The Analog Devices ADM7170ACPZ-R7 is a CMOS, low-dropout linear regulator (LDO) that operates from 2.3 V to 6.5 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 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 500 mA load step. The ADM7170ACPZ-R7 is available in 17 fixed-output voltage options. The following voltages are available from stock: 1.3 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, 4.2 V, and 5.0 V. Additional voltages that are available by special order are: 1.5 V, 1.85 V, 2.0 V, 2.2 V, 2.7 V, 2.75 V, 2.8 V, 2.85 V, 3.8 V, and 4.6 V. An adjustable version is also available that allows output voltages that range from 1.2 V to VIN − VDO with an external feedback divider. 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 about 1.0 ms. The ADM7170ACPZ-R7 regulator output noise is 5 μVRMS independent of the output voltage. The ADM7170ACPZ-R7 is available in an 8-lead, 3 mm × 3 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.
Feature
- Input voltage range: 2.3 V to 6.5 V
- Maximum load current: 500 mA
- 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 500 mA load step
- 60 dB PSRR at 100 kHz
- Low dropout voltage: 42 mV at 500 mA load, VOUT = 3 V
- Initial accuracy: ±0.75%
- Accuracy over line, load, and temperature: ±1.25%
- Quiescent current, IGND = 0.7 mA at no load
- Low shutdown current: 0.25 μA at VIN = 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 VIN − VDO
- Precision enable
- Adjustable soft start
- 8-lead, 3 mm × 3 mm LFCSP package
- Supported by ADIsimPower tool
Applications
- Regulation to noise sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICs
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
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