ADM7172-KGD Datasheet

• Input voltage range: 2.3 V to 6.5 V
• Maximum load current: 2 A
• Low noise: 5 µV rms independent of output voltage at 100 Hz to 100 kHz
• Fast transient response: 1.5 μs for 1 mA to 1.5 A load step
• 60 dB PSRR at 100 kHz
• Low dropout voltage: 172 mV at 2 A load, V_OUT = 3 V
• Initial accuracy: −0.5% (minimum), +1% (maximum)
• Accuracy over line, load, and temperature: ±1.5%
• Quiescent current, I_GND = 0.7 mA with no load
• Low shutdown current: 0.25 μA at V_IN = 5 V
• Stable with small 4.7 µF ceramic output capacitor
• Adjustable and fixed output voltage options: 1.2 V to 5.0 V
• Adjustable output from 1.2 V to V_IN − V_DO
• Precision enable
• Adjustable soft start

• Regulation to noise sensitive applications: analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuits, precision amplifiers, phase-locked loops (PLLs)/ voltage controlled oscillators (VCOs), and clocking ICs
• Communications and infrastructure
• Medical and healthcare
• Industrial and instrumentation

The ADM7172-KGD is a CMOS, low dropout linear regulator (LDO) that operates from 2.3 V to 6.5 V and provides up to 2 A of output current. This high output current LDO is ideal for regulation of high performance analog and mixed-signal circuits operating from 6 V down to 1.2 V rails. Using an advanced proprietary architecture, the device provides high power supply rejection and low noise and achieves excellent line and load transient response with just a small 4.7 µF ceramic output capacitor. Load transient response is typically 1.5 μs for a 1 mA to 1.5 A load step.

The ADM7172-KGD is available in a 4.2 V fixed output voltage option. Additional voltages that are available by special order are 1.3 V, 1.5 V, 1.8 V, 1.85 V, 2.0 V, 2.2 V, 2.5 V, 2.7 V, 2.75 V, 2.8 V, 2.85 V, 3.0 V, 3.8 V, 3.3 V, 4.2 V, 4.6 V, 5.0 V, and an adjustable output option.

Inrush current can be controlled by adjusting the start-up time via the soft start pin. The typical start-up time with a 1 nF soft start capacitor is 1.0 ms.

The ADM7172-KGD regulator output noise is 5 μV rms, independent of the output voltage.

Additional application and technical information can be found in the ADM7172 data sheet.