8

For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

978-250-3343 tel • 978-250-3373 fax • Order On-line at www.hittite.com

Application Support: apps@hittite.com

HMC976LP3E

400mA LOW NOISE, HIGH PSRR

LINEAR VOLTAGE REGULATOR

v02.1112

Operational Features

voltage of 4.8V nominal. The values shown are those recommended for optimum Noise Spectral density. For users

requiring extremely low noise in the 1 MHz to 10 MHz range the largest output capacitor should be used: a 68uF takes

the noise between 100 kHz and 1 MHz to below 2.5nV/√Hz.

Load Capacitor Characteristics

The HMC976LP3E was designed to work with a low ESR ceramic load capacitor on the VRX pin (C21 in the

schematic above). Low ESR ceramic capacitors are very small and best for eliminating high frequency noise. Ceramic

capacitors can vary as much as 50% versus temperature and 60% versus voltage, dependant on the ceramic type

e.g. Z5U, Y5V, X7R or X5R. There are no restrictions on ceramic type or minimum ESR, only that the user must

guarantee that the minimum output capacitance over operating conditions is 4.7μF, smaller values can result in noise

peaking or lower stability.

Figure 13. Evaluation PCB Schematic

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

For price, delivery, and to place orders: Analog Devices, Inc.,

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106

Phone: 781-329-4700 • Order online at www.analog.com

Application Support: Phone: 1-800-ANALOG-D