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Infineon Technologies TLF42772ELXUMA2
- Part No.:
- TLF42772ELXUMA2
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLF42772ELXUMA2.pdf
- Description:
- IC REG LIN POS ADJ 300MA SSOP-14
- Quantity:
- Payment:
- Shipping:
Inventory:7,486
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Product details
Overview
TLF42772ELXUMA2 from Infineon is a monolithic low-dropout linear voltage regulator with integrated current monitor, adjustable output (5–12 V), 300 mA load capability, and automotive-grade protection features including overvoltage, overtemperature, and reverse-polarity detection. It serves as a dedicated supply for active antennas in car infotainment systems.
For engineers reviewing the TLF42772ELXUMA2 datasheet, TLF42772ELXUMA2 pinout, TLF42772ELXUMA2 application, or TLF42772ELXUMA2 equivalent, key selection criteria include its adjustable current limit, diagnostic CSO/ST outputs, PG-SSOP14 EP thermal performance, and AEC-Q100 qualification for permanent-battery-connected automotive use.
Technical Context
The device employs a PNP pass transistor controlled by an internal bandgap reference and feedback loop comparing VADJ to 1.25 V. Stability requires a 1 µF ceramic output capacitor with ESR ≤10 Ω at 10 kHz and proper PCB heat sinking via the exposed pad.
Current monitoring is implemented as a linear analog output (CSO) scaled at 1 mA per 1 A of load current, while ST provides open-collector digital fault signaling (low = overvoltage, overtemperature, or short-circuit). Enable (EN) supports system-level power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 5 V to 12 V, set externally via ADJ pin voltage divider - enables single IC to support FM/AM, DAB, XM, and SIRIUS antenna modules. |
| Max Output Current | 300 mA continuous - sufficient for typical active antenna RF front-end biasing without external boost stages. |
| Input Voltage Range | VI = VQ + Vdr to 40 V - supports direct connection to automotive battery (9–16 V nominal, up to 40 V transients). |
| Dropout Voltage | Typ. 300 mV at 300 mA - ensures regulation during cold-crank (≥6 V battery) when output is set to 5 V. |
| Current Monitor Accuracy | ±10% gain tolerance on CSO output - enables reliable load-current diagnostics for ECU-based antenna health monitoring. |
| Junction Temp Range | −40 °C to +150 °C - qualified per AEC-Q100 Grade 0 - suitable for under-hood or head-unit mounting locations. |
| Thermal Resistance (RthJC) | 8 K/W - achieved via exposed paddle soldered to PCB thermal pad - critical for dissipating ≥1.2 W at max load and 40 V input. |
Pinout & Package
TLF42772ELXUMA2 is housed in PG-SSOP14-EP (exposed paddle), a thermally enhanced SO-8 footprint-compatible package with 14 pins and integrated heat sink connection via Pin 13 (PAD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | IC Supply Input | Primary power input (up to 40 V); requires local decoupling capacitor to GND for line transient suppression. |
| 4 (EN) | Enable Control | Active-high logic input; ties to I if always-on operation required; enables ultra-low quiescent current shutdown mode. |
| 7 (CSO) | Current Sense Output | Analog current monitor output (1 mA/A scaling); used for real-time load diagnostics and closed-loop current limiting. |
| 8 (ST) | Status Output | Open-collector fault indicator (low = overvoltage, overtemperature, or output short); requires external pull-up. |
| 10 (GND) | Ground Reference | Main signal and power return path; must be low-impedance and tied to PAD for thermal and noise integrity. |
| 12 (ADJ) | Voltage Feedback | Resistive divider node referencing internal 1.25 V bandgap; sets regulated output voltage per VOUT = 1.25 × (1 + R1/R2). |
| 14 (Q) | Regulated Output | Power output terminal; requires ≥1 µF ceramic capacitor with ESR ≤10 Ω at 10 kHz for stability. |
| 13 (PAD) | Thermal Pad / Heat Sink | Exposed copper paddle; must be soldered to large PCB copper area (≥300 mm² recommended) for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Linear Current Monitor | Provides analog current-sense output (CSO) with ±10% accuracy - eliminates need for external sense resistor and amplifier in antenna bias monitoring. |
| Adjustable Output Current Limit | Set via external resistor on CSO pin - allows precise load protection tuning without changing IC, preventing damage to sensitive RF front-ends. |
| Reverse-Polarity Protection | Withstands −16 V on I pin - protects against battery misconnection in automotive service environments without external diode. |
| Stable with 1 µF Ceramic Output Cap | Eliminates need for tantalum or aluminum electrolytic capacitors - reduces BOM cost, improves reliability, and enables compact layout. |
| AEC-Q100 Qualified | Qualified to Grade 0 (−40 °C to +150 °C) - meets automotive functional safety requirements for permanent-battery-supplied modules. |
Applications
| FM/AM Active Antenna Supply | DAB Digital Radio Antenna Supply |
|---|---|
Use Scenario: Powering analog-tuned FM/AM active antenna modules in vehicle head units with direct battery connection. IC Role / Device Role / Timing Role: Primary LDO regulator providing stable 5–6 V bias to low-noise amplifier (LNA) stage. Use Value: Low dropout and reverse-polarity protection ensure uninterrupted reception during engine cranking and accidental battery reversal. |
Use Scenario: Supplying DAB+ antenna modules requiring precise 7–8 V bias with diagnostic visibility into antenna cable integrity. IC Role / Device Role / Timing Role: Adjustable-output LDO with current monitor enabling ECU-determined antenna fault detection (e.g., open/short cable). Use Value: CSO output allows real-time current tracking to distinguish between normal operation, cable disconnect, and short-circuit faults. |
| XM/SIRIUS Satellite Radio Antenna | Automotive Camera Module Bias Supply |
Use Scenario: Delivering regulated 12 V to XM/SIRIUS active antennas in roof-mounted shark-fin modules. IC Role / Device Role / Timing Role: High-input-voltage LDO with thermal shutdown protecting against enclosure overheating in sealed housings. Use Value: RthJC = 8 K/W and exposed paddle enable safe 12 V @ 300 mA operation in confined spaces without forced air cooling. |
Use Scenario: Providing clean, monitored bias to image sensor bias rails in ADAS forward-facing cameras. IC Role / Device Role / Timing Role: Fault-aware power source feeding analog sensor bias nodes where undetected overcurrent could corrupt image data. Use Value: ST pin provides immediate digital fault flag to SoC, triggering camera reset or warning before thermal damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable LDO with current monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE42764GV50 | Fixed 5.0 V output; no ADJ pin or current monitor; lower max input (28 V); same PG-SSOP14-EP package. | Suitable only for fixed-5V antenna loads; lacks diagnostic capability and wide-output flexibility. | Select only when output voltage is fixed and diagnostics are unnecessary. |
| TLF42771ELXUMA2 | Identical architecture but with 150 mA max output and reduced thermal capability (RthJC = 12 K/W); same pinout and features. | Appropriate for lower-power antennas (e.g., basic GPS modules); insufficient for full DAB/XM loads. | Choose for cost-sensitive, lower-current applications where thermal margin is adequate. |
Compared with TLE42764GV50 and TLF42771ELXUMA2, TLF42772ELXUMA2 uniquely combines 300 mA capability, 5–12 V adjustability, and integrated current monitoring - making it the only option for diagnostic-enabled, high-current active antenna designs across multiple radio standards.
Availability
TLF42772ELXUMA2 is available at Aetrix Electronics and suitable for automotive sensor supply, active antenna power delivery, and permanently battery-connected peripheral applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLF42772ELXUMA2 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 industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949.
TLF42772ELXUMA2 belongs to the OPTIREG™linear family, designed specifically for robust, diagnostic-capable power supply in automotive infotainment and telematics systems requiring permanent battery connectivity and fault resilience.
FAQ
What is the minimum output capacitance required for stable operation?
The TLF42772ELXUMA2 requires a minimum 1 µF ceramic output capacitor with ESR ≤10 Ω at 10 kHz. This value is validated for stability across the full 5–12 V output range and 0–300 mA load, including worst-case ±30% capacitance tolerance. Larger values improve transient response but are not required for loop stability.
How does the current monitor (CSO) function in practice?
CSO delivers a linear analog current sense signal scaled at 1 mA per 1 A of load current (e.g., 300 mA load → 0.3 mA output). It is referenced to GND, requires an external load resistor to generate a measurable voltage, and maintains ±10% accuracy across −40 °C to +150 °C - enabling precise ECU-side current diagnostics without additional components.
Can the ST pin drive an LED directly for fault indication?
No - ST is an open-collector output rated for ≤5 mA sink current and requires an external pull-up resistor (typically 10 kΩ to 5 V or VI). Direct LED connection would exceed sink capability and compromise fault signaling integrity; a buffer transistor or dedicated LED driver is required for visual indicators.
Is reverse-polarity protection active during EN = low (shutdown)?
Yes - reverse-polarity protection remains fully functional regardless of EN state. The IC withstands −16 V on the I pin even when disabled, ensuring robustness against battery misconnection during service or assembly - a critical requirement for automotive field-replaceable modules.
TLF42772ELXUMA2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 14-LSSOP (0.154", 3.90mm Width) 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, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-14-EP
TLF42772ELXUMA2 FAQ
1.How can I place an order for TLF42772ELXUMA2 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF42772ELXUMA2 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 TLF42772ELXUMA2 reliable?
The price and inventory of TLF42772ELXUMA2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF42772ELXUMA2 is usually 5 days.
3.What payment methods are accepted for TLF42772ELXUMA2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF42772ELXUMA2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF42772ELXUMA2?
TLF42772ELXUMA2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF42772ELXUMA2 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 TLF42772ELXUMA2?
For technical support, including TLF42772ELXUMA2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF42772ELXUMA2 requirements.
6.How does Aetrix verify that TLF42772ELXUMA2 is sourced from the original manufacturer or authorized distributors?
All TLF42772ELXUMA2 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 TLF42772ELXUMA2 meets industry standards.
7.What is the process for return or replacement of TLF42772ELXUMA2?
All TLF42772ELXUMA2 units undergo pre-shipment inspection (PSI). If there is an issue with TLF42772ELXUMA2, 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 TLF42772ELXUMA2 part is unused and in its original packaging.
Return procedure for TLF42772ELXUMA2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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