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Infineon Technologies TLE4299G
- Part No.:
- TLE4299G
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE4299G.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:15,000
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Product details
Overview
TLE4299G from Infineon Technologies is a monolithic low-dropout linear voltage regulator delivering a fixed 3.3 V ±2% output with up to 150 mA load current, featuring integrated inhibit control (INH), reset output (RO), early warning sense (SI/SO), and operation down to input voltage of 1 V. It is AEC-Q100 qualified for automotive microcontroller power supply in engine control units and body electronics.
For engineers reviewing the TLE4299G datasheet, TLE4299G pinout, TLE4299G application, or TLE4299G equivalent, key selection criteria include its 1 µA off-state quiescent current, adjustable reset delay via external capacitor, reset threshold adjustability at RADJ, early warning hysteresis on SI, and PG-DSO-8 package compatibility with TLE4269.
Technical Context
The TLE4299G implements a PNP-based LDO architecture with internal bandgap reference and current-saturation control, enabling stable 3.3 V regulation across 4.4 V–45 V input range while maintaining <1 µA quiescent current in inhibit-off state. Its reset logic uses an external capacitor at D pin to set delay time and employs dual thresholds (VST/VDT) for glitch immunity.
Early warning functionality monitors voltage at SI pin using programmable hysteresis (VSI,low/VSI,high) and asserts open-collector SO low upon undervoltage detection; reset output RO is also open-collector with internal 20 kΩ pull-up to Q, active down to VQ = 1 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 3.3 V ±2% - tight tolerance ensures reliable MCU core/logic supply without external feedback. |
| Max output current | 150 mA - sufficient for low-power automotive MCUs and peripheral ICs in ECU subsystems. |
| Quiescent current (off) | <1 µA - enables battery-sensitive always-on systems (e.g., CAN wake-up circuits) during vehicle sleep mode. |
| Input voltage range | 4.4 V to 45 V - supports 12 V and 24 V automotive batteries including load dump transients. |
| Reset delay control | Externally set via capacitor at D pin - allows precise, application-specific reset timing without firmware dependency. |
| Reset threshold adjust | Via resistor divider at RADJ pin - enables custom reset point tuning for system-level brownout protection. |
| Early warning hysteresis | Programmable via RSI1/RSI2 - provides predictive undervoltage alert before reset assertion, improving fault handling. |
Pinout & Package
Package: PG-DSO-8 (8-pin exposed pad SOIC), RoHS-compliant, thermally enhanced for automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 I | Input supply | Connect directly to GND via ceramic capacitor; handles 4.4–45 V input with transient robustness. |
| 2 SI | Sense input | Monitors external voltage (e.g., battery rail); if unused, tie to Q to disable early warning. |
| 3 RADJ | Reset threshold adjust | Resistor divider sets reset activation level; connect to GND if fixed 3.3 V reset threshold is acceptable. |
| 4 D | Reset delay capacitor node | External capacitor sets reset assertion/deassertion timing; critical for noise-immune power sequencing. |
| 5 GND | Ground reference | Main power return path; requires low-inductance layout to support stable regulation and thermal performance. |
| 6 RO | Reset output | Open-collector output pulled up internally to Q via 20 kΩ; asserts low on undervoltage, active down to VQ = 1 V. |
| 7 SO | Sense output | Open-collector early warning signal; goes low when SI drops below VSI,low, with hysteresis for bounce suppression. |
| 8 Q | Regulated output | 3.3 V ±2% output; requires 22 µF output capacitor with ESR 0.4–3.7 Ω for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Inhibit function | Enables full shutdown with <1 µA quiescent current-essential for meeting ISO 16750-2 sleep-mode current budgets. |
| Adjustable reset delay | Capacitor-programmable timing eliminates need for external timers or MCU polling, reducing BOM count. |
| Early warning sense | Hysteresis-enabled SI/SO pair provides pre-reset alert for controlled software shutdown or data save operations. |
| Overtemperature protection | Thermal shutdown activates at Tj = 150 °C with automatic recovery-ensures safe operation during sustained overload. |
| Reverse polarity proof | Withstands -40 V input without damage-critical for service and jump-start scenarios in automotive repair environments. |
Applications
| Engine Control Unit (ECU) Power Supply | Body Control Module (BCM) Logic Rail |
|---|---|
|
Use Scenario: Powers 32-bit MCU and CAN transceiver in gasoline/diesel engine management systems operating across -40°C to 150°C ambient. IC Role / Device Role / Timing Role: Primary 3.3 V LDO regulator with integrated reset and inhibit, replacing discrete reset IC + LDO combinations. Use Value: Eliminates external reset timer and reduces PCB area by 35% versus discrete solutions while meeting AEC-Q100 Grade 0 requirements. |
Use Scenario: Supplies door module microcontrollers and LIN transceivers in 12 V vehicle architectures with frequent ignition cycling. IC Role / Device Role / Timing Role: Always-on regulated rail with programmable reset delay and early warning for graceful power-down during key-off transitions. Use Value: Enables deterministic MCU reset timing and battery voltage trend monitoring without additional supervisor ICs. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Electric Power Steering (EPS) Sensor Interface |
|
Use Scenario: Powers image signal processor and serializer in rear-view camera modules exposed to under-hood thermal stress. IC Role / Device Role / Timing Role: High-reliability 3.3 V source with thermal shutdown and reverse-polarity protection for harsh environment operation. Use Value: Survives load dump (45 V) and cold crank (4.4 V) events while maintaining reset integrity down to 1 V output. |
Use Scenario: Supplies torque sensor interface ASIC and SPI bus buffers in EPS motor control units requiring ultra-low sleep current. IC Role / Device Role / Timing Role: Inhibit-controlled LDO that enters <1 µA standby during vehicle sleep, enabling <100 µA total ECU quiescent draw. Use Value: Meets OEM parasitic drain targets without compromising reset supervision or early warning capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE4269G | No inhibit function; identical pinout and 3.3 V output but lacks INH control and early warning outputs. | Used where continuous operation is required and sleep-mode current is not constrained. | Select when inhibit and SI/SO features are unnecessary and cost minimization is prioritized. |
| TLV73333PDBVR | Non-automotive grade; 3.3 V ±1%, 300 mA, no reset/early warning/inhibit; SOT-23-5 package. | Limited to non-safety-critical consumer or industrial applications without AEC-Q100 qualification. | Choose only for prototyping or non-automotive designs where qualification and feature set are secondary. |
Compared with TLE4269G, TLE4299G adds inhibit control and early warning at identical footprint; versus TLV73333PDBVR, it delivers automotive qualification, extended input range, and system supervisory functions essential for production ECU designs.
Availability
TLE4299G is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera ECUs, and electric power steering sensor interfaces requiring stable component supply under AEC-Q100-compliant automotive conditions.
Supply support for TLE4299G 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 expertise.
The OPTIREG™ Linear product line delivers AEC-Q100-qualified voltage regulators designed specifically for demanding automotive power domains-including ECU core supplies, sensor interfaces, and always-on subsystems.
FAQ
What is the minimum input voltage required for TLE4299G to maintain regulation?
The TLE4299G maintains 3.3 V output regulation down to an input voltage of 4.4 V under nominal load. Below this, dropout behavior begins; however, its reset function remains active down to VQ = 1 V, ensuring supervisory functionality even during severe undervoltage conditions such as cold-crank events.
How is the reset delay time calculated for the TLE4299G?
Reset delay time is determined by the external capacitor CD connected between pin D and GND. The device charges and discharges CD with constant current; typical delay ranges from ~10 ms to >1 s depending on capacitance value. Exact timing is derived from the formula t_delay ≈ CD × 1.2 V / I_charge, where I_charge is specified in the datasheet as 1.2 µA (typ).
Can the early warning function operate independently of the reset function?
Yes. The SI/SO early warning circuit operates independently from the reset logic: SI monitors an external voltage, and SO asserts low when SI falls below VSI,low, with hysteresis defined by VSI,high. This occurs regardless of reset state or RADJ/D configuration, enabling concurrent voltage trend monitoring and reset signaling.
Is the TLE4299G pin-compatible with other Infineon regulators?
The TLE4299GV33 variant in PG-DSO-8 is pin-compatible with TLE4269G, sharing identical pin numbering and basic regulator functions. However, TLE4299G adds SI, RADJ, and D pins not present on TLE4269G, requiring PCB layout adaptation if migrating from the older part to leverage new features.
TLE4299G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 105 µA
- Current - Supply (Max):
- -
- PSRR:
- 66dB (100Hz)
- Control Features:
- Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8-1
TLE4299G FAQ
1.How can I place an order for TLE4299G through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4299G 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 TLE4299G reliable?
The price and inventory of TLE4299G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4299G is usually 5 days.
3.What payment methods are accepted for TLE4299G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4299G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4299G?
TLE4299G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4299G 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 TLE4299G?
For technical support, including TLE4299G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4299G requirements.
6.How does Aetrix verify that TLE4299G is sourced from the original manufacturer or authorized distributors?
All TLE4299G 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 TLE4299G meets industry standards.
7.What is the process for return or replacement of TLE4299G?
All TLE4299G units undergo pre-shipment inspection (PSI). If there is an issue with TLE4299G, 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 TLE4299G part is unused and in its original packaging.
Return procedure for TLE4299G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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