Datasheet ZTLV431 (Diodes) - 3

ZTLV431 Electrical characteristics (electrical characteristics over recommended operating conditions, TA = 25°C, KKA = VREF, IKA = 10mA unless otherwise stated) Symbol Parameter Conditions Min. Typ. Max. Units
ZTLV431A 1.228 1.24 1.252 V T REF Reference voltage A = -40 to 85°C ZTLV431A 1.215 1.265 V TA = -40 to 125°C ZTLV431A 1.209 1.271 T Deviation of reference A = 0 to 70°C 4 12 VREF(dev) voltage over full TA = -40 to 85°C 6 20 mV temperature range TA = -40 to 125°C 11 31 Ratio of change in 6V -1.5 -2.7 ΔVREF reference voltage to VKA from VREF to 10V -1.5 -2.7 --------- mV/V ΔV the change in cathode I KA KA = 10mA voltage IREF Reference input current IKA = 10mA, R1 = 10k⍀., R2 = OC 0.1 0.5 µA I T KA = 10mA, A = 0 to 70°C 0.05 0.3 I I REF deviation over full REF(dev) R1 = 10k⍀, TA = -40 to 85°C 0.1 0.4 µA temperature range R2 = OC TA = -40 to 125°C 0.15 0.5 IKMIN Minimum cathode VKA = VREF TA = -40 to 125°C 55 100 µA current for regulation IK(OFF) Off-state current VKA = 10V, VREF =0V 10 30 µA zKA Dynamic output VKA = VREF, f = <1kHz, 0.25 0.4 ⍀ impedance IK = 0.1 to 15mA Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference input voltage over the full temperature range. The average temperature coefficient of the reference input voltage, VREF is defined as: ⎛ppm⎞ V x 1000000 V ------- DEV = --------------------- REF Vmax ⎝ °C ⎠ V (T – T ) REF 1 2 The dynamic output impedance, ZKA, is defined as: ΔVK Vmin ZKA = Δ-----IK Vdev = Vmax - Vmin When the device is programmed with two externalresistors, R1 and R2, (fig 2) , the dynamic output impedance of the overall circuit, Z’, is defined as: T1 T2
Temperature
Z′ = Z x R ( ) KA + R
Issue 7 - April 2008 3 www.zetex.com
© Zetex Semiconductors plc 2008 Document Outline ZTLV431 1.24V Cost effective shunt regulator Description Features Applications Pin connections Ordering information Absolute maximum ratings Package thermal data Recommended operating conditions Electrical characteristics (electrical characteristics over recommended operating conditions, TA = 25°C, KKA = VREF, IKA = 10mA unless otherwise stated) Typical characteristics Pin connections - preview status devices Package outline - SOT23