ADM7170 Series

6.5 V, 500mA, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

Catalog

6.5 V, 500mA, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

Part	Control Features	Number of Regulators	Mounting Type	Voltage - Output (Min/Fixed)	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Voltage - Input (Max) [Max]	Protection Features	Current - Output	Output Configuration	Output Type	Current - Supply (Max) [Max]	Supplier Device Package	Current - Quiescent (Iq)	Voltage Dropout (Max) [Max]	PSRR [Min]	PSRR [Max]	Voltage - Output (Max) [Max]	Output Type
Analog Devices ADM7170ACPZ-1.3-R7	Enable Soft Start	1	Surface Mount	1.3 V	125 °C	-40 °C	8-WFDFN Exposed Pad CSP	6.5 V	Over Current Over Temperature	500 mA	Positive	1.81 mOhm	5.1 mA	8-LFCSP-WD (3x3)	2 mA
Analog Devices ADM7170ACPZ-2.5-R7	Enable Soft Start	1	Surface Mount	2.5 V	125 °C	-40 °C	8-WFDFN Exposed Pad CSP	6.5 V	Over Current Over Temperature	500 mA	Positive	1.81 mOhm	5.1 mA	8-LFCSP-WD (3x3)	2 mA
Analog Devices ADM7170ACPZ-1.8-R7	Enable Soft Start	1	Surface Mount	1.8 V	125 °C	-40 °C	8-WFDFN Exposed Pad CSP	6.5 V	Over Current Over Temperature	500 mA	Positive	1.81 mOhm	5.1 mA	8-LFCSP-WD (3x3)	2 mA
Analog Devices ADM7170ACPZ-3.0-R7	Enable Soft Start	1	Surface Mount		125 °C	-40 °C	8-WFDFN Exposed Pad CSP	6.5 V	Over Current Over Temperature	500 mA	Positive	1.81 mOhm	5.1 mA	8-LFCSP-WD (3x3)	2 mA	0.07 V	60 db	20 dB
Analog Devices ADM7170ACPZ-R7	Enable Soft Start	1	Surface Mount	1.2 V	125 °C	-40 °C	8-WFDFN Exposed Pad CSP	6.5 V	Over Current Over Temperature	500 mA	Positive		5.1 mA	8-LFCSP-WD (3x3)	2 mA	0.07 V	60 db	20 dB	5.8 V	Adjustable

Catalog

6.5 V, 500mA, Ultralow Noise, High PSRR, Fast Transient Response CMOS LDO

Key Features

• 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

Description

The ADM7170 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 ADM7170 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− VDOwith 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 ADM7170 regulator output noise is 5 μV rms independent of the output voltage. The ADM7170 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.ApplicationsRegulation to noise sensitive applications: ADC and DAC circuits, precision amplifiers, PLLs/VCOs, and clocking ICsCommunications and infrastructureMedical and healthcareIndustrial and instrumentation