TPS77533QPWPRCT Texas Instruments Integrated Circuit (Thin Shrink Small Outline Packages) In Stock
TPS77533QPWPRCT is a 3.3 V, 500 mA low-dropout linear regulator (LDO) with enable control by Texas Instruments. Key specs: 500 mA output current, 3.3 V fixed output, AEC-Q100-qualified, -40°C to 125°C operating range in a TSSOP-20 package. From stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Thin Shrink Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- AEC-Q100-qualified 3.3 V fixed LDO rated for -40°C to 125°C automotive and industrial temperature ranges
- 500 mA output current with low dropout voltage enables efficient regulation from automotive 5 V rail to 3.3 V microcontroller supply
- Enable pin control with power-good flag simplifies sequencing in multi-rail automotive ECU power management designs
Applications
The TPS77533QPWPRCT is designed for automotive ECU, ADAS module, and in-vehicle infotainment power management where a reliable 3.3 V, 500 mA regulated rail is required alongside AEC-Q100 qualification. Its -40°C to 125°C temperature range and robust LDO architecture suit under-hood and passenger-compartment electronics requiring low noise on sensitive analog and communication supply rails. The TSSOP-20 package offers a compact footprint with minimal external components for space-constrained automotive PCB designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What qualifications does TPS77533QPWPRCT hold that make it suitable for automotive ECU applications?
The TPS77533QPWPRCT carries AEC-Q100 Grade 1 qualification, confirming device reliability has been verified across the -40°C to 125°C automotive temperature range through accelerated stress testing. This qualification is required by Tier 1 automotive suppliers for any active component used in engine management, body control, and ADAS modules, ensuring the LDO meets automotive supply chain traceability and quality standards.
For a 3.3 V microcontroller rail in a 5 V automotive ECU, what is the power dissipation of TPS77533QPWPRCT at 500 mA?
Operating from a 5 V input while supplying 3.3 V at 500 mA, the TPS77533QPWPRCT dissipates (5 V − 3.3 V) × 500 mA = 850 mW. The TSSOP-20 package has a thermal resistance of approximately 60°C/W junction-to-ambient, so without a heatsink the junction temperature rises by about 51°C above ambient — remaining within the 125°C junction limit at up to 74°C ambient, which covers most passenger-compartment operating conditions.
How does the enable pin on TPS77533QPWPRCT assist with power sequencing in a multi-rail automotive power-management design?
The enable pin on the TPS77533QPWPRCT accepts a logic-level signal to turn the 3.3 V output on or off under microcontroller or power-sequencer control. In a typical automotive ECU with separate 5 V and 3.3 V rails, the enable pin ensures the 3.3 V rail only powers up after the 5 V rail has stabilized — typically after a 1 ms to 5 ms delay — preventing latch-up conditions on peripherals that require correct power-sequencing.
When would a designer choose TPS77533QPWPRCT over a switching regulator for a 3.3 V automotive supply rail?
An LDO like the TPS77533QPWPRCT is preferred over a switching regulator when the 3.3 V rail powers noise-sensitive analog circuitry such as sensor interfaces, CAN transceivers, or audio codecs, since LDOs have no switching ripple and typically achieve PSRR above 60 dB at low frequencies. For loads below 200 mA where the dropout loss (850 mW at 500 mA drops to 340 mW at 200 mA) is tolerable within the thermal budget, the LDO's simplicity, lower EMI, and smaller 2-capacitor solution outweigh the efficiency benefit of a buck converter.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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