TPS79650DRBT

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The TPS79650DRBT is a fixed-output, positive linear low-dropout (LDO) regulator from the Texas Instruments TPS796 family. It provides a fixed 5V output with a maximum continuous current of 1A. The device features ultralow noise and high power supply rejection ratio (PSRR), making it suitable for RF applications. Key electrical parameters include a maximum input voltage of 5.5V, a typical quiescent current of 385 µA, and a maximum dropout voltage of 0.3V at 1A load. PSRR ranges from 59dB to 42dB across frequencies of 100Hz to 100kHz. It operates within a junction temperature range of -40°C to 125°C and is housed in an 8-SON (3x3) package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Ultralow-noise performance optimized for sensitive RF circuits
• High power supply rejection ratio (PSRR) for clean power delivery
• Integrated enable pin for precise power management control
• Comprehensive protection including overcurrent, thermal shutdown, reverse polarity, and UVLO

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• RF voltage controlled oscillators (VCOs)
• Receiver front-end power supplies
• Analog-to-digital converters (ADCs)
• Bluetooth and wireless LAN modules
• Cellular telephones and cordless phones

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix DRBT against the official datasheet to confirm the 8-SON package type and tape-and-reel packaging configuration. Ensure compatibility with RoHS3 standards and check moisture sensitivity level (MSL) requirements for surface-mount assembly processes. Confirm that the fixed 5V output aligns with system design specifications before procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when designing circuits requiring stable 5V rails for noise-sensitive analog or RF loads. The 1A output capability supports moderate current demands while maintaining low dropout characteristics. Consider the 385 µA quiescent current for battery-operated devices where standby power consumption is critical. The small 8-SON footprint aids in space-constrained PCB layouts compared to larger SOIC packages.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the TPS796 series of ultralow-noise, high-PSRR, fast transient response, RF 1-A low-dropout linear regulators. The series offers both adjustable and fixed output options in various packages including SON, SOT-223, and TO-263. The TPS79650 variant specifically provides a fixed 5V output, distinguishing it from adjustable models like the TPS79601 or other fixed voltages in the lineup.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

TPS79650DRBRG4 is a verified equivalent part number offering identical electrical specifications and functionality. Verify package compatibility between DRBT and DRBR variants if substituting, as both utilize the 8-SON form factor but may differ in reel packaging details.