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 A Low Noise Baseband Circuit Supply Thermal Protection 16 Lead 3x3 mm SMT Package: 9mm 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 excellent rejection of any preceding switching regulator or other power supply noise. The voltage output is ideal for frequency generation subsystems including Hittites broad line of PLLs with integrated VCOs. The output voltage can be adjusted lower than the default value by using one external resistor. The output can be set to 5V by grounding the HV pin. The regulator can be powered down by the TTL-compatible Enable input. The HMC976LP3E is housed in a 3x3mm QFN SMT package. Table 1. Electrical Specifications, T = +25 C A Parameter Conditions Min Typ Max Units Output Voltage VR (Default) Vdd = 5.5V Maximum load current 4.7 4.8 4.9 V Output Voltage VR (5V setting) Vdd = 5.5V Maximum load current 4.9 5 5.1 V Vdd = 5.5V Maximum load current Output Voltage Tolerance 2 % Default and 5V setting Input Voltage Range (Default) Default output voltage configuration 5.1 5.5 V 1 Input Voltage Range For VR>3V 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 Information furnished by Analog Devices is believed to be accurate and reliable. However, no For price, delivery, and to place orders: Analog Devices, Inc., For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 rights of third parties that may result from its use. Specifications subject to change without notice. No 978-250-3343 tel 978-250-3373 fax Order On-line at www.hittite.com Phone: 781-329-4700 Order online at www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 1 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Application Support: apps hittite.com POWER CONDITIONING - SMTHMC976LP3E v02.1112 400mA LOW NOISE, HIGH PSRR LINEAR VOLTAGE REGULATOR Table 1. Electrical Specifications (Continued) Parameter Conditions Min Typ Max Units Vdd = 5.5V REF cannot source/sink Reference Voltage VREF 1.17 V external current 1 Output Current VR T = -40C to +85C 400 mA A Output Noise Spectral Density 4000 10 Hz Vdd = 5.5V VR = 5.0V 120 100 Hz 3 6 nV/rtHz Measured on Application Schematic 1 kHz 3 Maximum Load Current 10 kHz 3 100 kHz 3 Integrated Output Noise 100 Hz to 100 kHz Vdd = 5.5V VR = 5.0V 1.5 Vrms Load Regulation, VR Vdd = 5.5V VR=5.0V 0.01 % / mA PSRR 1 kHz -70 10 kHz -65 Vdd = 5.5V VR=5.0V 100 kHz -45 dB Maximum load current 1 MHz -35 10 MHz -30 50 MHz -20 Output Voltage Variation vs. Package Base Temperature Vdd = 5.5V VR=5.0V 25C to 85C Maximum load current 0.005 0.01 % / C -40C to 25C 0.005 0.01 % / C Ven = Vdd = 5.5V Current Consumption (I ) 1.1 1.5 mA GND Maximum Load Current Vdd = 5.5V EN = Low Output is float- Power Down Current ing (high - impedance) in Power-Down 1 A mode 0 to 90% of final voltage Start-Up Transient Time 200 ms 3 Vdd = 5.5V Enable Input EN High Level Vdd>=VEN 2 Vdd V Enable Input EN Low Level Vdd>=VEN 0 0.8 V To guarantee stability, noise and PSRR 2 3 Output Load Capacitance 4.7 F performance Thermal Protection Threshold Junction Junction Temperature Rising 115 130 C Temperature 4 Thermal Protection Hysteresis 10 C 1 The regulator does not include short-circuit protection circuitry. The outputs will withstand short-circuit conditions for a duration <10s. The thermal protection is not intended to be used as a short circuit protection 2 HMC976LP3E was designed to work with low ESR ceramic capacitors connected to pin 4 VRX. 3 See HMC976LP3E 5.0V User Application Schematic herein 4 See figures 14,15, and 16 Information furnished by Analog Devices is believed to be accurate and reliable. However, no For price, delivery, and to place orders: Analog Devices, Inc., For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824 responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 rights of third parties that may result from its use. Specifications subject to change without notice. No 978-250-3343 tel 978-250-3373 fax Order On-line at www.hittite.com Phone: 781-329-4700 Order online at www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. 2 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Application Support: apps hittite.com POWER CONDITIONING - SMT