TLS810B1LDV33XUMA1 - 100mA, 42V Ultra-Low Quiescent LDO | Infineon
MPN: TLS810B1LDV33XUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.72 | $7.20 |
| 100 | $0.65 | $65.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.52 | $520.00 |
Drop-in alternatives for TLS810B1LDV33XUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet βTLS810B1LDV33XUMA1 Maximum Ratings & Electrical Characteristics
| Topology | LDO (Low-Dropout Linear Regulator), fixed positive output |
| Output Voltage | 3.3 V (fixed) |
| Maximum Output Current | 100 mA |
| Input Voltage Range | 2.75 V to 42 V |
| Dropout Voltage | 250 mV typical at 100 mA (650 mV max per JLCPCB snippet) |
| Quiescent Current | 5.5 uA typical |
| PSRR | 60 dB at 100 Hz |
| Enable Pin | Yes |
| Operating Temperature (Junction) | -40C to +150C |
| Package | PG-TSON-10 (10-pin TSON with exposed pad) |
| Mounting Type | Surface Mount |
| Protection Features | Reverse polarity, over-voltage, over-current, overtemperature, ESD |
| Output Capacitor | Low-ESR ceramic compatible |
| AEC-Q100 | Qualified (automotive grade) |
| RoHS Status | Compliant |
TLS810B1LDV33XUMA1 Pin Configuration
| Pin 1 | VIN β Input voltage supply (2.75 V to 42 V) |
| Pin 2 | GND β Ground reference |
| Pin 3 | EN β Enable input (active high; tie to VIN for always-on) |
| Pin 4 | NC β Not connected (per datasheet) |
| Pin 5 | NC β Not connected (per datasheet) |
| Pin 6 | VOUT β Regulated 3.3 V output |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | NC β Not connected (per datasheet) |
| Pin 9 | NC β Not connected (per datasheet) |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin EP | EP β Exposed thermal pad - must be soldered to PCB ground pour |
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
TLS810B1LDV33XUMA1 is suitable for 6 applications: Automotive Body & Chassis ECU, Automotive Sensor Power Supply, CAN / LIN Transceiver Power Rail, Always-On Battery-Backed Microcontroller, Industrial 24 V Bus Point-of-Load, IoT Edge Node with Wide-Input Energy Harvesting.
Automotive Body & Chassis ECU
The Infineon TLS810B1LDV33XUMA1 is an ideal supply for automotive body and chassis ECUs because its 42 V maximum input voltage directly tolerates the load-dump transient on a 12 V automotive bus without external TVS protection. Its 5.5 uA quiescent current allows the ECU to remain always-on (for key-fob polling, CAN wake-up, or theft-deterrent functions) without draining the 12 V battery, even after months of vehicle parking. The 100 mA output comfortably powers an 8- or 16-bit MCU plus a CAN/LIN transceiver and a few sensors. The integrated reverse-polarity and overtemperature protection reduces external component count on the ECU PCB.
Recommended
Automotive Sensor Power Supply
The TLS810B1LDV33XUMA1 is well suited as a dedicated 3.3 V rail for automotive sensors such as pressure, parking, or temperature sensors that mount remotely from the ECU. Its 60 dB PSRR at 100 Hz rejects alternator ripple that would otherwise appear as measurement noise on sensitive analog sensor outputs. The 250 mV typical dropout keeps the rail in regulation during cold-crank events when the battery voltage sags to ~6 V, preventing sensor resets. The small PG-TSON-10 footprint fits inside space-constrained sensor housings, and the exposed thermal pad ties directly to the metal body for additional heat spreading.
Recommended
CAN / LIN Transceiver Power Rail
The TLS810B1LDV33XUMA1 provides the regulated 3.3 V rail commonly required by modern CAN FD and LIN transceivers in automotive networks. Its 42 V input withstand means the regulator can be placed directly on the 12 V bus without pre-regulation, reducing the BOM to one LDO plus input/output capacitors. The 5.5 uA Iq keeps the network node responsive to bus wake-up frames even when the MCU is in deep sleep, an essential feature for partial networking. The 100 mA continuous current is more than enough for a single transceiver plus a small MCU.
Recommended
Always-On Battery-Backed Microcontroller
The TLS810B1LDV33XUMA1 is an excellent supply for always-on battery-backed MCUs in automotive key fobs, telematics units, and remote monitoring devices. Its 5.5 uA quiescent current is among the lowest in its class, allowing the MCU to retain RTC and RAM state for years on a single CR2032 or automotive 12 V battery. The wide 2.75 V to 42 V input range means the same regulator design works across product variants from coin-cell-powered fobs to 24 V truck systems. The enable pin allows the MCU to fully shut down the regulator when deep sleep is not needed, extending battery life further.
Recommended
Industrial 24 V Bus Point-of-Load
Beyond automotive, the TLS810B1LDV33XUMA1 also serves industrial 24 V bus point-of-load regulation because its 42 V input ceiling covers the worst-case 24 V industrial transient (typically clamped to ~36 V). The 100 mA output is ideal for sensor nodes, isolated DC-DC secondary-side regulation, or small PLC I/O modules. The AEC-Q100 qualification, while automotive-focused, brings -40C to +150C junction temperature operation that comfortably exceeds the -40C to +85C industrial requirement. The exposed thermal pad simplifies PCB thermal design for sealed industrial enclosures.
Recommended
IoT Edge Node with Wide-Input Energy Harvesting
The TLS810B1LDV33XUMA1 suits IoT edge nodes powered by wide-input energy harvesting sources (solar, thermoelectric) because its 2.75 V minimum input accommodates low-output harvesting boosters, while its 42 V maximum tolerates rectified 24 V industrial supplies without damage. The 5.5 uA Iq is critical for energy-budgeted nodes where every microampere of regulator overhead reduces the average harvested current available for sensing and transmission. The 3.3 V output directly powers common IoT MCUs and sub-GHz transceivers without an additional buck/boost stage.
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Recommended Products Summary
Engineering reference data for TLS810B1LDV33XUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLS810B1LDV50XUMA1 | TLS810D1EJV33XUMA1 | TLS810D1EJV50XUMA1 | TLS805B1SJVXUMA1 | TLS850B0TEV50ATMA1 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TSON-10 | PG-TSON-10 - same | PG-TSON-10 - same | PG-TSON-10 - same | PG-TSON-10 - same | PG-TSON-10 - same |
| Output Voltage | 3.3 V | 5.0 V | 3.3 V | 5.0 V | 5.0 V | 5.0 V |
| Maximum Output Current | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | [DATA_NEEDED] |
| Input Voltage Range | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V | up to 42 V |
| Quiescent Current | 5.5 uA | 5.5 uA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Dropout Voltage | 250 mV typical at 100 mA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| PSRR | 60 dB at 100 Hz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Highest input voltage (42 V) in its class for direct 12 V automotive connection (vs Generic 100 mA / 6 V LDOs (e.g. MCP1700))
- Ultra-low 5.5 uA quiescent current for always-on battery-backed designs (vs Standard automotive LDOs with ~50-100 uA Iq)
- Integrated reverse-polarity and over-voltage protection (vs Discrete automotive LDO designs requiring external TVS and P-FET reverse protection)
Design Notes
Estimated: At VIN=12 V, VOUT=3.3 V, and 100 mA load, the TLS810B1LDV33 dissipates approximately (12 - 3.3) * 0.1 = 0.87 W. The PG-TSON-10 package has a thermal resistance of roughly 50 C/W on a 1-square-inch 2-oz copper pour (per JEDEC EIA/JESD51 standard assumptions), producing a junction temperature rise of about 44 C above ambient. At worst-case cold-crank or load-dump VIN transients, the dissipation can spike above 1 W; ensure the exposed thermal pad is soldered to a continuous ground copper pour of at least 25 mm squared for reliable operation above 60C ambient.
Place the input capacitor (1 uF to 10 uF low-ESR ceramic, X7R) within 2 mm of the VIN pin to suppress automotive input transients including load-dump and reverse-polarity events. Place the output capacitor (1 uF to 10 uF low-ESR ceramic, X7R or X5R) within 2 mm of the VOUT pin for loop stability. The exposed thermal pad must be soldered to a continuous PCB ground pour with multiple thermal vias (recommended 4-6 vias, 0.3 mm drill) to spread heat into the inner PCB copper layers and prevent thermal shutdown during peak loads.
Three common pitfalls when designing with the TLS810B1LDV33XUMA1: (1) Do not omit the input capacitor - the regulator's reverse-polarity protection relies on the input capacitor to clamp inductive transients. (2) Do not load the EN pin with heavy capacitance or pull-up resistance below 10 kohm, as the EN input has a specific threshold and source current per datasheet. (3) The 42 V input rating is a DC continuous rating - peak transients during load-dump may briefly exceed this and require an external TVS clamp for full automotive surge compliance (ISO 7637-2). Always consult the Infineon application note for the recommended input protection network.
Route the EN pin away from noisy VIN or switching traces to prevent false triggering. Keep the ground return path of the output capacitor short and direct to the EPAD ground pour to minimize ground bounce. If the design uses a separate analog ground for sensitive downstream circuitry, star-connect the LDO ground to the EPAD at a single point near the exposed pad, never daisy-chain the LDO ground through other components. Refer to the Infineon OPTIREG LINEAR application notes for a reference PCB layout pattern.
Compliance Information
AEC-Q100 qualified for automotive applications. RoHS compliant per JLCPCB listing. Lead-free and halogen-free packaging. Conflict-minerals compliant per Infineon supply-chain disclosure.
