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Adjustable Low Voltage Shunt Regulator General Description 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 60A, 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 50m 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%. AHK432 Features * * * * * * PowerManagerTM SmartSwitch TM Wide output voltage range (1.24 to 20V) Operating current from 60A to 100mA Low dynamic output resistance of 50m 0.5% trimmed voltage reference 10mV typ. VREF deviation, from -40 to +105C Surface mount 3 or 5 pin SOT-23 or throughhole 3 pin TO-92 packages Applications * * * * * * * 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: OUT = VREF R1 + R2 R2 AHK432 R2 432.2004.04.1.0 1 Adjustable Low Voltage Shunt Regulator Absolute Maximum Ratings Symbol VZ IZ IREF TJ JA PD TLEAD AHK432 (TA=25C unless otherwise noted) Value 20 100 3 -40 to 150 160 410 780 300 260 Description Cathode Voltage Continuous Cathode Current Reference Current Operating Junction Temperature Range Maximum Thermal Resistance Maximum Power Dissipation Maximum Soldering Temperature (at Leads) TO-92 SOT-23-3, SOT-23-5 TO-92 SOT-23-3, SOT-23-5 Units 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 Symbol Description Reference Voltage VREF Temp Deviation Ratio of Change in VREF to Change in Cathode Voltage Reference Input Current IREF Temp Deviation (TJ=25C unless otherwise noted) AHK432 0.5% AHK432 1.0% typ AHK432 2.0% max Units Conditions VZ=VREF IZ=10mA (test circuit 1) TA=-40 to +105C, VZ=VREF, IZ=10mA (test circuit 1) IZ=10mA, VZ=16V to VREF (test circuit 2) R1=10k, R2=, IZ=10mA (test circuit 2) TA=-40 to +105C R1=10k, R2=, IZ=10mA (test circuit 2) VREF=0V (test circuit 3) f<1kHz, VZ=VREF, IZ=100A to 100mA (test circuit 1) VZ=VREF (test circuit 1) VZ=6V VZ=16V min typ max min Max min typ TA=25C 1.234 1.240 1.246 1.228 1.240 1.252 1.215 1.240 1.265 TA=-40 1.222 to +105C 10 V 1.258 1.215 25 10 1.265 1.200 25 10 1.280 25 mV VREF VDEV VREF/VZ -1.0 -2.7 -1.0 -2.7 -1.0 -2.7 mV/V IREF 0.15 0.5 0.15 0.5 0.15 0.5 A IREF(DEV) 0.1 0.4 0.1 0.4 0.1 0.4 A IZ(OFF) RZ Off State Cathode Current Dynamic Output Impedance Minimum Operating Current 0.04 0.04 0.05 0.1 0.5 0.2 0.04 0.04 0.05 0.1 0.5 0.2 0.04 0.04 0.05 0.1 0.5 0.2 A IZ(MIN) 60 80 60 80 60 80 A 2 432.2004.04.1.0 Adjustable Low Voltage Shunt Regulator Test Circuits Test Circuit 1 Test Circuit 2 Test Circuit 3 AHK432 IN IZ IREF OUT IN IZ IREF OUT IN OUT IZ(off) 432.2004.04.1.0 3 Adjustable Low Voltage Shunt Regulator Typical Characteristics (Unless otherwise noted, TA = 25C, IZ = 10mA) Cathode Current vs. Cathode Voltage 15 AHK432 Cathode Current vs. Cathode Voltage 200 Cathode Current (A) -1 -0.5 0 0.5 1 1.5 Cathode Current (mA) 10 5 0 -5 -10 -15 150 100 50 0 -50 -100 -150 -200 -1 -0.5 0 0.5 1 1.5 Cathode Voltage ( V) Cathode Voltage (V) Reference Voltage vs. Temperature 1.252 180 Reference Current vs. Temperature Reference Voltage (V ) 1.248 1.244 1.24 1.236 1.232 -50 -25 0 25 50 75 100 125 Reference Curre nt (nA) IZ=10mA 160 140 120 100 80 60 40 20 0 -50 -25 0 25 50 75 IZ=10mA R1=10k R2=Open 100 125 Junction Temperature (C) Junction Temperatur e (C) Cathode Current vs. Temperature 80 Ratio of VREF / VZ vs. Temperature 0 -100 Cathode Current (nA) 70 60 50 40 30 20 10 0 -50 Ratio (V/V) VZ=5V VREF=0V (Off-state) IZ=10mA dVZ=VREF to 16V -200 -300 -400 -500 -600 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Junction Temperature (C) Junction Temperature (C) 4 432.2004.04.1.0 Adjustable Low Voltage Shunt Regulator AHK432 (Unless otherwise noted, TA = 25C, IZ = 10mA) Cathode Impedance vs. Temperature 16% 10 Impedance vs. Frequency Normalized Impedance 12% 8% 4% 0% -4 % -50 Impedance () 1 0.1 -25 0 25 50 75 100 125 0.01 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 Junction Temperature (C) Frequency ( Hz ) Gain and Phase vs. Frequency 120 100 180 150 120 90 60 30 0 -30 1.E+06 VOUT VIN 13.7k AHK432 8.25k 5V 169 Gain (dB) 80 60 40 20 0 -20 1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 Frequency (Hz) Test Circuit for Voltage Gain and Phase Stability Boundary 1k 100 80 Current (mA) Stable IZ Stable R1=10k CL 60 40 20 Unstable VREF=VZ AHK432 R2 0 10.E+0 100.E+0 1.E+3 10.E+3 100.E+3 1.E+6 10.E+6 Load Capacitance (pF) Test Circuit for Stability 432.2004.04.1.0 5 Adjustable Low Voltage Shunt Regulator Functional Block Diagram CATHODE AHK432 Symbol Diagram CATHODE REF REF VREF=1.24V ANODE ANODE Ordering Information Package SOT-23-3 SOT-23-5 TO-92 SOT-23-3 SOT-23-5 TO-92 Ammo Tape and Reel Bulk Bulk or Tape and Reel Tolerance 0.5% N/A N/A AHK432ILY-.5-B1 AHK432IGY-.5-T1 AHK432IGV-.5-T1 AHK432ILY-.5-A1 1.0% N/A N/A AHK432ILY-1-B1 AHK432IGY-1-T1 AHK432IGV-1-T1 AHK432ILY-1-A1 2.0% N/A N/A AHK432ILY-2-B1 N/A N/A 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. 6 432.2004.04.1.0 Adjustable Low Voltage Shunt Regulator Pin Configuration 3-lead SOT-23 (Top View) Reference Cathode 1 3 2 Anode 5-lead SOT-23 (Top View) N/C N/C Cathode 15 2 34 Anode Reference TO-92 (Top View) Reference 1 Anode 2 Cathode 3 AHK432 Package Information TO-92 (Bulk packing option) 12.7 BSC 3.705 0.525 4.74 0.47 1.27 0.15 0.38 0.80 0.10 4.825 0.505 0.38 5 All dimensions in millimeters. 5 x 2 432.2004.04.1.0 7 Adjustable Low Voltage Shunt Regulator TO-92 (Ammo packing option) 4.825 0.505 12.8 9.5 2.5 +0.4 -0.1 AHK432 4.74 0.47 0.38 x 3 5 x 2 3.705 0.525 5 x 4 SOT-23-3 2.92 0.12 1.30 0.10 0.95 BSC 1.90 BSC 2.37 0.27 0.86 0.16 0.075 0.075 0.96 0.21 0.38 0.40 0.10 x 3 0.50 0.10 0.54 REF All dimensions in millimeters. 8 0.14 0.06 4 4 432.2004.04.1.0 Adjustable Low Voltage Shunt Regulator SOT-23-5 2.85 0.15 1.90 BSC 0.95 BSC AHK432 1.575 0.125 1.10 0.20 0.60 REF 2.80 0.20 1.20 0.25 0.15 0.07 4 4 GAUGE PLANE 10 5 0.40 0.10 0.075 0.075 0.60 REF 0.45 0.15 0.10 BSC All dimensions in millimeters. 432.2004.04.1.0 9 Adjustable Low Voltage Shunt Regulator AHK432 AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech's standard warranty. Testing and other quality control techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed. Advanced Analogic Technologies, Inc. 830 E. Arques Avenue, Sunnyvale, CA 94085 Phone (408) 737-4600 Fax (408) 737-4611 10 432.2004.04.1.0 |
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