Page 1
MIC5202 Micrel
MIC5202
Dual 100mA Low-Dropout Voltage Regulator
Preliminary Information
General Description
The MIC5202 is a family of dual linear voltage regulators with
very low dropout voltage (typically 17mV at light loads and
210mV at 100mA), and very low ground current (1mA at
100mA output–each section), offering better than 1% initial
accuracy with a logic compatible ON/OFF switching input.
Designed especially for hand-held battery powered devices,
the MIC5202 is switched by a CMOS or TTL compatible logic
signal. This ENABLE control my be tied directly to VIN if
unneeded. When disabled, power consumption drops nearly
to zero. The ground current of the MIC5202 increases only
slightly in dropout, further prolonging battery life. Key MIC5202
features include protection against reversed battery, current
limiting, and over-temperature shutdown.
The MIC5202 is available in several fixed voltages. Other
options are available; contact Micrel for details.
Ordering Information
Features
• High output voltage accuracy
• Variety of output voltages
• Guaranteed 100mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Reverse-battery protection
• Zero OFF mode current
• Logic-controlled electronic shutdown
• Available in SO-8 package
Applications
• Cellular Telephones
• Laptop, Notebook, and Palmtop Computers
• Battery Powered Equipment
• PCMCIA VCC and V
• Bar Code Scanners
• SMPS Post-Regulator/ DC to DC Modules
• High Efficiency Linear Power Supplies
Pin Configuration
Regulation/Switching
PP
3
Part Number Volts Accuracy Temperature Range* Package
MIC5202-3.0BM 3.0 1% –40°C to +125°C SO-8
MIC5202-3.3BM 3.3 1% –40°C to +125°C SO-8
MIC5202-4.8BM 4.85 1% –40°C to +125°C SO-8
MIC5202-5.0BM 5.0 1% –40°C to +125°C SO-8
* Junction Temperature
Other voltages are available; contact Micrel for details.
Typical Application
MIC5202-3.3
Output A
Output B
1µ (x2)
ENABLE pins may be tied directly to V
V
(A)
OUT
GROUND
V
(B)
OUT
GROUND
MIC5202-xxBM
Both GROUND pins must be tied to
the same potential. VIN (A) and VIN (B) may run
from separate supplies.
Enable A
Enable B
IN
VIN (A)
ENABLE (A)
VIN (B)
ENABLE (B)
July 1998 3-135
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MIC5202 Micrel
Absolute Maximum Ratings
Absolute Maximum Ratings indicate limits beyond which damage
to the device may occur. Electrical specifications do not apply when
operating the device beyond its specified Operating Ratings.
Recommended Operating Conditions
Input Voltage ............................................................... 2.5V to 26V
Operating Junction Temperature Range............. –40°C to +125°C
ENABLE Input Voltage..................................................... 0V to V
Power Dissipation ............................................... Internally Limited
Lead Temperature (Soldering, 5 seconds) .......................... 260°C
Operating Junction Temperature Range............. –40°C to +125°C
Input Supply Voltage................................................ –20V to +60V
ENABLE Input Voltage............................................. –20V to +60V
SO-8 θJA....................................................................... See Note 1
Electrical Characteristics
Limits in standard typeface are for TJ = 25°C and limits in boldface apply over the junction temperature range of –40°C to +125°C.
Specifications are for each half of the (dual) MIC5202. Unless otherwise specified, VIN = V
≥ 2.0V.
Symbol Parameter Condition Min Typ Max Units
V
O
∆V
O
∆T Temperature Coef.
∆V
O
V
O
∆V
O
V
O
V
– V
IN
Output Voltage Variation from specified V
Accuracy –2 2
OUT
Output Voltage (Note 2) 40 150 ppm/°C
Line Regulation VIN = V
+ 1 V to 26V 0.004 0.10 %
OUT
Load Regulation IL = 0.1mA to 100mA (Note 3) 0.04 0.16 %
Dropout Voltage IL = 100µA17mV
O
(Note 4) I
= 20mA 130
L
= 30mA 150
I
L
I
= 50mA 180
L
IL = 100mA 225 350
I
Q
I
GND
Quiescent Current V
Ground Pin Current V
CONTROL
CONTROL
= 20mA 270
I
L
= 30mA 330
I
L
I
= 50mA 500
L
≤ 0.7V (Shutdown) 0.01 µA
≥ 2.0V, IL = 100µA 170 µA
IL = 100mA 1200 1500
PSRR Ripple Rejection 75 dB
I
GNDDO
I
LIMIT
∆V
O
∆P
D
e
n
Ground Pin VIN = 0.5V less specified V
Current at Dropout (Note 5)
Current Limit V
= 0V 280 mA
OUT
Thermal Regulation (Note 6) 0.05 %/W
Output Noise 100 µV
, IL = 100µA 270 330 µA
OUT
+ 1V, IL = 1mA, CL = 10µF, and V
OUT
–1 1 %
CONTROL
0.40
0.30
IN
Control Input
Input Voltage Level
V
IL
I
IL
IH
Logic Low OFF 0.7 V
Logic High ON 2.0
Control Input Current VIL ≤ 0.7V 0.01 µA
VIH ≥ 2.0V 8 50
3-136 July 1998
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MIC5202 Micrel
0.0
0.1
0.2
0.3
0.4
-60 -30 0 30 60 90 120 150
DROPOUT VOLTAGE (V)
TEMPERATURE (°C)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
0246810
GROUND CURRENT (mA)
SUPPLY VOLTAGE (V)
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not
apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a
function of the maximum junction temperature, T
temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P
(T
J(MAX)–TA
regulator will go into thermal shutdown. The junction to ambient thermal resistance of the MIC5202BM is 160°C/W mounted
) / θ
Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the
JA.
on a PC board.
Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 3: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation
in the load range from 0.1mA to 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation
specification.
Note 4: Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value
measured at 1V differential.
Note 5: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply
is the sum of the load current plus the ground pin current.
Note 6: Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding
load or line regulation effects. Specifications are for a 100mA load pulse at V
for each section.
the junction-to-ambient thermal resistance, θJA, and the ambient
J(MAX)
= 26V for t = 10ms, and is measured separately
IN
(MAX)
=
3
Typical Characteristics
Dropout Voltage
vs. Output Current
250
200
150
100
50
DROPOUT VOLTAGE (mV)
0
0.01 0.1 1 10 100 1000
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
10
1
July 1998 3-137
GROUND CURRENT (mA)
0.1
0.01 0.1 1 10 100
OUTPUT CURRENT (mA)
(Each Regulator—2 Regulators/Package)
Dropout Voltage
vs. Temperature
IL = 100mA
IL = 1mA
Ground Current
vs. Supply Voltage
IL = 100mA
IL = 1mA
Dropout
3.5
3.0
2.5
2.0
1.5
1.0
OUTPUT VOLTAGE (V)
0.5
0.0
Characteristics
IL = 100mA
IL = 100µA, 1mA
0246810
INPUT VOLTAGE (V)
Output Voltage
vs. Output Current
3.5
3.0
2.5
2.0
1.5
1.0
OUTPUT VOLTAGE (V)
0.5
0.0
0.0 0.1 0.2 0.3
CIN = 2.2µF
= 4.7µF
C
OUT
OUTPUT CURRENT (A)
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MIC5202 Micrel
Ground Current
0.30
0.25
0.20
GROUND CURRENT (mA)
0.15
vs. Temperature
I
= 100µA
LOAD
= 2.2µF
C
IN
= 4.7µF
C
OUT
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Output Voltage vs. Temp.
3.6
3.5
3.4
3.3
3.2
3.1
OUTPUT VOLTAGE (V)
3.0
(3.3V Version)
CIN = 2.2µF
= 4.7µF
C
OUT
3 DEVICES:
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 100mA
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Ground Current
1.5
1.4
1.3
1.2
1.1
GROUND CURRENT (mA)
1.0
vs. Temperature
I
= 100mA
LOAD
= 2.2µF
C
IN
= 4.7µF
C
OUT
-50 0 50 100 150
TEMPERATURE (°C)
Output Current
300
280
260
240
220
200
180
160
140
OUTPUT CURRENT (mA)
120
100
vs. Temperature
V
= 3.3V
OUT
V
= 0V
OUT
(SHORT CIRCUIT)
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Thermal Regulation
100
50
∆ OUTPUT (mV)
200
-50
100
LOAD (mA)
-100
(3.3V Version)
0
0
-5 0 5 10 15 20 25 30 35
CL = 4.7 µF
TIME (ms)
Minimum Input Voltage
3.30
3.29
3.28
3.27
3.26
3.25
3.24
3.23
3.22
MIN. INPUT VOLTAGE (V)
3.21
3.20
vs. Temperature
CIN = 2.2µF
= 4.7µF
C
OUT
= 1mA
I
LOAD
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Short Circuit Current
300
250
200
150
100
SHORT CIRCUIT CURRENT (mA)
vs. Input Voltage
CIN = 2.2µF
= 4.7µF
C
OUT
= 3.3V
50
0
1234567
V
OUT
INPUT VOLTAGE (V)
Supply Current vs. Supply
Voltage (3.3V Version)
120
100
80
60
40
20
SUPPLY CURRENT (mA)
0
012345678910
SUPPLY VOLTAGE (V)
RL = 33Ω
Load Transient
20
10
0
-10
-20
∆ OUTPUT (mV)
-30
300
CL = 4.7µF
200
100
OUTPUT (mA)
0
-2 0246810
10
5
0
-5
∆ OUTPUT (mV)
8
-10
6
4
INPUT (V)
2
-0.2 0 0.2 0.4 0.6 0.8
TIME (ms)
Line Transient
CL = 1 µF
= 1mA
I
L
TIME (ms)
Load Transient
20
10
0
-10
-20
∆ OUTPUT (mV)
-30
300
CL = 47µF
200
100
OUTPUT (mA)
0
-10 0 10203040
TIME (ms)
Line Transient
15
10
5
0
∆ OUTPUT (mV)
8
-5
6
4
INPUT (V)
2
-0.1 0 0.1 0.2 0.3 0.4 0.5 0.6
CL = 10 µF
= 1mA
I
L
TIME (ms)
3-138 July 1998
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MIC5202 Micrel
-1
0
1
2
3
4
5
OUTPUT (V)
-2
0
2
4
-50 0 50 100 150 200 250 300
ENABLE (V)
TIME (µs)
-5
0
5
10
15
20
25
30
35
-60 -30 0 30 60 90 120 150
ENABLE CURRENT (µA)
TEMPERATURE (°C)
0
20
40
60
80
100
10x10
0
100x10
0
1x10
3
10x10
3
100x10
3
1x10
6
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
Supply Current vs. Supply
Voltage (3.3V Version)
60
50
40
30
20
10
SUPPLY CURRENT (mA)
0
01234567
1000
100
10
1
0.1
0.01
OUTPUT IMPEDANCE (Ω)
0.001
0
1x10
RL = 66Ω
SUPPLY VOLTAGE (V)
Output Impedance
IL = 100µA
IL = 1mA
IL = 100mA
0
0
3
100x10
1x10
10x10
FREQUENCY (Hz)
3
10x10
3
100x10
6
1x10
Enable Transient
(3.3V Version)
CL = 4.7 µF
= 1mA
I
L
Enable Current Threshold
vs. Temperature
CIN = 2.2µF
= 4.7µF
C
OUT
VEN = 5V
VEN = 2V
Enable Transient
(3.3V Version)
5
4
3
2
1
0
OUTPUT (V)
4
-1
CL = 4.7 µF
= 100mA
I
L
2
0
ENABLE (V)
-2
-50 0 50 100 150 200 250 300
TIME (µs)
Enable Voltage Threshold
1.6
1.4
1.2
0.8
ENABLE VOLTAGE (V)
0.6
0.4
vs. Temperature
CIN = 2.2µF
= 4.7µF
C
OUT
1
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
ON
OFF
3
100
80
60
40
20
RIPPLE VOLTAGE (dB)
0
0
10x10
July 1998 3-139
Ripple
vs. Frequency
IL = 100µA
0
3
1x10
100x10
FREQUENCY (Hz)
3
10x10
3
100x10
6
1x10
Ripple
vs. Frequency
IL = 1mA
Ripple
0
0
10x10
vs. Frequency
0
3
1x10
100x10
FREQUENCY (Hz)
100
80
60
40
20
RIPPLE VOLTAGE (dB)
IL = 100mA
3
10x10
3
100x10
6
1x10
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MIC5202 Micrel
Thermal ConsiderationsApplications Information
External Capacitors
A 1µF capacitor is recommended between the MIC5202
output and ground to prevent oscillations due to instability.
Larger values serve to improve the regulator's transient
response. Most types of tantalum or aluminum electrolytics
will be adequate; film types will work, but are costly and
therefore not recommended. Many aluminum electrolytics
have electrolytes that freeze at about –30°C, so solid tantalums
are recommended for operation below –25°C. The important
parameters of the capacitor are an effective series resistance
of about 5Ω or less and a resonant frequency above 500kHz.
The value of this capacitor may be increased without limit.
At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to
0.47µF for current below 10mA or 0.33µF for currents below
1 mA. A 1µF capacitor should be placed from the MIC5202
input to ground if there is more than 10 inches of wire between
the input and the AC filter capacitor or if a battery is used as
the supply.
ENABLE Input
The MIC5202 features nearly zero OFF mode current. When
the ENABLE input is held below 0.7V, all internal circuitry is
powered off. Pulling this pin high (over 2.0V) re-enables the
device and allows operation. The ENABLE pin requires a
small amount of current, typically 15µA. While the logic
threshold is TTL/CMOS compatible, ENABLE may be pulled
as high as 30V, independent of the voltage on VIN. The two
portions of the MIC5202 may be enabled separately.
Part I. Layout
The MIC5202-xxBM (8-pin surface mount package) has the
following thermal characteristics when mounted on a single
layer copper-clad printed circuit board.
PC Board θ
Dielectric
FR4 160°C/W
Ceramic 120°C/W
JA
Multi-layer boards having a ground plane, wide traces near
the pads, and large supply bus lines provide better thermal
conductivity.
The "worst case" value of 160°C/W assumes no ground plane,
minimum trace widths, and a FR4 material board.
Part II. Nominal Power Dissipation and Die Temperature
The MIC5202-xxBM at a 25°C ambient temperature will
operate reliably at up to 625mW power dissipation when
mounted in the "worst case" manner described above. At an
ambient temperature of 55°C, the device may safely dissipate
440mW. These power levels are equivalent to a die temperature of 125°C, the recommended maximum temperature for
non-military grade silicon integrated circuits.
General Notes
The MIC5202 will remain stable and in regulation with no load
in addition to the internal voltage divider, unlike many other
voltage regulators. This is especially important in CMOS
RAM keep-alive applications. Thermal shutdown is
independant on both halfs of the dual MIC5202, however an
over-temperature condition on one half might affect the other
because of proximity. When used in dual supply systems
where the regulator load is returned to a negative supply, the
output voltage must be diode clamped to ground.
Both MIC5202 GROUND pins must be tied to the same
ground potential. Isolation between the two halfs allows
connecting the two VIN pins to different supplies.
50 mil
245 mil
30 mil 50 mil
150 mil
Minimum recommended board pad size, SO-8.
3-140 July 1998
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