SSC SS6084

SS6084
5A Low-dropout Positive Linear Regulator
FEATURES
DESCRIPTION
Dropout voltage 1.3V at 5A o utput current.
The SS6084 is a low -dropout three -terminal linear
Fast transient response.
regulator with 5A output current capability. The
Extremely tight line and load regulation.
output voltage is adjustable with a resistor divider or
Current limiting and thermal protection.
fixed at 1.5V, 1.8V, 2.5V or 3.3V . Dropout voltage is
Adjustable o utput voltage or fixed at 1.5V,
guaranteed to be a maximum of 1.4V at the
1.8V, 2.5V, 3.3V.
maximum output current. This low dropout voltage
Standard 3-pin power packages.
and fast transient response make the SS6084 ideal
for low - voltage microprocessor applications. Current
and thermal limiting provide protection against
APPLICATIONS
Motherboard I/O Power Supplies.
overload conditions that would create excessive
Microprocessor Power Supplies.
junction temperatures.
High -Current Regulators.
Post-regulator for Switching Supplies .
TYPICAL APPLICATION CIRCUIT
3
VIN
5V
SS6084
1 ADJ
C1 +
10µF
2
VOUT
3.3V
RF1
125Ω
+
1%
C2
RF2
10µF
205Ω
1%
V REF
VREF=VOUT -VADJ=1.25V (typ. )
VOUT=V REF x (1+RF2/RF1)+ IADJ x RF2
IADJ=55 µA (typ.)
(1) C1 is needed if the device is
physically far from the filter
capacitors.
(2) C2 is required for stability.
Adjustable Voltage Regulator
3
VIN
5V
SS6084-33
2
VOUT
3.3V
1
C1 +
10µF
+
C2
10µF
GND
Fixed Voltage Regulator
Rev.2.02 4/06/2004
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SS6084
ORDERING INFORMATION
PIN CONFIGURATION
SS608 4- XXCXXX
TO-252
TOP VIEW
Packing type
TB: tubes
TR: tape and reel
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
Package type
E: TO- 252
M: TO-263
T: TO -220
1
2
3
1
2
3
1
2
TO-263
TOP VIEW
Output voltage
Default : adjustable
15: 1.5V
18: 1.8V
25: 2.5V
33: 3.3V
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
TO-220
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
Example: SS6084 -15CETR
3
à 1.5V fixed output in TO -252
shipped in tape and reel
ABSOLUTE MAXIMUM RATINGS
VIN pin to ADJ/GND pin
7V
Operating Junction Temperature Range
0°C~ 125°C
Storage Temperature Range
- 65°C ~ 150°C
Thermal Resistance Junction to Case
TO-252
TO-263, TO -220
Thermal Resistance Junction to Ambient
12.5°C/W
3°C /W
TO-252
100°C/W
(Assume no ambient airflow, no heatsink) TO-263
60°C /W
TO-220
50°C /W
Lead Temperature (Soldering) 10 sec.
Rev.2.02 4/06/2004
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260°C
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SS6084
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
ELECTRICAL CHARACTERISTICS
(V IN=5V, TJ=25° C, IO=10mA, unless otherwise specified)
PARAMETER
Reference Voltage
Output Voltage
TEST CONDITIONS
MIN.
TYP.
MAX.
UNIT
1.238
1.25
1.262
V
SS6084 -15, VIN=5V
1.48
1.50
1.52
SS6084 -18, VIN=5V
1.78
1.80
1.82
SS6084 -25, VIN=5V
SS6084 -33, VIN=5V
2.47
2.50
2.53
3.26
3.30
3.34
0.015
0.2
%
0.6
%
1.4
V
SS6084 (ADJ)
TJ=25° C
V
ADJ : 2.65V ≤ VIN ≤7V
Line Regulation
VOUT=1.25V
Fix : VOUT+1.4V ≤ VIN ≤ 7V
TJ=25° C
Load Regulation
10mA < IO < 5A
TJ=25° C
∆VOUT, ∆VREF=1%
Dropout Voltage
10mA ≤ IO ≤ 5A
1.3
0°C ≤ TJ ≤ 125 °C
Current Limit
0°C ≤ TJ ≤125° C
Adjusted Pin Current
Adjusted Pin Current Change
2.65V ≤ VIN ≤ 7V
2. 65V ≤ VIN ≤ 7V
(∆IADJ)
0°C ≤ TJ≤ 125 °C
Temperature Stability
5
IO=0.5A
6
A
55
120
µA
0.2
5
µA
0°C ≤ TJ≤ 125 °C
0.5
Minimum Load Current
0°C ≤ TJ ≤125° C
5
RMS Output Noise (% of VOUT)
10Hz ≤ f ≤ 10KHz
%
10
mA
0.003
%
72
dB
120Hz input ripple
Ripple Rejection Ratio
COUT=25µF
60
(V IN -VOUT )=3V
Rev.2.02 4/06/2004
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SS6084
BLOCK DIAGRAM
VIN
+
GM
V REF +
1.25V
Current Amp.
-
Thermal
Limit
Current
Limit
55µA
VOUT
For fixed voltage
device
GND
ADJ
PIN DESCRIPTIONS
ADJ PIN
-
Providing VREF=1.25V (typ.) for adjustable VOUT. VREF =VOUT-VADJ and IADJ=55µA (typ.)
GND PIN- Power ground.
VOUT PIN -
Adjustable output voltage.
VIN PIN
Power Input.
-
TYPICAL PERFORMANCE CHARACTERISTICS
Output Voltage
(mV, AC)
Output Voltage
(V, AC)
0.4
0.2
50
0
-50
-0.2
VIN =5.0V
CIN=1µF(Tantalum)
COUT =10µF(Tantalum)
VOUT=3.3V
-100
Input Voltage (V)
Load Current
-0.4
2.5A
0.1A
0
20
Fig. 1
Rev.2.02 4/06/2004
0
40
60
80
100
CIN=1µF (Tantalum)
COUT =10µF (Tantalum)
VOUT=3.3V
7.0
6.0
0
Time (µS)
Load Transient Response
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40
Fig. 2
80
120
160
200
Time (µS)
Line Transient Response
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SS6084
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Minimum Operating Current (mA)
Minimum differential Voltage (V)
1.35
1.30
1.25
1.20
1.15
1.10
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
1.05
0
1
2
Fig. 3
3
4
0
5
2
3
4
5
Differential Voltage (V)
Fig. 4 Minimum Operating Current
5
8
7
Short Circuit Current (A)
Minimum Operating Current (mA)
1
Output Current (A)
Dropout Voltage (V OUT=3.3V)
4
3
2
1
6
5
4
3
2
1
0
1
2
3
4
5
6
7
8
0
9
1
2
Differential Voltage (V)
Fig. 5
3
4
5
6
7
VIN-VOUT (V)
Minimum Operating Current
Fig. 6 SS6084 (A DJ.) Short Circuit Current
Ripple Rejection Ratio (dB)
-20
C OUT=3.3µF
-30
-40
COUT=10µF
-50
-60
-70
COUT=25µF
-80
1
10
2
10
3
10
4
10
5
10
6
10
7
10
Frequency (Hz)
Fig. 7
Rev.2.02 4/06/2004
SS6084 (ADJ.) Ripple Rejection
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SS6084
PHYSICAL DIMENSIONS
l
TO-220 (unit: mm)
A
E
Φ3.81±0.27
F
D
SYMBOL
MIN
MAX
A
3.56
4.82
D
14.23
16.51
E
9.66
10.66
e
2.29
2.79
e1
0.50
1.15
e2
-
1.10
F
0.51
1.39
J1
2.04
2.92
L
12.70
14.73
SYMBOL
MIN
MAX
A
2.19
2.38
A1
1.02
1.27
b
0.64
0.88
b2
5.21
5.46
C1
0.46
0.58
D
5.33
5.59
E
6.35
6.73
L
e1
J1
e
l
e2
TO-252 (unit: mm)
E
C1
b2
A
D
H
L
b
Rev.2.02 4/06/2004
e
e
2.28 (TYP.)
H
9.40
10.42
L
0.51
-
A1
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SS6084
PHYSICAL DIMENSIONS (cont.)
l
TO-263 (unit: mm)
E
SYMBOL
MIN
MAX
A
4.06
4.83
b
0.50
1.00
b2
1.14
1.40
C
-
0.7
c2
1.14
1.40
D
8.63
9.66
E
9.65
10.29
A
C2
L2
L
D
L1
e
e
b2
C
b
2.54 (TYP.)
L
14.60
15.88
L1
2.28
2.80
L2
-
1.40
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responsibility for its use, or for infringement of any patent or other intellectual property rights of third parties that may result from its
use. Silicon Standard reserves the right to make changes as it deems necessary to any products described herein for any reason, including
without limitation enhancement in reliability, functionality or design. No license is granted, whether expressly or by implication, in relation to
the use of any products described herein or to the use of any information provided herein, under any patent or other intellectual property rights of
Silicon Standard Corporation or any third parties.
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