PJ1085
3 Amp Low Dropout Positive Voltage Regulator
T
He PJ1085 Series of high performance positive voltage
Regulators are designed for
use in applications
TO-220
TO-263
TO-252
requiring
low dropout performance at full rated current, Additionally,
the PJ1085 Series provides excellent regulation over
variations due to changes in line, load and temperature.
Outstanding features include low dropout performance at
rated current, fast transient response, internal
limiting
and
current
thermal shutdown protection of the output
Pin: 1..Adj (Com)
2. Out
3. In
device. The PJ1085 Series are three terminal regulators with
fixed and adjustable voltage options available in popular
packages.
ORDERING INFORMATION
Device
PJ1085CZ
PJ1085CZ-2.5
PJ1085CZ-3.3
PJ1085CM
PJ1085CM-2.5
PJ1085CM-3.3
Operating Temperature
(Ambient)
TO-220
Package
FEATURES
Low dropout voltage 1.3V max.
Full current rating over line and temperature
•
•
Fast transient response
Total output regulation
±2%
over line, load and
temperature
•
•
•
•
•
Adjust pin current max 120μA over temperature
Line regulation typical 0.015%.
Load regulation typical 0.05%.
Fixed/adjustable output voltage
TO-220 & TO-263 & To-252 package
-20℃ to +85℃
TO-263
PJ1085CP
PJ1085CP-2.5
TO-252
PJ1085CP-3.3
NOTE: Contact factory for additional voltage option.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATING
Parameter
Input Voltage
Power Dissipation
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
1-7
Symbol
V
IN
P
D
θ
JC
θ
JA
T
J
T
A
T
STG
T
LEAD
Maximum
7
Internally Limited
2.5
50
0 to +125
-20 to +85
℃
-25 to 150
260
2002.rev.A
Units
V
W
℃/W
PJ1085
3 Amp Low Dropout Positive Voltage Regulator
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adjust V
IN
= 2.75V to 12V and Adjust Io = 10mA to 3.0A
Fixed V
IN
= 4.75V to 12V and Fixed Io = 10mA to 3.0A
Test Conditions
Parameter
Output Voltage
(1)
Fixed Voltage
Reference Voltage
(1)
Adj Voltage
Line Regulation
(1)
(Vin-Vout=3V)
Load Regulation
(1)
(Vin-Vout=3V)
Dropout Voltage
ΔV
REF
=1%
Current Limit
(Vin-Vout=5V)
Quiescent Current
Fixed Model
Temperature Coefficient
Adjust Pin Current
I
Q
Tc
I
ADJ
25
5V
Ic
L
Over Temp.
12
0.005
55
120
Adjust Pin Current Change
Temperature Stability
Minimum Load Current
Adjust Model
RMS Output Noise
(2)
Ripple Rejection Ratio
(3)
ΔI
ADJ
Ts
Io
V
N
R
A
5V
3.0A
5V
5V
25
Over Temp.
60
500mA Over Temp.
0.2
0.5
5
0.003
72
10
5
%
mA
%Vo
dB
μA
14
mA
%/℃
3.2
V
D
REG
(LOAD)
REG
(LINE)
10mA
V
REF
5V
10mA
Symbol
Vo
V
IN
-V
OUT
5V
I
O
10mA
T
J(4)
25
Over Temp.
25
Over Temp.
25
Over Temp.
25
Over Temp.
25
Min
0.99|Vo|
0.98|Vo|
1.238
1.225
0.015
0.035
0.05
0.2
1
1.1
4.0
1.3
A
0.3
0.4
V
%
1.250
Test Limits
Typ
Vo
Max
1.01|Vo|
1.02|Vo|
1.262
1.275
0.2
V
Units
(1)Low duty cycle pulse testing with Kelvin connections required.
(2)Bandwidth of 10Hz to 10KHz.
(3)120Hz input ripple (C
ADJ
for ADJ) =25μF .
(4)Over Temp.-over specified operating junction temperature range.
2-7
2002.rev.A
PJ1085
3 Amp Low Dropout Positive Voltage Regulator
Typical Application Circuit
(1) C1 NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
(2) C2 REQUIRED FOR STABILITY
(1) C1 NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS
(2) C2 REQUIRED FOR STABILITY
3-7
2002.rev.A
TI Technology Forum
京公网安备 11010802033920号
EEWORLD
