AHK432

AHK432 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 three-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 batterypowered portable electronic applications. It also has a sharp turn-on characteristic and a dynamic resistance of only 50mΩ, making it an excellent replacement for zener diodes in low tempco designs. The AHK432 is available in the Pb-free, surfacemount 3- or 5-pin SOT23, as well as the through hole TO-92. Three voltage tolerance options are offered in each package: ±0.5%, ±1%, and ±2%. Features • • • • • • PowerManager™ Wide Output Voltage Range (1.24V to 20V) Operating Current From 60µA to 100mA Low Dynamic Output Resistance of 50mΩ ±0.5% Trimmed Voltage Reference 10mV (Typical) VREF Deviation, From -40°C to +105°C Surface Mount 3- or 5-Pin SOT23 or ThroughHole 3-Pin TO-92 Package Applications • • • • • • • Adjustable and Programmable Supplies Global Voltage Reference for Multiple Power Supplies Instrumentation Isolated Feedback in Switching Power Supplies Linear Regulators (External Reference) Medical Electronics (see Endnote, page 10) Notebook Computers Typical Application IN RL OUT R1 Adjustable regulator: AHK432 R2 OUT = VREF R1 + R2 R2 432.2005.11.1.3 1 AHK432 Adjustable Low Voltage Shunt Regulator Pin Descriptions Pin SOT23-3 SOT23-5 TO-92 Description Reference. Cathode. Anode. Not internally connected. 1 2 3 N/A 4 3 5 1, 2 1 3 2 N/A Pin Configuration SOT23-3 (Top View) Reference Cathode 1 3 2 Anode SOT23-5 (Top View) N/C N/C Cathode 15 2 34 Anode Reference TO-92 (Top View) Reference 1 Anode 2 Cathode 3 2 432.2005.11.1.3 AHK432 Adjustable Low Voltage Shunt Regulator Absolute Maximum Ratings1 TA = 25°C, unless otherwise noted. Symbol VZ IZ IREF TJ TLEAD Description Cathode Voltage Continuous Cathode Current Reference Current Operating Junction Temperature Range Maximum Soldering Temperature (at Leads) Value 20 100 3 -40 to 150 260 Units V mA mA °C °C Thermal Characteristics Symbol ΘJA PD Description Maximum Thermal Resistance Maximum Power Dissipation Package TO-92 SOT23-3, SOT23-5 TO-92 SOT23-3, SOT23-5 Value 160 410 780 300 Units °C/W mW 1. 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. 432.2005.11.1.3 3 AHK432 Adjustable Low Voltage Shunt Regulator Electrical Characteristics TA = 25°C, unless otherwise noted. AHK432 0.5% AHK432 1.0% AHK432 2.0% Symbol VREF Description Conditions Reference Voltage Min Typ Max Min Typ Max Min Typ Max Units VDEV ∆VREF/ ∆VZ IREF IREF(DEV) IZ(OFF) RZ IZ(MIN) VZ = VREF TA = 25°C 1.234 1.240 1.246 1.228 1.240 1.252 1.215 1.240 1.265 IZ = 10mA V 1.258 1.215 1.265 1.200 1.280 (test circuit 1) TA = -40 1.222 to +105°C TA = -40°C to +105°C, 10 25 10 25 10 25 mV VREF Temp VZ = VREF, IZ = 10mA Deviation (test circuit 1) Ratio of Change IZ = 10mA, -1.0 -2.7 -1.0 -2.7 -1.0 -2.7 mV/V in VREF to ∆VZ = 16V to VREF Change in (test circuit 2) Cathode Voltage Reference R1 = 10kΩ, R2 = ∞, 0.15 0.5 0.15 0.5 0.15 0.5 µA Input Current IZ = 10mA (test circuit 2) IREF Temp TA = -40°C to +105°C 0.1 0.4 0.1 0.4 0.1 0.4 µA Deviation R1 = 10kΩ, R2 = ∞, IZ = 10mA (test circuit 2) Off State VREF = 0V VZ = 6V 0.04 0.1 0.04 0.1 0.04 0.1 µA Cathode Current (test circuit 3) VZ = 16V 0.04 0.5 0.04 0.5 0.04 0.5 Dynamic f