ADM7151ARDZ-04

The ADM7151 is a low dropout (LDO) linear regulator that operates from 4.5 V to 16 V and provides up to 800 mA of output current. Using an advanced proprietary architecture, it provides high power supply rejection (> 90 dB from 1 kHz to 1 MHz), ultralow noise (1.7 nV/√Hz from 10 kHz to 1 MHz), and excellent line and load transient response with a 10 μF ceramic output capacitor. The output voltage can be set to any voltage between 1.5 V and 5.1 V with two resistors. The ADM7151 regulator output noise is 1.0 μV rms from 100 Hz to 100 kHz, and the noise spectral density is 1.7 nV/√Hz from 10 kHz to 1 MHz. The ADM7151 is available in 8 - lead, 3 mm×3 mm LFCSP and 8 - lead SOIC packages, making it not only a very compact solution, but also providing excellent thermal performance for applications requiring up to 800 mA of output current in a small, low profile footprint.

Applications

• Regulated power noise sensitive applications: RF mixers, phase - locked loops (PLLs), voltage - controlled oscillators (VCOs), and PLLs with integrated VCOs
• Clock distribution circuits
• Ultrasound and other imaging applications
• High speed RF transceivers
• High speed, 16 - bit or greater ADCs
• Communications and infrastructure
• Cable digital - to - analog converter (DAC) drivers

Key features

• Input voltage range: 4.5 V to 16 V
• Maximum output current: 800 mA
• Adjustable output from 1.5 V to 5.1 V
• Low noise: 1.0 μV rms total integrated noise from 100 Hz to 100 kHz, 1.6 μV rms total integrated noise from 70 Hz to 100 kHz
• Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz
• Power supply rejection ratio (PSRR) at 400 mA load > 90 dB from 1 kHz to 100 kHz, > 60 dB at 1 MHz, Vout = 5 V
• Dropout voltage: 0.6 V at Vout = 5 V, 800 mA load
• Initial voltage accuracy: ±1%
• Voltage accuracy over line, load and temperature: ±2%
• Quiescent current (IGND): 4.3 mA at no load
• Low shutdown current: 0.1 μA
• Stable with a 10 μF ceramic output capacitor
• 8 - lead LFCSP package and 8 - lead SOIC package