TLS203B0EJV33 - 3.3V 300mA Low-Noise LDO | Infineon
Teilenummer: TLS203B0EJV33 ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.38 | $138,00 |
| 500 | $1.18 | $590,00 |
| 1.000 | $1.02 | $1.020,00 |
| 3.000 | $0.89 | $2.670,00 |
TLS203B0EJV33 Übersicht
What is an LDO (Low-Dropout) linear regulator? An LDO is a type of voltage regulator that maintains a stable, low-noise output voltage even when the input voltage is only slightly above the desired output (small dropout). LDOs sit in the broader hierarchy: LDO -> linear regulator -> voltage regulator -> power management IC. Unlike switching regulators, LDOs do not introduce switching ripple, making them ideal as post-regulators that clean up residual noise from upstream DC-DC converters in mixed-rail systems.
Key features include reverse-polarity protection on the input, short-circuit protection with current limit, thermal shutdown, and stable operation with ceramic output capacitors as small as 3.3 uF. The regulator requires no external series resistance on the output cap, simplifying BOM and PCB layout. With an operating junction temperature of -40C to +150C and AEC-Q100 qualification, the part is designed for harsh-environment automotive subsystems.
Technically, the TLS203B0EJV33 uses a PNP pass-element topology with a precision bandgap reference, which gives the very low noise floor that the family is known for. Adding an external 0.01 uF NR/SS bypass capacitor further reduces output noise by attenuating the reference noise contribution, which is critical when the regulator follows a switching pre-regulator.
Typical applications include automotive sensor supplies (e.g. Hall, pressure, position sensors), post-regulation after switching DC-DC converters, microcontroller and ASIC core rails, and noise-sensitive analog front ends in body and chassis ECUs. It is also widely used in industrial 24V-bus point-of-load regulation.
When designing with this part, keep input trace inductance short and place the bypass capacitor close to the BYPASS pin to achieve the lowest noise. The exposed pad must be soldered to a sufficient copper pour to keep junction temperature within ratings at maximum load and minimum input-to-output differential.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the TLS203B0EJV33 that are not found on a single manufacturer or distributor product page.
Drop-in-Alternativen für TLS203B0EJV33 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
TLS203B0EJV
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLS203B0EJV33XUMA1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLS203B0LDV33
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TPS7A4533
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
LP38690-3.3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TLS203B0EJV33 Grenzwerte & elektrische Eigenschaften
| Ausgangstyp | Fixed (3.3 V) |
| Ausgangsspannung | 3.3 V |
| Output Voltage Tolerance | +/- 2.4 % |
| Maximaler Ausgangsstrom | 300 mA |
| Quiescent Current (Iq) | 30 uA typical |
| Output Voltage Noise | 30 uVrms to 45 uVrms (with 0.01 uF bypass) |
| Output Capacitor Stability | 3.3 uF ceramic minimum, no ESR limit |
| Betriebs-Sperrschichttemperatur | -40C to +150C |
| Gehäuse | PG-DSO-8-27 (DSO-8 with exposed pad) |
| Montageart | Surface Mount |
| Automotive Qualification | AEC-Q100 |
| Reverse Polarity Protection | Yes |
| Thermisches Abschalten | Yes |
| Short-Circuit Protection | Yes (current limit) |
| Bypass Pin | Yes (0.01 uF for low-noise mode) |
| RoHS-Status | Compliant |
TLS203B0EJV33 Pin-Konfiguration
| Pin 1 | IN — Input voltage supply |
| Pin 2 | IN — Input voltage supply (tied to pin 1) |
| Pin 3 | GND — Ground reference |
| Pin 4 | BYPASS — Noise bypass capacitor (0.01 uF to GND for low-noise mode) |
| Pin 5 | EN — Enable (active-high); tie to IN if not used |
| Pin 6 | OUT — Regulated 3.3 V output |
| Pin 7 | OUT — Regulated 3.3 V output (tied to pin 6) |
| Pin 8 | NC — Not connected (per datasheet) |
| Pin 9 | EP — Exposed thermal pad - solder to GND plane for heatsinking |
Typische Anwendungen
TLS203B0EJV33 ist geeignet für 6 Anwendungs: Automotive Sensor Power Supply, Post-Regulator After Switching DC-DC, Automotive Body Control Module Rails, Industrial 24V Point-of-Load Regulation, Noise-Sensitive Analog Front End, Battery-Backed Standby Rails.
Automotive Sensor Power Supply
The TLS203B0EJV33's 300 mA continuous output and reverse-polarity protection make it a clean post-regulator for automotive sensors such as Hall-effect position, MAP pressure, and oxygen-sensor analog front ends. With 30-45 uVrms output noise when paired with the optional 0.01 uF bypass capacitor, the regulator does not inject switch-mode ripple into sensitive sensor signal chains that sit behind an upstream DC-DC. The AEC-Q100 qualification and -40C to +150C junction range let designers drop it directly onto the 12 V battery rail. The exposed pad of the PG-DSO-8-27 package keeps junction rise under 50C/W with a 1 square inch copper pour, which is easily achieved in body and chassis ECU layouts.
Empfohlen
Post-Regulator After Switching DC-DC
When a switching DC-DC converter provides intermediate bus voltage, the TLS203B0EJV33 acts as a low-noise post-regulator that strips residual switching ripple from sensitive analog rails. Adding the 0.01 uF bypass capacitor drops output noise to roughly 30 uVrms, which preserves ADC SNR in measurement systems. Unlike a switching regulator, the LDO does not inject its own EMI into the surrounding analog circuitry, and the 3.3 V fixed output removes the need for a feedback divider. Its 30 uA quiescent current keeps standby drain minimal, which is critical in battery-backed industrial sensors that wake periodically.
Empfohlen
Automotive Body Control Module Rails
Body control modules (BCMs) aggregate many low-current rails for door modules, lighting, and CAN transceivers. The TLS203B0EJV33 delivers 3.3 V at 300 mA - enough to power a CAN SBC plus auxiliary logic - with AEC-Q100 qualification that matches the rest of the BCM BOM. Reverse-polarity protection on the input eliminates an external Schottky, saving PCB area and reducing quiescent loss. The exposed thermal pad of PG-DSO-8-27 lets the part sink heat into the BCM's chassis-ground copper pour, keeping junction temperature under 125C even at 70 mA continuous draw in high-temperature under-dash environments.
Empfohlen
Industrial 24V Point-of-Load Regulation
On industrial 24V factory-bus boards, the TLS203B0EJV33 provides a clean 3.3 V rail for microcontrollers and sensor front ends, accepting the 24 V bus directly with adequate dropout margin. The regulator's reverse-polarity input protection is a bonus for miswired field installations and swap-out operations. Its 30 uA quiescent current supports always-on industrial nodes that must survive extended brown-out periods without draining backup capacitors. The PG-DSO-8-27 package with exposed pad provides the thermal headroom needed for continuous 200 mA loads in sealed IP65 enclosures with limited airflow.
Empfohlen
Noise-Sensitive Analog Front End
Precision analog front ends - including 16- and 24-bit ADCs, instrumentation amplifiers, and strain-gauge bridges - need rail noise well below the converter's LSB. The TLS203B0EJV33's 30 uVrms output noise (with bypass cap) translates to less than 1 LSB of noise at a 3.3 V, 16-bit ADC reference, preserving effective resolution. Stable operation with 3.3 uF ceramic output capacitors means no ESR-induced peaking near the ADC's input bandwidth. The exposed pad of PG-DSO-8-27 allows tight placement next to the ADC reference pin, minimizing PCB trace-induced voltage drops and ground noise pickup.
Empfohlen
Battery-Backed Standby Rails
Always-on standby rails in security panels, smart meters, and IoT gateways must consume as little current as possible while still powering a small MCU and RTC. The TLS203B0EJV33 draws just 30 uA quiescent current at no load while still delivering 300 mA when the system wakes - an order-of-magnitude improvement over many competing LDOs. The 3.3 V fixed output matches typical RTC and low-power MCU supply requirements directly. AEC-Q100 qualification, while automotive-targeted, also provides the long-term reliability margin that industrial and metering applications demand over 10-15 year deployment lifetimes.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für TLS203B0EJV33 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | TLS203B0EJV | TLS203B0EJV33XUMA1 | TLS203B0LDV33 | TPS7A4533 | LP38690-3.3 |
|---|---|---|---|---|---|---|
| Package | PG-DSO-8-27 | PG-DSO-8-27 - same | PG-DSO-8-27 - same | PG-DSO-8-27 - same | PG-DSO-8-27 (verify pinout) - same outline | PG-DSO-8-27 (verify pinout) - same outline |
| Brand | Infineon | Infineon | Infineon | Infineon | Texas Instruments | Texas Instruments |
| Output Voltage | 3.3 V fixed | Adjustable | 3.3 V fixed | 3.3 V fixed | 3.3 V fixed | 3.3 V fixed |
| Maximum Output Current | 300 mA | 300 mA | 300 mA | 300 mA | 1.5 A | 1 A |
| Output Capacitor Stability | 3.3 uF, no ESR limit | 3.3 uF, no ESR limit | 3.3 uF, no ESR limit | 3.3 uF, no ESR limit | 10 uF minimum | 1 uF ceramic, no ESR limit |
| Reverse-Polarity Protection | Yes (integrated) | Yes | Yes | Yes | No | No |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 (Q1 suffix) | Not AEC-Q100 standard |
Wichtigste Unterscheidungsmerkmale
- Integrated reverse-polarity protection on input (vs. TPS7A4533)
- No-ESR ceramic-cap stability (vs. LP38690-3.3)
- Adjustable variant on same die (vs. TLS203B0LDV33 (fixed))
Designhinweise
Place the 3.3 uF minimum ceramic output capacitor directly across the OUT pins (6/7) and GND with the shortest possible trace. Place the 0.01 uF bypass capacitor on the BYPASS pin to GND as close to the IC as possible; without it, output noise rises toward 45 uVrms. The exposed thermal pad (pin 9 / EP) must be soldered to a continuous ground copper pour of at least 1 square inch to keep junction temperature within ratings at 300 mA continuous load.
Estimated: at VIN=12 V, VOUT=3.3 V, IOUT=300 mA, the regulator dissipates (12 - 3.3) x 0.3 = 2.61 W. With PG-DSO-8-27 exposed pad on 1 sq inch copper pour (theta_JA roughly 50 C/W), junction rise is about 130C above ambient - acceptable at 25C ambient but tight at 85C ambient. For continuous 300 mA operation at elevated ambient temperature, increase copper area to 2 sq inches or reduce VIN to <= 8 V to stay within thermal limits.
Do not leave the BYPASS pin floating in noise-sensitive applications - it MUST have either a 0.01 uF bypass capacitor to GND or be tied to GND for normal-noise operation. Verify the EN pin is tied high (to IN) if enable functionality is not used, otherwise the regulator will stay shut down. The exposed pad MUST be soldered; if left unsoldered, thermal performance degrades by ~3x and the part will trigger thermal shutdown at modest loads.
The reverse-polarity protection on the input handles battery-miswire events, but does NOT replace an input fuse or TVS diode for load-dump transients on automotive 12 V rails. Place an upstream TVS (e.g. 26 V SMAJ) and a 1 A fuse to comply with ISO 7637-2. The 30 uA quiescent current makes the part suitable for permanent connection to battery, but verify total system standby current including the MCU and CAN SBC stays within OEM requirements.
Compliance-Informationen
RoHS and REACH compliant per Infineon product page. AEC-Q100 qualified for automotive applications. Halogen-free per Infineon green product designation.
