TLE42644GHTMA1 - 5V 100mA LDO Regulator | Infineon OPTIREG
MPN: TLE42644GHTMA1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.36 | $1.36 |
| 10 | $1.22 | $12.20 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.84 | $840.00 |
| 3,000 | $0.71 | $2,130.00 |
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TLE42644GHTMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Family | OPTIREG Linear |
| Regulator Type | LDO (Low-Dropout Linear Regulator), Positive Fixed |
| Output Voltage (Nominal) | 5 V |
| Output Voltage Accuracy | ±2 % (V_Q,nom = 5 V ±3 %) |
| Maximum Output Current | 100 mA |
| Input Voltage Range | up to 45 V |
| Quiescent Current (Typical) | 40 µA |
| PSRR | 68 dB at 100 Hz |
| Operating Junction Temperature | -40 °C to +150 °C (Automotive) |
| Package | PG-SOT223-4 (3 leads + tab) |
| Mounting Type | Surface Mount |
| Protection Features | Over-temperature shutdown, current limit, short-circuit protection, reverse-polarity protection |
| Thermal Resistance (RthJA) | Specified per JEDEC JESD51-2, -5, -7 at natural convection on FR4 2s2p board |
| RoHS Status | Compliant |
TLE42644GHTMA1 Pin Configuration
| Pin 1 | IN — Input voltage supply (up to 45 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | OUT — Regulated 5 V output (up to 100 mA) |
| Pin 4 | TAB — Exposed tab - thermal pad and ground (heat sink) |
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
TLE42644GHTMA1 is suitable for 6 applications: Automotive Body Control Module (BCM), Instrument Cluster Power Supply, CAN/LIN Transceiver Power Rail, Tire Pressure Monitoring Sensor (TPMS), Always-On Keyless Entry Receiver, Industrial 24V Sensor Module.
Automotive Body Control Module (BCM)
The TLE42644GHTMA1 is well-suited for powering automotive Body Control Modules that manage lighting, door locks, wipers, and seat controls. Its 45 V maximum input voltage tolerates load-dump transients up to ISO 7637-2 on 12 V battery rails, while the 5 V fixed output supplies microcontrollers and CAN/LIN transceivers at 100 mA. With 40 µA typical quiescent current, the regulator minimizes standby drain in always-on BCM designs. The PG-SOT223-4 package with exposed thermal tab dissipates heat efficiently on standard FR4 PCB layouts, and integrated short-circuit, over-temperature, and reverse-polarity protections reduce external component count.
Recommended
Instrument Cluster Power Supply
Digital instrument clusters require a clean 5 V rail to drive microcontroller units, display drivers, and stepper motor controllers. The TLE42644GHTMA1's 68 dB PSRR at 100 Hz rejects alternator noise from the 12 V automotive bus, ensuring stable operation of analog gauge drivers and LCD/LED backlight controllers. The 100 mA output current supports a typical cluster MCU plus CAN/LIN interface without pre-regulation, and the automotive -40 °C to +150 °C junction temperature range guarantees reliable operation in dash-mounted enclosures subject to solar heat load.
Recommended
CAN/LIN Transceiver Power Rail
In automotive in-vehicle networking, the TLE42644GHTMA1 provides a stable 5 V supply for CAN and LIN transceivers such as the Infineon TLE7259-3GE. The wide VIN range up to 45 V protects against jump-start and load-dump events, while the 40 µA quiescent current supports permanently battery-connected ECUs that wake only on CAN traffic. The integrated short-circuit protection is critical for the bus-pin fault conditions defined by ISO 11898, and the exposed tab package provides a reliable thermal path for under-hood ECUs.
Recommended
Tire Pressure Monitoring Sensor (TPMS)
TPMS modules inside wheel hubs are battery-powered and must operate for 10+ years without service. The TLE42644GHTMA1's 40 µA typical quiescent current is critical for extending battery life, and the 5 V fixed output powers the pressure-sensor ASIC and LF/UHF transmitter circuitry. The 100 mA peak output handles the radio burst current, while the 45 V input tolerance protects against alternator-coupled transients in wheel-mounted installations. The automotive AEC-Q100 grade and -40 °C to +150 °C junction range support under-hub thermal cycling.
Recommended
Always-On Keyless Entry Receiver
Keyless entry and PEPS (Passive Entry Passive Start) receivers must remain permanently powered from the 12 V battery to detect LF wake-up signals. The TLE42644GHTMA1's 40 µA quiescent current minimizes 12 V battery drain during vehicle parking (months of standby), while the 5 V output powers the LF receiver ASIC and microcontroller in sleep mode. The integrated reverse-polarity and short-circuit protections survive jump-start and fault events common in body electronics, and the wide input range tolerates voltage drops during cranking.
Recommended
Industrial 24V Sensor Module
Industrial automation sensors, process transmitters, and HVAC controllers operating from 24 V industrial bus rails benefit from the TLE42644GHTMA1's 45 V maximum input voltage. The fixed 5 V output at 100 mA powers low-power microcontrollers, analog front-ends, and IO-Link or RS-485 transceivers. The exposed-tab PG-SOT223-4 package supports DIN-rail-mounted enclosures with limited airflow, and the wide operating temperature range covers outdoor and factory-automation environments. Integrated reverse-polarity protection is essential for field-installed modules subject to wiring errors.
Recommended
Recommended Products Summary
Engineering reference data for TLE42644GHTMA1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42644GHTSA3 | TLE42662GHTMA2 | TLE42744DV50ATMA1 | TLS715B0EJV50XUMA1 | TLS805B1SJVXUMA1 |
|---|---|---|---|---|---|---|
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed |
| Output Current | 100 mA | 100 mA | 100 mA | 450 mA | 150 mA | 80 mA |
| Max Input Voltage | 45 V | 45 V | 45 V | 45 V | 45 V | 45 V |
| Quiescent Current (typ.) | 40 µA | 40 µA | 36 µA | 85 µA | 36 µA | [DATA_NEEDED] |
| PSRR at 100 Hz | 68 dB | 68 dB | 70 dB | 55 dB | 65 dB | 65 dB |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Junction Temperature | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C | -40 °C to +150 °C |
| Unit Price (qty 1, as of 2026-09-14) | $1.36 | $1.30 | $1.40 | $1.85 | $1.55 | $1.10 |
Key Differentiators
- Lowest quiescent current in OPTIREG Linear 5 V family (vs TLE42744DV50ATMA1)
- Higher PSRR for noise-sensitive analog rails (vs TLE42744DV50ATMA1)
- Footprint-compatible with OPTIREG Linear family siblings (vs TLS715B0EJV50XUMA1)
Design Notes
Estimated: at VIN=12 V, VOUT=5 V, and IOUT=100 mA, power dissipation is (12-5) × 0.1 = 0.7 W. The PG-SOT223-4 package RthJA is specified per JEDEC JESD51-2, -5, -7 on a 76.2 × 114.3 × 1.5 mm FR4 2s2p board with 2 × 70 µm and 2 × 35 µm Cu inner layers and a thermal via array under the exposed pad. For 1 oz (35 µm) top-copper pours of 1 square inch with no inner thermal vias, expect RthJA in the 50-70 °C/W range, yielding a junction rise of 35-50 °C above ambient. Solder the exposed tab to a continuous copper pour to maximize heat dissipation.
Place input and output capacitors as close to the IC pins as possible to minimize parasitic inductance. The Infineon datasheet recommends a 100 nF ceramic capacitor at the IN pin and a 1 µF to 10 µF low-ESR ceramic or tantalum capacitor at the OUT pin. For high-frequency noise rejection above 100 kHz, add an additional 10 nF ceramic bypass in parallel with the input cap. Keep the ground return path short and direct; route the GND pin to a continuous ground plane rather than a trace to avoid ground bounce.
Do not exceed the 45 V absolute maximum input voltage; transients above this rating will damage the pass transistor. Verify worst-case input voltage under load-dump (ISO 7637-2 test pulse) before finalizing the design. The exposed tab is electrically tied to GND and must be soldered to a copper pour for thermal relief - leaving the tab unsoldered increases RthJA dramatically and may cause thermal shutdown at full 100 mA load. Confirm ESR of the output capacitor is within the datasheet's stability region, particularly when using tantalum or polymer capacitors with low ESR.
Use a star-ground topology with the TLE42644G GND pin as the single-point reference for input and output capacitor returns. Place the exposed-tab copper pour on the top layer and stitch it to the inner ground plane with at least 4 thermal vias (0.3 mm drill, 1.0 mm pitch) under the tab to minimize thermal resistance. Avoid routing high-current switching signals (relay coils, motor drivers) near the regulator's output node to prevent injected noise on the 5 V rail. Keep the input trace short and wide to reduce voltage ringing during load transients.
Compliance Information
RoHS compliant per Infineon product page and DigiKey listing. AEC-Q100 qualified for automotive applications. Lead-free (PG-SOT223-4 is a lead-free package). Halogen-free status not explicitly stated in verified data - marked [DATA_NEEDED]. Conflict minerals compliance per Infineon standard policy.
