ADP7104ARDZ-3.3-R7

A CMOS, low dropout linear regulator that operates from 3.3 V to 20 V and provides up to 500 mA of output current. This high input voltage LDO is ideal for regulation of high performance analog and mixed signal circuits operating from 19 V to 1.22 V rails. Using an advanced proprietary architecture, it provides high power supply rejection, low noise, and achieves excellent line and load transient response with just a small 1 μF ceramic output capacitor. Available in seven fixed output voltage options and an adjustable version, which allows output voltages that range from 1.22 V to VIN - VDO via an external feedback divider. The output noise voltage is 15 μV rms and is independent of the output voltage. A digital power - good output allows power system monitors to check the health of the output voltage. A user programmable precision undervoltage lockout function facilitates sequencing of multiple power supplies. Available in 8 - lead, 3 mm×3 mm LFCSP and 8 - lead SOIC packages. The LFCSP offers a very compact solution and also provides excellent thermal performance for applications requiring up to 500 mA of output current in a small, low - profile footprint.

Applications

• Regulation to noise sensitive applications: ADC, DAC circuits, precision amplifiers, high frequency oscillators, clocks, and PLLs
• Communications and infrastructure
• Medical and healthcare
• Industrial and instrumentation

Key features

• Input voltage range: 3.3 V to 20 V
• Maximum output current: 500 mA
• Low noise: 15 μV rms for fixed output versions
• PSRR performance of 60 dB at 10 kHz, VOUT = 3.3 V
• Reverse current protection
• Low dropout voltage: 350 mV at 500 mA
• Initial accuracy: ±0.8%
• Accuracy over line, load, and temperature - 2% to + 1%, TJ = - 40°C to + 125°C; - 1.25% to + 1%, TJ = 0°C to + 85°C
• Low quiescent current [VIN = 5 V], IGND = 900 μA with 500 mA load
• Low shutdown current: < 40 μA at VIN = 12 V, stable with small μF ceramic output capacitor
• 7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V, and 9 V
• Adjustable output from 1.22 V to VIN - VDO
• Foldback current limit and thermal overload protection
• User programmable precision UVLO/enable
• Power - good indicator
• 8 - lead LFCSP and 8 - lead SOIC packages