RT9013-33GB

RT9013-33GB 500mA Low Dropout, Low Noise Ultra-Fast CMOS LDO Regulator

RT9013-33GB Product Overview

The RT9013-33GB is a high-performance, 500mA low-dropout (LDO) linear regulator from Richtek, offering a fixed 3.3V output with extremely high Power Supply Rejection Ratio (PSRR) and ultra-low dropout voltage. This device is specifically designed for portable RF and wireless applications where performance and space are critical.

The RT9013-33GB operates with a quiescent current as low as 25μA, significantly prolonging battery life in portable devices. The regulator works with low-ESR ceramic capacitors, reducing the board space required for power applications — a critical advantage in handheld wireless devices. Housed in a compact SOT-23-5 package, the RT9013-33GB is ideal for space-constrained designs.

RT9013-33GB Key Specifications

Output type: Fixed
Output voltage: 3.3V
Output current: 500mA
Input voltage range: 2.2V to 5.5V
Dropout voltage: 250mV typical at 500mA
Dropout voltage (maximum): 400mV at 500mA
Quiescent current: 25μA typical
Shutdown current: 0.7μA typical
Turn-on time: <40μs
PSRR: 50dB at 10kHz
Output noise: 30μVrms
Operating junction temperature range: -40°C to +125°C
Package: SOT-23-5
Mounting type: Surface Mount
Package quantity: 3,000 per reel (Tape & Reel)
RoHS: Compliant
Product status: Active (Last Time Buy notice for some variants)

RT9013-33GB Key Advantages

The RT9013-33GB delivers ultra-low dropout voltage of 250mV at 500mA, minimizing power dissipation and maximizing efficiency in battery-powered applications. The extremely low quiescent current of 25μA extends battery life in portable devices, while the 0.7μA shutdown current further conserves power during standby.

The high PSRR (50dB at 10kHz) provides excellent rejection of input voltage ripple, making the RT9013-33GB ideal for noise-sensitive RF and wireless applications. The ultra-low output noise of 30μVrms ensures clean power delivery for sensitive analog and RF circuits.

The fast turn-on time of less than 40μs enables rapid system startup. The regulator is stable with low-ESR ceramic capacitors, requiring only a 1μF output capacitor for stability — reducing bill of materials and PCB footprint.

Comprehensive protection features enhance system reliability: current limiting protection safeguards against overload conditions, thermal shutdown protection prevents damage from excessive temperature rise, and TTL-logic-controlled shutdown input enables external power management control. The wide operating junction temperature range of -40°C to +125°C supports demanding environments. The compact SOT-23-5 package with 3,000-unit tape and reel packaging supports high-volume automated assembly.

RT9013-33GB Typical Applications

CDMA/GSM cellular handsets and mobile phones
Portable information appliances and handheld instruments
Laptops, palmtops, and notebook computers
Mini PCI and PCI-Express cards
PCMCIA and new card formats
Wireless communication equipment and RF modules
Battery-powered portable devices
Consumer electronics requiring low-noise power supplies
Industrial and power management applications

RT9013-33GB Why Choose the RT9013-33GB?

The RT9013-33GB combines a fixed 3.3V output, 500mA current capability, 250mV ultra-low dropout, 25μA quiescent current, and high PSRR in a compact SOT-23-5 package. Manufactured by Richtek, a global leader in power management ICs, it delivers reliable, high-performance linear regulation specifically optimized for portable RF and wireless applications.

The ultra-low quiescent current and 0.7μA shutdown current significantly extend battery life, while the high PSRR and 30μVrms low noise ensure clean power delivery for noise-sensitive circuits. The stable operation with low-ESR ceramic capacitors and only 1μF output capacitance reduces board space and component count, accelerating time-to-market. The comprehensive protection features (current limiting, thermal shutdown) and wide -40°C to +125°C junction temperature range ensure robust operation in demanding environments.

Please note that while the RT9013-33GB remains available, some voltage variants within the RT9013 series are under Last Time Buy notice with a final purchase date of December 31, 2026. For new designs, it is recommended to verify long-term availability with Richtek or consult for alternative recommendations. The device is RoHS compliant, lead-free, and available in tape and reel packaging with a standard quantity of 3,000 units per reel.