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Block Diagram
Functional Block Diagram
Symbol
Cathode
Anode
Reference
Absolute Maximum Ratings (Operating temperature range applies unless otherwise specified)
Characteristics
Cathode Voltage
Symbol
VKA
Value
18
Unit
V
Cathode Current Range (Continuous)
Reference Input Current Range
IK
IREF
20
10
mA
mA
SOT‐23
SOT‐89
TO‐92
‐‐
370
770
770
‐‐
Power Dissipation
PD
mW
Operating Temperature Range (Max.)
Storage Temperature Range
TOPR
TSTG
‐40 ‐ +125
‐65 ‐ +150
oC
oC
Operating Conditions
Characteristics
Cathode Voltage
Cathode Current Range (Continuous)
Operating Ambient Temperature Range
Symbol
VKA
IK
TOPR
Min.
VREF
0.1
Max.
16
20
Unit
V
mA
oC
‐40
125
Electrical Characteristics (TA=25°C, unless otherwise specified)
Characteristics
Symbol
Test Conditions
Min
Typ
1.24
1.24
1.24
1.25
1.25
1.25
Max
Unit
V
1.215
1.228
1.234
1.225
1.238
1.244
1.265
1.252
1.246
1.275
1.262
1.256
1.24V ±2.0%
1.24V ±1.0%
1.24V ±0.5%
1.25V ±2.0%
1.25V ±1.0%
1.25V ±0.5%
Reference Input Voltage (Fig1)
VREF
VK=VREF, IK=10mA
Ratio of Change in Reference Input Voltage to the
Change in Cathode Voltage (Fig2)
ΔVREF/ΔVK IK=10mA,, ΔVK=18V to VREF
‐
1.0
2.7
mV/V
Reference Input Current (Fig2)
Minimum Cathode Current for Regulation (Fig1)
IREF
IK(min)
IK=10mA, R1=10KΩ, R2=∞
VK=VREF
VK=6V, VREF=0
VK=16V, VREF=0
VK=VREF, f≤1kHz, IK=100uA to
20mA
‐
‐
‐
0.15
20
0.01
0.04
0.5
80
0.05
0.15
uA
uA
Off‐State Cathode Current (Fig3)
IK(off)
ZK
uA
Dynamic Output Impedance (Fig1)
‐
0.2
0.4
Ω
DS‐RS432‐07 September, 2009
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