0¡C ² TA ² 70¡C, 0¡C ² TJ ² 150¡C, VSENSE = V
0V unless otherwise specified.
=
Electrical Characteristics:
OUT and VAdj
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VPOWER Supply Only
Output Current
VPOWER = 6V, VCONTROL not connected,
VADJUST = VOUT = VSENSE = 0V
0.1
1
mA
Note 1: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set
the output voltage is selected to meet the minimum load current requirement.
Note 2: The VCONTROL pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:100
ratio. The minimum value is equal to the quiescent current of the device.
Note 3: This parameter is guaranteed by design and is not 100% production tested.
Note 4: Dropout is defined as either the minimum control voltage, (VCONTROL) or minimum power voltage (VPOWER) to output voltage differential
required to maintain 1.5% regulation at a particular load current.
Note 5: This parameter is guaranteed by design, but not parametrically tested in production. However, a 100% thermal shutdown functional test is
performed on each part.
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
5L TO-220
1
VSENSE
This Kelvin sense pin allows for remote sensing of the output voltage at the
load for improved regulation. It is internally connected to the positive input
of the voltage sensing error amplifier.
2
Adjust
This pin is connected to the low side of the internally trimmed 1.5% bandgap
reference voltage and carries a bias current of about 50µA. A resistor divider
from Adj to VOUT and from Adj to ground sets the output voltage. Also,
transient response can be improved by adding a small bypass capacitor from
this pin to ground.
3
4
VOUT
This pin is connected to the emitter of the power pass transistor and pro-
vides a regulated voltage capable of sourcing 7A of current.
VCONTROL
This is the supply voltage for the regulator control circuitry. For the device
to regulate, this voltage should be between 1V and 1.25V (depending on the
output current) greater than the output voltage. The control pin current will
be about 1% of the output current.
5
VPOWER
This is the power input voltage. The pin is physically connected to the collec-
tor of the power pass transistor. For the device to regulate, this voltage
should be between 0.1V and 0.65V greater than the output voltage, depend-
ing on output current. The output load current of 7A is supplied through
this pin.
Block Diagram
VPOWER
VCONTROL
BIAS
and
TSD
VREF
-
+
+
EA
IA
-
VOUT
VSENSE
Adjust
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
