ADP7185 Series
-500 mA, Ultralow Noise, High PSRR, Low Dropout Linear Regulator
Manufacturer: Analog Devices
Catalog
-500 mA, Ultralow Noise, High PSRR, Low Dropout Linear Regulator
Key Features
• Input voltage range: −2.0 V to −5.5 V
• Maximum output current: −500 mA
• Fixed output voltage options: −0.5 V to −4.5 V
• Adjustable output from −0.5 V to −VIN+ 0.5 V
• Low output noise: 4 μV rms from 100 Hz to 100 kHz
• Noise spectral density: 20 nV/√Hz, 10 kHz to 1 MHz
• PSRR at −500 mA load68 dB at 10 kHz50 dB at 100 kHz40 dB at 1 MHz
• 68 dB at 10 kHz
• 50 dB at 100 kHz
• 40 dB at 1 MHz
• Low dropout voltage: −190 mV typical at −500 mA load
• Initial output voltage (VOUT) accuracy: ±0.5%
• Output voltage accuracy over line, load, and temperature: ±2.2%
• Operating supply current (IGND): −0.6 mA typical at no load
• Low shutdown current: −2 μA typical at VIN= −5.5 V
• Stable with small 4.7 μF ceramic input and output capacitor
• Positive or negative enable logic
• Current-limit and thermal overload protection
• 8-lead, 2 mm × 2 mm LFCSP package
• Supported by ADIsimPOWER voltage regulator design tool
Description
AI
The ADP7185 is a complementary metal oxide semiconductor (CMOS), low dropout (LDO) linear regulator that operates from −2.0 V to −5.5 V and provides up to −500 mA of output current. This high output current LDO is ideal for regulation of high performance analog and mixed signal circuits operating from −0.5 V down to −4.5 V. Using an advanced proprietary architecture, the ADP7185 provides high power supple rejection ratio (PSRR) and low noise, and it achieves excellent line and load transient response with a small 4.7 μF ceramic output capacitor.The ADP7185 is available in 15 fixed output voltage options. The following voltages are available from stock: −0.5 V, −1.0 V, −1.2 V, −1.5 V, −1.8 V, −2.0 V, −2.5 V, −3.0 V, and −3.3 V.Additional voltages available by special order are −0.8 V, −0.9 V, −1.3 V, −2.8 V, −4.2 V, and −4.5 V. An adjustable version is also available which allows output voltages that range from −0.5 V to −VIN+ 0.5 V with an external feedback divider.The enable logic feature is capable of interfacing with positive or negative logic levels for maximum flexibility.The ADP7185 regulator output noise is 4 μV rms independent of the output voltage. The ADP7185 is available in an 8-lead, 2 mm × 2 mm LFCSP, making it not only a very compact solution but also providing excellent thermal performance for applications requiring up to −500 mA of output current in a small, low profile footprint.ApplicationsRegulation to noise sensitive applications: analog-to-digital converters (ADCs), digital-to-analog converters (DACs), precision amplifiersCommunications and infrastructureMedical and healthcareIndustrial and instrumentation
