Datasheet HMC976LP3E (Analog Devices)

HMC976LP3E
v02.1112
400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Typical Applications Features
The HMC976LP3E is ideal for: High Output Current: 400mA • Test Instrumentation Low Dropout: 300mV at 400mA Output and VR>3V • Military Radios, Radar and ECM Ultra Low Noise: 3nV/√Hz at 10 kHz, 6nV/√Hz at 1 kHz • Basestation Infrastructure High Power Supply Rejection Ratio (PSRR): • Ultra Low Noise Frequency Generation <-60 dB at 1 kHz, <-30 dB at 1 MHz • Fractional-N Synthesizer Supply Adjustable Voltage Output: VR 1.8 to 5V at 400mA • Microwave VCO Supply Designed to work with low ESR ceramic capacitors • Mixed-Signal Circuit Supply Low Power-Down Current: <1 µA • Low Noise Baseband Circuit Supply Thermal Protection 16 Lead 3x3 mm SMT Package: 9mm²
Functional Diagram General Description
The HMC976LP3E is a BiCMOS ultra low noise linear voltage regulator. The high Power Supply Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz range provides excel ent rejection of any preceding T switching regulator or other power supply noise. M The voltage output is ideal for frequency generation subsystems including Hittite’s broad line of PLLs with integrated VCOs. G - S The output voltage can be adjusted lower than the IN default value by using one external resistor. The output can be set to 5V by grounding the HV pin. The regulator N can be powered down by the TTL-compatible Enable IO input. The HMC976LP3E is housed in a 3x3mm QFN IT SMT package. D N O
Table 1. Electrical Specifications, TA = +25 °C
R C Parameter Conditions Min Typ Max Units E Output Voltage VR (Default) Vdd = 5.5V; Maximum load current 4.7 4.8 4.9 V W Output Voltage VR (5V setting) Vdd = 5.5V; Maximum load current 4.9 5 5.1 V O Vdd = 5.5V; Maximum load current; P Output Voltage Tolerance 2 % Default and 5V setting Input Voltage Range (Default) Default output voltage configuration 5.1 5.5 V Input Voltage Range For VR>3V[1] VDD>VR+0.3V 3.3 5.5 V Output Voltage Range VR Set by external resistors. 1.8 5.1 V [1] See Absolute Maximum Ratings Table “Absolute Maximum Ratings” Info F rmoatr p ion rfiucrneis, d hed ebliy vAenraly a og n De d t vice o p s is lbaelciee o ved rtd o e b r e sa: H ccur iattte ite M and reliicarbloew . H aove C wever, o n r o For price, delivery, and to place orders: Analog Devices, Inc., responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other poration, 2 Elizabeth Drive, Chelmsford, MA 01824 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 1 978-250-3343 tel • 978-250-3373 fax • O rights of third parties that may result from its use. Specifications subject to change without notice. No rd P e h r O one n : 7 -li 81n - e a 329- t w 470 ww.h 0 • O it rd t e ite r o . n c li o n m license is granted by implication or otherwise under any patent or patent rights of Analog Devices. e at www.analog.com Application S Trademarks and registered trademarks are the property of their respective owners. upport: apps@ A h ppitlitcite ati .oco n Sm upport: Phone: 1-800-ANALOG-D