MC33263
Ultra Low Noise
150 mA Low Dropout
Voltage Regulator with
ON/OFF Control
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
m
VRMS (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
m
s 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:
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MARKING
DIAGRAMS
6
SOT–23L
NW SUFFIX
CASE 318J
1
x
= Voltage Option Code
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
xAYLW
6
1
•
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
µVrms
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
D
Vin = 3 V
Extremely Tight Load Regulation, typically 20 mV at
D
Iout = 150 mA
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
Telephones, Radio Control Systems, Toys and Low Voltage Systems
MC33263 Block Diagram
6
Input
Shutdown
1
ON/OFF
Thermal
Shutdown
4
Output
PIN CONNECTIONS
ON/OFF 1
GND 2
BYPASS 3
(Top View)
6 VIN
5 GND
4 VOUT
ORDERING INFORMATION
Device
MC33263NW–28R2
MC33263NW–30R2
MC33263NW–32R2
MC33263NW–33R2
MC33263NW–38R2
MC33263NW–40R2
MC33263NW–47R2
MC33263NW–50R2
Version
2.8 V
3.0 V
3.2 V
3.3 V
3.8 V
4.0 V
4.75 V
5.0 V
Shipping
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
Applications:
•
All Portable Systems, Battery Powered Systems, Cellular
3
Bypass
Band Gap
Reference
All Devices Available in SOT–23L 6 Lead Package
2
GND
* Current Limit
* Antisaturation
*
Protection
5
GND
©
Semiconductor Components Industries, LLC, 2000
1
April, 2000 – Rev. 2
Publication Order Number:
MC33263/D
MC33263
DEVICE MARKING
XALYW
1st Digit
Marking
A
B
Version
2.8 V
3.0 V
3.2 V
3.3 V
3.8 V
4.0 V
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Á
C
D
E
F
G
H
A
L
4.75 V
5.0 V
2nd Digit
3rd Digit
Location Code
Wafer Lot Traceability
Date Code
4th/5th Digits
YW
6
Pin 1 Ink
Mark Identifier
or
Solid Pin 1 Dot
or Dimple
1
5
4
XALYW
2
SOT–23L
3
MAXIMUM RATINGS
Rating
Symbol
Vin
PD
Pin #
6
Value
12
Unit
V
Power Supply Voltage
Power Dissipation and Thermal Resistance
Maximum Power Dissipation
NW Suffix, Plastic Package
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature Range
R
q
JA
R
q
JC
Internally
Limited
210
W
°C/W
°C/W
°C
°C
°C
TA
TJmax
Tstg
–40 to +85
150
–60 to +150
ELECTRICAL CHARACTERISTICS
(For typical values TA = 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 150°C)
Characteristics
Symbol
Pin #
Min
Typ
Max
Unit
CONTROL ELECTRICAL CHARACTERISTICS
Input Voltage Range
VON/OFF
ION/OFF
1
1
1
0
–
–
Vin
–
V
ON/OFF Input Current (All versions)
VON/OFF = 2.4 V
m
A
V
2.5
–
–
ON/OFF Input Voltages (All versions)
Logic “0”, i.e. OFF State
Logic “1”, i.e. ON State
VON/OFF
–
2.2
0.3
–
CURRENTS PARAMETERS
Current Consumption in OFF State (All versions)
OFF Mode Current: Vin = Vout + 1.0 V, Iout = 0 mA
IQOFF
IQON
m
A
m
A
m
A
–
–
–
0.1
2.0
Current Consumption in ON State (All versions)
ON Mode Sat Current: Vin = Vout + 1.0 V, Iout = 0 mA
170
900
210
200
Current Consumption in Saturation ON State (All versions)
ON Mode Sat Current: Vin = Vout – 0.5 V, Iout = 0 mA
Current Limit Vin = Vout + 1.0 V, (All versions)
Output Short–circuited (Note 1.)
IQSAT
IMAX
1400
–
mA
175
1. Iout (Output Current) is the measured current when the output voltage drops below 0.3 V with respect to Vout at Iout = 30 mA.
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2
MC33263
ELECTRICAL CHARACTERISTICS
(For typical values TA = 25°C, for min/max values TA = –40°C to +85°C, Max TJ = 150°C)
Characteristics
Vin = Vout + 1.0 V, TA = 25°C, 1.0 mA < Iout < 150 mA
2.8 Suffix
3.0 Suffix
3.2 Suffix
3.3 Suffix
3.8 Suffix
4.0 Suffix
4.75 Suffix
5.0 Suffix
Vin = Vout + 1.0 V, –40°C < TA < 80°C,
1.0 mA < Iout < 150 mA
2.8 Suffix
3.0 Suffix
3.2 Suffix
3.3 Suffix
3.8 Suffix
4.0 Suffix
4.75 Suffix
5.0 Suffix
Symbol
Vout
Pin #
4
Min
2.74
2.94
3.13
3.23
3.72
3.92
4.66
4.90
Typ
2.8
3.0
3.2
3.3
3.8
4.0
4.75
5.0
Max
2.86
3.06
3.27
3.37
3.88
4.08
4.85
5.1
Unit
V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
Vout
4
2.7
2.9
3.09
3.18
3.67
3.86
4.58
4.83
2.8
3.0
3.2
3.3
3.8
4.0
4.75
5.0
2.9
3.1
3.31
3.42
3.93
4.14
4.92
5.17
V
ÁÁÁ Á Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ Á Á Á Á Á
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁ Á Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁ Á Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁ Á Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁ Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
LINE AND LOAD REGULATION, DROPOUT VOLTAGES
Line Regulation (All versions)
Vout + 1.0 V < Vin < 12 V, Iout = 60 mA
Load Regulation (All versions)
Regline
4/6
1
mV
mV
–
–
–
–
–
–
–
2.0
8.0
15
20
10
25
35
45
Vin = Vout + 1.0 V
Iout = 1.0 to 60 mA
Iout = 1.0 to 100 mA
Iout = 1.0 to 150 mA
Iout = 10 mA
Iout = 100 mA
Iout = 150 mA
Regload
Dropout Voltage (All versions)
Vin – Vout
4, 6
mV
30
137
180
90
230
260
DYNAMIC PARAMETERS
Ripple Rejection (All versions)
Vin = Vout + 1.0 V, Vpp = 1.0 V, f = 1.0 kHz, Iout = 60 mA
Line Transient Response
Vin = Vout + 1.0 V to Vout + 4.0 V, Iout = 60 mA,
d(Vin)/dt = 15 mV/
m
s
4, 6
4, 6
dB
60
–
70
–
–
mV
1.0
Output Noise Voltage (All versions)
Cout = 1.0
µF,
Iout = 60 mA, f = 100 Hz to 100 kHz
Cbypass = 10 nF
Cbypass = 1.0 nF
Cbypass = 0 nF
Output Noise Density
Cout = 1.0
µF,
Iout = 60 mA, f = 1.0 kHz
VRMS
4, 6
µVrms
–
–
–
–
25
40
65
–
–
–
–
VN
tr
4
4
nV/
√Hz
230
Output Rise Time (All versions)
Cout = 1.0
µF,
Iout = 30 mA, VON/OFF = 0 to 2.4 V
1% of ON/OFF Signal to 99% of Nominal Output Voltage
Without Bypass Capacitor
With Cbypass = 10 nF
–
–
40
1.1
–
–
µs
ms
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á Á Á
Thermal Shutdown (All versions)
–
150
–
°C
THERMAL SHUTDOWN
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3
MC33263
DEFINITIONS
Load Regulation
– The change in output voltage for a
change in load current at constant chip temperature.
Dropout Voltage
– 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 (Vout X Iout) 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
m
F 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 m
W
up to 3
W
can thus safely be used. The minimum
decoupling value is 1
m
F 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. With a 10 nF bypass capacitor,
it typically reaches the incredible level of 25
m
VRMS 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
m
s start–up phase. In that case, the typical output
noise stays lower than 65
m
VRMS 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:
P max
+
TJmax – TA
R
q
JA
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4
MC33263
If TJmax is internally limited to 150°C, then the MC33263
can dissipate up to 595 mW @ 25°C.
The power dissipated by the MC33263 can be calculated
from the following formula:
Ptot
+
V
in
@
Ignd(Iout)
)
Vin
*
Vout
@
Iout
gnd
out
or
Vin max
out
+
PtotI
)
V
)
I
@
Iout
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.
Typical Application
– The following figure portraits the
typical application for the MC33263 where both
input/output decoupling capacitors appear.
Figure 2. Printed Circuit Board
Input
Output
Differential (Vin–Vout)
6
C3
1.0
m
F
1
On/Off
5
4
C2
1.0
m
F
Input
3
C1
10 nF
Rpull–up
C1
MC33263
C3
+
MC33263
+
C2
Output
2
Figure 1. A Typical MC33263 Application with
Recommended Capacitor Values
ON/OFF
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.
Figure 3. Copper Side Component Layout
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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5
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