MICREL MIC5200

MIC5200
Micrel
MIC5200
100mA Low-Dropout Voltage Regulator
Preliminary Information
General Description
Features
The MIC5200 is an efficient linear voltage regulator with very
low dropout voltage (typically 17mV at light loads and 200mV
at 100mA), and very low ground current (1mA at 100mA
output), offering better than 1% initial accuracy with a logic
compatible ON/OFF switching input. Designed especially for
hand-held battery powered devices, the MIC5200 is switched
by a CMOS or TTL compatible logic signal. The ENABLE
control may be tied directly to VIN if unneeded. When disabled,
power consumption drops nearly to zero. The ground current
of the MIC5200 increases only slightly in dropout, further
prolonging battery life. Key MIC5200 features include protection against reversed battery, current limiting, and overtemperature shutdown.
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The MIC5200 is available in several fixed voltages and
accuracy configurations. Other options are available; contact
Micrel for details.
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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
Zero OFF mode current
Logic-controlled electronic shutdown
Available in 8-lead SOIC, MM8™ 8-lead MSOP,
and SOT-223 packages
Applications
3
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery Powered Equipment
PCMCIA VCC and VPP Regulation/Switching
Bar Code Scanners
SMPS Post-Regulator/ DC to DC Modules
High Efficiency Linear Power Supplies
Ordering Information
Part Number
Voltage
Accuracy
Junction Temp. Range*
Package
MIC5200-3.0BM
3.0
1%
–40°C to +125°C
SO-8
MIC5200-3.3BM
3.3
1%
–40°C to +125°C
SO-8
MIC5200-4.8BM
4.85
1%
–40°C to +125°C
SO-8
MIC5200-5.0BM
5.0
1%
–40°C to +125°C
SO-8
MIC5200-3.3BMM
3.3V
1%
–40°C to +125°C
MSOP-8
MIC5200-5.0BMM
5.0V
1%
–40°C to +125°C
MSOP-8
MIC5200-3.0BS
3.0
1%
–40°C to +125°C
SOT-223
MIC5200-3.3BS
3.3
1%
–40°C to +125°C
SOT-223
MIC5200-4.8BS
4.85
1%
–40°C to +125°C
SOT-223
MIC5200-5.0BS
5.0
1%
–40°C to +125°C
SOT-223
Other voltages available. Contact Micrel for details.
Typical Application
MIC5200-3.3
Output
1µF
Enable
3-123
July 1998
MIC5200
Micrel
Pin Configuration
OUT
OUT
NC
GND
IN
IN
NC
EN
MIC5200-x.xBM
(SO-8)
MIC5200-x.xBMM
(MSOP-8)
1 2
3
IN GND OUT
MIC5200-x.xBS
(SOT-223)
EN may be tied directly to VIN
Pin Description
Pin Number
SOT-223
Pin Number
SO-8, MSOP-8
Pin Name
3
1, 2
OUT
3, 6
NC
4
GND
5
EN
Enable/Shutdown (Input): TTL compatible input. High = enabled;
low = shutdown.
7, 8
IN
Supply Input: Pins 7 and 8 must be extenally connected together.
2, TAB
1
Pin Function
Output: Pins 1 and 2 must be externally connected together.
(not internally connected): Connect to ground plane for lowest thermal
resistance.
Ground: Ground pin and TAB are internally connected.
Absolute Maximum Ratings
Recommended Operating Conditions
Power Dissipation ............................................... Internally Limited
Lead Temperature (soldering, 5 sec.) .................................. 260°C
Operating Junction Temperature Range ............. –40°C to +125°C
Input Supply Voltage ................................................ –20V to +60V
Enable Input Voltage ................................................ –20V to +60V
Thermal Characteristics
SOT-223 (θJC) ..................................................................... 15°C/W
SO-8 (θJA) ..................................................................... See Note 1
Input Voltage ............................................................... 2.5V to 26V
Operating Junction Temperature Range ............. –40°C to +125°C
Enable Input Voltage .................................................... –20V to VIN
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.
July 1998
3-124
MIC5200
Micrel
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.
Unless otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 3.3µF, and VENABLE ≥ 2.0V
Symbol
Parameter
Conditions
Min
VO
Output Voltage
Accuracy
Variation from specified VOUT
∆VO
∆T
Output Voltage
Temperature Coef.
(Note 2)
∆VO
VIN
Line Regulation
∆VO
VOUT
VIN – VO
Typical
Max
Units
1
2
%
40
150
ppm/°C
VIN = VOUT + 1 V to 26V
0.004
0.10
0.40
%
Load Regulation
IL = 0.1mA to 100mA (Note 3)
0.04
0.16
0.30
%
Dropout Voltage
(Note 4)
IL = 100µA
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
17
130
150
190
230
350
10
–1
–2
IGND
Quiescent Current
VENABLE ≤ 0.7V (Shutdown)
0.01
IGND
Ground Pin Current
VENABLE ≥ 2.0V, IL = 100µA
IL = 20mA
IL = 30mA
IL = 50mA
IL = 100mA
130
270
330
500
1000
PSRR
Ripple Rejection
IGNDDO
Ground Pin
Current at Dropout
VIN = 0.5V less than specified VOUT
IL = 100µA (Note 5)
ILIMIT
Current Limit
VOUT = 0V
∆VO
∆PD
Thermal Regulation
(Note 6)
en
Output Noise
mV
µA
350
1500
70
270
100
µA
dB
330
µA
250
mA
0.05
%/W
100
µV
ENABLE Input
VIL
Input Voltage Level
Logic Low
Logic High
OFF
ON
0.7
V
1
50
µA
2.0
VIL ≤ 0.7V
VIH ≥ 2.0V
IIL
IIH
ENABLE Input Current
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, TJ (MAX), the junction-to-ambient thermal resistance, θJA, and the ambient
temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) =
(TJ(MAX) – TA) ÷ θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the
regulator will go into thermal shutdown. The θJC of the MIC5200-xxBS is 15°C/W and θJA for the MIC5200BM is 160°C/W
mounted on a PC board (see “Thermal Considerations” section for further details).
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 VIN = 26V for t = 10ms.
0.01
15
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July 1998
3
MIC5200
Micrel
Typical Characteristics
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
50
0
0.01
IL = 100mA
0.2
0.1
IL = 1mA
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
0.1
1
10
100 1000
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
0.1
0.01
0.8
0.6
0.0
0.1
1
10
100
OUTPUT CURRENT (mA)
IL = 100mA
IL = 1mA
0.2
0
Ground Current
vs. Temperature
0.15
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3.4
3.3
3.2
3.1
3 DEVICES:
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 100mA
3.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
July 1998
0
∆ OUTPUT (mV)
1.3
ILOAD = 100mA
CIN = 2.2µF
COUT = 4.7µF
1.2
1.1
0
50
100
TEMPERATURE (°C)
260
VOUT = 3.3V
200
180
160
140
VOUT = 0V
(SHORT CIRCUIT)
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3-126
10
CIN = 2.2µF
COUT = 4.7µF
2.5
2.0
1.5
1.0
0.5
0.1
0.2
OUTPUT CURRENT (A)
0.3
100
50
0
CL = 4.7 µF
200
-50
100
0
-100
-5
150
300
280
240
220
2
4
6
8
INPUT VOLTAGE (V)
3.0
Output Current
vs. Temperature
Output Voltage vs. Temp.
(3.3V Version)
CIN = 2.2µF
COUT = 4.7µF
1.4
1.0
-50
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
3.5
IL = 100µA, 1mA
0.5
Thermal Regulation
(3.3V Version)
LOAD (mA)
GROUND CURRENT (mA)
GROUND CURRENT (mA)
0.20
1.0
0.0
0.0
10
1.5
ILOAD = 100µA
CIN = 2.2µF
COUT = 4.7µF
1.5
Ground Current
vs. Temperature
0.30
3.6
2
4
6
8
SUPPLY VOLTAGE (V)
2.0
3.5
1.2
0.4
IL = 100mA
2.5
Output Voltage
vs. Output Current
1.4
1.0
3.0
0.0
Ground Current
vs. Supply Voltage
1.6
GROUND CURRENT (mA)
GROUND CURRENT (mA)
10
1
OUTPUT VOLTAGE (V)
100
0.3
OUTPUT VOLTAGE (V)
150
3.5
0
5
10 15 20 25 30 35
TIME (ms)
Minimum Input Voltage
vs. Temperature
MIN. INPUT VOLTAGE (V)
200
0.25
Dropout
Characteristics
0.4
DROPOUT VOLTAGE (V)
DROPOUT VOLTAGE (mV)
250
3.30
3.29
3.28
3.27
3.26
CIN = 2.2µF
COUT = 4.7µF
ILOAD = 1mA
3.25
3.24
3.23
3.22
3.21
3.20
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC5200
Micrel
Load Transient
150
CIN = 2.2µF
COUT = 4.7µF
VOUT = 3.3V
100
50
1
2
3
4
5
6
INPUT VOLTAGE (V)
CL = 4.7µF
300
-30
200
100
0
-2
7
0
Supply Current vs. Supply
Voltage (3.3V Version)
∆ OUTPUT (mV)
100
80
RL = 33Ω
20
0
0
6
4
10
0
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
5
4
3
2
1
0
4
-1
0
ENABLE CURRENT (µA)
IL = 100µA
IL = 1mA
1
0.1
0.01
1x106
100x103
10x103
100x100
10x100
IL = 100mA
30
25
40
3
0
6
4
0
0.1 0.2 0.3 0.4 0.5 0.6
TIME (ms)
Enable Transient
(3.3V Version)
5
4
3
2
1
0
4
-1
CL = 4.7 µF
IL = 100mA
2
0
-2
-50
50 100 150 200 250 300
TIME (µs)
0
50 100 150 200 250 300
TIME (µs)
Enable Voltage Threshold
vs. Temperature
1.6
CIN = 2.2µF
COUT = 4.7µF
20
15
VEN = 5V
10
5
0
30
8
-5
Enable Current Threshold
vs. Temperature
10
1x100
0
10
20
TIME (ms)
CL = 10 µF
IL = 1mA
5
2
-0.1
0.8
35
1x103
OUTPUT IMPEDANCE (Ω)
0.6
2
Output Impedance
0.001
0.2
0.4
TIME (ms)
CL = 4.7 µF
IL = 1mA
-2
-50
7
1000
100
0
ENABLE (V)
OUTPUT (V)
ENABLE (V)
SUPPLY CURRENT (mA)
30
RL = 66Ω
0
10
Enable Transient
(3.3V Version)
60
20
0
-10
Line Transient
-5
Supply Current vs. Supply
Voltage (3.3V Version)
40
100
15
CL = 1 µF
IL = 1mA
5
2
-0.2
0 1 2 3 4 5 6 7 8 9 10
SUPPLY VOLTAGE (V)
50
200
10
8
-10
40
300
-30
INPUT (V)
60
8
CL = 47µF
Line Transient
10
INPUT (V)
SUPPLY CURRENT (mA)
120
2
4
6
TIME (ms)
0
-10
-20
VEN = 2V
-5
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
ENABLE VOLTAGE (V)
0
0
-10
-20
∆ OUTPUT (mV)
200
20
10
OUTPUT (V)
250
Load Transient
20
10
OUTPUT (mA) ∆ OUTPUT (mV)
OUTPUT (mA) ∆ OUTPUT (mV)
SHORT CIRCUIT CURRENT (mA)
Short Circuit Current
vs. Input Voltage
300
1.4
1.2
CIN = 2.2µF
COUT = 4.7µF
1
0.8
ON
OFF
0.6
0.4
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
FREQUENCY (Hz)
3-127
July 1998
MIC5200
Micrel
Ripple
vs. Frequency
FREQUENCY (Hz)
IL = 100mA
60
40
Applications Information
1x106
100x103
10x100
FREQUENCY (Hz)
10x103
20
0
1x106
0
100x103
20
80
1x103
RIPPLE VOLTAGE (dB)
40
10x103
1x106
100x103
10x103
10x100
1x103
20
60
1x103
40
IL = 1mA
100x100
60
100
80
10x100
RIPPLE VOLTAGE (dB)
IL = 100µA
100x100
RIPPLE VOLTAGE (dB)
80
0
Ripple
vs. Frequency
100
100x100
Ripple
vs. Frequency
100
FREQUENCY (Hz)
Thermal Considerations
Part I. Layout
External Capacitors
A 1µF capacitor is recommended between the MIC5200
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 tantalum capacitors
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 MIC5200
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 input.
The MIC5200 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.
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.
The MIC5200-xxBM (8-pin surface mount package) has the
following thermal characteristics when mounted on a single
layer copper-clad printed circuit board.
θJA
PC Board
Dielectric
FR4
Ceramic
160°C/W
120°C/W
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 MIC5200-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.
For MIC5200-xxBS (SOT-223 package) heat sink characteristics, please refer to Micrel Application Hint 17, “Calculating
P.C. Board Heat Sink Area for Surface Mount Packages”.
ENABLE Input
50 mil
The MIC5200 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.
245 mil
150 mil
30 mil
50 mil
Minimum recommended board pad size, SO-8.
July 1998
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