HHMCMC992200LLPP55EE v07.1013 AACCTITIVVEE B BIAIASS C COONNTTRROOLLLLEERR Features Single Positive Voltage Supply (5V to 16.5V) Short Circuit Protection (Power Foldback) Adjustable Drain Voltage 3V to 15V Adjustable Over/Under-Current Alarm Adjustable Drain Current up to 500mA Adjustable Low Vdd Voltage Alarm Internal Negative Voltage Generator Automated Power-up Sequencing Active Bias Current Regulation Enable Input for Active Bias Control Stable Bias Current Over Temperature and Trigger-out Output for Daisy Chain Power-Up Process Variation and Aging and Power-Down Sequencing Typical Applications Cellular Base Station Military & Space 13 Wireless Infrastructure Equipment Test Instrumentation Microwave Radio & VSAT Functional Diagram 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, please contact Hittite Microwave Corporation: 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 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 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. 13 - 1 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Order On-line at www.hittite.com DC POWER MANAGEMENT - SMTHMC920LP5E v07.1013 ACTIVE BIAS CONTROLLER General Description HMC920LP5E is an active bias controller which generates a regulated Drain voltage and actively adjusts the gate voltage of an external amplifier to achieve constant bias current. It can be used to bias any enhancement and depletion type amplifiers operating in Class-A regime with Drain voltages (VDRAIN) from 3V to 15V and drain currents (IDRAIN) up to 500mA, offering a complete biasing solution. HMC920LP5E achieves excellent bias stability over supply, temperature and process variations, and eliminates the required calibration procedures used to prevent RF performance degradation due to such variations. The HMC920LP5E is housed in an RoHS compliant 5x5 mm QFN leadless package with an exposed backside pad to improve thermal characteristics. Electrical Specifications, T = +25C, Vdd = Vdd1 = Vdd2 = 15V A Parameter Symbol Conditions Min. Typ. Max. Units Supply Voltage Vdd 5 16.5 V 13 EN = Vdig 35 mA Vdd = 5V EN = GND 20 mA Quiescent Current IDD EN = Vdig 35 mA Vdd = 15V EN = GND 20 mA Negative Voltage Output VNEG -2.5 V Oscillator Frequency FOSC 250 kHz Bandgap Reference VBGC 2 V VDIG Feedback VDIGFB 2.5 V LDOCC Feedback LDOFB 2 V Vinlow 1 V Enable Input Threshold ENTHRS Vinhigh 1.4 V Vinlow 1 V ALMTRIG Input Threshold ALMTRIG Vinhigh 1.4 V Low Vdd Alarm Threshold VddCHK 3.8 V VDRAIN Characteristics DRAIN Current Adjustment Range IDRAIN 0 500 mA DRAIN Current Change Over Supply Voltage 0.05 %/V VDRAIN set to 6V, IDRAINV IDRAIN set to 100mA, DRAIN Current Change Over Temperature 0.03 %/C DRAIN Adjustment Range VDRAIN 3 15 V VDRAIN Change Over Supply Voltage 0.05 %/V VDRAIN set to 6V, VDRAIN IDRAIN set to 100mA, VDRAIN Change Over Temperature 0.008 %/C VNEG Characteristics Negative Voltage Output VNEG -2.5 V VNEG Current Sink INEG 0 60 mA VGATE Characteristics GATE Current Supply IG -4 4 mA VGATE Low Level VG MIN VNEG V VGATE High Level VG MAX VNEG+4.5 V VDIG Characteristics Adjustment Range VDIG 3.5 5 V VDIG Current Source IDIG 30 mA 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, please contact Hittite Microwave Corporation: 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 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 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. 13 - 2 Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D Order On-line at www.hittite.com DC POWER MANAGEMENT - SMT