CS5206−1, CS5206−3,
CS5206−5
6.0 A Adjustable, and
Fixed 3.3 V and 5.0 V
Linear Regulators
The CS5206−X series of linear regulators provides 6.0 A at
adjustable and fixed voltages of 3.3 V and 5.0 V with an accuracy of
±1% and ±2% respectively. The adjustable version uses two external
resistors to set the output voltage within a 1.25 V to 13 V range.
The regulators are intended for use as post regulators and
microprocessor supplies. The fast loop response and low dropout
voltage make these regulators ideal for applications where low voltage
operation and good transient response are important.
The circuit is designed to operate with dropout voltages as low as
1.0 V depending on the output current level. The maximum quiescent
current is only 10 mA at full load.
The regulators are fully protected against overload conditions with
protection circuitry for Safe Operating Area (SOA), overcurrent and
thermal shutdown.
The regulators are available in TO−220−3 and surface mount
D2PAK−3 packages.
Adjustable
Output
Output Current to 6.0 A
Output Trimmed to ±1%
Dropout Voltage 1.3 V @ 6.0 A
Fast Transient Response
Fault Protection Circuitry
− Thermal Shutdown
− Overcurrent Protection
− Safe Area Protection
Tab = VOUT
Pin 1. Adj
2. VOUT
3. VIN
TO−220−3
T SUFFIX
CASE 221A
1
2
Fixed
Output
3
Tab = VOUT
Pin 1. GND
2. VOUT
3. VIN
D2PAK−3
DP SUFFIX
CASE 418AB
12
3
MARKING DIAGRAMS
TO−220−3
Features
•
•
•
•
•
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D2PAK−3
CS5206−x
AWLYWW
CS5206−x
AWLYWW
1
1
VOUT
x
A
WL, L
YY, Y
WW, W
= 1, 3, or 5
= Assembly Location
= Wafer Lot
= Year
= Work Week
VIN
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
Output
Current
Limit
Thermal
Shutdown
− +
Error
Amplifier
Adj
Bandgap
Figure 1. Block Diagram − CS5206−1
Semiconductor Components Industries, LLC, 2004
January, 2004 − Rev. 7
1
Publication Order Number:
CS5206/D
CS5206−1, CS5206−3, CS5206−5
VOUT
VIN
Output
Current
Limit
Thermal
Shutdown
− + Error
Amplifier
Bandgap
Gnd
Figure 2. Block Diagram − CS5206−2, −3
MAXIMUM RATINGS*
Parameter
Supply Voltage, VCC
Operating Temperature Range
Junction Temperature
Storage Temperature Range
Lead Temperature Soldering:
Wave Solder (through hole styles only) Note 1
Reflow (SMD styles only) Note 2
Value
Unit
17
V
−40 to +70
°C
150
°C
−60 to +150
°C
260 Peak
230 Peak
°C
1. 10 second maximum.
2. 60 second maximum above 183°C.
*The maximum package power dissipation must be observed.
ELECTRICAL CHARACTERISTICS (CIN = 10 µF, COUT = 22 µF, Tantalum, VIN − VOUT = 3.0 V, VIN ≤ 15 V, 0°C ≤ TA ≤ 70°C,
TJ = +150°C, unless otherwise specified, Ifull load = 6.0 A.)
Test Conditions
Characteristic
Min
Typ
Max
Unit
1.241
(−1%)
1.254
1.266
(+1%)
V
Adjustable Output Voltage (CS5206−1)
Reference Voltage (Notes 3 and 4)
VIN − VOUT = 1.5 V; VAdj = 0 V,
10 mA ≤ IOUT ≤ 6.0 A
Line Regulation
1.5 V ≤ VIN − VOUT ≤ 6.0 V; IOUT = 10 mA
0.04
0.20
%
Load Regulation (Notes 3 and 4)
VIN − VOUT = 1.5 V; 10 mA ≤ IOUT ≤ 6.0 A
0.1
0.4
%
Dropout Voltage (Note 5)
IOUT = 6.0 A
1.3
1.4
V
Current Limit
VIN − VOUT = 3.0 V; TJ ≥ 25°C
VIN − VOUT = 9.0 V
8.5
1.0
6.0
A
A
Minimum Load Current
VIN − VOUT = 7.0 V
1.2
100
mA
50
5.0
µA
Adjust Pin Current
Adjust Pin Current Change
1.5 V ≤ VIN − VOUT ≤ 4.0 V;
10 mA ≤ IOUT ≤ 6.0 A
Thermal Regulation
30 ms pulse; TA = 25°C
6.5
0.2
µA
0.003
%/W
3. Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output
voltage due to thermal gradients or temperature changes must be taken into account separately.
4. Specifictions apply for an external Kelvin sense connection atr a point on the output pin 1/4” from the bottom of the package.
5. Dropout voltage is a measurement of the minimum input/output differentail at full load.
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2
CS5206−1, CS5206−3, CS5206−5
ELECTRICAL CHARACTERISTICS continued (CIN = 10 µF, COUT = 22 µF, Tantalum, VIN − VOUT = 3.0 V, VIN ≤ 15 V,
0°C ≤ TA ≤ 70°C, TJ = +150°C, unless otherwise specified, Ifull load = 6.0 A.)
Test Conditions
Characteristic
Min
Typ
Max
Unit
Adjustable Output Voltage (CS5206−1) continued
f = 120 Hz; CAdj = 25 µF; IOUT = 6.0 A
Ripple Rejection
Temperature Stability
10 Hz ≤ f ≤ 10 kHz; TA = 25°C
RMS Output Noise
Thermal Shutdown
150
Thermal Shutdown Hysteresis
82
dB
0.5
%
0.003
%VOUT
180
°C
25
°C
ELECTRICAL CHARACTERISTICS (CIN = 10 µF, COUT = 22 µF, Tantalum, VIN − VOUT = 3.0 V, VIN ≤ 10 V, 0°C ≤ TA ≤ 70°C,
TJ = +150°C, unless otherwise specified, Ifull load = 6.0 A.)
Test Conditions
Characteristic
Min
Typ
Max
4.9 (−2%)
3.234 (−2%)
5.0
3.3
5.1 (+2%)
3.366 (+2%)
Unit
Fixed Output Voltage (CS5206−3, CS5206−5)
Reference Voltage (Notes 6 and 7)
CS5206−5
CS5206−3
VIN − VOUT = 1.5 V; VAdj = 0 V,
10 mA ≤ IOUT ≤ 6.0 A
Line Regulation
1.5 V ≤ VIN − VOUT ≤ 6.0 V; IOUT = 10 mA
0.04
0.20
%
Load Regulation (Notes 6 and 7)
VIN − VOUT = 1.5 V; 10 mA ≤ IOUT ≤ 6.0 A
0.1
0.4
%
Dropout Voltage (Note 8)
IOUT = 6.0 A
1.3
1.4
V
Current Limit
VIN − VOUT = 3.0 V; TJ ≥ 25°C
VIN − VOUT = 9.0 V
8.5
1.0
6.0
A
A
Quiescent Current
VIN ≤ 9.0 V; IOUT = 10 mA
5.0
10
mA
Thermal Regulation
30 ms pulse; TA = 25°C
Ripple Rejection
f = 120 Hz; CAdj = 25 µF; IOUT = 6.0 A
V
6.5
Temperature Stability
RMS Output Noise (%VOUT)
10 Hz ≤ f ≤ 10 kHz
Thermal Shutdown
150
Thermal Shutdown Hysteresis
0.003
%/W
75
dB
0.5
%
0.003
%VOUT
180
°C
25
°C
6. Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output
voltage due to thermal gradients or temperature changes must be taken into account separately.
7. Specifictions apply for an external Kelvin sense connection atr a point on the output pin 1/4” from the bottom of the package.
8. Dropout voltage is a measurement of the minimum input/output differentail at full load.
PACKAGE PIN DESCRIPTION
Package Pin Number
CS5206−1
D2PAK−3
CS5206−3, CS5206−5
TO−220−3
D2PAK−3
TO−220−3
Pin Symbol
Function
1
1
N/A
N/A
Adj
Adjust pin (low side of the internal reference)
2
2
2
2
VOUT
3
3
3
3
VIN
Input voltage
N/A
N/A
1
1
Gnd
Ground connection
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3
Regulated output voltage (case)
CS5206−1, CS5206−3, CS5206−5
TYPICAL PERFORMANCE CHARACTERISTICS
0.10
1.4
0.08
Output Voltage Deviation (%)
Dropout Voltage (V)
1.3
TCASE = 0°C
1.2
1.1
TCASE = 25°C
1.0
TCASE = 125°C
0.9
0.8
0.7
0
1
2
3
4
5
0.04
0.00
−0.04
−0.08
−0.12
0
6
TJ (°C)
Figure 3. Dropout Voltage vs. Output Current
Figure 4. Reference Voltage vs. Temperature
0.200
2.500
Minimum Load Current (mA)
0.175
0.150
TCASE = 125°C
0.125
0.100
TCASE = 25°C
0.075
0.050
0.025
2.175
TCASE = 0°C
1.850
1.525
1.200
0.875
TCASE = 25°C
TCASE = 125°C
TCASE = 0°C
0.000
0
1
2
3
4
Output Current (A)
5
0.550
1
6
Figure 5. Load Regulation vs. Output Current
3
4
5
6
VIN − VOUT (V)
7
8
9
100
65
80
Ripple Rejection (dB)
IO = 10 mA
60
55
50
60
40
20
45
40
0
2
Figure 6. Minimum Load Current
70
Adjust Pin Current (µA)
Output Voltage Deviation, (%)
10 20 30 40 50 60 70 80 90 100 110 120 130
Output Current (A)
20
40
60
80
Temperature (°C)
100
0
101
120
TCASE = 25°C
IOUT = 6.0 A
(VIN − VOUT = 3.0 V)
VRIPPLE = 1.6 VPP
102
103
Frequency (Hz)
104
Figure 8. Ripple Rejection vs. Frequency
(Fixed Versions)
Figure 7. Adjust Pin Current vs. Temperature
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4
105
CS5206−1, CS5206−3, CS5206−5
100
Ripple Rejection (dB)
80
60
40
20
0
101
TCASE = 25°C
IOUT = 6.0 A
(VIN − VOUT = 3.0 V)
VRIPPLE = 1.6 VPP
CAdj = 25 µF
102
103
Frequency (Hz)
104
105
Figure 9. Ripple Rejection vs. Frequency
(Adjustable Version)
APPLICATIONS INFORMATION
bypassed to improve the transient response and ripple
rejection of the regulator.
The CS5206−X family of linear regulators provide fixed
or adjustable voltages at currents up to 6.0 A. The regulators
are protected against short circuit, and include thermal
shutdown and safe area protection (SOA) circuitry. The
SOA protection circuitry decreases the maximum available
output current as the input−output differential voltage
increases.
The CS5206−X has a composite PNP−NPN output
transistor and requires an output capacitor for stability. A
detailed procedure for selecting this capacitor is included in
the Stability Considerations section.
VIN
VOUT
VIN
C1
CS5206−1
VREF
Adj
R1
C2
IAdj
Adjustable Operation
CAdj
The adjustable regulator (CS5206−1) has an output
voltage range of 1.25 V to 13 V. An external resistor divider
sets the output voltage as shown in Figure 10. The regulator
maintains a fixed 1.25 V (typical) reference between the
output pin and the adjust pin.
A resistor divider network R1 and R2 causes a fixed
current to flow to ground. This current creates a voltage
across R2 that adds to the 1.25 V across R1 and sets the
overall output voltage. The adjust pin current (typically
50 µA) also flows through R2 and adds a small error that
should be taken into account if precise adjustment of VOUT
is necessary.
The output voltage is set according to the formula:
VOUT
R2
Figure 10. Resistor Divider Scheme for the
Adjustable Version
Stability Considerations
The output or compensation capacitor helps determine
three main characteristics of a linear regulator: start−up
delay, load transient response and loop stability.
The capacitor value and type is based on cost, availability,
size and temperature constraints. A tantalum or aluminum
electrolytic capacitor is best, since a film or ceramic
capacitor with almost zero ESR, can cause instability. The
aluminum electrolytic capacitor is the least expensive
solution. However, when the circuit operates at low
temperatures, both the value and ESR of the capacitor will
vary considerably. The capacitor manufacturers data sheet
provides this information.
A 22 µF tantalum capacitor will work for most
applications, but with high current regulators such as the
VOUT VREF R1 R2 IAdj R2
R1
The term IAdj × R2 represents the error added by the adjust
pin current.
R1 is chosen so that the minimum load current is at least
10 mA. R1 and R2 should be the same type, e.g. metal film
for best tracking over temperature. The adjust pin is
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5
CS5206−1, CS5206−3, CS5206−5
Output Voltage Sensing
CS5206−X the transient response and stability improve with
higher values of capacitor. The majority of applications for
this regulator involve large changes in load current so the
output capacitor must supply the instantaneous load current.
The ESR of the output capacitor causes an immediate drop
in output voltage given by:
Since the CS5206−X is a three terminal regulator, it is not
possible to provide true remote load sensing. Load
regulation is limited by the resistance of the conductors
connecting the regulator to the load. For best results the
fixed regulators should be connected as shown in Figure 13.
Conductor Parasitic
Resistance
V I ESR
VIN
For microprocessor applications it is customary to use an
output capacitor network consisting of several tantalum and
ceramic capacitors in parallel. This reduces the overall ESR
and reduces the instantaneous output voltage drop under
load transient conditions. The output capacitor network
should be as close as possible to the load for the best results.
VIN
VOUT
RC
CS5206−X
RLOAD
Gnd
Protection Diodes
When large external capacitors are used with a linear
regulator it is sometimes necessary to add protection diodes.
If the input voltage of the regulator gets shorted, the output
capacitor will discharge into the output of the regulator. The
discharge current depends on the value of the capacitor, the
output voltage and the rate at which VIN drops. In the
CS5206−X family of linear regulators, the discharge path is
through a large junction and protection diodes are not
usually needed. If the regulator is used with large values of
output capacitance and the input voltage is instantaneously
shorted to ground, damage can occur. In this case, a diode
connected as shown in Figures 11 and 12 is recommended.
Figure 13. Conductor Parasitic Resistance can be
Minimized with the Above Grounding Scheme for
Fixed Output Regulators
For the adjustable regulator, the best load regulation
occurs when R1 is connected directly to the output pin of the
regulator as shown in Figure 14. If R1 is connected to the
load, RC is multiplied by the divider ratio and the effective
resistance between the regulator and the load becomes
RC R1 R2
R1
where RC = conductor parasitic resistance.
IN4002 (optional)
VIN
VIN
C1
VOUT
CS5206−1
VIN
VOUT
VIN
RC
VOUT
Conductor Parasitic
Resistance
CS5206−1
Adj
R1
CAdj
R1
Adj
C2
RLOAD
R2
R2
Figure 11. Protection Diode Scheme for Adjustable
Output Regulator
Figure 14. Grounding Scheme for Adjustable Output
Regulator to Minimize Parasitics
IN4002 (optional)
VIN
VOUT
VIN
VOUT
Calculating Power Dissipation and Heat Sink
Requirements
CS5206−1
C1
Gnd
The CS5206−X series of linear regulators includes
thermal shutdown and safe operating area circuitry to
protect the device. High power regulators such as these
usually operate at high junction temperatures so it is
important to calculate the power dissipation and junction
C2
Figure 12. Protection Diode Scheme for Fixed Output
Regulators
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6
CS5206−1, CS5206−3, CS5206−5
temperatures accurately to ensure that an adequate heat sink
is used.
The case is connected to VOUT on the CS5206−X,
electrical isolation may be required for some applications.
Thermal compound should always be used with high current
regulators such as these.
The thermal characteristics of an IC depend on the
following four factors:
1.
2.
3.
4.
A heat sink effectively increases the surface area of the
package to improve the flow of heat away from the IC and
into the surrounding air.
Each material in the heat flow path between the IC and the
outside environment has a thermal resistance. Like series
electrical resistances, these resistances are summed to
determine RΘJA, the total thermal resistance between the
junction and the surrounding air.
1. Thermal Resistance of the junction to case, RΘJC
(°C/W)
2. Thermal Resistance of the case to Heat Sink, RΘCS
(°C/W)
3. Thermal Resistance of the Heat Sink to the ambient
air, RΘSA (°C/W)
These are connected by the equation:
Maximum Ambient Temperature TA (°C)
Power dissipation PD (Watts)
Maximum junction temperature TJ (°C)
Thermal resistance junction to ambient RΘJA (°C/W)
These four are related by the equation
TJ TA PD RJA
(1)
RJA RJC RCS RSA
The maximum ambient temperature and the power
dissipation are determined by the design while the
maximum junction temperature and the thermal resistance
depend on the manufacturer and the package type.
The maximum power dissipation for a regulator is:
(3)
The value for RΘJA is calculated using equation (3) and
the result can be substituted in equation (1).
The value for RΘJC is normally quoted as a single figure
for a given package type based on an average die size. For
a high current regulator such as the CS5206−X the majority
of the heat is generated in the power transistor section. The
value for RΘJSA depends on the heat sink type, while RΘJCS
depends on factors such as package type, heat sink interface
(is an insulator and thermal grease used?), and the contact
area between the heat sink and the package. Once these
calculations are complete, the maximum permissible value
of RΘJA can be calculated and the proper heat sink selected.
For further discussion on heat sink selection, see application
note “Thermal Management,” document number
AND8036/D, available through the Literature Distribution
Center or via our website at http://onsemi.com.
PD(max) {VIN(max) VOUT(min)}IOUT(max) VIN(max)IQ
(2)
where:
VIN(max) is the maximum input voltage,
VOUT(min) is the minimum output voltage,
IOUT(max) is the maximum output current, for the application
IQ is the maximum quiescent current at IOUT(max).
ORDERING INFORMATION
Orderable Part Number
CS5206−1GT3
CS5206−1GDP3
Type
Package
Shipping†
6.0 A, Adj. Output
TO−220−3, Straight
50 Units/Rail
6.0 A, Adj. Output
D2PAK−3
50 Units/Rail
750 Tape & Reel
6.0 A, Adj. Output
D2PAK−3
CS5206−3GT3
6.0 A, 3.3 V Output
TO−220−3, Straight
50 Units/Rail
CS5206−3GDP3
6.0 A, 3.3 V Output
D2PAK−3
50 Units/Rail
CS5206−3GDPR3
6.0 A, 3.3 V Output
D2PAK−3
750 Tape & Reel
CS5206−5GT3
6.0 A, 5.0 V Output
TO−220−3, Straight
50 Units/Rail
CS5206−1GDPR3
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
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7
CS5206−1, CS5206−3, CS5206−5
PACKAGE DIMENSIONS
TO−220−3
T SUFFIX
CASE 221A−08
ISSUE AA
−T−
F
−B−
SEATING
PLANE
C
T
S
4
Q
A
1 2 3
U
H
−Y−
K
L
R
V
G
J
D 3 PL
0.25 (0.010)
M
B
M
Y
N
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8
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
INCHES
MIN
MAX
0.560
0.625
0.380
0.420
0.140
0.190
0.025
0.035
0.139
0.155
0.100 BSC
−−−
0.280
0.012
0.045
0.500
0.580
0.045
0.060
0.200 BSC
0.100
0.135
0.080
0.115
0.020
0.055
0.235
0.255
0.000
0.050
0.045
−−−
MILLIMETERS
MIN
MAX
14.23
15.87
9.66
10.66
3.56
4.82
0.64
0.89
3.53
3.93
2.54 BSC
−−−
7.11
0.31
1.14
12.70
14.73
1.15
1.52
5.08 BSC
2.54
3.42
2.04
2.92
0.51
1.39
5.97
6.47
0.00
1.27
1.15
−−−
CS5206−1, CS5206−3, CS5206−5
PACKAGE DIMENSIONS
D2PAK−3
DP SUFFIX
CASE 418AB−01
ISSUE O
For D2PAK Outline and
Dimensions − Contact Factory
PACKAGE THERMAL DATA
Parameter
TO−220−3
D2PAK−3
Unit
RΘJC
Typical
1.6
1.6
°C/W
RΘJA
Typical
50
10−50*
°C/W
* Depending on thermal properties of substrate. RΘJA = RΘJC + RΘCA
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CS5206−1, CS5206−3, CS5206−5
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
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Phone: 81−3−5773−3850
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For additional information, please contact your
local Sales Representative.
CS5206/D