ADM7155 600 mA, Ultralow Noise, High PSRR, RF Linear Regulator

The ADM7155 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 600 mA of load current. Output voltages from 1.2 V to 3.4 V are possible depending on the model. Using an advanced proprietary architecture, it provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 µF ceramic output capacitor.

The ADM7155 is available in four models that optimize power dissipation and PSRR performance as a function of input and output voltage.

The ADM7155 regulator typical output noise is 0.9 μV rms from 100 Hz to 100 kHz for fixed output voltage options and 1.5 nV/√Hz for noise spectral density from 10 kHz to 1 MHz. The ADM7155 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages, making it not only a very compact solution but also providing excellent thermal performance for applications requiring up to 600 mA of load current in a small, low profile footprint.

Applications

Regulation to noise sensitive applications: PLLs, VCOs, and PLLs with integrated VCOs
Communications and infrastructure
Backhaul and microwave links

Features and Benefits

Input voltage range: 2.3 V to 5.5 V

Output voltage range: 1.2 V to 3.4 V

Maximum load current: 600 mA

Low noise

0.9 μV rms total integrated noise from 100 Hz to 100 kHz
1.6 μV rms total integrated noise from 10 Hz to 100 kHz

0.9 μV rms total integrated noise from 100 Hz to 100 kHz

1.6 μV rms total integrated noise from 10 Hz to 100 kHz

Noise spectral density: 1.5 nV/√Hz from 10 kHz to 1 MHz

PSRR: >90 dB from 200 Hz to 200 kHz; 57 dB at 1 MHz

Dropout voltage: 120 mV typical at VOUT = 3.3 V, IOUT = 600 mA

Initial accuracy: ±0.5%

Accuracy over line, load, and temperature: −2.0% (minimum), +1.5% (maximum)

Quiescent current, IGND = 4 mA at no load

Low shutdown current: 0.2 μA

Stable with a 10 μF ceramic output capacitor

8-lead LFCSP and 8-lead SOIC packages

Precision enable

Supported by ADIsimPower tool

Power Management

Linear Regulators

Design Tools

ADI Linear Regulator Design Tool and Parametric Search .

Data Sheets

Document	note
ADM7155: 600 mA, Ultralow Noise, High PSRR, RF Linear Regulator Data Sheet (Rev. C)	PDF 700.85 K

User Guides

Document	note
UG-696: Evaluating the ADM7154 and ADM7155 Linear Regulators	PDF 299.75 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 1000+	RoHS
ADM7155ACPZ-01-R7 Production	8 ld LFCSP (3x3mm 2.44x1.6EP)	REEL 1500	-40 to 125C	2.14	Y
ADM7155ACPZ-02-R7 Production	8 ld LFCSP (3x3mm 2.44x1.6EP)	REEL 1500	-40 to 125C	2.14	Y
ADM7155ACPZ-03-R7 Production	8 ld LFCSP (3x3mm 2.44x1.6EP)	REEL 1500	-40 to 125C	2.14	Y
ADM7155ACPZ-04-R7 Production	8 ld LFCSP (3x3mm 2.44x1.6EP)	REEL 1500	-40 to 125C	2.14	Y
ADM7155ARDZ-01-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	2.49	Y
ADM7155ARDZ-02-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	2.49	Y
ADM7155ARDZ-03-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	2.49	Y
ADM7155ARDZ-04-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	2.49	Y