TLF80511EJV33XUMA1 - 400mA 3.3V LDO Regulator | Infineon
N.º da peça: TLF80511EJV33XUMA1 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 |
TLF80511EJV33XUMA1 Visão geral
What is an LDO (low-dropout) linear regulator? An LDO is a DC linear voltage regulator that can maintain its specified output voltage even when the input voltage approaches the output voltage (small dropout). Within the semiconductor taxonomy, an LDO sits below the broader class of linear regulators, which themselves belong to the voltage-regulator family inside power-management ICs. LDOs are favored for noise-sensitive analog, RF, and microcontroller rails because they introduce no switching ripple and require only small input/output capacitors.
Key features include a wide 3.0 V to 40 V input operating range (load-dump tolerant for 12 V automotive systems), 400 mA continuous output current, very low 38 µA quiescent current, and integrated protection such as overtemperature shutdown, output current limitation, reverse-polarity protection, and a windowed reset circuit. According to the Infineon datasheet, the part is AEC-Q100 qualified for automotive use, operates across the -40 °C to +150 °C junction range, and offers output voltage accuracy of ±2% across the full operating envelope.
The device uses an advanced bipolar pass-element architecture that achieves a low typical dropout and high PSRR at low frequencies, keeping microcontrollers, CAN transceivers, and sensor supplies free of switching noise. The exposed thermal pad (PG-DSO-8 EP) lowers junction-to-ambient thermal resistance, enabling sustained 400 mA loads without additional heatsinking in well-designed PCBs.
Typical applications include automotive body and chassis ECUs, transmission control modules, sensor supplies, CAN/LIN transceivers, and always-on microcontroller rails after a pre-regulator. Industrial use cases include PLC logic supplies, 24 V bus post-regulation, and battery-powered instrumentation.
When designing with this part, ensure the input capacitor is a low-ESR ceramic placed within 5 mm of the VIN pin and that the exposed pad is soldered to a copper pour of at least 100 mm² for thermal relief. The reset delay capacitor on the D/RO pin should be chosen per the microcontroller's required power-good timing.
This page synthesizes distributor pricing, AEC-Q100 cross-brand alternatives, and practical thermal design notes not found in the standalone manufacturer datasheet.
Alternativas drop-in para TLF80511EJV33XUMA1 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TLF80511EJV33XUMA1 (mesmo formato e footprint) — diferindo em Package, Maximum Output Current, Input Voltage Range, Protection Features, RoHS Status.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TLS805B1LDV50XUMA1
✅ Drop-In✓ Em estoque
$0.3 / unidade
Ver ficha técnica →TLS805B1LDV33XUMA1
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLF80511EJV50XUMA1
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLF80511EJ V18
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
NCV551SN33T1G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
NCP551SN33T1G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TLF80511EJV33XUMA1 Classificações máximas e características elétricas
| Manufacturer | Infineon Technologies |
| Product Type | LDO Linear Voltage Regulator |
| Tipo de saída | Fixed |
| Tensão de saída | 3.3 V |
| Output Voltage Accuracy | ±2 % |
| Corrente máxima de saída | 400 mA |
| Faixa de tensão de entrada | 3.0 V to 40 V |
| Corrente de repouso | 38 µA (typical) |
| Pino de habilitação | Yes |
| Reset Output | Yes (with adjustable delay) |
| Temperatura de junção de operação | -40 °C to +150 °C |
| Encapsulamento | PG-DSO-8 (DSO-8 with exposed pad) |
| Tipo de montagem | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| Status RoHS | Compliant |
| Nível MSL | 2 (1 year floor life) |
Configuração de pinos do TLF80511EJV33XUMA1
| Pino 1 | EN — Enable input (active high); pull low to disable output |
| Pino 2 | IN — Input voltage supply (3.0 V to 40 V) |
| Pino 3 | IN — Input voltage supply (tie to pin 2 for low-impedance input) |
| Pino 4 | D/RO — Reset delay / Reset output (open-drain, with adjustable delay capacitor) |
| Pino 5 | NC — Not connected (no internal bond) |
| Pino 6 | OUT — Regulated output voltage (3.3 V nominal) |
| Pino 7 | IN — Input voltage supply (tie to pin 2) |
| Pino 8 | IN — Input voltage supply (tie to pin 2) |
Aplicações típicas
TLF80511EJV33XUMA1 é adequado para 6 aplicaçãos: 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 µA quiescent current keeps standby drain low on always-on modules, while AEC-Q100 qualification and the -40 °C to +150 °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.
Recomendado
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 µA Iq minimizes battery drain in parked vehicles, and the exposed pad dissipates heat when multiple sensors draw combined current.
Recomendado
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 µA Iq preserves battery life in always-on networks. AEC-Q100 qualification matches the qualification level of the transceivers it powers.
Recomendado
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.
Recomendado
Battery-Powered Instrumentation
Battery-powered instruments benefit from the TLF80511EJV33XUMA1's 38 µA 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.
Recomendado
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 µA 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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TLF80511EJV33XUMA1 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 µA | 38 µA | 8 µA (lower) | 8 µA (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) |
Principais diferenciais
- 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))
Notas de projeto
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) × 0.4 A). The PG-DSO-8 EP package with theta_JA around 50 °C/W (per Infineon datasheet typical, 4-layer JEDEC EIA/JESD51 board) gives a junction-temperature rise of about 175 °C above 25 °C ambient - over the 150 °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 µF to 10 µF ceramic input capacitor within 5 mm of the IN pins (pins 2, 3, 7, 8). Use a 2.2 µF to 22 µF 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 mm² on the top layer and stitched with thermal vias to inner ground planes. Without a soldered exposed pad, thermal resistance rises above 100 °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 kΩ 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.
Informações de conformidade
AEC-Q100 qualified by Infineon for automotive applications. RoHS and REACH compliant per Infineon product page. Lead-free and halogen-free per datasheet declaration.
