Housed in a SOT23–L package, the MC33263 delivers up to
150 mA where it exhibits a typical 180 mV dropout. With an
incredible noise level of 25 mVRMS (over 100 Hz to 100 kHz, with a
10 nF bypass capacitor), the MC33263 represents the ideal choice for
sensitive circuits, especially in portable applications where noise
performance and space are premium. The MC33263 also excels in
response time and reacts in less than 25 ms when receiving an OFF to
ON signal (with no bypass capacitor).
Thanks to a novel concept, the MC33263 accepts output capacitors
without any restrictions regarding their Equivalent Series Resistance
(ESR) thus offering an obvious versatility for immediate implementation.
With a typical DC ripple rejection better than –90 dB (–70 dB @
1 kHz), it naturally shields the downstream electronics against choppy
power lines.
Additionally, thermal shutdown and short–circuit protection
provide the final product with a high degree of ruggedness.
Features:
• Very Low Quiescent Current 170 µA (ON, no load), 100 nA (OFF,
no load)
• Very Low Dropout Voltage, typical value is 137 mV at an output
current of 100 mA
• Very Low Noise with external bypass capacitor (10 nF),
typically 25 µV rms over 100 Hz to 100 kHz
• Internal Thermal Shutdown
• Extremely Tight Line Regulation typically –90 dB
• Ripple Rejection –70 dB @ 1 kHz
• Line Transient Response: 1 mV for
• Extremely Tight Load Regulation, typically 20 mV at
• Multiple Output Voltages Available
• Logic Level ON/OFF Control (TTL–CMOS Compatible)
• ESR can vary from 0 to 3
W
• Functionally and Pin Compatible with TK112xxA/B Series
Applications:
• All Portable Systems, Battery Powered Systems, Cellular
T elephones, Radio Control Systems, Toys and Low Voltage Systems
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature Range
2.8 V
3.0 V
3.2 V
3.3 V
3.8 V
4.0 V
4.75 V
5.0 V
Location Code
Wafer Lot Traceability
V
in
D
R
q
JA
R
q
JC
T
A
T
Jmax
T
stg
Pin 1 Ink
Mark Identifier
Solid Pin 1 Dot
or Dimple
6
65 4
or
XALYW
12 3
SOT–23L
12
InternallyW
210°C/W
–40 to +85
150
–60 to +150
V
°C/W
°C
°C
°C
ELECTRICAL CHARACTERISTICS (For typical values T
Characteristics
= 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 150°C)
A
SymbolPin #MinTypMaxUnit
CONTROL ELECTRICAL CHARACTERISTICS
Input Voltage RangeV
ON/OFF Input Current (All versions)
V
ON/OFF
= 2.4 V–2.5–
ON/OFF Input Voltages (All versions)
ON/OFF
I
ON/OFF
V
ON/OFF
Logic “0”, i.e. OFF State––0.3
Logic “1”, i.e. ON State2.2––
10–V
1
1
CURRENTS PARAMETERS
Current Consumption in OFF State (All versions)
OFF Mode Current: Vin = V
+ 1.0 V, I
out
= 0 mA–0.12.0
out
Current Consumption in ON State (All versions)
ON Mode Sat Current: Vin = V
+ 1.0 V, I
out
= 0 mA–170200
out
Current Consumption in Saturation ON State (All versions)
ON Mode Sat Current: Vin = V
Current Limit Vin = V
+ 1.0 V, (All versions)
out
– 0.5 V, I
out
= 0 mA–9001400
out
Output Short–circuited (Note 1.)175210–
1. I
(Output Current) is the measured current when the output voltage drops below 0.3 V with respect to V
out
IQ
IQ
IQ
I
MAX
OFF
ON
SAT
out
at I
= 30 mA.
out
in
V
m
A
V
m
A
m
A
m
A
mA
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MC33263
ELECTRICAL CHARACTERISTICS (For typical values T
Characteristics
Vin = V
2.8 Suffix2.742.82.86
3.0 Suffix2.943.03.06
3.2 Suffix3.133.23.27
3.3 Suffix3.233.33.37
3.8 Suffix3.723.83.88
4.0 Suffix3.924.04.08
4.75 Suffix4.664.754.85
5.0 Suffix4.905.05.1
Vin = V
1.0 mA < I
2.8 Suffix2.72.82.9
3.0 Suffix2.93.03.1
3.2 Suffix3.093.23.31
3.3 Suffix3.183.33.42
3.8 Suffix3.673.83.93
4.0 Suffix3.864.04.14
4.75 Suffix4.584.754.92
5.0 Suffix4.835.05.17
+ 1.0 V, TA = 25°C, 1.0 mA < I
out
+ 1.0 V, –40°C < TA < 80°C,V
out
< 150 mA
out
< 150 mA
out
= 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 150°C)
A
SymbolPin #MinTypMaxUnit
V
out
out
4
4V
LINE AND LOAD REGULATION, DROPOUT VOLTAGES
Line Regulation (All versions)
V
+ 1.0 V < Vin < 12 V, I
out
Load Regulation (All versions) Vin = V
Dropout Voltage (All versions)
= 60 mA–2.010
out
I
= 1.0 to 60 mA
out
I
= 1.0 to 100 mA
out
I
= 1.0 to 150 mA
out
I
= 10 mA–3090
out
I
= 100 mA–137230
out
I
= 150 mA–180260
out
out
+ 1.0 V
Reg
Reg
Vin – V
line
load
out
4/6
1
4, 6
–
–
–
8.0
15
20
DYNAMIC PARAMETERS
Ripple Rejection (All versions)
Vin = V
Line Transient Response
Vin = V
d(Vin)/dt = 15 mV/ms
Output Noise Voltage (All versions)
C
out
Output Noise Density
C
out
Output Rise Time (All versions)
C
out
1% of ON/OFF Signal to 99% of Nominal Output Voltage
+ 1.0 V, Vpp = 1.0 V, f = 1.0 kHz, I
out
+ 1.0 V to V
out
= 1.0 µF, I
= 1.0 µF, I
= 1.0 µF, I
out
out
out
+ 4.0 V, I
out
= 60 mA, f = 100 Hz to 100 kHz
= 60 mA, f = 1.0 kHz–230–
= 30 mA, V
ON/OFF
= 60 mA6070–
out
= 60 mA,–1.0–
out
C
C
C
Without Bypass Capacitor–40–µs
With C
= 10 nF–25–
bypass
= 1.0 nF–40–
bypass
= 0 nF–65–
bypass
= 0 to 2.4 V
= 10 nF–1.1–ms
bypass
V
RMS
V
N
t
r
4, 6
4, 6
4, 6
4
4
THERMAL SHUTDOWN
Thermal Shutdown (All versions)
–
150
25
35
45
V
mV
mV
mV
dB
mV
µVrms
nV/ √Hz
–
°C
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MC33263
DEFINITIONS
Load Regulation – The change in output voltage for a
change in load current at constant chip temperature.
Dropout V oltage – The input/output differential at which
the regulator output no longer maintains regulation against
further reductions in input voltage. Measured when the
output drops 100 mV below its nominal value (which is
measured at 1.0 V differential), dropout voltage is affected
by junction temperature, load current and minimum input
supply requirements.
Output Noise Voltage – The RMS AC voltage at the
output with a constant load and no input ripple, measured
over a specified frequency range.
Maximum Power Dissipation – The maximum total
dissipation for which the regulator will operate within
specifications.
Quiescent Current – Current which is used to operate the
regulator chip and is not delivered to the load.
Line Regulation – The change in input voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques
such that the average chip temperature is not significantly
affected.
Line Transient Response – Typical over– and
undershoot response when input voltage is excited with a
given slope.
Thermal Protection – Internal thermal shutdown
circuitry is provided to protect the integrated circuit in the
event that the maximum junction temperature is exceeded.
When activated, typically 150°C, the regulator turns off.
This feature is provided to prevent catastrophic failures from
accidental overheating.
Maximum Package Power Dissipation – The maximum
package power dissipation is the power dissipation level at
which the junction temperature reaches its maximum value
i.e. 125°C. The junction temperature is rising while the
difference between the input power (VCC X ICC) and the
output power (V
out
X I
out
) is increasing.
Depending on ambient temperature, it is possible to
calculate the maximum power dissipation, maximum load
current or maximum input voltage (see Application Hints:
Protection).
The maximum power dissipation supported by the device
is a lot increased when using appropriate application design.
Mounting pad configuration on the PCB, the board material
and also the ambient temperature are affected the rate of
temperature rise. It means that when the IC has good thermal
conductivity through PCB, the junction temperature will be
“low” even if the power dissipation is great.
The thermal resistance of the whole circuit can be
evaluated by deliberately activating the thermal shutdown
of the circuit (by increasing the output current or raising the
input voltage for example).
Then you can calculate the power dissipation by
subtracting the output power from the input power. All
variables are then well known: power dissipation, thermal
shutdown temperature (150°C for MC33263) and ambient
temperature.
APPLICATION HINTS
Input Decoupling – As with any regulator, it is necessary
to reduce the dynamic impedance of the supply rail that
feeds the component. A 1 mF capacitor either ceramic or
tantalum is recommended and should be connected close to
the MC33263 package. Higher values will correspondingly
improve the overall line transient response.
Output Decoupling – Thanks to a novel concept, the
MC33263 is a stable component and does not require any
Equivalent Series Resistance (ESR) neither a minimum
output current. Capacitors exhibiting ESRs ranging from a
few mW up to 3W can thus safely be used. The minimum
decoupling value is 1 mF and can be augmented to fulfill
stringent load transient requirements. The regulator accepts
ceramic chip capacitors as well as tantalum devices.
Noise Performances – Unlike other LDOs, the MC33263
is a true low–noise regulator. W ith a 10 nF bypass capacitor ,
it typically reaches the incredible level of 25 mVRMS overall
noise between 100 Hz and 100 kHz. To give maximum
insight on noise specifications, ON Semiconductor includes
spectral density graphics as well as noise dependency versus
bypass capacitor .
The bypass capacitor impacts the start–up phase of the
MC33263 as depicted by the data–sheet curves. A typical
1 ms settling time is achieved with a 10 nF bypass capacitor.
However, thanks to its low–noise architecture, the
MC33263 can operate without bypass and thus offers a
typical 20 ms start–up phase. In that case, the typical output
noise stays lower than 65 mVRMS between 100 Hz –
100 kHz.
Protections – The MC33263 hosts several protections,
conferring natural ruggedness and reliability to the products
implementing the component. The output current is
internally limited to a minimum of 175 mA while
temperature shutdown occurs if the die heats up beyond
150°C. These value lets you assess the maximum
differential voltage the device can sustain at a given output
current before its protections come into play.
The maximum dissipation the package can handle is given
by:
T
P
max
Jmax–TA
+
R
q
JA
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Page 5
MC33263
Inp
Outp
Diff
–
)
If T
is internally limited to 150°C, then the MC33263
Jmax
can dissipate up to 595 mW @ 25°C.
The power dissipated by the MC33263 can be calculated
from the following formula:
Ptot
+ǀVin@
I
gnd
(I
)
ǁ)ǀ
Vin*
V
ǁ@
out
out
I
out
or
Vin
max
Ptot)V
+
I
gnd
out
)
I
@
out
I
out
If a 150 mA output current is needed, the ground current
is extracted from the data–sheet curves: 6.5 mA @ 150 mA.
For a MC33263NW28R2 (2.8 V), the maximum input
voltage will then be 6.48 V, a rather comfortable margin.
T ypical Application – The following figure portraits the
typical application for the MC33263 where both
input/output decoupling capacitors appear.
ut
654
ut
Figure 2. Printed Circuit Board
erential (V
V
in
out
C3
1.0 mF
On/Off
Figure 1. A T ypical MC33263 Application with
Recommended Capacitor Values
MC33263
123
C1
10 nF
C2
1.0 mF
As for any low noise designs, particular care has to be
taken when tackling Printed Circuit Board (PCB) layout.
The following figure gives an example of a layout where
stray inductances/capacitances are minimized.
MC33263
InputOutput
Figure 3. Copper Side Component Layout
C3
++
Rpull–up
ON/OFF
C2
C1
This layout is the basis for an MC33263 performance
evaluation board where the BNC connectors give the user an
easy and quick evaluation mean.
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MC33263
MC33263 Wake–up Improvement – In portable
applications, an immediate response to an enable signal is
vital. If noise is not of concern, the MC33263 without a
bypass capacitor settles in nearly 20 ms and typically delivers
65 mVRMS between 100 Hz and 100 kHz.
In ultra low–noise systems, the designer needs a 10 nF
bypass capacitor to decrease the noise down to 25 mVRMS
between 100 Hz and 100 kHz. With the adjunction of the
10 nF capacitor, the wake–up time expands up to 1 ms as
shown on the data–sheet curves. If an immediate response
is wanted, following figure’s circuit gives a solution to
charge the bypass capacitor with the enable signal without
degrading the noise response of the MC33263.
At power–on, C4 is discharged. When the control logic
sends its wake–up signal by going to a high level, the PNP
base is momentarily tight to ground. The PNP switch closes
and immediately charges the bypass capacitor C1 toward its
operating value. After a few ms, the PNP opens and becomes
totally transparent to the regulator.
This circuit improves the response time of the regulator
which drops from 1 ms down to 30 ms. The value of C4 needs
to be tweaked in order to avoid any bypass capacitor
overload during the wake–up transient.
InputOutput
654
++
C3
1.0 mF
On/Off
R2
220 k
C4
470 pF
MC33263
123
MMBT2902LT1
Q1
C1
10 nF
C2
1.0 mF
Figure 4. A PNP Transistor Drives the
Bypass Pin when Enable Goes High
MC33263 Without
Wake–up Improvement
(Typical Response)
1 ms
MC33263 With
Wake–up Improvement
(Typical Response)
30 ms
Figure 5. MC33263 Wake–up Improvement with Small PNP Transistor
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MC33263
The PNP being wired upon the bypass pin, it shall not
degrade the noise response of the MC33263. Figure 6
confirms the good behavior of the integrated circuit in this
350
300
250
200
C
= 10 nF
150
nV/sqrt (Hz)
100
50
byp
Vin = 26 mVrms C = 10 nF
@ 100 Hz – 100 kHz
0
1001,000
Figure 6. Noise Density of the MC33263 with a
10 nF Bypass Capacitor and a Wake–up
Improvement Network
area which reaches a typical noise level of 26 mVRMS
(100 Hz to 100 kHz) at I
10,000
Frequency (Hz)
Vin = 3.8 V
V
= 2.8 V
out
Co = 1.0 mF
I
= 60 mA
out
T
amb
100,000
= 25°C
out
1,000,000
= 60 mA.
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MC33263
TYPICAL PERFORMANCE CHARACTERISTICS
Ground Current Performances
7.0
Vin = 3.8 V
6.0
V
= 2.8 V
out
CO = 1.0 mF
5.0
T
= 25°C
amb
4.0
3.0
2.0
GROUND CURRENT (mA)
1.0
0
0
2040100–20020406080
6080120 140200160 180
OUTPUT CURRENT (mA)
Figure 7. Ground Current versus Output Current
Line Transient Response and Output Voltage
200
m
190
180
170
160
150
140
130
120
110
QUIESCENT CURRENT ON MODE ( A)
100
–40
–20
020406010080
TEMPERATURE (°C)
GROUND CURRENT (mA)
2.1
2.05
2.0
1.95
1.9
1.85
1.8
–40
AMBIENT TEMPERATURE (°C)
Figure 8. Ground Current versus Ambient
Temperature
Vin = 3.8 to 7.0 V
Y1 = 1.0 mV/div
Y2 = 1.0 V/div
X = 1.0 ms
I
= 60 mA
out
T
= 25°C
amb
dVin = 3.2 V
Vin = 3.8 V
V
= 2.8 V
out
CO = 1.0 mF
I
= 60 mA
out
Y1
Y2
Figure 9. Quiescent Current versus T emperatureFigure 10. Line Transient Response
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Vin = 3.8 V
Y1 = 100 mV/div
Y2 = 20 mV/div
X = 200 ms/div
T
= 25°C
amb
MC33263
TYPICAL PERFORMANCE CHARACTERISTICS
Load Transient Response versus Load Current Slope
Y2
Vin = 3.8 V
Y1 = 50 mA/div
Y2 = 20 mV/div
X = 20 ms
T
Figure 23. Output V oltage versus TemperatureFigure 24. Output V oltage versus I
10 mA
60 mA
100 mA
150 mA
406080
25°C
85°C
out
100
–40°C
140
Ripple Rejection Performances
0
–10
Vin = 3.8 V
V
= 2.8 V
CO = 1.0 mF
I
T
100
out
= 60 mA
out
amb
= 25°C
1000100,000
FREQUENCY (Hz)
10,000
(dB)
–20
–30
–40
–50
–60
–70
–80
–90
–100
Figure 25. Ripple Rejection versus Frequency with
10 nF Bypass Capacitor
0
–20
–40
–60
(dB)
–80
–100
–120
10
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11
Vin = 3.8 V
V
= 2.8 V
out
CO = 1.0 mF
I
= 60 mA
out
T
= 25°C
amb
100
1000100,000
FREQUENCY (Hz)
10,000
1,000,000
Figure 26. Ripple Rejection versus Frequency
without Bypass Capacitor
Page 12
PIN 1 IDENTIFIER
IN THIS ZONE
D
A
MC33263
P ACKAGE DIMENSIONS
SOT–23L
NW SUFFIX
CASE 318J–01
ISSUE B
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
0.05
E
M
0.20C
M
B
C
S
B
E1
A
6
e
5
A
4
e1
B
1
2
3
A1
A
S
A
M
b
0.10C
(b)
q
c1
H
L
c
b1
SECTION A–A
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
3. DIMENSION E1 DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.23 PER
SIDE.
4. DIMENSIONS b AND b2 DO NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 TOTAL IN EXCESS
OF THE b AND b2 DIMENSIONS AT MAXIMUM
MATERIAL CONDITION.
5. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
6. DIMENSIONS D AND E1 ARE TO BE DETERMINED
AT DATUM PLANE H.
MILLIMETERS
DIM MINMAX
A1.251.40
A10.000.10
b0.350.50
b10.350.45
c0.10
c10.10
D3.20
E3.003.60
E12.002.40
e
e1
L0.25
q
0.25
0.20
3.60
0.95
1.90
0.55
0 10
__
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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alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer .
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MC33263/D
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