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Infineon Technologies TLE42994EV33XUMA1
- Part No.:
- TLE42994EV33XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLE42994EV33XUMA1.pdf
- Description:
- IC REG LIN 3.3V 150MA SSOP-14-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
TLE42994EV33XUMA1 from Infineon is a monolithic 3.3 V ±2% low-dropout linear voltage regulator with integrated reset, early warning, enable, and protection functions for automotive power management. It delivers up to 150 mA output current, supports 4.4–45 V input range, operates from −40°C to +150°C, and features <1 µA shutdown current-enabling always-on functionality in engine-off vehicle states.
For engineers reviewing the TLE42994EV33XUMA1 datasheet, TLE42994EV33XUMA1 pinout, TLE42994EV33XUMA1 application, or TLE42994EV33XUMA1 equivalent, key selection criteria include its programmable reset delay (via external capacitor), adjustable reset threshold (via RADJ divider), 1 V minimum reset assertion voltage, reverse polarity protection, and exposed-pad SSOP-14 thermal performance for under-hood environments.
Technical Context
This regulator uses a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across load and input transients. Its dual comparator architecture enables independent monitoring of output voltage (for reset) and arbitrary external voltage (SI pin) for early warning-both with open-collector outputs (RO/SO) and internal 20 kΩ pull-ups.
The EN pin provides logic-level enable/disable with sub-1 µA quiescent current in OFF state. Reset delay timing is set by an external ceramic capacitor on D pin, while RADJ allows threshold adjustment down to 1 V; the device asserts reset when VQ falls below the programmed threshold, supporting fail-safe microcontroller initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% - stable supply for automotive MCUs, sensors, and CAN transceivers requiring tight tolerance |
| Max Output Current | 150 mA - sufficient for powering multiple low-power ECUs or peripheral ICs from single rail |
| Input Voltage Range | 4.4 V to 45 V - accommodates cold-crank (4.4 V), normal operation (12/24 V), and load-dump (45 V) conditions |
| Quiescent Current (ON) | Typ. 120 µA - enables ultra-low-power always-on subsystems without battery drain |
| Shutdown Current | <1 µA - meets automotive "parking mode" current budget requirements |
| Dropout Voltage | Typ. 250 mV @ 150 mA - maintains regulation during low-input-voltage cranking events |
| Reset Threshold Range | Adjustable from 1.0 V to 3.1 V via RADJ - supports flexible brown-out detection for diverse SoCs |
Pinout & Package
Package: PG-SSOP-14 Exposed Pad (RoHS-compliant, thermally enhanced for automotive under-hood mounting).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RADJ | Reset threshold adjust input | Connect external resistor divider to set custom reset point; tie to GND for default 3.10 V threshold |
| 2, 6 n.c. | No connection | Leave unconnected or tie to GND; no internal function or electrical path |
| 3 D | Reset delay timing input | Connect ceramic capacitor to GND to program reset assertion delay; open if unused |
| 4 GND | Power ground | Main return path; must be connected to PCB ground plane and heatsink area |
| 5 EN | Enable control input | High = regulator active; low = shutdown (<1 µA IQ); tie to I if always-on required |
| 7 RO | Reset output | Open-collector; sinks current when reset asserted; internal 20 kΩ pull-up to Q |
| 8 SO | Sense output | Open-collector early-warning signal; internal 20 kΩ pull-up to Q |
| 9, 10, 12 n.c. | No connection | Leave unconnected or tie to GND; no internal function or electrical path |
| 11 Q | Regulated output | 3.3 V supply rail; requires local ceramic capacitor (CQ) with specified ESR for stability |
| 13 I | Input compensation | Connect decoupling capacitor to GND near IC to suppress line noise and improve transient response |
| 14 SI | Sense input | Monitor any external voltage (e.g., battery, MCU supply); connect to Q if unused |
| PAD | Exposed thermal pad | Must be soldered to PCB copper pour tied to GND for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Programmable reset delay | Set via external capacitor on D pin-enables precise power-on sequencing alignment with downstream logic |
| Adjustable reset threshold | RADJ pin supports 1.0–3.1 V range-allows matching to specific microcontroller VDD brown-out levels |
| Early warning comparator | SI-to-SO path detects undervoltage on arbitrary rail before system failure-supports predictive diagnostics |
| Reverse polarity protection | Integrated circuitry blocks conduction if input is reversed-eliminates need for external diode in battery-connected designs |
| Overtemperature shutdown | Thermal foldback activates at Tj ≥ 160°C-prevents permanent damage during sustained overload or poor heatsinking |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) |
|---|---|
Use Scenario: Powering CAN transceivers and LIN interface ICs during vehicle sleep mode. IC Role / Device Role / Timing Role: Always-on 3.3 V regulator with sub-1 µA shutdown current and programmable reset for wake-up synchronization. Use Value: Maintains communication readiness without draining 12 V battery; reset delay ensures clean MCU boot after wake event. | Use Scenario: Supplying sensor signal conditioning circuits and ADC references during cold-crank. IC Role / Device Role / Timing Role: Low-dropout regulator with 250 mV dropout and 4.4 V min input-stays in regulation during engine start. Use Value: Prevents sensor data corruption and ECU resets during cranking transients where battery dips to 4.4 V. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Infotainment Head Unit Power Sequencing |
Use Scenario: Providing stable 3.3 V to image sensor and ISP during ignition-off parking surveillance. IC Role / Device Role / Timing Role: Automotive-qualified LDO with AEC-Q100 Grade 0 rating and −40°C to +150°C operation. Use Value: Enables continuous low-power vision processing in hot under-hood environments without thermal shutdown. | Use Scenario: Generating controlled 3.3 V rail with sequenced reset for multi-core application processors. IC Role / Device Role / Timing Role: Regulator with programmable reset delay (D pin) and adjustable threshold (RADJ) for precise power-up coordination. Use Value: Eliminates need for external reset IC; simplifies BOM and ensures deterministic boot order across SoC, PMIC, and memory rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | 3.3 V, 300 mA, SOT-23-5, no reset or sense features, max input 5.5 V | Limited to low-voltage infotainment peripherals; lacks automotive qualification and high-voltage capability | Select only for non-automotive, low-current, space-constrained designs without monitoring needs |
| MAX16910ATA+T | 3.3 V, 250 mA, TDFN-8, includes watchdog and windowed reset, input up to 28 V | Supports watchdog timeout but lacks early warning comparator and 45 V load-dump tolerance | Prefer for systems requiring watchdog supervision but not extreme input voltage or SI-based predictive alerts |
Compared with TLV73333PDBVR and MAX16910ATA+T, TLE42994EV33XUMA1 uniquely combines 45 V input tolerance, programmable reset, early warning sensing, and AEC-Q100 Grade 0 qualification-making it the only choice for under-hood always-on regulators requiring full fault coverage and wide operating range.
Availability
TLE42994EV33XUMA1 is available at Aetrix Electronics and suitable for body control modules, engine control units, ADAS camera systems, and infotainment head units requiring stable component supply across automotive production lifecycles.
Supply support for TLE42994EV33XUMA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with leadership in AEC-Q100-qualified analog products.
The OPTIREG™ Linear product line delivers robust, high-reliability voltage regulators engineered specifically for automotive power domains-including start-stop, cold-crank, and load-dump scenarios-with integrated protection and monitoring features.
FAQ
What is the minimum input voltage required for regulation at full 150 mA load?
The TLE42994EV33XUMA1 maintains regulation down to 4.4 V input at 150 mA load, verified per datasheet Section 4.2 "Functional Range". This enables reliable operation during automotive cold-crank events where battery voltage drops to 4.4 V, supported by its 250 mV typical dropout voltage.
How is the reset delay time calculated using the external capacitor on pin D?
Reset delay tdelay ≈ 1.1 × RINT × CD, where RINT = 10 MΩ (internal timing resistor) and CD is the ceramic capacitor value in farads. For example, a 100 nF capacitor yields ~1.1 s delay. The relationship is linear and specified in Figure 12 of the datasheet.
Can the sense comparator (SI/SO) monitor voltages higher than the 3.3 V output rail?
Yes-the SI pin accepts input voltages from −0.3 V to 7 V (per Absolute Maximum Ratings Table 1), enabling direct monitoring of 5 V, 12 V, or battery rails. The comparator triggers SO low when SI falls below the internal reference (typically 1.25 V), independent of Q voltage.
Is the exposed thermal pad electrically connected internally, and how must it be handled on the PCB?
The exposed pad is internally connected to GND and must be soldered to a dedicated PCB copper pour tied to the main ground plane. This provides both thermal conduction (reducing junction temperature by up to 30°C) and EMI suppression. Vias to inner-layer ground planes are recommended for high-power operation.
TLE42994EV33XUMA1 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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- 2 mA
- PSRR:
- 66dB (100Hz)
- Control Features:
- Enable, Reset
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-14-2
TLE42994EV33XUMA1 FAQ
1.How can I place an order for TLE42994EV33XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE42994EV33XUMA1 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 TLE42994EV33XUMA1 reliable?
The price and inventory of TLE42994EV33XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE42994EV33XUMA1 is usually 5 days.
3.What payment methods are accepted for TLE42994EV33XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE42994EV33XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE42994EV33XUMA1?
TLE42994EV33XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE42994EV33XUMA1 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 TLE42994EV33XUMA1?
For technical support, including TLE42994EV33XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE42994EV33XUMA1 requirements.
6.How does Aetrix verify that TLE42994EV33XUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE42994EV33XUMA1 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 TLE42994EV33XUMA1 meets industry standards.
7.What is the process for return or replacement of TLE42994EV33XUMA1?
All TLE42994EV33XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE42994EV33XUMA1, 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 TLE42994EV33XUMA1 part is unused and in its original packaging.
Return procedure for TLE42994EV33XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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