ETC 52F2278

MC33269
Low Dropout Positive Fixed
and Adjustable Voltage
Regulators
The MC33269 series are low dropout, medium current, fixed and
adjustable, positive voltage regulators specifically designed for use in
low input voltage applications. These devices offer the circuit designer
an economical solution for precision voltage regulation, while keeping
power losses to a minimum.
The regulator consists of a 1.0 V dropout composite PNP–NPN pass
transistor, current limiting, and thermal shutdown.
• 3.3 V, 5.0 V, 12 V and Adjustable Versions.
2.85 V version available as MC34268.
• Space Saving DPAK, SOP–8 and SOT–223 Power Packages
• 1.0 V Dropout
• Output Current in Excess of 800 mA
• Thermal Protection
• Short Circuit Protection
• Output Trimmed to 1.0% Tolerance
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SOP–8
D SUFFIX
CASE 751
8
1
Gnd/Adj
Vout
Vin
1
8
2
7
3
6
4
5
NC
DPAK
DT SUFFIX
CASE 369A
1
Adj
Adj
Adj
3.3 V
3.3 V
3.3 V
3.3 V
Vout
(Top View)
3
DEVICE TYPE / NOMINAL OUTPUT VOLTAGE
MC33269D
MC33269DT
MC33269T
MC33269D–3.3
MC33269DT–3.3
MC33269T–3.3
MC33269ST–3.3
NC
MC33269D–5.0
MC33269DT–5.0
MC33269T–5.0
MC33269D–12
MC33269DT–12
MC33269T–12
5.0 V
5.0 V
5.0 V
12 V
12 V
12 V
1. Gnd/Adj
2. Vout
1
2
3
3. Vin
SOT–223
ST SUFFIX
CASE 318E
(Top View)
1
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
TO–220AB
T SUFFIX
CASE 221A
1
Pin: 1.
2.
3.
2
3
Gnd/Adj
Vout
Vin
1 2 3
(Top View)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
 Semiconductor Components Industries, LLC, 2000
April, 2000 – Rev. 8
1
Publication Order Number:
MC33269/D
MC33269
MAXIMUM RATINGS
Rating
Power Supply Input Voltage
Power Dissipation
Case 369A (DPAK)
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 751 (SOP–8)
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 221A
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 318E
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Operating Junction Temperature Range
Storage Temperature
Symbol
Value
Unit
Vin
20
V
PD
θJA
θJC
Internally Limited
92
6.0
W
°C/W
°C/W
PD
θJA
θJC
Internally Limited
160
25
W
°C/W
°C/W
PD
θJA
θJC
Internally Limited
65
5.0
W
°C/W
°C/W
PD
θJA
θJC
Internally Limited
245
15
W
°C/W
°C/W
TJ
–40 to +150
°C
Tstg
–55 to +150
°C
NOTE: ESD data available upon request.
ELECTRICAL CHARACTERISTICS (CO = 10 µF, TA = 25°C, for min/max values TJ = –40°C to +125°C, unless otherwise noted.)
Characteristic
Symbol
Output Voltage (Iout = 10 mA, TJ = 25°C)
3.3 Suffix (VCC = 5.3 V)
5.0 Suffix (VCC = 7.0 V)
12 Suffix (VCC = 14 V)
VO
Output Voltage (Line, Load and Temperature) (Note 1.)
(1.25 V ≤ Vin – Vout ≤ 15 V, Iout = 500 mA)
(1.35 V ≤ Vin – Vout ≤ 10 V, Iout = 800 mA)
3.3 Suffix
5.0 Suffix
12 Suffix
VO
Reference Voltage (Iout = 10 mA, Vin – Vout = 2.0 V, TJ = 25°C)
for Adjustable Voltage
Reference Voltage (Line, Load and Temperature) (Note 1.)
(1.25 V ≤ Vin – Vout ≤ 15 V, Iout = 500 mA)
(1.35 V ≤ Vin – Vout ≤ 10 V, Iout = 800 mA)
for Adjustable Voltage
Min
Typ
Max
3.27
4.95
11.88
3.3
5.0
12
3.33
5.05
12.12
Unit
V
V
3.23
4.9
11.76
3.3
5.0
12
3.37
5.1
12.24
Vref
1.235
1.25
1.265
V
Vref
1.225
1.25
1.275
V
Line Regulation
(Iout = 10 mA, Vin = [Vout + 1.5 V] to Vin = 20 V, TJ = 25°C)
Regline
–
–
0.3
%
Load Regulation (Vin = Vout + 3.0 V, Iout = 10 mA to 800 mA, TJ = 25°C)
Regload
–
–
0.5
%
–
–
1.0
1.1
1.25
1.35
RR
55
–
–
dB
Current Limit (Vin – Vout = 10 V)
ILimit
800
–
–
mA
Quiescent Current (Fixed Output)
(1.5 V ≤ Vout ≤ 3.3 V)
(5 V ≤ Vout ≤ 12 V)
IQ
–
–
5.5
–
8.0
20
Dropout Voltage
(Iout = 500 mA)
(Iout = 800 mA)
Vin – Vout
Ripple Rejection
(10 Vpp, 120 Hz Sinewave; Iout = 500 mA)
V
mA
1. The MC33269–12, Vin – Vout is limited to 8.0 V maximum, because of the 20 V maximum rating applied to Vin.
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MC33269
ELECTRICAL CHARACTERISTICS (CO = 10 µF, TA = 25°C, for min/max values TJ = –40°C to +125°C, unless otherwise noted.)
Characteristic
Symbol
Minimum Required Load Current
Fixed Output Voltage
Adjustable Voltage
Min
Typ
Max
–
8.0
–
–
0
–
–
–
120
ILoad
Adjustment Pin Current
IAdj
Internal Schematic
Unit
mA
µA
Vin
Vout
Trim Links
VAdj
Gnd
This device contains 38 active transistors.
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MC33269
∆ VO , OUTPUT
VOLTAGE DEVIATION
1.3
TA = –40°C
TA = 25°C
1.1
TA = 125°C
0.9
0.7
0.5
100
mV/Div
Cin = 10 µF
CO = 10 µF Tantalum
Vin = VO + 3.0 V
Preload = 0.1 A
I O , OUTPUT
CURRENT
Vin –Vout , DROPOUT VOLTAGE (V)
1.5
0
200
400
600
800
0.5 A
0A
1000
20 ms/DIV
IO, OUTPUT LOAD CURRENT (mA)
Figure 2. Transient Load Regulation
1.6
1100
IO = 800 mA
1.4
1060
OUTPUT CURRENT (A)
V FB(OV), OVERVOLTAGE INPUT THRESHOLD (%VFB )
Figure 1. Dropout Voltage versus
Output Load Current
1020
980
1.0
TA = 25°C
MC33269D–XX
L = 25 mm Copper
0.8
0.6
0.4
940
0.2
900
–55
0
–25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
100
4.0
6.0
8.0
10
12
14
16
Figure 4. MC33269–XX Output DC Current versus
Input–Output Differential Voltage
70
RR, RIPPLE REJECTION RATIO (dB)
VO = 3.3 V or 5.0 V
60
VO = 12 V
50
Vin = VO + 3.0 V
IL = 800 mA
TA = 25°C
30
20
0.1
2.0
INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
70
40
0
125
Figure 3. Dropout Voltage
versus Temperature
RR, RIPPLE REJECTION RATIO (dB)
1.2
1.0
10
f, FREQUENCY (kHz)
60
50
40
30
20
0.1
100
Vin = 8.0 V
Vout = 5.0 V
IL = 800 mA
CAdj = 22 µF
TA = 25°C
Figure 5. MC33269 Ripple Rejection
versus Frequency
1.0
10
f, FREQUENCY (kHz)
Figure 6. MC33269–ADJ Ripple Rejection
versus Frequency
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100
3.2
2.8
PD(max) for TA = 50°C
130
110
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
Graph represents symmetrical layout
90
L
70
2.0 oz.
Copper
L
50
30
10
20
2.0
1.6
1.2
3.0 mm
RθJA
0
2.4
30
0.8
0.4
50
40
L, LENGTH OF COPPER (mm)
2.4
100
PD(max) for TA = 50°C
Free Air
Mounted
Vertically
90
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
2.0 oz. Copper
L
80
Minimum
Size Pad
70
L
60
50
40
5.0
10
15
JUNCTION-TO-AIR (°C/W)
PD(max) for TA = 50°C
1.25
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
200
Minimum
Size Pad
120
2.0 oz. Copper
L
0.83
L
0.63
0.50
80
0.42
RθJA
40
0
5.0
10
0.8
0.4
20
25
30
L, LENGTH OF COPPER (mm)
2.50
160
1.2
0
0
280
240
1.6
Figure 8. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Figure 7. SOP–8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Free Air
Mounted
Vertically
2.0
RθJA
15
20
25
30
0.35
L, LENGTH OF COPPER (mm)
Figure 9. SOT–223 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
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PD, MAXIMUM POWER DISSIPATION (W)
150
R θ JA, THERMAL RESISTANCE, JUNCTION–TO–AIR (°C/W)
170
R θ JA, THERMAL RESISTANCE
R θ JA, THERMAL RESISTANCE, JUNCTION–TO–AIR (°C/W)
MC33269
MC33269
APPLICATIONS INFORMATION
supply input filter with long wire lengths. This will reduce
the circuit’s sensitivity to the input line impedance at high
frequencies. A 0.33 µF or larger tantalum, mylar, ceramic,
or other capacitor having low internal impedance at high
frequencies should be chosen. The bypass capacitor should
be mounted with shortest possible lead or track length
directly across the regulator’s input terminals. Applications
should be tested over all operating conditions to insure
stability.
Internal thermal limiting circuitry is provided to protect
the integrated circuit in the event that the maximum junction
temperature is exceeded. When activated, typically at
170°C, the output is disabled. There is no hysteresis built
into the thermal limiting circuit. As a result, if the device is
overheating, the output will appear to be oscillating. This
feature is provided to prevent catastrophic failures from
accidental device overheating. It is not intended to be used
as a substitute for proper heatsinking.
Figures 10 through 14 are typical application circuits. The
output current capability of the regulator is in excess of
800 mA, with a typical dropout voltage of less than 1.0 V.
Internal protective features include current and thermal
limiting.
The MC33269 is not internally compensated and thus
requires an external output capacitor for stability. The
capacitor should be at least 10 µF with an equivalent series
resistance (ESR) of less than 10 Ω over the anticipated
operating temperature range. With economical electrolytic
capacitors, cold temperature operation can pose a problem.
As temperature decreases, the capacitance also decreases
and the ESR increases, which could cause the circuit to
oscillate. Solid tantalum capacitors may be a better choice
if small size is a requirement. Also capacitance and ESR of
a solid tantalum capacitor is more stable over temperature.
An input bypass capacitor is recommended to improve
transient response or if the regulator is connected to the
Vin
MC33269
Cin
CO
10 µF
Cin
Vout
Vin
Vout
MC33269–XX
R1
Adj
Gnd
R2
CAdj*
An input capacitor is not necessary for stability, however
it will improve the overall performance.
V out
Figure 10. Typical Fixed Output Application
RS
Vin
CO
10 µF
Adj
I out
ǒ Ǔ
+ 1.25 1 ) R2
) IAdj R2
R1
*CAdj is optional, however it will improve the ripple rejection.
The MC34269 develops a 1.25 V reference voltage between the
output and the adjust terminal. Resistor R1, operates with
constant current to flow through it and resistor R2. This current
should be set such that the Adjust Pin current causes negligible
drop across resistor R2. The total current with minimum load
should be greater than 8.0 mA.
Iout
MC33269
Cin
CO
10 µF
+ 1.25
R
Figure 11. Typical Adjustable Output Application
S
Figure 12. Current Regulator
Vout
Vin
MC33269–XX
Cin
Vout
Vin
MC33269
Gnd
Cin
R1
Adj
R2
CO
10 µF
MC33269–XX
CO
10 µF
Cin
Gnd
The Schottky diode in series with the ground leg of the upper
regulator shifts its output voltage higher by the forward
voltage drop of the diode. This will cause the lower device
to remain off until the input voltage is removed.
R2 sets the maximum output voltage. Each transistor
reduces the output voltage when turned on.
Figure 13. Battery Backed–Up Power Supply
Figure 14. Digitally Controlled Voltage Regulator
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MC33269
ORDERING INFORMATION
Device
Package
Shipping Information
MC33269D
SO–8
98 Units / Rail
MC33269DR2
SO–8
2500 Units / Tape & Reel
MC33269DT
DPAK
75 Units / Rail
DPAK
2500 Units / Tape & Reel
TO–220
50 Units / Rail
MC33269DTRK
MC33269T
MC33269D–3.3
SO–8
98 Units / Rail
MC33269DR2–3.3
SO–8
2500 Units / Tape & Reel
MC33269DT–3.3
DPAK
75 Units / Rail
MC33269DTRK–3.3
DPAK
2500 Units / Tape & Reel
MC33269ST–3.3T3
SOT–223
4000 Units / Tape & Reel
MC33269T–3.3
TO–220
50 Units / Rail
MC33269D–5.0
SO–8
98 Units / Rail
MC33269DR2–5.0
SO–8
2500 Units / Tape & Reel
MC33269DT–5.0
DPAK
75 Units / Rail
MC33269DTRK–5.0
DPAK
2500 Units / Tape & Reel
MC33269T–5.0
TO–220
50 Units / Rail
MC33269D–12
SO–8
98 Units / Rail
MC33269DR2–12
SO–8
2500 Units / Tape & Reel
MC33269DT–12
DPAK
75 Units / Rail
MC33269DTRK–12
DPAK
2500 Units / Tape & Reel
TO–220
50 Units / Rail
MC33269T–12
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MC33269
PACKAGE DIMENSIONS
SOP–8
D SUFFIX
CASE 751–06
ISSUE T
D
A
NOTES:
1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.
2. DIMENSIONS ARE IN MILLIMETER.
3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.
C
8
5
0.25
H
E
B
M
M
1
4
h
B
X 45 _
q
e
A
C
SEATING
PLANE
L
0.10
A1
B
0.25
M
C B
S
A
S
DIM
A
A1
B
C
D
E
e
H
h
L
q
MILLIMETERS
MIN
MAX
1.35
1.75
0.10
0.25
0.35
0.49
0.19
0.25
4.80
5.00
3.80
4.00
1.27 BSC
5.80
6.20
0.25
0.50
0.40
1.25
0_
7_
DPAK
DT SUFFIX
CASE 369A–13
ISSUE Z
–T–
C
B
V
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
SEATING
PLANE
E
R
4
Z
A
S
1
2
3
U
K
F
J
L
H
D
G
2 PL
0.13 (0.005)
M
T
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DIM
A
B
C
D
E
F
G
H
J
K
L
R
S
U
V
Z
INCHES
MIN
MAX
0.235
0.250
0.250
0.265
0.086
0.094
0.027
0.035
0.033
0.040
0.037
0.047
0.180 BSC
0.034
0.040
0.018
0.023
0.102
0.114
0.090 BSC
0.175
0.215
0.020
0.050
0.020
–––
0.030
0.050
0.138
–––
MILLIMETERS
MIN
MAX
5.97
6.35
6.35
6.73
2.19
2.38
0.69
0.88
0.84
1.01
0.94
1.19
4.58 BSC
0.87
1.01
0.46
0.58
2.60
2.89
2.29 BSC
4.45
5.46
0.51
1.27
0.51
–––
0.77
1.27
3.51
–––
MC33269
PACKAGE DIMENSIONS
SOT–223
ST SUFFIX
CASE 318E–04
ISSUE K
A
F
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
4
S
B
1
2
3
D
L
G
J
C
0.08 (0003)
M
H
INCHES
DIM MIN
MAX
A
0.249
0.263
B
0.130
0.145
C
0.060
0.068
D
0.024
0.035
F
0.115
0.126
G
0.087
0.094
H 0.0008 0.0040
J
0.009
0.014
K
0.060
0.078
L
0.033
0.041
M
0_
10 _
S
0.264
0.287
MILLIMETERS
MIN
MAX
6.30
6.70
3.30
3.70
1.50
1.75
0.60
0.89
2.90
3.20
2.20
2.40
0.020
0.100
0.24
0.35
1.50
2.00
0.85
1.05
0_
10 _
6.70
7.30
K
TO–220AB
T SUFFIX
CASE 221A–09
ISSUE AA
–T–
B
SEATING
PLANE
C
F
T
S
4
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
A
Q
1 2 3
U
H
K
Z
L
R
V
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.
J
G
D
N
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9
INCHES
MIN
MAX
0.570
0.620
0.380
0.405
0.160
0.190
0.025
0.035
0.142
0.147
0.095
0.105
0.110
0.155
0.018
0.025
0.500
0.562
0.045
0.060
0.190
0.210
0.100
0.120
0.080
0.110
0.045
0.055
0.235
0.255
0.000
0.050
0.045
–––
–––
0.080
MILLIMETERS
MIN
MAX
14.48
15.75
9.66
10.28
4.07
4.82
0.64
0.88
3.61
3.73
2.42
2.66
2.80
3.93
0.46
0.64
12.70
14.27
1.15
1.52
4.83
5.33
2.54
3.04
2.04
2.79
1.15
1.39
5.97
6.47
0.00
1.27
1.15
–––
–––
2.04
MC33269
Notes
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MC33269
Notes
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MC33269
ON Semiconductor and
are 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
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MC33269/D