AMS431LBN

Advanced Monolithic Systems FEATURES • Trimmed 0.5% Tolerance • Wide Operating Current Range 60µA to 100mA • Low Reference Input Current 0.4µA • Low Dynamic Output Impedance • Low Output Noise • Nominal Temperature Range to 85°C • Temperature-Compensated: 60ppm/°C AMS431L 1.2V SHUNT REGULATOR RoHS compliant APPLICATIONS • Battery Powered Systems • Switching Power Supplies • Adjustable Power Supplies • Telecommunications • Error Amplifiers • Notebook/Personal Computer • Monitors/ VCR/ TV • Pagers GENERAL DESCRIPTION The AMS431L is a three-terminal adjustable shunt regulator with guaranteed temperature stability over the entire range of operation. The output voltage can be set to any value between 1.24V (VREF) and 20V by adding two external resistors. The AMS431L features 0.5% 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. AMS431 is available in TO-92, SOT-89, 3 pin SOT-23 and 5 pin SOT-23 packages. ORDERING INFORMATION: TOL. ±0.5% ±1.0% ±2.0% TO-92 AMS431LAN AMS431LBN AMS431LCN PACKAGE TYPE SOT-89 AMS431LAL AMS431LBL AMS431LCL 3 LEAD SOT-23 AMS431LAM AMS431LBM AMS431LCM 5 LEAD SOT-23 AMS431LAM1 AMS431LBM1 AMS431LCM1 OPERATING TEMP. RANGE -40 to +85° C -40 to +85° C -40 to +85° C PIN CONNECTIONS TO-92 Plastic Package (N) SOT-89 (L) 3L SOT-23 (M) 5L SOT-23 (M1) ANODE 1 2 3 N/C 1 N/C 2 5 ANODE REF ANODE CATHODE 1 REF 2 3 CATHODE 3 4 REFERENCE ANODE CATHODE REF CATHODE Bottom View Top View Top View Top View Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L ABSOLUTE MAXIMUM RATINGS (Note 1) Cathode Voltage (VZ) Continuous Cathode Current (IZ) Reference Input Current (IREF) Junction Temperature (TJ) Storage temperature Lead Temperature (Soldering, 25sec.) 20V 100mA 3mA -40°C to +125°C -65°C to +150°C 265°C Internal Power Dissipation (PD) TO-92 Package SOT-89 Package SOT-23-3 Package SOT-23-5 Package Thermal Resistance (θJA) TO-92 Package SOT-89 Package SOT-23-3 Package SOT-23-5 Package 0.78W 0.91W 0.28W 0.3 W 160°C/W 110°C/W 410°C/W 410°C/W Note 1 : 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 IZ =10 mA and TA = +25°C unless otherwise noted. Parameter Reference Voltage Deviation of Reference Input Voltage over Temperature Ratio of Change in Reference Voltage to Cathode Voltage Reference Input Current Reference Input Current Deviation over Temperature Off State Cathode Current Dynamic Output Impedance VZ = VREF (circuit 1) TA = -40°C to +85°C IZ = 10mA ∆V = from VREF R1 =10kΩ, R2 = ∞Ω (test circuit 2) R1 =10kΩ, R2 = ∞Ω TA = Full Range (test circuit 2) VZ = 6V, VREF = 0V ( test circuit 3) f < 1KHz, VZ = VREF IZ =100µA to 100mA (test circuit 1) VZ = VREF (test circuit 1) 60 80 60 80 60 80 µA 0.25 0.4 0.25 0.4 0.25 0.4 Ω 0.1 0.4 0.1 0.4 0.1 0.4 µA 0.15 0.5 0.15 0.5 0.15 0.5 µA Conditions Min 1.234 AMS431LA Typ Max 1.240 10 1.246 25 Min 1.228 AMS431LB Typ Max 1.240 10 1.252 25 Min 1.215 AMS431LC Typ Max 1.240 10 1.265 35 Units V mV -0.5 -2.7 -0.5 -2.7 -0.5 -2.7 mV/V 0.04 0.1 0.04 0.1 0.04 0.1 µA Minimum Operating Current RECOMMENDED OPERATING CONDITIONS: Min VREF 80µA Max 20 V 100mA Cathode Voltage, (VZ) Cathode Current, (IZ) Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L TEST CIRCUITS VIN VZ = VREF VIN VZ VIN VZ IREF IZ VREF R1 IREF IZ IZ OFF R2 VREF Figure 1. Test Circuit for VZ=VREF Figure 2. Test Circuit for VREF vs IZ. Test circuit for IREF. Figure 3. Test Circuit for Off-State Current TYPICAL APPLICATIONS VIN R1 VREF R2 GND VOUT 1) Set the VOUT according to the following equation: R1 ⎞ ⎛ VOUT = VREF⎜1 + ⎟ + IREFR1 R2 ⎠ ⎝ 2) Choose the value of R as follows: • • The maximum limit for R should be such that the cathode current, IZ is greater than the minimum operating current (80µA) at VIN(min). The minimum limit for R should b such that IZ does not exceed 100mA under all load conditions, and the instantaneous turn-on value for IZ does not exceed 150mA. Both of the following conditions must be met: Rmin ≥ VIN(max) (to limit instantaneous turn - on IZ ) 150mA Rmin ≥ VIN(max) - VOUT (to limit IZ under normal operating conditions ) IOUT(min) + 100mA Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L TYPICAL PERFORMANCE CHARACTERISTICS Cathode Current vs. Cathode Voltage 300 CATHODE CURRENT (mA) CATHODE CURRENT (µA) 200 100 0 -100 -200 -300 -1 -0.5 0.5 1 0 CATHODE VOLTAGE (V) Reference Input Current vs. Junction Temperature REFERENCE INPUT CURRENT (nA) 150 IZ= 10mA R1= 10kΩ R2= ∞ TA =25° C VR= V REF Cathode Current vs. Cathode Voltage 150 REFERENCE VOLTAGE (V) 100 50 0 -50 -100 -150 -1.5 -1 -0.5 0 0.5 1 CATHODE VOLTAGE (V) T A =25° C VR= VREF Reference Voltage vs. Junction Temperature 1.248 1.246 1.244 1.242 1.240 1.238 1.236 1.234 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (° C) Off State Cathode Current vs. Junction Temperature 250 VREF= 0V IR= 60µA IZ= 100mA 1.5 1.5 ∆VREF/∆VZ(-mV/V) 125 100 75 50 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (° C) Ratio of Delta Reference Voltage to Delta Cathode Voltage vs. Junction Temperature 1.2 1.1 IZ= 10mA ∆VZ= 16V to V REF 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (° C) CATHODE CURRENT(OFF STATE) (nA) 200 150 100 50 0 VR= 16V VZ= 6V -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (° C) Reference Impedance vs. Junction Temperature REFERENCE IMPEDANCE (Ω ) REFERENCE IMPEDANCE (Ω ) 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 -50 -25 0 25 50 75 100 125 150 JUNCTION TEMPERATURE (° C) IZ = 0.1 to 100mA VZ= V REF f< 1kHz Reference Impedance vs. Frequency 100 TA =25° C 10 1 0.1 0.01 1 100 1000 10 FREQUENCY (kHz) 100000 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L TYPICAL PERFORMANCE CHARACTERISTICS (Continued) Small Signal Gain and Phase Shift vs. Frequency 80 SMALL SIGNAL GAIN (dB) 70 60 50 40 30 20 10 0 -10 -20 100 1k 10k 100k FREQUENCY (Hz) 1000k -180 -225 -315 -360 PHASE SHIFT (deg) -270 10µF Small Signal Gain and Phase Shift Test Circuit OUT IZ 15k 232 + 8.25k GND Stability Boundary Condition 3.5 T A =25° C Stability Circuit CATHODE CURRENT (mA) 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.001 VZ = 2V VZ = V REF Stable Stable + - IZ R1 CL R2 0.01 1 0.1 LOAD CAPACITANCE (µF) 10 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted. 3L TO-92 PLASTIC PACKAGE (N) 0.060±0.005 (1.524±0.127) DIA 0.180±0.005 (4.572±0.127) 0.060±0.010 (1.524±0.254) 0.140±0.010 (3.556±0.127) 0.180±0.005 (4.572±0.127) 0.90 (2.286) NOM 5° NOM 0.500 (12.70) MIN 10° NOM 0.050 (1.270) MAX UNCONTROLLED LEAD DIMENSIONS 0.050±0.005 (1.270±0.127) 0.016±0.003 (0.406±0.076) 0.015±0.002 (0.381±0.051) N (TO-92 ) AMS DRW# 042391 5 LEAD SOT-23 PLASTIC PACKAGE (M1) 0.110-0.120 (2.794-3.048) 0.102-0.118 (2.60-3.00) 0.059-0.070 (1.50-1.75) 0.037 (0.95) TYP 0.018-0.024 (0.457-0.610) 0.014-0.020 (0.350-0.50) 10° NOM 0.036-0.051 (0.090-1.30) 0.0035-0.0080 (0.090-0.20) 0.003 (0.150) MAX 0.075 (1.90) TYP 10° NOM 0.018-0.024 (0.457-0.610) (SOT-23-5 ) AMS DRW# 051001 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS431L PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted (Continued). 3 LEAD SOT-23 PLASTIC PACKAGE (M) 0.110-0.120 (2.794-3.048) 0.015-0.017 (0.381-0.432) 0.083-0.098 (2.108-2.489) 0.047-0.055 (1.194-1.397) 0.035-0.040 (0.889-1.016) 0.018-0.024 (0.457-0.610) 10° NOM 0.035-0.041 (0.089-1.041) 0.0034-0.0050 (0.086-0.127) 0.0005-0.0040 (0.013-0.102) 0.070-0.080 (1.778-2.032) 10° NOM 0.018-0.024 (0.457-0.610) (SOT-23 ) AMS DRW# 051991 SOT-89 PLASTIC PACKAGE (L) 0.173-0.181 (4.40-4.60) 0.064-0.072 (1.62-1.83) 0.055-0.063 (1.40-1.60) 0.014-0.017 (0.35-0.44) 0.155-0.167 (3.94-4.25) 0.090-0.102 (2.29-2.60) 0.084-0.090 (2.13-2.29) 0.035-0.047 (0.89-1.20) 0.059 (1.50) BSC 0.118 (3.00) BSC 0.014-0.019 (0.36-0.48) 0.017-0.022 (0.44-0.56) L (SOT-89 ) AMS DRW# 042392 Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723