●Product Details
●The ADP7105 is a CMOS, low dropout (LDO) 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 regula-tion of high performance analog and mixed-signal circuits operating from 1.22 V to 19 V rails. Using an advanced proprietary architecture, the ADP7105 provides high power supply rejection and low noise, and achieves excellent line and load transient response with only a small 1 μF ceramic output capacitor.
●The ADP7105 is available in three fixed output voltage options and an adjustable version that allows output voltages ranging from 1.22 V to 19 V via an external feedback divider. The ADP7105 allows an external soft start capacitor to be connected to program the startup.
●Note that throughout this data sheet, the sense function (SENSE) of the SENSE/ADJ pin applies to fixed output voltage models only, whereas the adjust input function (ADJ) applies to adjustable output voltage models only. For example, Figure 1 shows the sense function, and Figure 2 shows the adjust input function.
●The ADP7105 output noise voltage is 15 μV rms and is inde-pendent 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.
●The ADP7105 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages. The LFCSP offers a very compact solution and provides excellent thermal performance for applications that require up to 500 mA of output current in a small, low profile footprint.
●APPLICATIONS
● Regulation of noise sensitive applications:
●ADC and DAC circuits, precision amplifiers,
●high frequency oscillators, clocks, and PLLs
● Communications and infrastructure
● Medical and healthcare
● Industrial and instrumentation
●### Features and Benefits
● 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%
● Low quiescent current: 900 μA at
●VIN = 10 V, IOUT = 500 mA
● Low shutdown current: <50 μA at
●VIN = 12 V, stable with small 1 μF ceramic output capacitor
● 3 fixed output voltage options:
●1.8, 3.3 V and 5 V
● See datasheet for additional features
