XB2121-2.5 – LDO Regulator – Xinluda

The Xinluda XB2121-2.5 is a CMOS fixed 2.5V low-dropout (LDO) linear voltage regulator in a compact SOT-23-5 package, featuring low quiescent current, high ripple rejection, and a chip-enable pin for battery-powered designs.

The Xinluda XB2121-2.5 is a fixed 2.5V output, CMOS-process low-dropout (LDO) linear voltage regulator from the XB2121 series. Each device integrates a precision voltage reference, error amplifier, an internal resistor network for output-voltage setting, a current-limit circuit for output protection, and a chip-enable (CE) circuit on the 5-pin version. The combination of high supply-voltage ripple rejection, low dropout, low noise, high output-voltage accuracy, and very low current consumption makes the XB2121-2.5 well suited to space-constrained, battery-powered electronics.

Key Features

• Fixed 2.5V output, factory-trimmed to ±2% accuracy (2.45V / 2.50V / 2.55V min/typ/max)
• Recommended input voltage range: 2V to 6V (6.5V absolute maximum)
• Output current capability greater than 200mA (300mA absolute-maximum output current rating)
• Low dropout voltage: 150mV typical (300mV max) at I_OUT = 100mA
• Low quiescent current: 25µA typical
• Low standby current: 0.1µA typical (CE disabled)
• High ripple rejection: 70dB typical at 1kHz
• Extremely low output noise: 30µV_rms (10Hz to 100kHz)
• Excellent line regulation (4mV typ) and load regulation (12mV typ)
• Chip-enable (CE) pin on 5-pin SOT-23-5 package
• Compatible with low-ESR ceramic output capacitors as low as 1µF
• Built-in current limiting; ESD protection (2kV HBM / 200V MM)
• Operating ambient temperature range: -40°C to +85°C

Applications

• Mobile phones and cordless phones
• Wireless communication equipment
• Portable games, cameras, and video recorders
• Sub-board power supplies for telecom equipment
• General battery-powered and portable equipment

Why Source XB2121-2.5 from Pacific Component Xchange

The XB2121-2.5 is a specialty Xinluda LDO with limited authorized-distributor availability, making it difficult to source through mainstream channels. Pacific Component Xchange is an independent distributor focused on hard-to-find and obsolete power-management ICs and optocouplers. We help engineers and buyers secure these scarce parts with authenticity verification, global shipping, and flexible quantities for both prototype and production runs.

Because this is a Request-For-Quote (RFQ) item, pricing and lead time are confirmed per order against current global inventory. Submit an RFQ today and our sourcing team will return availability, pricing, and lead-time options for the XB2121-2.5 quickly.