Absolute Maximum Ratings
Input Voltage ...............................................................................................................................................................................6V
Operating Junction Temperature Range..........................................................................................................0¡C ² TJ ² 150¡C
Storage Temperature Range ...............................................................................................................................-65¡C to +150¡C
Lead Temperature Soldering: Wave Solder (through hole styles only).........................................10 sec. max, 260¡C peak
ESD Damage Threshold ...........................................................................................................................................................2kV
Electrical Characteristics: 0¡C²TA ² 70¡C, 0¡C²TJ ² 150¡C, VAdj = 0V unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Reference Voltage
VIN=2.75V to 5.5V, IOUT=10mA to 8A 1.234
1.253
1.271
V
(-1.5%)
(+1.5%)
Line Regulation
VIN=2.75V to 5.5V, IOUT=10mA
.02
.20
%
Load Regulation
Minimum Load Current
(Note 1)
VIN=2.75V,IOUT=10mA to 8A
VIN=5V, ÆVOUT= +1.5%
.04
5
.50
10
%
mA
Adjust Pin Current
Current Limit
VIN=2.75V,IOUT=10mA
VIN=2.75V,ÆVOUT= -1.5%
VIN=2.75V,VOUT=0V
70
120
µA
A
8.1
6.0
60
9.0
8.5
80
Short Circuit Current
A
Ripple Rejection
(Note 2)
VIN=3.25V Avg,
VRipple=1VP-P@120Hz,
dB
I
OUT=4A,CAdj=0.1µF; COUT = 22µF
Thermal Regulation (Note 2)
Dropout Voltage
30ms Pulse, TA=25¡C
0.002
%/W
IOUT=100mA
IOUT=1A
IOUT=2.75A
IOUT=4A
0.92
0.93
0.94
0.95
0.96
1.15
1.15
1.15
1.15
1.30
V
V
V
V
V
(Minimum VIN -VOUT
)
(Note 3)
IOUT=8A
RMS Output Noise
Freq=10Hz to 10kHz, TA=25¡C
0.003
0.5
%VOUT
%
Temperature Stability
Thermal Shutdown (Note 4)
150
180
25
210
¡C
Thermal Shutdown Hysteresis
(Note 4)
¡C
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: This parameter is guaranteed by design and is not 100% production tested.
Note 3: Dropout voltage is defined as the minimum input/output voltage differential required to maintain 1.5% regulation.
Note 4: 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
3L TO-220
1
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 70µA.
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.
2
3
VOUT
VIN
This pin is connected to the emitter of the power pass transistor and
provides a regulated voltage capable of sourcing 8A of current.
This is the supply voltage for the regulator . For the device to regu-
late, this voltage should be between 1.1V and 1.30V (depending on
the output current) greater than the output voltage.
2
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
