TLS805B1SJVXUMA1 - 50mA, 42V Ultra-Low IQ LDO | Infineon
MPN: TLS805B1SJVXUMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.9463 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.35 | $235.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.8 | $1,800.00 |
Drop-in alternatives for TLS805B1SJVXUMA1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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TLS805B1SJVXUMA1 Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 1.2 V to 5.0 V |
| Fixed Output Options (family) | 3.3 V, 5.0 V |
| Maximum Output Current | 50 mA |
| Input Voltage Range | 2.75 V to 42 V |
| Quiescent Current (typical) | 5 µA |
| PSRR | 60 dB at 100 Hz |
| Load Dump Tolerance | 42 V |
| Operating Temperature Range | -40 °C to +125 °C (Tj) |
| Package | PG-DSO-8 |
| Mounting Type | Surface Mount |
| AEC-Q100 Grade | Qualified (automotive) |
| RoHS Status | Compliant |
| Protection Features | Current limit, overtemperature shutdown |
| Product Family | OPTIREG Linear (TLS805B1) |
TLS805B1SJVXUMA1 Pin Configuration
| Pin 1 | IN — Input voltage supply |
| Pin 2 | IN — Input voltage supply |
| Pin 3 | GND — Ground |
| Pin 4 | EN — Enable (active-high) |
| Pin 5 | OUT — Regulated output voltage |
| Pin 6 | OUT — Regulated output voltage |
| Pin 7 | ADJ/NC — Adjust on adjustable variant / NC on fixed variant |
| Pin 8 | NC — Not connected (per datasheet) |
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
TLS805B1SJVXUMA1 is suitable for 6 applications: Automotive Body Control Modules, Always-On Battery Sensor Supply, Industrial 24V Sensor and PLC Rails, Automotive Infotainment Standby Rails, LED Driver Bias Supply, IoT and Smart Home Battery-Powered Nodes.
Automotive Body Control Modules
The TLS805B1SJVXUMA1 is well-suited for automotive body control module (BCM) standby rails where 50 mA of continuous current supplies wake-up logic, Hall sensors, and small microcontrollers. With a 2.75 V to 42 V input range and 42 V load-dump tolerance, the part survives ISO 7637-2 pulse transients directly without external TVS protection, reducing BOM count. The 5 µA quiescent current keeps BCM sleep current below 100 µA total, which is critical for meeting sub-100 µA parking-mode drain requirements. Designers place the regulator immediately after the reverse-polarity FET and reverse-battery diode, with a 100 nF X7R input capacitor and a 1 µF X7R output capacitor placed within 5 mm of the IC.
Recommended
Always-On Battery Sensor Supply
For battery-powered sensor modules that must draw microamp-level standby current, the TLS805B1SJVXUMA1's 5 µA quiescent is essential to preserve battery life over years of operation. Typical use cases include TPMS sensors, keyless entry receivers, and tire pressure monitors that wake only briefly to transmit then return to sleep. The wide input range covers cranking dips down to ~6 V and load-dump spikes up to 42 V on a 12 V automotive battery. The regulator's small PG-DSO-8 footprint plus only two ceramic capacitors fits within the strict 100 mm² PCB area typical of tire-mounted sensor modules, and the -40 °C to +125 °C operating range handles under-hood thermal stress.
Recommended
Industrial 24V Sensor and PLC Rails
Industrial 24 V supply systems benefit from the TLS805B1SJVXUMA1's 42 V transient tolerance, which protects downstream analog and digital circuits from inductive kickback on solenoid and relay-driven lines. Typical use is post-protection rails feeding 3.3 V microcontrollers, ADCs, or 4-20 mA loop interfaces in PLCs and distributed I/O modules. The 50 mA output comfortably powers a small MCU plus signal-conditioning circuitry, while the 5 µA quiescent keeps always-on monitoring I/O within industrial standby power budgets. The PG-DSO-8 package drops into standard 24 V analog front-end board layouts where other Infineon OPTIREG Linear parts already reside.
Recommended
Automotive Infotainment Standby Rails
Infotainment head units and connected-car telematics control units (TCUs) require standby rails that remain alive when the main processor is off, drawing minimal current from the battery. The TLS805B1SJVXUMA1 supplies 50 mA at 3.3 V or 5 V to CAN transceivers, wake-up controllers, and memory retention circuits. The 60 dB PSRR at 100 Hz ensures that residual 12 V battery ripple does not couple into sensitive CAN bus wake-up circuits, preventing false wake events. AEC-Q100 qualification and 42 V load-dump tolerance allow direct connection to the vehicle battery bus, simplifying the power tree and eliminating an intermediate pre-regulator stage.
Recommended
LED Driver Bias Supply
The TLS805B1SJVXUMA1 provides a stable bias supply for automotive LED driver front-ends that require a clean low-noise rail for reference voltages and PWM generation. With 60 dB PSRR at 100 Hz, the regulator prevents upstream DC-DC converter ripple from modulating LED brightness through the driver reference path. Typical applications include interior ambient lighting, exterior tail lamps, and dashboard backlights where 50 mA suffices for the analog control portion of the LED driver. The wide input range lets the regulator sit directly on the 12 V automotive bus, sharing the same input protection as other 12 V loads.
Recommended
IoT and Smart Home Battery-Powered Nodes
Although primarily automotive, the TLS805B1SJVXUMA1's ultra-low 5 µA quiescent also suits long-life IoT battery nodes such as smart locks, window sensors, and remote environmental monitors that must operate for years on a single CR2032 or 2xAA cell. The wide input range accommodates boost-converter outputs and protects against reverse-polarity battery insertion events. The 50 mA output covers peak transmit bursts of sub-GHz radios or BLE SoCs during active communication. The compact PG-DSO-8 package plus minimal external BOM (two ceramic caps) keeps the total solution under 30 mm², ideal for space-constrained sensor PCBs.
Recommended
Recommended Products Summary
Engineering reference data for TLS805B1SJVXUMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLS715B0EJV50XUMA1 | TLS850B0TEV50ATMA1 | TLS835B2ELVSEXUMA1 | TLS115D0LDXUMA1 | TPS7A02 |
|---|---|---|---|---|---|---|
| Package | PG-DSO-8 | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 - same | PG-DSO-8 equivalent package - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Texas Instruments |
| Output Current | 50 mA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Voltage Range | 2.75 V to 42 V | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Quiescent Current | 5 µA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Output Type | Adjustable (1.2-5.0 V) | Fixed 5.0 V | Fixed 5.0 V | [DATA_NEEDED] | [DATA_NEEDED] | Adjustable |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
Key Differentiators
- Ultra-low 5 µA quiescent current for always-on battery applications (vs Conventional 50 mA LDOs)
- 42 V load-dump tolerance without external TVS protection (vs Standard 12 V LDO regulators)
- AEC-Q100 qualified for automotive use (vs Industrial-only LDOs)
Design Notes
The TLS805B1SJVXUMA1 requires an input capacitor and output capacitor per the Infineon datasheet to ensure regulator stability. Use a 100 nF X7R ceramic input capacitor placed within 5 mm of the IN pin to suppress high-frequency noise and provide decoupling during load transients. The output capacitor should be a low-ESR ceramic (X7R or X5R) with minimum 1 µF capacitance to maintain loop stability. In always-on applications, account for the 5 µA quiescent current contribution to total system standby budget; this part adds essentially zero drain compared with the rest of the always-on circuitry.
At 50 mA output, the TLS805B1SJVXUMA1 dissipates very modest power (typically tens of milliwatts), so thermal management is rarely a concern in standard PG-DSO-8 layouts. However, in the worst-case dropout condition (e.g., cold-crank at VIN=6 V, VOUT=5 V, IOUT=50 mA), dissipation reaches approximately 50 mW, and the PG-DSO-8 theta_JA around 50-60 °C/W yields a junction-to-ambient rise of only 3 °C - well within the 125 °C Tj limit. Estimated: Pdiss = (VIN - VOUT) × IOUT = (6 V - 5 V) × 0.05 A = 0.05 W; delta_T = Pdiss × theta_JA = 0.05 × 55 = 2.75 °C. No heatsink required.
Place input and output capacitors directly adjacent to the IC pins to minimize parasitic inductance. Use a solid ground pour on the layer directly beneath the IC to provide low-impedance thermal and electrical return paths. The PG-DSO-8 package thermal pad (if present) should be soldered to a copper pour to spread heat; even though dissipation is small, this improves long-term reliability. Keep high-current switching traces (e.g., from a pre-regulator) at least 10 mm away from the LDO output trace to avoid conducted EMI coupling into the output rail.
A common pitfall is exceeding the 42 V maximum input voltage during load-dump events - although the part is rated to 42 V, the upstream system must ensure transient peaks stay below this. Another pitfall is using output capacitors with ESR outside the datasheet-specified stability range; high-ESR electrolytics can cause instability. Finally, on the adjustable variant, verify the ADJ resistor divider values and tolerances match the target output voltage within ±1% accuracy - the ADJ pin reference and bias current characteristics must be considered in the resistor selection.
For automotive EMI compliance, route the input and output traces as short and wide as possible to minimize parasitic inductance. Star-ground the LDO GND pin to the system ground at a single point to avoid ground-loop noise. If the LDO output feeds sensitive analog circuits (e.g., ADC references), add an LC pi-filter or ferrite bead to further attenuate switching noise from upstream regulators. Keep the enable pin trace away from noisy digital signals; if unused, tie EN to IN through a 100 kΩ resistor to define the default state.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG Linear family documentation. RoHS compliant per distributor listings. Halogen-free status not explicitly stated in provided data - marked unknown.
