Order this document by MC33264/D
MC33264
Micropower smallCAP
™
LOW DROPOUT
MICROPOWER VOLTAGE
REGULATORS WITH
ON/OFF CONTROL
SEMICONDUCTOR
TECHNICAL DATA
Voltage Regulators with
On/Off Control
The MC33264 series are micropower low dropout voltage regulators
available in SO–8 and Micro–8 surface mount packages and a wide range of
output voltages. These devices feature a very low quiescent current (100
µA
in the ON mode; 0.1
µA
in the OFF mode), and are capable of supplying
output currents up to 100 mA. Internal current and thermal limiting protection
is provided. They require only a small output capacitance for stability.
Additionally, the MC33264 has either active HIGH or active LOW control
(Pins 2 and 3) that allows a logic level signal to turn–off or turn–on the
regulator output.
Due to the low input–to–output voltage differential and bias current
specifications, these devices are ideally suited for battery powered
computer, consumer, and industrial equipment where an extension of useful
battery life is desirable.
MC33264 Features:
•
•
•
•
•
•
•
•
8
1
Low Quiescent Current (0.3
µA
in OFF Mode; 95
µA
in ON Mode)
Low Input–to–Output Voltage Differential of 47 mV at 10 mA, and
131 mV at 50 mA
Multiple Output Voltages Available
Extremely Tight Line and Load Regulation
Stable with Output Capacitance of Only
0.22
µF
for 4.0 V, 4.75 V and 5.0 V Output Voltages
0.33
µF
for 2.8 V, 3.0 V, 3.3 V and 3.8 V Output Voltages
Internal Current and Thermal Limiting
Logic Level ON/OFF Control
Functionally Equivalent to TK115XXMC and LP2980
8
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
1
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
PIN CONNECTIONS
Input
1
2
3
4
(Top View)
8 Output
7 Base
6 Gnd
5 Adjust
Representative Block Diagram
1
Vin
Thermal and
Anti–Sat
Protection
8
Vout
7
Base
Rint
On/Off
On/Off
N/C
2
On/Off
ORDERING INFORMATION
Device
MC33264D–2.8
MC33264D–3.0
MC33264D–3.3
MC33264D–3.8
MC33264D–4.0
MC33264D–4.75
MC33264D–5.0
MC33264DM–2.8
MC33264DM–3.0
MC33264DM–3.3
MC33264DM–3.8
MC33264DM–4.0
MC33264DM–4.75
MC33264DM–5.0
©
Motorola, Inc. 1998
Operating
Temperature Range Package
5
Adj
1.23 V
Vref
3
On/Off
This device contains 37 active transistors.
MC33264
52.5 k
6
Gnd
SO–8
TA = – 40° to +85°C
Micro–8
Rev 3
MOTOROLA ANALOG IC DEVICE DATA
1
MC33264
MAXIMUM RATINGS
(TC = 25°C, unless otherwise noted.)
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Á
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Á Á
Input Voltage
VCC
PD
13
Vdc
W
Rating
Symbol
Value
Unit
ÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
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Á
Á Á
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Á
Á Á
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Á
Á Á
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Á
Á Á
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Á
Á Á
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Á Á
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Á
Á Á
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á
Output Current
IO
100
mA
Maximum Adjustable Output Voltage
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature Range
VO
TJ
1.15 x Vnom
125
Vdc
°C
°C
°C
TA
–40 to +85
Tstg
–65 to +150
NOTE:
ESD data available upon request.
Power Dissipation and Thermal Characteristics
Maximum Power Dissipation
Case 751 (SO–8) D Suffix
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 846A (Micro–8) DM Suffix
Thermal Resistance, Junction–to–Ambient
Internally Limited
180
45
240
R
θJA
R
θJC
R
θJA
°C/W
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(Vin = 6.0 V, IO = 10 mA, CO = 1.0
µF,
TJ = 25°C (Note 1), unless otherwise noted.)
Characteristic
Output Voltage (IO = 0 mA)
2.8 Suffix (VCC = 3.8 V)
3.0 Suffix (VCC = 4.0 V)
3.3 Suffix (VCC = 4.3 V)
3.8 Suffix (VCC = 4.8 V)
4.0 Suffix (VCC = 5.0 V)
4.75 Suffix (VCC = 5.75 V)
5.0 Suffix (VCC = 6.0 V)
Vin = (VO + 1.0) V to 12 V, IO < 60 mA,TA= –40° to +85°C
2.8 Suffix
3.0 Suffix
3.3 Suffix
3.8 Suffix
4.0 Suffix
4.75 Suffix
5.0 Suffix
Line Regulation (Vin = [VO + 1.0] V to 12 V, IO = 60 mA)
All Suffixes
Load Regulation (Vin = [VO + 1.0], IO = 0 mA to 60 mA)
All Suffixes
Dropout Voltage
IO = 10 mA
IO = 50 mA
IO = 60 mA
Symbol
VO
Min
2.74
2.96
3.23
3.72
3.92
4.66
4.9
2.7
2.9
3.18
3.67
3.86
4.58
4.83
Regline
–
–
Typ
2.8
3.0
3.3
3.8
4.0
4.75
5.0
–
–
–
–
–
–
–
2.0
16
Max
2.86
3.04
3.37
3.88
4.08
4.85
5.1
2.9
3.1
3.42
3.93
4.14
4.92
5.17
10
25
mV
mV
mV
Unit
V
Regload
VI – VO
–
–
–
–
–
–
47
131
147
95
0.3
540
65
90
200
230
150
2.0
900
–
–
–
–
–
Quiescent Current
ON Mode (Vin = [VO + 1.0] V, IO = 0 mA)
OFF Mode
ON Mode (Vin = [VO + 0.5] V, IO = 0 mA) [Note2]
IQ
µA
Ripple Rejection (Vin peak–to–peak = [VO + 1.5] to [VO + 5.5]
V at f = 1.0 kHz)
Output Voltage Temperature Coefficient
–
55
–
dB
TC
±120
150
110
46
ppm/°C
mA
Current Limit (Vin = [VO + 1.0], VO Shorted)
ILimit
Vn
100
–
–
Output Noise Voltage (10 Hz to 100 kHz) (Note 3)
CL = 1.0
µF
CL = 100
µF
µVrms
NOTES:
1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. Quiescent current is measured where the PNP pass transistor is in saturation. VCE = –0.5 V guarantees this condition.
3. Noise tests on the MC33264 are made with a 0.01
µF
capacitor connected across Pins 8 and 5.
2
MOTOROLA ANALOG IC DEVICE DATA
MC33264
ELECTRICAL CHARACTERISTICS (continued)
(Vin = 6.0 V, IO = 10 mA, CO = 1.0
µF,
TJ = 25°C (Note 1), unless otherwise noted.)
Characteristic
ON/OFF INPUTS
Symbol
Min
Typ
Max
Unit
IQ, QUIESCENT CURRENT (mA)
1.0
TA = 25°C
MC33264D–5.0
VO, OUTPUT VOLTAGE (V)
ÁÁÁ Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á
ÁÁÁ Á Á Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á Á Á
On/Off Input (Pin 3 Tied to Ground)
Logic “1” (Regulator ON)
Logic “0” (Regulator OFF)
On/Off Input (Pin 2 Tied to Vin)
Logic “0” (Regulator ON)
Logic “1” (Regulator OFF)
VOn/Off
V
2.4
0
–
–
–
–
Vin
0.5
0
Vin – 0.2
–
–
Vin – 2.4
Vin
–
–
On/Off Pin Input Current (Pin 3 Tied to Ground)
VOn/Off= 2.4 V
On/Off Pin Input Current (Pin 2 Tied to Vin)
VOn/Off = Vin – 2.4 V
IOn/Off
µA
1.9
12
NOTES:
1. Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
2. Quiescent current is measured where the PNP pass transistor is in saturation. VCE = –0.5 V guarantees this condition.
3. Noise tests on the MC33264 are made with a 0.01
µF
capacitor connected across Pins 8 and 5.
DEFINITIONS
Dropout Voltage
– The input/output voltage 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.
Line Regulation
– The change in output voltage for a
change in input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques such
that average chip temperature is not significantly affected.
Load Regulation
– The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation
– The maximum total
device 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.
Output Noise Voltage
– The rms ac voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
Figure 1. Quiescent Current
versus Load Current
5.0
6.0
5.0
4.0
Figure 2. Output Voltage versus Input Voltage
TA = 25°C
MC33264D–5.0
RL = 5.0 k
3.0
2.0
1.0
0
0
RL = 100
Ω
0.10
0.03
0.1
1.0
10
100
1.0
2.0
3.0
4.0
5.0
6.0
Iload, LOAD CURRENT (mA)
Vin, INPUT VOLTAGE (V)
MOTOROLA ANALOG IC DEVICE DATA
3
MC33264
Figure 3. Input Current versus Input Voltage
1000
VO, OUTPUT VOLTAGE (V)
800
600
400
200
0
0
No Load
TA = 25°C
MC33264D–5.0
5.04
5.03
I , INPUT CURRENT (
µA)
in
5.02
5.01
5.00
4.99
4.98
4.97
2.0
4.0
6.0
8.0
10
12
4.96
–55
–25
0
25
50
75
100
125
IO = 10 mA
TA = 25°C
MC33264D–5.0
Figure 4. Output Voltage versus Temperature
Vin, INPUT VOLTAGE (V)
TA, AMBIENT TEMPERATURE (°C)
Figure 5. Dropout Voltage versus Output Current
240
V I – VO, DROPOUT VOLTAGE (mV)
200
160
120
80
40
0
0.3
RL = 40 to 50 k
CL = 1.0
µF
TA = 25°C
MC33264D–5.0
V I – VO, DROPOUT VOLTAGE (mV) RL= 100 to 500
Ω
Figure 6. Dropout Voltage versus Temperature
300
250
200
RL = 5.0 k
150
100
50
–50
40
35
30
150
RL = 5.0 k
TA = 25°C
MC33264D–5.0
55
RL = 100
50
45
V I – VO, DROPOUT VOLTAGE (mV) RL= 5.0 k
RL = 500
1.0
10
IO, OUTPUT CURRENT (mA)
100
400
0
50
TA, TEMPERATURE (°C)
100
APPLICATION INFORMATION
Introduction
The MC33264 regulators are designed with internal
current limiting and thermal shutdown making them
user–friendly. These regulators require only 0.33
µF
(or
greater) capacitance between the output terminal and ground
for stability for 2.8 V, 3.0 V, 3.3 V and 3.8 V output voltage
options. Output voltage options of 4.0 V, 4.75 V and 5.0 V
require only 0.22
µF
for stability. The output capacitor must
be mounted as close to the MC33264 as possible. If the
output capacitor must be mounted further than two
centimeters away from the MC33264, then a larger value of
output capacitor may be required for stability. A value of 0.68
µF
or larger is recommended. Most types of aluminum,
tantalum or multilayer ceramic will perform adequately. Solid
tantalums or appropriate multilayer ceramic capacitors are
recommended for operation below 25°C.
A bypass capacitor is recommended across the MC33264
input to ground if more than 4.0 inches of wire connects the
input to either a battery or power supply filter capacitor.
On/Off Control
On/Off control of the regulator may be accomplished in
either of two ways. Pin 3 may be tied to circuit ground and a
positive logic control applied to Pin 2. The regulator will be
turned on by a positive (>2.4 V) level, typically 5.0 V with
respect to ground, sourcing a typical current of 6.0
µA.
The
regulator will turn off if the control input is a logic “0”
(<0.5 V). Alternatively, Pin 2 may be tied to the regulator
input voltage and a negative logic control applied to Pin 3.
The regulator will be turned on when the control voltage is
less than Vin – 2.4 V, sinking a typical current of 18
µA
when
Vin = 6.0 V. The regulator is off when the control input is
open or greater than Vin – 0.2 V.
Programming The Output Voltage
The MC33264 output voltage is automatically set using its
internal voltage divider. Alternatively, it may be programmed
within a typical
±15%
range of its preset output voltage. An
external pair of resistors is required, as shown in Figure 7.
4
MOTOROLA ANALOG IC DEVICE DATA
MC33264
Figure 7. Regulator Output Voltage Trim
Vin
3.3
µF
1
Control Input
2
Vin
On/Off
Vout
Base
3
8
3.3
µF
Vout
3.0, 3.3 or 5.0 V
N/C
R1
N/C
Adj
5
0.01
7
On/Off
Gnd
6
4
R2
The complete equation for the output voltage is:
V out
+
Vref 1
)
R1
)
IFB R1
R2
where Vref is the nominal 1.235 V reference voltage and IFB is
the feedback pin bias current, nominally –20 nA. The
minimum recommended load current of 1.0
µA
forces an
upper limit of 1.2 MΩ on the value of R2, if the regulator must
work with no load. IFB will produce a 2% typical error in Vout
which may be eliminated at room temperature by adjusting
R1. For better accuracy, choosing R2 = 100 K reduces this
error to 0.17% while increasing the resistor program current
to 12
µA.
Output Noise
In many applications it is desirable to reduce the noise
present at the output. Reducing the regulator bandwidth by
increasing the size of the output capacitor is the only method
for reducing noise.
Noise can be reduced fourfold by a bypass capacitor
across R1, since it reduces the high frequency gain from 4 to
unity for the MC33264D–5.0. Pick
C
BYPASS
+
2π R1 x1 200 Hz
or about 0.01
µF.
When doing this, the output capacitor must
be increased to 3.3
µF
to maintain stability. These changes
reduce the output noise from 430
µV
to 100 Vrms for a
100 kHz bandwidth for the 5.0 V output device. With the
bypass capacitor added, noise no longer scales with output
voltage so that improvements are more dramatic at higher
output voltages.
TYPICAL APPLICATIONS
Figure 8. Lithium Ion Battery Cell Charger
Unregulated Input
6.0 to 10 Vdc
1
Vin
On/Off
Vout
7
0.1
3
Base
MC33264D–5.0
On/Off
4
N/C
N/C
0.22
50 k
200 k
1%
Lithium Ion
Rechargeable Cell
2
Control
8
1N4001
4.2 V
±
0.15 V
100 k
1%
Gnd
6
Ground
Adj
5
MOTOROLA ANALOG IC DEVICE DATA
5
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