Datasheet LT3041 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control |
| Pages / Page | 36 / 1 — LT3041. FEATURES. GENERAL DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. … |
| File Format / Size | PDF / 2.5 Mb |
| Document Language | English |
LT3041. FEATURES. GENERAL DESCRIPTION. APPLICATIONS. TYPICAL APPLICATION. Figure 2. PSRR vs. Frequency
Model Line for this Datasheet
Text Version of Document
link to page 36 link to page 36 Data Sheet
LT3041
20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control
FEATURES GENERAL DESCRIPTION
► Ultra-low output RMS noise: 1.0 μV rms (10 Hz to 100 kHz) The LT3041 is a high-performance, low-dropout linear regulator ► Ultra-low output noise spectral density: 3 nV/√Hz at 10 kHz featuring Analog Devices, Inc., ultra-low noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sen- ► Ultra-low 1/f noise: 8 µV p-p (0.1 Hz to 10 Hz) sitive applications. Designed as a precision-current reference fol- ► Ultra-high PSRR: 80 dB at 1 MHz lowed by a high-performance voltage buffer, the LT3041 can be ► Output current: 1 A easily paralleled to further reduce noise, increase output current, ► Wide input voltage range: 2.2 V to 20 V and spread heat on the printed circuit board (PCB). ► Single capacitor improves noise and PSRR The LT3041 supplies 1 A at a typical 310 mV dropout voltage. The ► SET pin current: 100 µA, ±0.5% initial accuracy operating quiescent current is nominally 4.3 mA and drops to 18 ► VIOC pin to manage power dissipation µA in shutdown. The wide output voltage range (0.2 V to 15 V) ► Single resistor programs output voltage of the LT3041 maintained by the unity-gain operation provides virtu- ► Programmable current limit ally constant output noise, PSRR, bandwidth, and load regulation, independent of the programmed output voltage. Additionally, the ► Low-dropout voltage: 310 mV regulator features VIOC, programmable current limit, fast start-up ► Output voltage range: 0.2 V to 15 V capability, and programmable power good to indicate output-voltage ► Programmable power good regulation. ► Fast start-up capability Built-in protection includes reverse-battery protection, reverse-cur- ► Precision enable/UVLO rent protection, internal current limit with foldback, and thermal limit ► Parallelable for lower noise and higher current with hysteresis. The LT3041 is available in a thermally enhanced, ► Internal current limit with foldback 14-lead 4 mm × 3 mm, DFN package. ► Minimum output capacitor: 2 parallel 10 µF ceramic ► Compact, low profile, 14-lead, 4 mm × 3 mm, DFN package
APPLICATIONS
► RF power supplies: phase-locked loops, voltage-controlled oscil- lators, mixers, low-noise amplifiers, and power amplifiers ► Low-noise instrumentation ► High-speed and high-precision data converters ► Medical applications: imaging and diagnostics ► Postregulator for switching supplies
TYPICAL APPLICATION Figure 2. PSRR vs. Frequency Figure 1. Typical Application Rev. 0 DOCUMENT FEEDBACK
Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and
TECHNICAL SUPPORT
registered trademarks are the property of their respective owners. Document Outline Features Applications Typical Application General Description Specifications Electrical Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Output Voltage Output Sensing and Stability Stability and Output Capacitance High Vibration Environments Stability and Input Capacitance PSRR and Input Capacitance Filtering High-Frequency Spikes Output Noise SET Pin (Bypass) Capacitance: Noise, PSRR, Transient Response, and Soft-Start Fast Startup EN/UV Programmable Power Good Externally Programmable Current Limit Output Overshoot Recovery Direct Paralleling for Higher Current PCB Layout Considerations High-Efficiency Linear Regulator: Voltage Input-to-Output Control (VIOC) Typical VIOC Application Thermal Considerations Calculating Junction Temperature Overload Recovery Protection Features Typical Applications Related Products Outline Dimensions Ordering Guide Evaluation Boards
LT3041
20 V, 1 A, Ultra-Low Noise, Ultra-High PSRR Linear Regulator with VIOC Control
FEATURES GENERAL DESCRIPTION
► Ultra-low output RMS noise: 1.0 μV rms (10 Hz to 100 kHz) The LT3041 is a high-performance, low-dropout linear regulator ► Ultra-low output noise spectral density: 3 nV/√Hz at 10 kHz featuring Analog Devices, Inc., ultra-low noise and ultra-high power supply rejection ratio (PSRR) architecture for powering noise-sen- ► Ultra-low 1/f noise: 8 µV p-p (0.1 Hz to 10 Hz) sitive applications. Designed as a precision-current reference fol- ► Ultra-high PSRR: 80 dB at 1 MHz lowed by a high-performance voltage buffer, the LT3041 can be ► Output current: 1 A easily paralleled to further reduce noise, increase output current, ► Wide input voltage range: 2.2 V to 20 V and spread heat on the printed circuit board (PCB). ► Single capacitor improves noise and PSRR The LT3041 supplies 1 A at a typical 310 mV dropout voltage. The ► SET pin current: 100 µA, ±0.5% initial accuracy operating quiescent current is nominally 4.3 mA and drops to 18 ► VIOC pin to manage power dissipation µA in shutdown. The wide output voltage range (0.2 V to 15 V) ► Single resistor programs output voltage of the LT3041 maintained by the unity-gain operation provides virtu- ► Programmable current limit ally constant output noise, PSRR, bandwidth, and load regulation, independent of the programmed output voltage. Additionally, the ► Low-dropout voltage: 310 mV regulator features VIOC, programmable current limit, fast start-up ► Output voltage range: 0.2 V to 15 V capability, and programmable power good to indicate output-voltage ► Programmable power good regulation. ► Fast start-up capability Built-in protection includes reverse-battery protection, reverse-cur- ► Precision enable/UVLO rent protection, internal current limit with foldback, and thermal limit ► Parallelable for lower noise and higher current with hysteresis. The LT3041 is available in a thermally enhanced, ► Internal current limit with foldback 14-lead 4 mm × 3 mm, DFN package. ► Minimum output capacitor: 2 parallel 10 µF ceramic ► Compact, low profile, 14-lead, 4 mm × 3 mm, DFN package
APPLICATIONS
► RF power supplies: phase-locked loops, voltage-controlled oscil- lators, mixers, low-noise amplifiers, and power amplifiers ► Low-noise instrumentation ► High-speed and high-precision data converters ► Medical applications: imaging and diagnostics ► Postregulator for switching supplies
TYPICAL APPLICATION Figure 2. PSRR vs. Frequency Figure 1. Typical Application Rev. 0 DOCUMENT FEEDBACK
Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and
TECHNICAL SUPPORT
registered trademarks are the property of their respective owners. Document Outline Features Applications Typical Application General Description Specifications Electrical Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Applications Information Output Voltage Output Sensing and Stability Stability and Output Capacitance High Vibration Environments Stability and Input Capacitance PSRR and Input Capacitance Filtering High-Frequency Spikes Output Noise SET Pin (Bypass) Capacitance: Noise, PSRR, Transient Response, and Soft-Start Fast Startup EN/UV Programmable Power Good Externally Programmable Current Limit Output Overshoot Recovery Direct Paralleling for Higher Current PCB Layout Considerations High-Efficiency Linear Regulator: Voltage Input-to-Output Control (VIOC) Typical VIOC Application Thermal Considerations Calculating Junction Temperature Overload Recovery Protection Features Typical Applications Related Products Outline Dimensions Ordering Guide Evaluation Boards