reverse-polarity protection | Withstands −16 V input without damage - eliminates need for external series diode or MOSFET in battery-connected applications. |
| Dual fault signaling | Simultaneous analog (CSO) and digital (ST) fault reporting enables both precise current tracking and fast system-level interrupt response. |
| AEC-Q100 qualified | Validated for automotive use (Grade 0: −40°C to +150°C), including stress testing for temperature cycling, humidity, and mechanical shock. |
Applications
| GPS/GNSS Antenna Supply | FM/DAB Radio Antenna Supply |
|---|---|
|
Use Scenario: Powering embedded GPS/GNSS active antennas in vehicle navigation units or telematics control units (TCUs). IC Role / Device Role / Timing Role: Primary regulated 5 V supply with current monitoring for antenna bias and fault detection. Use Value: Enables continuous antenna health monitoring via CSO output, supporting predictive maintenance and reducing field failures due to coaxial cable degradation. |
Use Scenario: Supplying FM, AM, DAB, or digital radio antennas mounted on vehicle roofs or rear windows. IC Role / Device Role / Timing Role: Adjustable 6–8 V LDO supply with reverse-polarity and load-dump tolerance for permanent battery connection. Use Value: Eliminates need for discrete protection components, reducing BOM count and PCB footprint while maintaining AEC-Q100 compliance. |
| XM/SIRIUS Satellite Radio Antenna | Automotive Telematics Antenna Hub |
|
Use Scenario: Delivering stable 12 V to satellite radio antennas requiring higher bias voltage than terrestrial radio bands. IC Role / Device Role / Timing Role: Configurable high-voltage LDO with integrated overvoltage protection to prevent damage during antenna hot-plug or ESD events. Use Value: Adjustable output voltage ensures compatibility across multiple satellite radio standards without redesigning the power stage. |
Use Scenario: Centralized antenna power management in multi-band telematics gateways supporting LTE, GNSS, and Wi-Fi/BT coexistence. IC Role / Device Role / Timing Role: One of several identical regulators supplying independent antenna paths with individual current monitoring and fault isolation. Use Value: Enables per-antenna diagnostics and graceful degradation - if one antenna fails, others remain operational with no system reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator with current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLF4935DXTSA1 | Fixed 5 V output, no ADJ pin, lower max output current (250 mA), same PG-TSON-10 package and AEC-Q100 Grade 0 rating. | Limited to fixed 5 V antenna loads; lacks voltage and current limit adjustability required for multi-standard antenna support. | Select when only GPS/GNSS 5 V supply is needed and design simplicity outweighs configurability. |
| MAX16910ATP+T | Higher input voltage (45 V), integrated watchdog timer, but no current monitor output; uses 20-pin TQFN package. | Requires external current sensing for diagnostics; larger footprint and different pinout prevent drop-in replacement. | Choose when system-level watchdog functionality is prioritized over real-time current telemetry. |
Compared with TLF42772LDXUMA1, TLF4935DXTSA1 sacrifices adjustability for cost and integration simplicity, while MAX16910ATP+T trades current monitoring for enhanced system supervision - making TLF42772LDXUMA1 uniquely suited for applications demanding both programmable voltage/current limits and analog current telemetry.
Availability
TLF42772LDXUMA1 is available at Aetrix Electronics and suitable for automotive sensor supply, active antenna power delivery, and telematics peripheral regulation requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLF42772LDXUMA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global manufacturing and automotive qualification infrastructure.
TLF42772LDXUMA1 belongs to the OPTIREG™ linear family, designed specifically for robust, diagnostic-capable power delivery in automotive antenna and sensor subsystems operating under harsh electrical and thermal conditions.
FAQ
What is the function of the CSO pin?
The CSO (Current Sense Out) pin delivers a current source output proportional to the load current at Q, with 1 µA per mA of output current. It enables real-time current measurement without shunt resistors and supports diagnostic functions such as antenna cable break detection and overcurrent warning before thermal shutdown occurs.
How is output voltage adjusted on TLF42772LDXUMA1?
Output voltage is set using an external resistor divider between Q, ADJ, and GND. With internal reference voltage of 1.25 V at ADJ, VOUT = 1.25 V × (1 + R1/R2). For example, R1 = 6.8 kΩ and R2 = 1.0 kΩ yields ~9.8 V output, covering common DAB and satellite radio requirements.
Does TLF42772LDXUMA1 require an external MOSFET for reverse-polarity protection?
No. The device integrates reverse-polarity protection capable of withstanding −16 V at the I pin without external components. This eliminates the need for series PMOS or diodes in battery-permanent applications, reducing power loss and component count while maintaining AEC-Q100 compliance.
What thermal performance can be expected with standard PCB layout?
With a 300 mm² copper pour connected to the exposed PAD, RthJA is 67 K/W, allowing ~1.5 W power dissipation at ΔT = 100 K. At full 300 mA into 12 V output with 40 V input, worst-case power dissipation is ~9 W - requiring ≥600 mm² heatsink area or forced air cooling per datasheet Section 3.3.
TLF42772LDXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 10-TFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 12V
- Voltage Dropout (Max):
- 0.5V @ 200mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 11 mA
- PSRR:
- 65dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Over Voltage
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TSON-10
TLF42772LDXUMA1 FAQ
1.How can I place an order for TLF42772LDXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF42772LDXUMA1 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 TLF42772LDXUMA1 reliable?
The price and inventory of TLF42772LDXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF42772LDXUMA1 is usually 5 days.
3.What payment methods are accepted for TLF42772LDXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF42772LDXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF42772LDXUMA1?
TLF42772LDXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF42772LDXUMA1 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 TLF42772LDXUMA1?
For technical support, including TLF42772LDXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF42772LDXUMA1 requirements.
6.How does Aetrix verify that TLF42772LDXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLF42772LDXUMA1 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 TLF42772LDXUMA1 meets industry standards.
7.What is the process for return or replacement of TLF42772LDXUMA1?
All TLF42772LDXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF42772LDXUMA1, 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 TLF42772LDXUMA1 part is unused and in its original packaging.
Return procedure for TLF42772LDXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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