AHK432 Adjustable Low Voltage Shunt Regulator General Description Features The AHK432 is a low voltage adjustable shunt reference with thermal stability guaranteed over the full industrial temperature range. This 3-terminal regulator has an output voltage range that extends from VREF (1.24V) to 20V, giving designers outstanding flexibility in the development of power supplies and instrumentation. With a low operating current of 60µA, the AHK432 is well suited for battery-powered portable electronic applications. It also has a sharp turn-on characteristic and a dynamic resistance of only 50mW making it an excellent replacement for zener diodes in low tempco designs. • • • • • • The AHK432 is available in the surface-mount 3 or 5 pin SOT-23, as well as the through hole TO-92. Three voltage tolerance options are offered in each package: ±0.5%, ±1%, and ±2%. • • • • • • • PowerManager SmartSwitch™™ Wide output voltage range (1.24 to 20V) Operating current from 60µA to 100mA Low dynamic output resistance of 50mΩ ±0.5% trimmed voltage reference 10mV typ. VREF deviation, from -40 to +105°C Surface mount 3 or 5 pin SOT-23 or throughhole 3 pin TO-92 packages Notebook computers Isolated feedback in switching power supplies Adjustable and programmable supplies Linear regulators (External Reference) Instrumentation Medical Electronics* Global voltage reference for multiple power supplies Typical Application IN RL OUT R1 Adjustable regulator: AHK432 R2 432.2001.11.0.96 OUT = VREF R1 + R2 R2 1 Preliminary Information Applications AHK432 Adjustable Low Voltage Shunt Regulator Absolute Maximum Ratings Symbol VZ IZ (TA=25°C unless otherwise noted) Description IREF TJ Cathode Voltage Continuous Cathode Current Reference Current Operating Junction Temperature Range ΘJA Maximum Thermal Resistance PD Maximum Power Dissipation TLEAD TO-92 SOT-23-3, SOT-23-5 TO-92 SOT-23-3, SOT-23-5 Maximum Soldering Temperature (at Leads) Value Units 20 100 3 -40 to 150 160 410 780 300 260 V mA mA °C °C/W mW °C Note: Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any one time. Electrical Characteristics (TJ=25°C unless otherwise noted) AHK432 0.5% Symbol VREF Description Conditions Reference VZ=VREF IZ=10mA Voltage (test circuit 1) min typ AHK432 1.0% max min typ AHK432 2.0% Max min typ max Units TA=25°C 1.234 1.240 1.246 1.228 1.240 1.252 1.215 1.240 1.265 V TA=-40 1.222 to +105°C 1.258 1.215 1.265 1.200 1.280 VDEV VREF Temp Deviation TA=-40 to +105°C, VZ=VREF, IZ=10mA (test circuit 1) 10 25 10 25 10 25 mV ∆VREF/∆VZ Ratio of Change in VREF to Change in Cathode Voltage IZ=10mA, ∆VZ=16V to VREF (test circuit 2) -1.0 -2.7 -1.0 -2.7 -1.0 -2.7 mV/V IREF Reference Input Current R1=10kΩ, R2=∞ , IZ=10mA (test circuit 2) 0.15 0.5 0.15 0.5 0.15 0.5 µA IREF(DEV) IREF Temp Deviation TA=-40 to +105°C R1=10kΩ , R2=∞ , IZ=10mA (test circuit 2) 0.1 0.4 0.1 0.4 0.1 0.4 µA µA Off State VREF=0V VZ=6V 0.04 0.1 0.04 0.1 0.04 0.1 Cathode Current (test circuit 3) VZ=16V 0.04 0.5 0.04 0.5 0.04 0.5 RZ Dynamic Output Impedance f<1kHz, VZ=VREF, IZ=100mA to 100mA (test circuit 1) 0.05 0.2 0.05 0.2 0.05 0.2 Ω IZ(MIN) Minimum Operating Current VZ=VREF (test circuit 1) 60 80 60 80 60 80 µA IZ(OFF) 2 432.2001.11.0.96 AHK432 Adjustable Low Voltage Shunt Regulator Test Circuits Test Circuit 1 Test Circuit 2 OUT IN IZ OUT IN OUT IN IZ IREF 432.2001.11.0.96 Test Circuit 3 IREF IZ(off) 3 AHK432 Adjustable Low Voltage Shunt Regulator Typical Characteristics (Unless otherwise noted, TA = 25°C, IZ = 10mA) Cathode Current vs. Cathode Voltage Cathode Current vs. Cathode Voltage 200 Cathode Current (µA) Cathode Current (mA) 15 10 5 0 -5 -10 -15 150 100 50 0 -50 -100 -150 -200 -1 -0.5 0 0.5 1 1.5 -1 -0.5 0 Cathode Voltage ( V) Reference Voltage vs. Temperature Reference Curre nt (nA) Reference Voltage (V ) 1.5 180 IZ=10mA 1.248 1.244 1.24 1.236 1.232 -50 -25 0 25 50 75 100 125 160 IZ=10mA R1=10kΩ R2=Open 140 120 100 80 60 40 20 0 -50 -25 Junction Temperature (°C) 0 25 50 75 100 125 Junction Temperatur e (°C) Ratio of ∆VREF / ∆VZ vs. Temperature Cathode Current vs. Temperature 80 0 VZ=5V VREF=0V (Off-state) 70 60 IZ=10mA dVZ=VREF to 16V -100 Ratio (µV/V) Cathode Current (nA) 1 Reference Current vs. Temperature 1.252 50 40 30 20 -200 -300 -400 -500 10 0 -600 -50 -25 0 25 50 75 Junction Temperature (°C) 4 0.5 Cathode Voltage (V) 100 125 -50 -25 0 25 50 75 100 125 Junction Temperature (°C) 432.2001.11.0.96 AHK432 Adjustable Low Voltage Shunt Regulator (Unless otherwise noted, TA = 25°C, IZ = 10mA) Impedance vs. Frequency Cathode Impedance vs. Temperature 10 Impedance (Ω) Normalized Impedance 16% 12% 8% 4% 1 0.1 0% -4 % -50 -25 0 25 50 75 100 0.01 1.E+01 125 1.E+02 1.E+03 1.E+04 1.E+05 VOUT Gain (dB) Gain and Phase vs. Frequency 120 180 100 150 80 120 60 90 40 60 20 30 0 -20 1.E+01 1.E+06 Frequency ( Hz ) Junction Temperature (°C) VIN 169 Ω 13.7k AHK432 5V 8.25k 0 1.E+02 1.E+03 1.E+04 1.E+05 -30 1.E+06 Test Circuit for Voltage Gain and Phase Frequency (Hz) Stability Boundary 1k 100 IZ Current (mA) 80 Stable R1=10k Stable 60 CL AHK432 40 Unstable R2 20 VREF=VZ 0 10.E+0 100.E+0 1.E+3 10.E+3 100.E+3 Load Capacitance (pF) 432.2001.11.0.96 1.E+6 10.E+6 Test Circuit for Stability 5 AHK432 Adjustable Low Voltage Shunt Regulator Functional Block Diagram Symbol Diagram CATHODE CATHODE REF REF VREF=1.24V ANODE ANODE Ordering Information Package Bulk or Tape and Reel SOT-23-3 SOT-23-5 Bulk TO-92 SOT-23-3 Tape and Reel SOT-23-5 TO-92 Ammo Tolerance 0.5% 1.0% 2.0% N/A N/A N/A N/A N/A N/A AHK432ILY-.5-B1 AHK432ILY-1-B1 AHK432ILY-2-B1 AHK432IGY-.5-T1 AHK432IGY-1-T1 AHK432IGY-2-T1 AHK432IGV-.5-T1 AHK432IGV-1-T1 AHK432IGV-2-T1 AHK432ILY-.5-A1 AHK432ILY-1-A1 AHK432ILY-2-A1 * LIFE SUPPORT POLICY AnalogicTech's PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF Advanced Analogic Technologies Inc. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 6 432.2001.11.0.96 AHK432 Adjustable Low Voltage Shunt Regulator Pin Configuration 5-lead SOT-23 (Top View) 3-lead SOT-23 (Top View) Reference 1 3 Cathode N/C N/C Cathode Anode 2 1 5 2 3 4 TO-92 (Top View) Anode Reference 1 Anode 2 Cathode 3 Reference Package Information TO-92 M L A e F G E H b D 01(2X) 02(2X) 432.2001.03.0.95 C Dim A1 R2.00 A A1 b C D E e F G H L θ1 θ2 Millimeters Min Max 2.40 2.60 0.70 0.90 0.35 0.55 0.00 0.00 2.80 3.20 3.80 4.20 0.00 0.00 1.91 2.31 3.35 3.75 0.00 0.15 13.80 14.20 2° 5° Inches Min Max 0.094 0.102 0.028 0.036 0.014 0.022 0.000 0.000 0.110 0.126 0.149 0.165 0.000 0.000 0.075 0.091 0.132 0.148 0.000 0.006 0.543 0.559 2° 5° Note: PACKAGE OUTLINE EXCLUSIVE OF ANY MOLD FLASHES AND BURR DIMENSION 7 AHK432 Adjustable Low Voltage Shunt Regulator SOT-23-3 D Dim S1 E A A1 A2 b C D E e H L S S1 θ1 H e S A A2 Q1 A1 L SOT-23-5 e Dim S1 H E D A A2 A1 S b c I L Inches Min Max 0.034 .040 0.0005 .004 0.015 0.020 0.003 0.007 0.110 0.120 0.047 0.055 0.070 0.080 0.083 0.104 0.027 0.018 0.024 0.035 0.040 0° 8° Note: 1. PACKAGE BODY SIZE EXCLUDE MOLD FLASH PROTRUSIONS OR GATE BURRS. 2. TOLERANCE ±0.1000 mm (4mi) UNLESS OTHERWISE SPECIFIED 3. COPLANARITY: 0.1000 4. DIMENSION L IS MEASURED IN GAGE PLANE C b Millimeters Min Max .887 1.02 .013 0.10 0.37 0.51 0.085 0.180 2.80 3.04 1.20 1.40 1.78 2.05 2.10 2.64 0.69 0.45 0.60 0.89 1.03 0° 8° A A1 A2 b c D E e H L S S1 Θ Millimeters Min Max 0.95 1.45 0.05 0.15 0.90 1.30 0.35 0.50 0.08 0.20 2.84 3.00 1.50 1.70 1.90 2.60 3.00 0.35 0.55 0.47 0.55 .95 0° 10° Inches Min Max 0.037 0.057 0.002 0.006 0.035 0.051 0.014 0.019 0.003 0.078 0.112 0.112 0.059 0.067 0.0748 0.102 0.118 .0137 .0216 0.019 .0216 0.037 0° 10° Advanced Analogic Technologies, Inc. 1250 Oakmead Parkway, Suite 310, Sunnyvale, CA 94086 Phone (408) 524-9684 Fax (408) 524-9689 8 432.2001.11.0.96