ADP7157 1.2 A, Ultralow Noise, High PSRR, Adjustable Output, RF Linear Regulator

The ADP7157 is an adjustable linear regulator that operates from 2.3 V to 5.5 V and provides up to 1.2 A of output current. Output voltages from 1.2 V to 3.3 V are possible depending on the model. Using an advanced proprietary architecture, the device provides high power supply rejection and ultralow noise, achieving excellent line and load transient response with only a 10 μF ceramic output capacitor.

The ADP7157 is available in four models that optimize power dissipation and PSRR performance as a function of the input and output voltage.

The typical output noise the ADP7157 regulator is 0.9 μV rms from 100 Hz to 100 kHz and 1.7 nV/√Hz for noise spectral density from 10 kHz to 1 MHz. The ADP7157 is available in 10-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 1.2 A of output current in a small, low profile footprint.

Applications

Features and Benefits

Input voltage range: 2.3 V to 5.5 V

Adjustable output voltage range (VOUT): 1.2 V to 3.3 V

Maximum load current: 1.2 A

Low noise

0.9 μV rms typical output noise from 100 Hz to 100 kHz

1.6 μV rms typical output noise from 10 Hz to 100 kHz

Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz

Power supply rejection ratio (PSRR)

82 dB from 1 kHz to 100 kHz

55 dB at 1 MHz

Dropout voltage: 120 mV typical at IOUT = 1.2 A, VOUT = 3.3 V

Initial accuracy: ±0.6% at ILOAD = 10 mA

Accuracy over line, load, and temperature: ±1.5%

See data sheet for additional features

Power Management

Linear Regulators

Design Tools

ADI Linear Regulator Design Tool and Parametric Search .

Data Sheets

Document	note
ADP7157: 1.2 A, Ultralow Noise, High PSRR, RF Linear Regulator Data Sheet (Rev. A)	PDF 1.04 M

User Guides

Document	note
UG-810: Evaluating the ADP7157 Ultralow Noise, 1.2 A, Adjustable Output, RF Linear Regulator (Rev. A)	PDF 218.81 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADP7157ACPZ-01-R7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	3.26	2.69	Y
ADP7157ACPZ-02-R7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	3.26	2.69	Y
ADP7157ACPZ-03-R7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	3.26	2.69	Y
ADP7157ACPZ-04-R7 Production	10 ld LFCSP (3x3mm)	REEL 1500	-40 to 125C	3.26	2.69	Y
ADP7157ARDZ-01-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	3.26	2.69	Y
ADP7157ARDZ-02-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	3.26	2.69	Y
ADP7157ARDZ-03-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	3.26	2.69	Y
ADP7157ARDZ-04-R7 Production	8 ld SOIC-EP	REEL 1000	-40 to 125C	3.26	2.69	Y

Evaluation Boards

Part Number	Description	Price	RoHS
ADP7157CP-04-EVALZ	Evaluation Board	49	Y

ADP7157: 1.2 A, Ultralow Noise, High PSRR, RF Linear Regulator Data Sheet (Rev. A) adp7157

ADI Linear Regulator Design Tool and Parametric Search adp2108

UG-810: Evaluating the ADP7157 Ultralow Noise, 1.2 A, Adjustable Output, RF Linear Regulator (Rev. A) adp7157