ML2280, ML2283
SHUNT REGULATOR
A unique feature of the ML2283 is the inclusion of a shunt
regulator connected from V+ terminal to ground which
It should be noted that before V+ voltage is high enough
to turn on the shunt regulator (which occurs at about
5.5V), 35kW resistance is observed between V+ and GND.
When the shunt regulator is not used, V+ pin should be
either left floating or tied to GND. The temperature
coefficient of the regulator is –22mV/°C.
also connects to the V terminal (which is the actual
CC
converter supply) through a silicon diode as shown in
Figure 8. When the regulator is turned on, the V+ voltage
is clamped at 11V set by the internal resistor ratio. The
BE
typical I-V of the shunt regulator is shown in Figure 9.
I+
V
12V
V+
CC
I + →
15mA
28.8kΩ
CURRENT LIMITING
RESISTOR, I+ ≤15mA
3.2kΩ
3.2kΩ
1
SLOPE =
GND
35kΩ
V+
5.5V 6.9V
Figure 9. Shunt Regulator
Figure 10. I-V Characteristic of the Shunt Regulator
13
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
