Advanced Monolithic Systems

Transcription

1 Advanced Monolithic Systems FEATURES Trimmed.% Tolerance Wide Operating Current Range.µA to ma Low Reference Input Current.nA Low Dynamic Output Impedance Low Output Noise Nominal Temperature Range to C Temperature-Compensated: ppm/ C Low supply current: typ. µa APPLICATIONS Battery Powered Systems Switching Power Supplies Isolated Power Supplies Telecommunications Error Amplifiers Notebook/Personal Computer Monitors/ VCR/ TV Opto-isolator driver AMS.V SHUNT REGULATOR RoHS compliant GENERAL DESCRIPTION The AMS is a four-terminal adjustable open collector shunt regulator with guaranteed temperature stability over the entire range of operation. The output voltage can be set to any value between.v (V REF ) and V by adding two external resistors. The AMS features.% initial tolerance, low dynamic output impedance and operates over a wide current range. Due to the sharp turn-on characteristics this device is an excellent replacement for Zener diodes in many applications. AMS is available pin SOT-3 packages. ORDERING INFORMATION: PIN CONNECTIONS TOL. Package LEAD SOT-3 OPERATING TEMP. RANGE ±.% AMSAM - to + C ±.% AMSBM - to + C ±.% AMSCM - to + C BLOCK DIAGRAM VCC GND L SOT-3 (M) N/C 3 COLL REF V CC Top View Co Ref + -.V GND Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

2 ABSOLUTE MAXIMUM RATINGS (Note ) Supply Voltage (V CC ) V Internal Power Dissipation (P D ) Continuous Collector Current (I C ) ma SOT-3- Package.3 W Reference Input Current (I REF ).ma Junction Temperature (T J ) - C to + C Thermal Resistance (θ JA ) Storage temperature -6 C to + C SOT-3- Package C/W Lead Temperature (Soldering, sec.) 6 C Note : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. ELECTRICAL CHARACTERISTICS Electrical Characteristics at I COL = ma and T A = + C unless otherwise noted. Parameter Conditions AMSA Min Typ Max AMSB Min Typ Max AMSC Min Typ Max Units Reference Voltage mv Deviation of Reference Voltage over Temperature Change in Reference Voltage to Supply Voltage Reference Input Current V COL = V REF T A = - C to + C I COL = µa Vcc=.V to V I COL =.µa to ma mv..... mv.... na Reference Input Current Deviation over Temperature Off State Collector Current Dynamic Output Impedance Minimum Operating Current I COL =.µa to ma T A = Full Range na V REF = V na f < KHz, I COL = na to ma Ω V COL = V REF... na Input Supply Current I COL = µa µa RECOMMENDED OPERATING CONDITIONS: Min Max Collector Voltage, (V COL ) V REF V Collector Current, (I COL ) µa ma Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

3 TYPICAL APPLICATIONS.V VCC V.V to V.µF K Ref + -.7µF K VO.V.V K pf LOW NOISE PRECISSION.V REFERENCE.V V CC V.µ Q V O R 3 + R -.7µF Co.V R GND Low cost LDO using an External PNP Set the V OUT according to the following equation: R VOUT = VREF + + IREFR R Maximum output current is (PNP Hfe)mA. The transistor current rating and package depends of the application dropout. The power dissipation for the PNP transistor is Iout (Vin-). The package type should be selected according to the Power dissipation. Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

4 TYPICAL PERFORMANCE CHARACTERISTICS.8.6 change Output voltage vs. Supply µa.6.. Output resistance Vs load mv. change.3 output res Vcc Load step ma ua 3 Supply Current vs Input load 3 Volts IVcc ua ua Supply current vs load E-6.E-.E-.E-3.E- Load Ivcc ua Very low current regulation Input output transfer characteristic Volts E- 9.E-.E- 8 7.E-.E- 6.E-.E- 3 Volts ouptut load Volts input Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

5 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) PSRR Output rejection Load k /n -3 db db E+3.E+.E+.E+6 Hz Hz Input Bias Current 6 na 3 Ibias Volts ma load VCC=V, Output Cap= nf ma load Transient at VCC=V, Output Cap=nF Fast Start up -V with common supply Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

6 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Slow Start up -V with common supply Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73

7 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. LEAD SOT-3 PLASTIC PACKAGE (M).-. ( ).-.8 (.6-3.).9-.7 (.-.7).37 (.9) TYP.-. (.3-.).8-. (.7-.6) NOM.36-. (.9-.3).3-.8 (.9-.).3 (.) MAX.7 (.9) TYP NOM.8-. (.7-.6) (SOT-3- ) AMS DRW# Advanced Monolithic Systems, Inc. Phone (9) 3-7 Fax (9) 3-73