TLE42644GHTSA3 - 5V 100mA LDO Regulator | Infineon OPTIREG
MPN: TLE42644GHTSA3 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.24 | $2.24 |
| 10 | $2.02 | $20.20 |
| 100 | $1.81 | $181.00 |
| 500 | $1.59 | $795.00 |
| 1,000 | $1.37 | $1,370.00 |
Drop-in alternatives for TLE42644GHTSA3 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLE42644G
✅ Drop-In📋 Reference alternative (not in catalog)
TLE4264-2G
✅ Drop-In📋 Reference alternative (not in catalog)
TLE42662GHTMA2
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →TLE42744DV50ATMA1
✅ Drop-In✓ In Stock
$0.74 / Unit
View Datasheet →TLE42644GHTSA3 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Series | OPTIREG LINEAR |
| Regulator Type | LDO (Low-Dropout), Fixed Positive |
| Number of Outputs | 1 |
| Nominal Output Voltage | 5 V |
| Output Voltage Accuracy | ±2% (load), ±3% (overall) |
| Maximum Output Current | 100 mA |
| Maximum Input Voltage | 45 V |
| Quiescent Current | 40 µA |
| Operating Temperature Range | -40°C to +150°C (junction) |
| Package | PG-SOT223-4 (TO-261-4, 3+Tab) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| AEC-Q100 Qualified | Yes |
| Protection Features | Reverse polarity, short circuit, overload, overtemperature |
| Packaging | Tape & Reel (T/R) |
TLE42644GHTSA3 Pin Configuration
| Pin 1 | IN — Input voltage (up to 45 V) |
| Pin 2 | GND — Ground |
| Pin 3 | OUT — Regulated 5 V output |
| Pin 4 | TAB — Ground / thermal tab (must be soldered to PCB copper 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
TLE42644GHTSA3 is suitable for 6 applications: Automotive Body Control Module (BCM) Standby Rail, Sensor and Actuator Power Supply in ADAS Modules, Industrial 24 V Bus Sensor Power, Infotainment Head-Unit Standby Supply, Battery-Backed Telematics Control Unit (TCU) Rail, HVAC Control Panel Microcontroller Supply.
Automotive Body Control Module (BCM) Standby Rail
The TLE42644GHTSA3 is well suited for body control module standby rails where 5 V must be maintained from a 12 V battery with minimal quiescent current. Its 40 µA Iq allows the BCM to remain CAN-active in sleep mode without draining the battery, while the 45 V input rating tolerates load-dump transients up to the ISO 7637-2 pulse profile. AEC-Q100 qualification supports under-dash and under-hood placement, and the PG-SOT223-4 tab enables soldering to chassis ground copper for thermal relief. Compared with discrete Zener + BJT solutions, the integrated regulator reduces BOM count, provides overtemperature shutdown, and improves output accuracy to ±2% across load.
Recommended
Sensor and Actuator Power Supply in ADAS Modules
In ADAS camera and radar modules, the TLE42644GHTSA3 powers low-current analog and digital sensors requiring clean 5 V from a noisy 12 V battery rail. The LDO's lack of switching ripple preserves signal integrity for SAR ADCs and ultrasonic transducer front-ends, while its 45 V input rating absorbs load-dump events. Its 40 µA quiescent current supports parking-mode operation where the ECU draws under 100 µA total. The PG-SOT223-4 footprint fits behind BGA sensor packages, and the exposed thermal tab allows heat sinking through inner PCB layers. AEC-Q100 Grade 1 (-40°C to +125°C ambient) qualification meets OEM automotive reliability requirements.
Recommended
Industrial 24 V Bus Sensor Power
The TLE42644GHTSA3 is a good fit for industrial 24 V bus sensors that need a regulated 5 V rail for microcontrollers and signal-conditioning circuitry. Its 45 V input rating covers the IEC 61131-2 transient envelope for 24 V PLC systems, while the LDO's low 4 µV/√Hz noise floor protects precision analog front-ends. Its 40 µA Iq supports remote sensors powered over the bus that must draw minimal standby current. The PG-SOT223-4 package fits standard 24 V sensor enclosures, and the integrated reverse-polarity and short-circuit protection guard against wiring faults common in field installations.
Recommended
Infotainment Head-Unit Standby Supply
The TLE42644GHTSA3 supplies the always-on 5 V rail in automotive infotainment head units that must remain partially active for key-fob detection and remote-start handshake. Its 40 µA quiescent current keeps the standby budget under OEM limits, and its 45 V input withstands double-battery jump-start events where the rail briefly reaches 24 V. The regulator's ±2% accuracy over load supports RTC and eMMC retention voltage requirements, while AEC-Q100 qualification satisfies the head-unit's automotive reliability spec. The PG-SOT223-4 tab solders to the head-unit's main ground pour, providing sufficient thermal relief at 100 mA continuous load.
Recommended
Battery-Backed Telematics Control Unit (TCU) Rail
In telematics control units that remain connected to the cellular network during vehicle parked mode, the TLE42644GHTSA3 supplies the 5 V rail that powers the modem's sleep controller and accelerometer wake-up circuitry. Its 40 µA Iq directly translates to months-long parking-mode standby life on a 60 Ah battery, while its 45 V input tolerates jump-start events. AEC-Q100 qualification and overtemperature protection support under-seat mounting where ambient temperatures can exceed 85°C. The PG-SOT223-4 footprint fits beside the SIM card holder, and the integrated reverse-polarity block protects against service-tool miswiring during TCU replacement.
Recommended
HVAC Control Panel Microcontroller Supply
The TLE42644GHTSA3 powers the microcontroller and LED backlight driver in automotive HVAC control panels that draw 5 V from the body control module's 12 V distribution. Its 40 µA Iq supports the panel's sleep state where the display remains blank but the CAN bus interface stays active. The 45 V input rating absorbs inductive kick from HVAC blower motor PWM switching, while the LDO's low output noise prevents LED flicker visible on the backlight. AEC-Q100 Grade 1 qualification and the PG-SOT223-4 footprint meet HVAC supplier sourcing requirements across major OEMs.
Recommended
Recommended Products Summary
Engineering reference data for TLE42644GHTSA3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE42644G | TLE4264-2G | TLE42662GHTMA2 |
|---|---|---|---|---|
| Package | PG-SOT223-4 | PG-SOT223-4 - same | PG-SOT223-4 - same | PG-SOT223-4 - same |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Output Voltage | 5 V fixed | 5 V fixed | 5 V fixed | 5 V fixed |
| Maximum Output Current | 100 mA | 100 mA | 100 mA | 120 mA |
| Quiescent Current | 40 µA | 40 µA | ~1 mA (higher) | ~250 µA |
| Maximum Input Voltage | 45 V | 45 V | 45 V | 45 V |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes |
| Watchdog / Reset | No | No | No | Yes (watchdog + reset) |
| Pin-to-Pin Compatible | Yes | Yes | Yes | Yes (same SOT-223 footprint) |
Key Differentiators
- Ultra-low 40 µA quiescent current for standby-sensitive designs (vs TLE4264-2G)
- Integrated reverse-polarity protection block (vs TLE42662GHTMA2)
- Drop-in upgrade path for legacy TLE4264-2 designs (vs TLE4264-2G)
Design Notes
At VIN=12 V, VOUT=5 V, and 100 mA load, the TLE42644GHTSA3 dissipates approximately 0.7 W. The PG-SOT223-4 package has a theta_JA of approximately 70°C/W on a 1 oz copper 1 square inch pour, resulting in a junction temperature rise of ~49°C above ambient. For continuous 100 mA operation at VIN above 18 V, increase the copper pour area or add thermal vias under the exposed tab. Always keep Tj below 150°C per the datasheet maximum.
Place a 100 nF ceramic input bypass capacitor within 5 mm of the IN pin and a low-ESR 1 µF to 10 µF output capacitor within 5 mm of the OUT pin. The exposed tab (pin 4) must be soldered to a copper pour that carries both electrical ground and thermal dissipation. Use multiple thermal vias under the tab to inner ground planes for best thermal performance. Avoid routing high-current traces under the regulator to prevent ground-bounce noise coupling into the feedback loop.
Do not exceed the absolute maximum input voltage of 45 V - automotive load-dump transients can reach 35 V steady-state plus inductive overshoot. The output capacitor's ESR must remain below the datasheet stability limit; use X7R or X5R ceramic capacitors rated for at least 10 V. The reverse-polarity protection block protects the IC but does NOT protect downstream loads - verify the input wiring harness before powering up. Do not operate with VIN below VOUT + dropout or the output will collapse.
Compliance Information
AEC-Q100 qualified per Infineon OPTIREG LINEAR datasheet. RoHS and REACH compliant. Lead-free and halogen-free per DigiKey product page.
