CHC1084-ADJPAGP [CHENMKO]
Regulator,;
| 型号： | CHC1084-ADJPAGP |
| 厂家： | 
CHENMKO ENTERPRISE CO. LTD. |
| 描述： | Regulator, |
| 文件： | 总6页 (文件大小：267K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
GENERAL DESCRIPTION
FEATURES
The CHC1084PA is a series of low dropout three-terminal
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1.5V maximum dropout at full load current
Fast transient response
regulators with a dropout of 1.5V at 1A output current.
The CHC1084PA series provides current limiting and
thermal shutdown. Its circuit includes a trimmed
bandgap reference to assure output voltage accuracy
to be within 2% for 1.5V, 1.8V, 2.5V, 3.3.V, 5.0V and
adjustable versions. Current limit is trimmed to ensure
specified output current and controlled short-circuit
current. On-chip thermal shutdown provides protection
against any combination of overload and ambient
temperature that would create excessive junction
temperature.
The CHC1084PA has an adjustable version that can
provide the output voltage from 1.25V to 12V with only
two external resistors.
The CHC1084PA series is available in the industry
standard TO252-3L package.
Output current limiting
Built-in thermal shutdown
Good noise rejection
3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V,
3.3V, 5.0V
APPLICATIONS
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PC Motherboard
LCD Monitor
Graphic Card
DVD-video player
NIC/Switch
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
PIN CONFIGURATION
TO 2 5 2-3L
3
2
1
VIN
VOUT
ADJ/GND
Metal Tab VOUT
BLOCK DIAGRAM
3
INPUT
-
+
Thermal
Protection
2
1
OUTPUT
For Adjustable Output, disconnect A1 and A2, connect B
For Fixed Output,connect A1 and A2, disconnect B
A1
A2
ADJ/GND
B
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Symbol
VIN
Parameter
Input Voltage
Rating
12
Unit
V
TJ
Maximum Junction Temperature
150
℃
TS
TLEAD
ESD
Storage Temperature
Lead Temperature (10 sec.)
ESD (Machine Model)
-65~150
300
℃
℃
V
600
Note 1: Stresses greater than those listed under“Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress rating only, and functional operation of the device at these or any other conditions beyond
those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum
Ratings” for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Symbol
VIN
Parameter
Input Voltage
Rating
12
Unit
V
TJ
Operating Junction Temperature Range
-20~150
℃
ELECTRICAL CHARACTERISTICS
Operating Conditions: VIN≤10V, TJ=25℃, unless otherwise specified
Parameter
Reference
Voltage
Symbol
Test Condition
IO=10mA, VIN-VOUT=1.5V
IO=10mA,1.5V≤VIN-VOUT≤8V
IO=10mA, VIN=3V
Min.
Typ.
Max. Unit
1.225 1.250 1.275
1.225 1.250 1.275
VREF
CHC1084PA -Adj
CHC1084PA -1.5
CHC1084PA -1.8
CHC1084PA -2.5
CHC1084PA -3.3
CHC1084PA -5.0
CHC1084PA-XXX
V
V
1.485
1.470
1.782
1.764
2.475
2.450
3.267
3.235
4.950
4.900
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
5.0
5.0
0.2
0.2
1
12
15
20
26
40
1.3
1.515
1.530
1.818
1.836
2.525
2.550
3.333
3.365
5.050
5.100
0.5
IO=10mA, 3V≤VIN≤10V
IO=10mA, VIN=3.3V
IO=10mA, 3.3V≤VIN≤10V
IO=10mA, VIN=4V
IO=10mA, 4V≤VIN≤10V
IO=10mA, VIN=4.8V
IO=10mA, 4.8V≤VIN≤10V
IO=10mA, VIN=6.5V
V
V
V
V
Output Voltage
VOUT
V
V
IO=10mA, 6.5V≤VIN≤12V
IO=10mA,1.5V≤VIN-VOUT≤7V
IO=10mA,1.5V≤VIN-VOUT≤10V
VIN= 3V, 10mA<Io<5A
VIN= 3V, 10mA<Io<5A
VIN= 3.3V, 10mA<Io<5A
VIN= 4V, 10mA<Io<5A
VIN= 5V, 10mA<Io<5A
VIN= 6.5V, 10mA<Io<5A
IOUT = 5A ,∆VOUT=1%VOUT
VIN-VOUT=3V
%
%
Line Regulation
Load Regulation
RegLINE
RegLoad
0.5
CHC1084PA -Adj
CHC1084PA -1.5
CHC1084PA -1.8
CHC1084PA -2.5
CHC1084PA -3.3
CHC1084PA -5.0
CHC1084PA-XXX
CHC1084PA-XXX
%
15
18
25
33
50
1.5
mV
mV
mV
mV
mV
V
Dropout Voltage
Current Limit
VIN- OUT
ILIMT
5.1
A
F=120Hz,COUT=25uF
Tantalum, VIN-VOUT=3V
Ripple Rejection
CHC1084PA-XXX
CHC1084PA-XXX
60
0.5
70
dB
%
Temperature
Stability
IO=10mA
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
ELECTRICAL CHARACTERISTICS (CONTINUED)
Operating Conditions: VIN≤10V, TJ=25℃, unless otherwise specified
Parameter
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current(ADJ)
Quiescent Current
Symbol
Test Condition
IO=10mA~5A, 1.5V≤VIN-VOUT≤10V
IO=10mA~5A, 1.5V≤VIN-VOUT≤10V
Min.
Typ.
60
0.2
5
5
0.3
Max. Unit
120
5
µA
µA
mA
mA
%
CHC1084PA
1.5V≤VIN-VOUT≤10V
10
10
Iq
VIN=VOUT+1.25V
TA=125℃, 1000hrs
Long-term Stability
RMS Output Noise
TA=25℃, 10Hz≤f≤10kHz
0.003
%
(% of VOUT
)
Power Dissipation
Pd
θJA
θJC
W
1.6
Thermal Resistance,
Junction to Ambient
℃/
W
45
℃/
W
Thermal Resistance,
Junction to case
2.7
Thermal Shutdown
Thermal Shutdown
Hysteresis
Junction Temperature
150
25
℃
℃
TYPICAL APPLICATIONS
CHC1084PA-ADJ
Vin Vout
Vin
Vout
ADJ
+
+
R1
R2
100uF
100uF
Vout=Vref*(1+R2/R1)+Iadj*R2
The CHC1084PA keeps a constant 1.25V between the output pin and the adjust pin. By placing a resistor R1 across
these two pins a constant current flows through R1, adding to the Iadj current and into the R2 resistor producing a
voltage equal to the (1.25/R1)*R2+Iadj*R2 which will be added to the 1.25V to set the output voltage. This is
summarized in the above equation. Since the minimum load current requirement of the CHC1084PA is 10mA, R1 is
typically selected to be 121Ω resistor so that it automatically satisfies the minimum current requirement. Notice that
since Iadj is typically in the range of 50uA it only adds a small error to the output voltage and should only be
considered when a very precise output voltage setting is required. For example, in a typical 3.3V application where
R1=121Ω and R2=200Ω the error due to Iadj is only 0.3% of the nominal set point.
CHC1084PA-5.0
Vin=6.5V
100uF
5V at 5A
Vin
Vout
GND
+
+
100uF
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
TYPICAL APPLICATIONS (CONTINUED)
Stability
The CHC1084PA requires the use of an output capacitor as part of the frequency compensation in order to make the
regulator stable. For most applications a minimum of 100uF aluminum electrolytic capacitor insures both stability
and good transient response.
Thermal Design
The CHC1084PA incorporates an internal thermal shutdown that protects the device when the junction temperature
exceeds the maximum allowable junction temperature. Although this device can operate with junction temperatures
in the range of 150℃, it is recommended that the selected heat sink be chosen such that during maximum
continuous load operation the junction temperature is kept below the temperature.
Pd=Vout*Iout
Tj=TA+Pd*θJA<150℃
Layout Consideration
The output capacitors must be located as close to the Vout terminal of the device as possible. It is recommended to
use a section of a layer of the PC board as a plane to connect the Vout pin to the output capacitors to prevent any
high frequency oscillation that may result due to excessive trace inductance.
TYPICAL PERFORMANCE CHARACTERISTICS
Dropout Voltage vs Output Current
Output Voltage vs Temperature
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
2.53
2.52
2.51
2.50
2.49
2.48
2.47
0.85
0.80
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Output Current (A)
0
25
50
TJ (℃)
75
100
125
Line Regulation vs Temperature
Adjust Pin Current vs Output Current
0.0
80
75
70
65
60
55
50
45
40
35
30
25
-0.2
-0.4
-0.6
-0.8
-0.1
20
0
0
25
50
75
TJ (℃)
100
125
1
2
3
4
5
Output Current (A)
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)
Short Circuit Current vs Dropout Voltage
Dropout Voltage vs Temperature
8
7
1.40
1.35
1.30
1.25
1.20
6
5
4
3
2
1
0
0
2
4
6
8
10
12
0
25
50
75
TJ (℃)
100
125
Dropout Voltage (V)
Load Transient Response
Line Transient Response
Vin=5.5V, Vout=2.5V Io=100mA to 5A Cin=Cout=100µF(tan)
Vin=4.5V to 6.5V Vout=2.5V Io=200mA Cin=Cout=100µF(tan)
CHENMKO ENTERPRISE CO.,LTD
CHC1084PAGP SERIES
Low Dropout Linear Regulator
TO252-3L
5.6
E
b2
2.25
1.2
b
e
Land Pattern Recommendation (Unit : mm)
e1
H
C1
L
SEATING PLANE
Notes:
SEE NOTE2
1. JEDEC Outline:TO-252 AB
2. Mils suggested for positive contact at mounting
Dimensions In Millimeters
Symbol
Dimensions In Inches
Min.
2.18
1.08
0.64
5.23
Nom.
2.29
1.15
Max.
2.38
1.32
0.78
5.43
Min.
0.086
0.043
0.025
0.206
Nom.
0.090
0.045
Max.
0.094
0.052
0.031
0.214
A
A1
b
b2
C
C1
D
E
e
e1
H
L
L1
L2
5.35
0.51TYP.
0.52
0.211
0.020TYP.
0.020
0.46
5.33
6.38
2.24
4.48
9.00
0.51
0.65
1.52
0.58
5.80
6.68
2.34
4.68
10.40
0.018
0.210
0.251
0.088
0.176
0.354
0.020
0.026
0.060
0.023
0.228
0.263
0.092
0.184
0.409
5.57
6.58
0.219
0.259
9.70
0.382
0.83
1.78
0.95
2.03
0.033
0.070
0.037
0.080
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