TLF80511EJV33XUMA1 - 400mA 3.3V LDO Regulator | Infineon
MPN: TLF80511EJV33XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.12 | $1.12 |
| 10 | $0.98 | $9.80 |
| 100 | $0.85 | $85.00 |
| 500 | $0.74 | $370.00 |
| 1,000 | $0.65 | $650.00 |
Drop-in alternatives for TLF80511EJV33XUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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TLS805B1LDV50XUMA1
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TLF80511EJV50XUMA1
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TLF80511EJ V18
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TLF80511EJV33XUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Type | LDO Linear Voltage Regulator |
| Output Type | Fixed |
| Output Voltage | 3.3 V |
| Output Voltage Accuracy | Β±2 % |
| Maximum Output Current | 400 mA |
| Input Voltage Range | 3.0 V to 40 V |
| Quiescent Current | 38 Β΅A (typical) |
| Enable Pin | Yes |
| Reset Output | Yes (with adjustable delay) |
| Operating Junction Temperature | -40 Β°C to +150 Β°C |
| Package | PG-DSO-8 (DSO-8 with exposed pad) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| RoHS Status | Compliant |
| MSL Level | 2 (1 year floor life) |
TLF80511EJV33XUMA1 Pin Configuration
| Pin 1 | EN β Enable input (active high); pull low to disable output |
| Pin 2 | IN β Input voltage supply (3.0 V to 40 V) |
| Pin 3 | IN β Input voltage supply (tie to pin 2 for low-impedance input) |
| Pin 4 | D/RO β Reset delay / Reset output (open-drain, with adjustable delay capacitor) |
| Pin 5 | NC β Not connected (no internal bond) |
| Pin 6 | OUT β Regulated output voltage (3.3 V nominal) |
| Pin 7 | IN β Input voltage supply (tie to pin 2) |
| Pin 8 | IN β Input voltage supply (tie to pin 2) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TLF80511EJV33XUMA1 is suitable for 6 applications: Automotive Body and Chassis ECU, Sensor Power Supply (Automotive), CAN/LIN Transceiver Supply, Industrial 24 V Bus Post-Regulation, Battery-Powered Instrumentation, Always-On Microcontroller Rail.
Automotive Body and Chassis ECU
The TLF80511EJV33XUMA1 fits automotive body and chassis ECUs because it accepts the full 12 V automotive bus including 40 V load-dump transients and delivers a clean 3.3 V rail at up to 400 mA. Its 38 Β΅A quiescent current keeps standby drain low on always-on modules, while AEC-Q100 qualification and the -40 Β°C to +150 Β°C junction range cover under-hood and cabin thermal stress. The exposed thermal pad keeps junction temperature manageable when supplying 400 mA to a microcontroller plus CAN/LIN transceiver. The integrated reset output with adjustable delay simplifies microcontroller power-good sequencing.
Recommended
Sensor Power Supply (Automotive)
The TLF80511EJV33XUMA1 supplies 3.3 V to automotive sensors (pressure, position, temperature) where low noise is critical for ADC accuracy. Its high PSRR at low frequencies rejects upstream switching noise from a pre-regulator, while the 400 mA current capability supports multiple sensors on one rail. AEC-Q100 qualification and 40 V input tolerance protect the supply from load-dump and jump-start events. Low 38 Β΅A Iq minimizes battery drain in parked vehicles, and the exposed pad dissipates heat when multiple sensors draw combined current.
Recommended
CAN/LIN Transceiver Supply
The TLF80511EJV33XUMA1 is the canonical post-regulator for 3.3 V CAN/LIN transceivers such as Infineon's TLE7259-3GE and NXP's TJA1028T. Its wide 3.0 V to 40 V input range accepts the 12 V bus directly, removing the need for a separate switching pre-regulator in compact nodes. The 400 mA output is more than sufficient for one transceiver plus a small microcontroller, while 38 Β΅A Iq preserves battery life in always-on networks. AEC-Q100 qualification matches the qualification level of the transceivers it powers.
Recommended
Industrial 24 V Bus Post-Regulation
In industrial PLCs and factory sensors, the TLF80511EJV33XUMA1 accepts 24 V bus power directly and provides a clean 3.3 V rail for digital logic, isolated transceivers, and sensor ADCs. The 40 V input tolerance covers the 24 V bus plus transient overvoltages common in industrial environments. The exposed thermal pad and 400 mA current capability handle multi-rail loads without external heatsinks. Its enable pin allows sequenced power-up coordinated with other rails in the PLC backplane.
Recommended
Battery-Powered Instrumentation
Battery-powered instruments benefit from the TLF80511EJV33XUMA1's 38 Β΅A quiescent current, which preserves battery life when the system is in standby between measurements. The part accepts a wide input range so it can run directly from multi-cell battery packs up to 18 V or from a 24 V industrial rail without adjustment. The exposed pad keeps the part cool during high-current measurement bursts. Integrated enable and reset outputs simplify power-tree design in portable test equipment.
Recommended
Always-On Microcontroller Rail
For always-on microcontrollers in vehicles and IoT gateways, the TLF80511EJV33XUMA1 provides a permanent 3.3 V rail that survives key-off conditions. The 38 Β΅A Iq ensures the rail costs almost nothing in standby, while AEC-Q100 qualification (and Infineon automotive-grade reliability) supports years of continuous operation. The reset output with adjustable delay holds the microcontroller in reset until the rail is stable, eliminating code-execution errors during power-up. 400 mA capacity is ample for the microcontroller plus a few quiescent peripherals.
Recommended
Recommended Products Summary
Engineering reference data for TLF80511EJV33XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLS805B1LDV50XUMA1 | TLS805B1LDV33XUMA1 | TLF80511EJV50XUMA1 | NCV551SN33T1G |
|---|---|---|---|---|---|
| Package | PG-DSO-8 EP | PG-DSO-8 EP - same | PG-DSO-8 EP - same | PG-DSO-8 EP - same | PG-DSO-8 EP - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | onsemi | onsemi |
| Output Voltage | 3.3 V | 5.0 V | 3.3 V | 3.3 V | 3.3 V |
| Maximum Output Current | 400 mA | 400 mA | 500 mA | 500 mA | |
| Input Voltage Range | 3.0 V to 40 V | 3.0 V to 40 V | up to 18 V | up to 18 V | |
| Quiescent Current | 38 Β΅A | 38 Β΅A | 8 Β΅A (lower) | 8 Β΅A (lower) | |
| Automotive Grade | AEC-Q100 | AEC-Q100 | AEC-Q100 | Commercial (not AEC-Q100) | |
| Reset Output | Yes (adjustable delay) | Yes | No (LDO only) | No (LDO only) | |
| Unit Price (qty 1, as of 2026-09-14) | $1.12 | [DATA_NEEDED] | $0.45 approx |
Key Differentiators
- 40 V input tolerance supports automotive load-dump on 12 V bus (vs NCV551SN33T1G (onsemi))
- Integrated reset output with adjustable delay (vs TLS805B1LDV50XUMA1 (Infineon, same package))
- Exposed thermal pad lowers junction-to-ambient thermal resistance (vs TLF80511EJ V18 (Infineon, lower voltage variant))
Design Notes
Estimated: At VIN=12 V, VOUT=3.3 V, and 400 mA continuous load, the TLF80511EJV33XUMA1 dissipates approximately 3.5 W ((12 V - 3.3 V) Γ 0.4 A). The PG-DSO-8 EP package with theta_JA around 50 Β°C/W (per Infineon datasheet typical, 4-layer JEDEC EIA/JESD51 board) gives a junction-temperature rise of about 175 Β°C above 25 Β°C ambient - over the 150 Β°C maximum. Reduce VIN with a pre-regulator (e.g., a small buck) or limit continuous load to about 250 mA at 12 V input on a standard 4-layer board without extra copper.
Place a low-ESR 1 Β΅F to 10 Β΅F ceramic input capacitor within 5 mm of the IN pins (pins 2, 3, 7, 8). Use a 2.2 Β΅F to 22 Β΅F ceramic output capacitor on OUT (pin 6). The exposed thermal pad (pin 9, on the underside) must be soldered to a copper pour of at least 100 mmΒ² on the top layer and stitched with thermal vias to inner ground planes. Without a soldered exposed pad, thermal resistance rises above 100 Β°C/W and the part will overheat at 400 mA.
Do not connect the NC pin (pin 5) to any signal - it has no internal bond and can cause leakage if routed. Always populate the reset-delay capacitor (C_DLY) on the D/RO pin (pin 4) even if the reset output is unused, to prevent false resets during transients. The EN pin (pin 1) is internally pulled high; tie it to ground through 100 kΞ© when shutdown is not used. Finally, observe the 40 V absolute-maximum input - sustained voltages above 45 V during jump-start conditions require additional TVS protection.
Compliance Information
AEC-Q100 qualified by Infineon for automotive applications. RoHS and REACH compliant per Infineon product page. Lead-free and halogen-free per datasheet declaration.
