Semiconductor Components Industries, LLC, 2000
May, 2000 – Rev. 9 1Publication Order Number:
MC33269/D
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
DEVICE TYPE / NOMINAL OUTPUT VOLTAGE
MC33269D Adj MC33269D–5.0 5.0 V
MC33269DT Adj MC33269DT–5.0 5.0 V
MC33269T Adj MC33269T–5.0 5.0 V
MC33269D–3.3 3.3 V MC33269D–12 12 V
MC33269DT–3.3 3.3 V MC33269DT–12 12 V
MC33269T–3.3 3.3 V MC33269T–12 12 V
MC33269ST–3.3 3.3 V
TO–220AB
T SUFFIX
CASE 221A
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See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
ORDERING INFORMATION
8
1
8
7
6
5
1
2
3
4
Gnd/Adj
SOP–8
D SUFFIX
CASE 751
DPAK
DT SUFFIX
CASE 369A
Vin
NC
NC
1. Gnd/Adj
123 2. Vout
3. Vin
(Top View)
(Top View)
1
3
Vout Vout
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Pin: 1. Gnd/Adj
2. Vout
3. Vin
3
12
123
(Top View)
SOT–223
ST SUFFIX
CASE 318E
13
MC33269
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2
MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Input Voltage Vin 20 V
Power Dissipation
Case 369A (DPAK)
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient θJA 92 °C/W
Thermal Resistance, Junction–to–Case θJC 6.0 °C/W
Case 751 (SOP–8)
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient θJA 160 °C/W
Thermal Resistance, Junction–to–Case θJC 25 °C/W
Case 221A
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient θJA 65 °C/W
Thermal Resistance, Junction–to–Case θJC 5.0 °C/W
Case 318E
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient θJA 245 °C/W
Thermal Resistance, Junction–to–Case θJC 15 °C/W
Operating Junction Temperature Range TJ–40 to +150 °C
Storage Temperature 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 Min Typ Max Unit
Output Voltage (Iout = 10 mA, TJ = 25°C) VOV
3.3 Suffix (VCC = 5.3 V) 3.27 3.3 3.33
5.0 Suffix (VCC = 7.0 V) 4.95 5.0 5.05
12 Suf fix (V CC = 14 V) 11.88 12 12.12
Output Voltage (Line, Load and Temperature) (Note 1.) VOV
(1.25 V Vin – Vout 15 V, Iout = 500 mA)
(1.35 V Vin – Vout 10 V, Iout = 800 mA)
3.3 Suffix 3.23 3.3 3.37
5.0 Suffix 4.9 5.0 5.1
12 Suffix 11.76 12 12.24
Reference Voltage (Iout = 10 mA, Vin – Vout = 2.0 V, TJ = 25°C) Vref 1.235 1.25 1.265 V
for Adjustable Voltage
Reference Voltage (Line, Load and Temperature) (Note 1.) Vref 1.225 1.25 1.275 V
(1.25 V Vin – Vout 15 V, Iout = 500 mA)
(1.35 V Vin – Vout 10 V, Iout = 800 mA)
for Adjustable Voltage
Line Regulation Regline 0.3 %
(Iout = 10 mA, Vin = [Vout + 1.5 V] to Vin = 20 V, TJ = 25°C)
Load Regulation (Vin = Vout + 3.0 V, Iout = 10 mA to 800 mA, TJ = 25°C) Regload 0.5 %
Dropout Voltage Vin –V
out V
(Iout = 500 mA) 1.0 1.25
(Iout = 800 mA) 1.1 1.35
Ripple Rejection RR 55 dB
(10 Vpp, 120 Hz Sinewave; Iout = 500 mA)
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
mA
1. The MC33269–12, Vin – Vout is limited to 8.0 V maximum, because of the 20 V maximum rating applied to Vin.
MC33269
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ELECTRICAL CHARACTERISTICS (CO = 10 µF, TA = 25°C, for min/max values TJ = –40°C to +125°C, unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
Minimum Required Load Current ILoad mA
Fixed Output Voltage 0
Adjustable Voltage 8.0
Adjustment Pin Current IAdj 120 µA
Vin
Vout
VAdj Gnd
Trim Links
Internal Schematic
This device contains 38 active transistors.
MC33269
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4
IO, OUTPUT LOAD CURRENT (mA)
in
V
out
–V
Figure 1. Dropout Voltage versus
Output Load Current
1.5
1.3
1.1
0.9
0.7
0.5 0 200 400 600 800 1000
Figure 2. Transient Load Regulation
,
DR
O
P
O
U
T
VOLTAG
E
(V)
20 ms/DIV
Cin = 10 µF
CO = 10 µF Tantalum
Vin = VO + 3.0 V
Preload = 0.1 A
0 A
0.5 A
100
, OUTPUTIOVO, OUTPUT
VOLT AGE DEVIATIONCURRENT
TA = 25°CTA = –40°C
TA = 125°C
mV/Div
–55
900 –25 0 25 50 75 100 125
940
980
1020
1060
1100
Figure 3. Dropout Voltage
versus Temperature Figure 4. MC33269–XX Output DC Current versus
Input–Output Differential Voltage
V
TA, AMBIENT TEMPERA TURE (°C)
IO = 800 mA
,
OV
ER
VOLTAG
E
IN
PU
T
T
HRESH
OL
D
(
%
V
)
FB(OV) FB
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
02.0 4.0 6.0 8.0 10 12 14 16
INPUT–OUTPUT VOLT AGE DIFFERENTIAL (V)
TA = 25°C
MC33269D–XX
L = 25 mm Copper
OUTPUT CURRENT (A)
70
0.1 1.0 10 100
60
50
40
30
20
Figure 5. MC33269 Ripple Rejection
versus Frequency Figure 6. MC33269–ADJ Ripple Rejection
versus Frequency
RR
,
R
I
PP
L
E REJE
CTION
R
ATIO
(d
B
)
f, FREQUENCY (kHz)
20
30
40
50
60
70
RR, RIPPLE REJECTION RATIO (dB)
100101.0f, FREQUENCY (kHz)
Vin = 8.0 V
Vout = 5.0 V
IL = 800 mA
CAdj = 22 µF
TA = 25°C
0.1
Vin = VO + 3.0 V
IL = 800 mA
TA = 25°C
VO = 12 V
VO = 3.3 V or 5.0 V
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ÏÏÏ
ÏÏÏ
ÏÏÏ
R , THERMAL RESISTANCE
JAθ
JUNCTION-TO-AIR ( C/W)°
40
80
120
160
200
240
280
0.35
0.42
0.50
0.63
0.83
1.25
2.50
010203025155.0
L, LENGTH OF COPPER (mm)
PD(max) for TA = 50°C
Minimum
Size Pad
PD
L
L
, MAXIMUM POWER DISSIPA TION (W)
Free Air
Mounted
Vertically
RθJA
2.0 oz. Copper
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
Figure 7. SOP–8 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
R
,
T
HERM
AL
RES
I
S
TANC
E
,
JAθJU
NCTION–TO–AI
R
(
C/
W
)
°
RθJA
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
ÏÏÏ
2.0 oz.
Copper
Graph represents symmetrical layout
3.0 mmL
L
PD(max) for TA = 50°C
30
50
70
90
110
130
150
170
L, LENGTH OF COPPER (mm)
02030504010 0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
R , THERMAL RESISTANCE,
JAθJUNCTION–TO–AIR ( C/W)°
Figure 8. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
L
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
ÏÏÏÏ
2.0 oz. Copper
RθJA
Minimum
Size Pad
Free Air
Mounted
Vertically
PD(max) for TA = 50°C
L
40
50
60
70
80
90
100
010203025155.0
L, LENGTH OF COPPER (mm)
0
0.4
0.8
1.2
1.6
2.0
2.4
Figure 9. SOT–223 Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
MC33269
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6
APPLICATIONS INFORMATION
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 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 but
greater than 0.2 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.
Also capacitance and ESR of a solid tantalum capacitor is
more stable over temperature. The use of a low ESR ceramic
capacitor placed within close proximity to the output of the
device could cause instability.
** An input bypass capacitor is recommended to improve
transient response or if the regulator is connected to the
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 regulators 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.
Figure 10. Typical Fixed Output Application
MC33269–XX
Vin Vout
Gnd
Co
10 µF
An input capacitor is not necessary for stability, however
it will improve the overall performance.
Figure 11. Typical Adjustable Output Application
MC33269
Vin Vout
Adj Co
10 µF
CAdj***
R1
R2
***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.
Figure 12. Current Regulator
MC33269
Vin Iout
Adj
RS
Iout
+
Figure 13. Battery Backed–Up Power Supply
MC33269–XX
Vin Vout
MC33269–XX
Gnd
Co
10 µF
Figure 14. Digitally Controlled Voltage Regulator
MC33269
Vin Vout
Adj Co
10 µF
R1
R2
R2 sets the maximum output voltage. Each transistor
reduces the output voltage when turned on.
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.
Vout
+
1.25
ǒ
1
)
R2
R1
Ǔ)
IAdj R2
1.25
RS
Cin Cin
Cin Co
10 µF
Cin
Cin
Gnd Cin
**
**
**
**
**
**
*
*
*
*
*
MC33269
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7
ORDERING INFORMATION
Device Package Shipping Information
MC33269D SO–8 98 Units / Rail
MC33269DR2 SO–8 2500 Units / Tape & Reel
MC33269DT DPAK 75 Units / Rail
MC33269DTRK DPAK 2500 Units / Tape & Reel
MC33269T TO–220 50 Units / Rail
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
MC33269T–12 T O–220 50 Units / Rail
MC33269
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8
PACKAGE DIMENSIONS
SOP–8
D SUFFIX
CASE 751–06
ISSUE T
DPAK
DT SUFFIX
CASE 369A–13
ISSUE Z
SEATING
PLANE
14
58
A0.25 MCBSS
0.25 MBM
h
q
C
X 45
_
L
DIM MIN MAX
MILLIMETERS
A1.35 1.75
A1 0.10 0.25
B0.35 0.49
C0.19 0.25
D4.80 5.00
E1.27 BSCe3.80 4.00
H5.80 6.20
h
0 7
L0.40 1.25
q
0.25 0.50
__
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.
D
EH
A
Be
B
A1
CA
0.10
D
A
K
B
R
V
S
FL
G
2 PL
M
0.13 (0.005) T
E
C
U
J
H
–T– SEATING
PLANE
Z
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.235 0.250 5.97 6.35
B0.250 0.265 6.35 6.73
C0.086 0.094 2.19 2.38
D0.027 0.035 0.69 0.88
E0.033 0.040 0.84 1.01
F0.037 0.047 0.94 1.19
G0.180 BSC 4.58 BSC
H0.034 0.040 0.87 1.01
J0.018 0.023 0.46 0.58
K0.102 0.114 2.60 2.89
L0.090 BSC 2.29 BSC
R0.175 0.215 4.45 5.46
S0.020 0.050 0.51 1.27
U0.020 ––– 0.51 –––
V0.030 0.050 0.77 1.27
Z0.138 ––– 3.51 –––
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
123
4
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PACKAGE DIMENSIONS
SOT–223
ST SUFFIX
CASE 318E–04
ISSUE K
TO–220AB
T SUFFIX
CASE 221A–09
ISSUE AA
H
S
F
A
B
D
G
L
4
123
0.08 (0003) C
MK
J
DIM
AMIN MAX MIN MAX
MILLIMETERS
0.249 0.263 6.30 6.70
INCHES
B0.130 0.145 3.30 3.70
C0.060 0.068 1.50 1.75
D0.024 0.035 0.60 0.89
F0.115 0.126 2.90 3.20
G0.087 0.094 2.20 2.40
H0.0008 0.0040 0.020 0.100
J0.009 0.014 0.24 0.35
K0.060 0.078 1.50 2.00
L0.033 0.041 0.85 1.05
M0 10 0 10
S0.264 0.287 6.70 7.30
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
____
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.
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.570 0.620 14.48 15.75
B0.380 0.405 9.66 10.28
C0.160 0.190 4.07 4.82
D0.025 0.035 0.64 0.88
F0.142 0.147 3.61 3.73
G0.095 0.105 2.42 2.66
H0.110 0.155 2.80 3.93
J0.018 0.025 0.46 0.64
K0.500 0.562 12.70 14.27
L0.045 0.060 1.15 1.52
N0.190 0.210 4.83 5.33
Q0.100 0.120 2.54 3.04
R0.080 0.110 2.04 2.79
S0.045 0.055 1.15 1.39
T0.235 0.255 5.97 6.47
U0.000 0.050 0.00 1.27
V0.045 ––– 1.15 –––
Z––– 0.080 ––– 2.04
B
Q
H
Z
L
V
G
N
A
K
F
123
4
D
SEATING
PLANE
–T–
C
S
T
U
R
J
MC33269
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10
Notes
MC33269
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11
Notes
MC33269
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12
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without further notice to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular
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MC33269/D
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