SS6084
5A Low-dropout Positive Linear Regulator
FEATURES
Dropout voltage 1.3V at 5A o utput current.
Fast transient response.
Extremely tight line and load regulation.
Current limiting and thermal protection.
Adjustable o utput voltage or fixed at 1.5V,
1.8V, 2.5V, 3.3V.
Standard 3-pin power packa
ges.
DESCRIPTION
The SS6084 is a low -dropout three -terminal linear
regulator with 5A output current capability. The
output voltage is adjustable with a resistor divider or
fixed at 1.5V, 1.8V, 2.5V or 3.3V . Dropout voltage is
guaranteed to be a maximum of 1.4V at the
maximum output current. This low dropout voltage
and fast transient response make the SS6084 ideal
for low - voltage microprocessor applications. Current
and thermal limiting provide protection against
overload conditions that would create excessive
junction temperatures.
APPLICATIONS
Motherboard I/O Power Supplies.
Microprocessor Power Supplies.
High -Current Regulators.
Post-regulator for Switching Supplies .
TYPICAL APPLICATION CIRCUIT
V
IN
5V
3
SS6084
2
V
REF
V
OUT
3.3V
1 ADJ
C1 +
10µF
RF1
125Ω
+
1%
C2
RF2
10µF
205Ω
1%
V
REF
=V
OUT
-V
ADJ
=1.25V (typ. )
V
OUT
=V
REF
x (1+RF2/RF1)+ I
ADJ
x RF2
I
ADJ
=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
V
IN
5V
3
SS6084-33
2
V
OUT
3.3V
1
C1 +
10µF
GND
+
C2
10µF
Fixed Voltage Regulator
Rev.2.02 4/06/2004
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SS6084
ORDERING INFORMATION
SS608 4- XXCXXX
Packing type
TB: tubes
TR: tape and reel
Package type
E: TO- 252
M: TO-263
T: TO -220
Output voltage
Default : adjustable
15: 1.5V
18: 1.8V
25: 2.5V
33: 3.3V
TO-252
TOP VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
PIN CONFIGURATION
1
2
3
TO-263
TOP VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
TO-220
FRONT VIEW
1: ADJ (GND)
2: VOUT (TAB)
3: VIN
1
2
3
Example: SS6084 -15CETR
à
1.5V fixed output in TO -252
shipped in tape and reel
ABSOLUTE MAXIMUM RATINGS
VIN pin to ADJ/GND pin
Operating Junction Temperature Range
Storage Temperature Range
Thermal Resistance Junction to Case
TO-252
TO-263, TO -220
Thermal Resistance Junction to Ambient
TO-252
TO-220
Lead Temperature (Soldering) 10 sec.
(Assume no ambient airflow, no heatsink) TO-263
7V
0°C~ 125°C
- 65°C ~ 150°C
12.5°C/W
3°C /W
100°C/W
60°C /W
50°C /W
260°C
Rev.2.02 4/06/2004
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SS6084
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
ELECTRICAL CHARACTERISTICS
(V
IN
=5V, T
J
=25° C, I
O
=10mA, unless otherwise specified)
PARAMETER
Reference Voltage
TEST CONDITIONS
SS6084 (ADJ)
T
J
=25° C
SS6084 -15, V
IN
=5V
SS6084 -18, V
IN
=5V
SS6084 -25, V
IN
=5V
SS6084 -33, V
IN
=5V
ADJ : 2.65V
≤
V
IN
≤7V
Line Regulation
V
OUT
=1.25V
Fix : V
OUT
+1.4V
≤
V
IN
≤
7V
T
J
=25° C
Load Regulation
10mA < I
O
< 5A
T
J
=25° C
∆V
OUT
,
∆V
REF
=1%
10mA
≤
I
O
≤
5A
0°C
≤
T
J
≤
125
°C
Current Limit
Adjusted Pin Current
Adjusted Pin Current Change
(∆I
ADJ
)
Temperature Stability
Minimum Load Current
RMS Output Noise (% of V
OUT
)
Ripple Rejection Ratio
0°C
≤
T
J
≤125°
C
2.65V
≤
V
IN
≤
7V
2. 65V
≤
V
IN
≤
7V
0°C
≤
T
J
≤
125
°C
I
O
=0.5A
0°C
≤
T
J
≤
125
°C
0°C
≤
T
J
≤125°
C
10Hz
≤
f
≤
10KHz
120Hz input ripple
C
OUT
=25µF
(V
IN
-V
OUT
)=3V
60
72
dB
5
6
55
0.2
0.5
5
0.003
10
120
5
A
µA
µA
%
mA
%
1.3
0.6
%
0.015
0.2
%
MIN.
1.238
1.48
1.78
2.47
3.26
TYP.
1.25
1.50
1.80
2.50
3.30
MAX.
1.262
1.52
1.82
2.53
3.34
V
UNIT
V
Output Voltage
Dropout Voltage
1.4
V
Rev.2.02 4/06/2004
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SS6084
TYPICAL PERFORMANCE CHARACTERISTICS
(Continued)
1.35
Minimum Operating Current (mA)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1
2
3
4
5
Minimum differential Voltage (V)
1.30
1.25
1.20
1.15
1.10
1.05
0
1
2
3
4
5
Fig. 3
5
Output Current (A)
Dropout Voltage (V
OUT
=3.3V)
8
7
Differential Voltage (V)
Fig. 4 Minimum Operating Current
Minimum
Operating Current (mA)
4
Short
Circuit
Current (A)
1
2
3
4
5
6
7
8
9
6
5
4
3
2
1
3
2
1
0
0
1
2
3
4
5
6
7
Differential Voltage (V)
Fig. 5
Minimum Operating Current
V
IN
-V
OUT
(V)
Fig. 6 SS6084 (A DJ.) Short Circuit Current
-20
Ripple Rejection Ratio (dB)
-30
-40
C
OUT
=3.3µF
-50
C
OUT
=10
µF
-60
-70
C
OUT
=25µF
-80
1
10
2
10
3
10
4
10
5
10
6
10
7
10
Frequency (Hz)
Fig. 7
SS6084 (ADJ.) Ripple Rejection
Rev.2.02 4/06/2004
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