CM1085
3.0 AMP P
OSITIVE
V
OLTAGE
R
EGULATOR
GENERAL DESCRIPTION
The CM1085 series of high performance positive voltage
dropout performance at full rated current. Additionally, the
in line, load and temperature.
Outstanding features include low dropout performance at
rated current, fast transient response, internal current
limiting and thermal shutdown protection of the output
device. The CM1085 series are three terminal regulators
with adjustable voltage options available in popular
packages.
FEATURES
!
!
!
!
!
!
!
!
Low dropout performance
1.3V max. for CM1085
Full current rating over line and temperature
Fast transient response
±2% total output regulation over line, load and temperature
Adjust pin current max 90µA over temperature
Adjustable output voltage
Line regulation typically 0.015%
Load regulation typically 0.1%
TO-252 package
regulators are designed for use in applications requiring low
!
CM1085 series provides excellent regulation over variations
!
APPLICATIONS
!
!
!
Power Supplies
Computer Add-On Cards
Other Applications Requiring Low Dropout Voltage Over
Rated Current
PIN CONFIGURATION
TO-252
Top View
GND/ADJ
VO UT
2
1
2003/05/14
Preliminary
Rev. 0.2
Champion Microelectronic Corporation
VIN
3
Page 1
CM1085
3.0 AMP P
OSITIVE
V
OLTAGE
R
EGULATOR
BLOCK DIAGRAM
INPUT
CURRENT
LIMITING
AMPLIFIER
S.O.A
Limit
SENSE
OUTPUT
THERMAL OVERLOAD
VOLTAGE
REGULATION
AMPLIFIER
VREF
ADJ/COM
ORDERING INFORMATION
Package Type
TO-252
CM1085KCN252
CM1085SCN252
CM1085CN252
Operating Temperature Range (T
A
)
0℃ ~ +70℃
0℃ ~ +70℃
0℃ ~ +70℃
Output Voltage
2.5V
3.3V
ADJ.
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Power Dissipation
Thermal Resistance Junction to Case
TO-263
Thermal Resistance Junction to Ambient
TO-252
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature（Soldering）10 Sec
θ
JA
T
J
T
STG
T
LEAD
80
0 to 125
-65 to 150
260
℃/W
℃
℃
℃
θ
JC
2.5
℃/W
Symbol
V
IN
P
D
Maximum
7
Internally
Limited.
Units
V
W
2003/05/14
Preliminary
Rev. 0.2
Champion Microelectronic Corporation
Page 2
CM1085
3.0 AMP P
OSITIVE
V
OLTAGE
R
EGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj V
IN
= 3.8V to 7.0V and Adj I
0
=10mA to 3.0A, Fixed mode V
IN
= 4.75V to 7.0V and Adj I
0
=10mA
to 3.0A
Test Conditions
Parameter
Output Voltage
Fixed Voltage
Reference Voltage
Line Regulation
（
1
）
（
1
）
Test Limits
T
j
25℃
Min
0.99l V
0
I
0.98l V
0
I
1.238
1.225
Typ
V
0
V
0
1.250
1.250
0.015
0.1
1
1.1
5.0
7.5
12
0.005
25℃
55
0.2
120
5
14
1.3
A
mA
%/℃
μA
μA
%
14
mA
%V
O
dB
Max
1.01IV
0
I
1.02IV
0
I
1.262
1.275
0.2
0.3
%
%
V
V
Units
V
Symbol
V
O
V
REF
REG
（
LINE
）
REG
（
LOAD
）
V
D
I
CL
I
O
T
C
I
ADJ
ΔI
ADJ
T
S
I
O
V
N
（
4
）
V
IN
5V
5V
l
0
0mA
3A
10mA
3A
10mA
125℃
25℃
125℃
25℃
25℃
25℃
125℃
125℃
Adj Voltage Version
（
1
）
（
1
）
Load Regulation
Dropout Voltage
CM1085
Current Limit
5V
（
2
）
Quiescent Current (fixed
voltage)
Temperature Coefficient
Adjust Pin Current
Adjust Pin Current
Change
Temperature Stability
Minimum Load Current
Adj Voltage Version
RMS Output Noise
（
3
）
5V
5V
5V
0.5A
0.5
5
25℃
0.003
60
72
Ripple Rejection Ratio
NOTES：
：
R
A
5V
5.0A
125℃
（1）
Low duty cycle pulse testing with Kelvin connections required.
（2） ΔV
OUT
,
ΔV
REF
=1%
（3）
Bandwidth of 10 Hz to 10 kHz.
（4）
120 Hz input ripple（C
ADJ
for ADJ=25μF）
2003/05/14
Preliminary
Rev. 0.2
Champion Microelectronic Corporation
Page 3
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