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부품번호 | CS52015-3 기능 |
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기능 | Linear Regulator | ||
제조업체 | ON Semiconductor | ||
로고 | |||
전체 8 페이지수
www.DataSheet4U.com
CS52015−3
1.5 A, 3.3 V Fixed Linear
Regulator
The CS52015−3 linear regulator provides 1.5 A @ 3.3 V reference
at 1.0 A with an output voltage accuracy of ±1.5%.
The regulator is intended for use as a post regulator and
microprocessor supply. The fast loop response and low dropout
voltage make this regulator ideal for applications where low voltage
operation and good transient response are important.
The circuit is designed to operate with dropout voltages less than 1.4 V
at 1.5 A output current. The maximum quiescent current is only 10 mA
at full load. Device protection includes over−current and thermal
shutdown.
The CS52015−3 is pin compatible with the LT1086 family of linear
regulators but has lower dropout voltage.
The regulator is available in TO−220−3, surface mount D2PAK−3,
and SOT−223 packages.
Features
• Output Current to 1.5 A
• Output Accuracy to ±1.5% Over Temperature
• Dropout Voltage (typical) 1.05 V @ 1.5 A
• Fast Transient Response
• Fault Protection
− Current Limit
− Thermal Shutdown
10 mF
5.0 V
VIN VOUT
CS52015−3
GND
3.3 V @ 1.5 A
22 mF
5.0 V
http://onsemi.com
TO−220−3
T SUFFIX
CASE 221A
12 3
123
12 3
D2PAK−3
DP SUFFIX
CASE 418AB
SOT−223
ST SUFFIX
CASE 318E
Tab = VOUT
Pin 1. GND
2. VOUT
3. VIN
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 6 of this data sheet.
Figure 1. Applications Diagram
© Semiconductor Components Industries, LLC, 2006
September, 2006 − Rev. 8
1
Publication Order Number:
CS52015−3/D
CS52015−3
300
200
100
0
−100
−200
1500
750
0
0
COUT = CIN = 22 mF Tantalum
12345678
Time (mS)
Figure 7. Transient Response
9 10
0.100
0.075
0.050
0.025
0.000
0
TCASE = 25°C
TCASE = 125°C
1
Output Current (A)
TCASE = 0°C
2
Figure 8. Load Regulation vs. Output
Current
APPLICATIONS INFORMATION
The CS52015−3 linear regulator provides a 3.3 V output
voltage at currents up to 1.5 A. The regulator is protected
against overcurrent conditions and includes thermal
shutdown.
The CS52015−3 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.
Stability Considerations
The output 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 manufacturer’s data sheet
provides this information.
A 22 mF tantalum capacitor will work for most
applications, but with high current regulators such as the
CS52015−3 the transient response and stability improve
with higher values of capacitance. 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:
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
transient load conditions. The output capacitor network
should be as close to the load as possible for the best results.
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
CS52015−3 linear regulator, 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 Figure 9 is recommended.
IN4002 (Optional)
VIN
VIN VOUT
CS52015−3
C1
GND
VOUT
C2
DV + DI ESR
Figure 9. Protection Diode Scheme for Large
Output Capacitors
http://onsemi.com
4
4페이지 CS52015−3
PACKAGE DIMENSIONS
TO−220−3
T SUFFIX
CASE 221A−08
ISSUE AA
−B− F
Q
H
−Y−
4
123
A
K
T
U
−T−
SEATING
PLANE
C
S
L
V
G
N
D 3 PL
0.25 (0.010) M B M Y
R
J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
INCHES
DIM MIN MAX
A 0.560 0.625
B 0.380 0.420
C 0.140 0.190
D 0.025 0.035
F 0.139 0.155
G 0.100 BSC
H −−− 0.280
J 0.012 0.045
K 0.500 0.580
L 0.045 0.060
N 0.200 BSC
Q 0.100 0.135
R 0.080 0.115
S 0.020 0.055
T 0.235 0.255
U 0.000 0.050
V 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 −−−
D2PAK−3
DP SUFFIX
CASE 418AB−01
ISSUE O
For D2PAK Outline and
Dimensions − Contact Factory
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |