ADP7104ARDZ-1.8-R7

The ADP7104 is a CMOS, low dropout linear regulator operating from a 3.3 V to 20 V supply with a maximum output current of 500 mA. This high input voltage LDO is designed for regulating 19 V to 1.22 V supplies in high performance analog and mixed-signal circuits. The device employs an advanced proprietary architecture to deliver high power supply rejection and low noise, requiring only a single 1 μF ceramic output capacitor to achieve excellent line and load transient response. The ADP7104 offers 7 fixed output voltage options and an adjustable output version, which can be set from 1.22 V to VIN – VDO using an external feedback resistor divider. The ADP7104 output noise voltage is 15 μV rms and is independent of output voltage. These devices feature a power good digital output pin, allowing a power system monitor to verify that the output voltage is within specification. A user-programmable precision undervoltage lockout function facilitates sequencing control of multiple power supplies. The ADP7104 is available in an 8-lead 3 mm × 3 mm LFCSP and an 8-lead SOIC package. The LFCSP provides an ultracompact solution with excellent thermal dissipation performance, meeting application requirements of up to 500 mA output current in small, low-profile board spaces.

Applications

• Suited for noise-sensitive applications: ADC, DAC circuits, precision amplifiers, high-frequency oscillators, clocks, and PLL
• 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: 75 μV rms (fixed output)
• PSRR: 60 dB (10 kHz, VOUT = 3.3V)
• Reverse current protection
• Low dropout: 350 mV (500 mA)
• Initial accuracy: ±0.8%
• Accuracy over full line, load, and temperature range: -2%/+1%
• Low quiescent current (VIN = 5 V): IGND = 900 μA (500 mA load)
• Low shutdown current: < 40 μA (at VIN = 12V)
• Stable operation with 1 μF small 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 voltage range: 1.22 V to VIN – VDO
• Foldback current limiting and thermal overload protection
• User-programmable precision UVLO/enable function
• Power good indication
• 8-lead LFCSP and 8-lead SOIC packages