LT3099ADE#PBF

LT3099ADE#PBF is a -20V, 1A, ultralow noise, ultrahigh PSRR negative linear regulator in a 14-pin PDFN (4mm x 3mm) package. The LT3099 is a high-performance, low-dropout negative linear regulator featuring Analog Devices, Inc.’s ultralow noise and ultrahigh power-supply rejection ratio (PSRR) architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high-performance voltage buffer, the LT3099 can be easily paralleled to reduce noise further, increase output current, and spread heat on the PCB. The device supplies 1A at a typical 350mV dropout voltage. The operating quiescent current is nominally 2.9mA and drops to 5µA in shutdown. The LT3099’s wide output voltage range (0V to -19V) error amplifier operates at unity gain and provides virtually constant output noise, PSRR, bandwidth, and load regulation independent of the programmed output voltage.

• Ultralow RMS noise: 1.4µVRMS (10Hz to 100kHz), ultralow spot noise: 4nV/√Hz at 10kHz
• Ultrahigh PSRR: 75dB at 1MHz, output current: 1A
• Wide input voltage range from -3.5V to -20V
• 100µA SET pin current: ±0.5% initial accuracy
• Single resistor programs output voltage, programmable current limit
• Low dropout voltage of 350mV, output voltage range from 0V to -19V
• Programmable power good and fast start-up
• Bi-directional precision enable/UVLO, VIOC pin to manage power dissipation
• Parallelable for lower noise and higher current, internal current limit with foldback
• Compact, 14-lead DFN package