MIC5200 Micrel, Inc.
M9999-040805 1 April 2005
MIC5200
100mA Low-Dropout Regulator
General Description
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 espe-
cially 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 over-temperature shutdown.
The MIC5200 is available in several fixed voltages and ac-
curacy configurations. Other options are available; contact
Micrel for details.
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
• Zero OFF mode current
• Logic-controlled electronic shutdown
• Available in 8-lead SOIC, MM8™ 8-lead MSOP,
and SOT-223 packages
Applications
• 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
Typical Application
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
MIC5200-3.3
Enable
Output
1µF
MIC5200 Micrel, Inc.
April 2005 2 M9999-040805
Pin Description
Pin Number Pin Number Pin Name Pin Function
SOT-223 SO-8, MSOP-8
3 1, 2 OUT Output: Pins 1 and 2 must be externally connected together.
3, 6 NC (not internally connected): Connect to ground plane for lowest thermal resis-
tance.
2, TAB 4 GND Ground: Ground pin and TAB are internally connected.
5 EN Enable/Shutdown (Input): TTL compatible input. High = enabled;
low = shutdown.
1 7, 8 IN Supply Input: Pins 7 and 8 must be extenally connected together.
EN may be tied directly to VIN
Pin Configuration
12 3
IN GND OUT
GND
OUT IN
EN
OUT
NC
IN
NC
Ordering Information
Part Number Voltage Accuracy Junction Temp. Range* Package
Standard Pb-Free
MIC5200-3.0BM MIC5200-3.0YM 3.0 1% -40°C to +125°C 8-Pin SOIC
MIC5200-3.3BM MIC5200-3.3YM 3.3 1% -40°C to +125°C 8-Pin SOIC
MIC5200-4.8BM MIC5200-4.8YM 4.8 1% -40°C to +125°C 8-Pin SOIC
MIC5200-5.0BM MIC5200-5.0YM 5.0 1% -40°C to +125°C 8-Pin SOIC
MIC5200-3.3BMM MIC5200-3.3YMM 3.3 1% -40°C to +125°C 8-Pin MSOP
MIC5200-5.0BMM MIC5200-5.0YMM 5.0 1% -40°C to +125°C 8-Pin MSOP
MIC5200-3.0BS MIC5200-3.0YS 3.0 1% -40°C to +125°C 3-lead SOT-223
MIC5200-3.3BS MIC5200-3.3YS 3.3 1% -40°C to +125°C 3-lead SOT-223
MIC5200-4.8BS MIC5200-4.8YS 4.8 1% -40°C to +125°C 3-lead SOT-223
MIC5200-5.0BS MIC5200-5.0YS 5.0 1% -40°C to +125°C 3-lead SOT-223
* Other voltage options available. Contact Micrel Marketing for information.
MIC5200-x.xBS
(SOT-223)
MIC5200-x.xBM
(SOIC-8)
MIC5200-x.xBM
(MSOP-8)
MIC5200 Micrel, Inc.
M9999-040805 3 April 2005
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. Un-
less otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 3.3µF, and VENABLE ≥ 2.0V
Symbol Parameter Conditions Min Typical Max Units
VO Output Voltage Variation from specified VOUT –1 1 %
Accuracy –2 2
∆VO Output Voltage (Note 2) 40 150 ppm/°C
∆T Temperature Coef.
∆VO Line Regulation VIN = VOUT + 1 V to 26V 0.004 0.10 %
VIN 0.40
∆VO Load Regulation IL = 0.1mA to 100mA (Note 3) 0.04 0.16 %
VOUT 0.30
VIN – VO Dropout Voltage IL = 100µA 17 mV
(Note 4) IL = 20mA 130
IL = 30mA 150
IL = 50mA 190
IL = 100mA 230 350
IGND Quiescent Current VENABLE ≤ 0.7V (Shutdown) 0.01 10 µA
IGND Ground Pin Current VENABLE ≥ 2.0V, IL = 100µA 130 µA
IL = 20mA 270 350
IL = 30mA 330
IL = 50mA 500
IL = 100mA 1000 1500
PSRR Ripple Rejection 70 dB
IGNDDO Ground Pin VIN = 0.5V less than specified VOUT 270 330 µA
Current at Dropout IL = 100µA (Note 5)
ILIMIT Current Limit VOUT = 0V 100 250 mA
∆VO Thermal Regulation (Note 6) 0.05 %/W
∆PD
en Output Noise 100 µV
ENABLE Input
Input Voltage Level
VIL Logic Low OFF 0.7 V
Logic High ON 2.0
IIL ENABLE Input Current VIL ≤ 0.7V 0.01 1 µA
IIH VIH ≥ 2.0V 15 50
Absolute Maximum Ratings
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
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 .....................................................–20V to VIN
MIC5200 Micrel, Inc.
April 2005 4 M9999-040805
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 tem-
perature, 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 regula-
tion 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.
MIC5200 Micrel, Inc.
M9999-040805 5 April 2005
0.15
0.20
0.25
0.30
-60 -30 0 30 60 90 120 150
GROUND CURRENT (mA)
TEMPERATURE (°C)
Ground Current
vs. Temperature
ILOAD = 100µA
CIN = 2.2µF
COUT = 4.7µF
1.0
1.1
1.2
1.3
1.4
1.5
-50 0 50 100 150
GROUND CURRENT (mA)
TEMPERATURE (°C)
Ground Current
vs. Temperature
ILOAD = 100mA
CIN = 2.2µF
COUT = 4.7µF
-100
0
100
200
-5 0 5 10 15 20 25 30 35
LOAD (mA)
TIME (ms)
Thermal Regulation
(3.3V Version)
-50
0
50
100
∆ OUTPUT (mV)
CL= 4.7 µF
3.0
3.1
3.2
3.3
3.4
3.5
3.6
-60 -30 0 30 60 90 120 150
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
Output Voltage vs. Temp.
(3.3V Version)
CIN = 2.2µF
COUT = 4.7µF
3 DEV IC ES :
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 100mA
100
120
140
160
180
200
220
240
260
280
300
-60 -30 0 30 60 90 120 150
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
Output Current
vs. Temperature
VOUT = 0V
(SHORT CIRCUIT)
VOUT = 3.3V
3.20
3.21
3.22
3.23
3.24
3.25
3.26
3.27
3.28
3.29
3.30
-60 -30 0 30 60 90 120 150
MIN. INPUT VOLTAGE (V)
TEMPERATURE (°C)
Minimum Input Voltage
vs. Temperature
CIN = 2.2µF
COUT = 4.7µF
ILOAD = 1mA
0
50
100
150
200
250
0.01 0.1 1 10 100 1000
DROPOUT VOLTAGE (mV)
OUTPUT CURRENT (mA)
Dropout Voltage
vs. Output Current
0.0
0.1
0.2
0.3
0.4
-60 -30 0 30 60 90 120 150
DROPOUT VOLTAGE (V)
TEMPERATURE (°C)
Dropout Voltage
vs. Temperature
IL= 100mA
IL= 1mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0246810
OUTPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Dropout
Characteristics
IL= 100mA
IL= 100µA,1mA
0.1
1
10
0.01 0.1 1 10 100
GROUND CURRENT (mA)
OUTPUT CURRENT (mA)
Ground Current
vs. Output Current
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)
Ground Current
vs. Supply Voltage
IL= 100mA
IL= 1mA
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0.0 0.1 0.2 0.3
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (A)
Output Voltage
vs. Output Current
CIN = 2.2µF
COUT = 4.7µF
Typical Characteristics
MIC5200 Micrel, Inc.
April 2005 6 M9999-040805
0
50
100
150
200
250
300
1234567
SHORT CIRCUIT CURRENT (mA)
INPUT VOLTAGE (V)
Short Circuit Current
vs. Input Voltage
CIN = 2.2µF
COUT = 4.7µF
VOUT = 3.3V
-30
-20
-10
0
10
20
∆ OUTPUT (mV)
0
100
200
300
-2 0246810
OUTPUT (mA)
TIME (ms)
Load Transient
CL= 4.7µF
0
20
40
60
80
100
120
012345678910
SUPPLY CURRENT (mA)
SUPPLY VOLTAGE (V)
Supply Current vs. Supply
Voltage (3.3V Version)
RL= 33Ω
-10
-5
0
5
10
∆ OUTPUT (mV)
2
4
6
8
-0.2 0 0.2 0.4 0.6 0.8
INPUT (V)
TIME (ms)
Line Transient
CL= 1 µF
IL= 1mA
0
10
20
30
40
50
60
01234567
SUPPLY CURRENT (mA)
SUPPLY VOLTAGE (V)
Supply Current vs. Supply
Voltage (3.3V Version)
RL= 66Ω
-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)
Enable Transient
(3.3V Version)
CL= 4.7 µF
IL= 100mA
0.001
0.01
0.1
1
10
100
1000
1x100
10x100
100x100
1x103
10x103
100x103
1x106
OUTPUT IMPEDANCE (Ω)
FREQUENCY (Hz)
Output Impedance
IL= 100µA
IL= 1mA
IL= 100mA
-5
0
5
10
15
20
25
30
35
-60 -30 0 30 60 90 120 150
ENABLE CURRENT (µA)
TEMPERATURE (°C)
Enable Current Threshold
vs. Temperature
CIN = 2.2µF
COUT = 4.7µF
VE N = 2V
VE N = 5V
0.4
0.6
0.8
1
1.2
1.4
1.6
-60 -30 0 30 60 90 120 150
ENABLE VOLTAGE (V)
TEMPERATURE (°C)
Enable Voltage Threshold
vs. Temperature
CIN = 2.2µF
COUT = 4.7µF
OFF
ON
-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)
Enable Transient
(3.3V Version)
CL= 4.7 µF
IL= 1mA
MIC5200 Micrel, Inc.
M9999-040805 7 April 2005
0
20
40
60
80
100
10x100
100x100
1x103
10x103
100x103
1x106
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
Ripple
vs. Frequency
IL= 100µA
0
20
40
60
80
100
10x100
100x100
1x103
10x103
100x103
1x106
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
Ripple
vs. Frequency
IL= 1mA
0
20
40
60
80
100
10x100
100x100
1x103
10x103
100x103
1x106
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
Ripple
vs. Frequency
IL= 100mA
MIC5200 Micrel, Inc.
April 2005 8 M9999-040805
Thermal ConsiderationsApplications Information
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 ad-
equate; 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 pa-
rameters 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.
ENABLE Input
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.
PC Board θJA
Dielectric
FR4 160°C/W
Ceramic 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 oper-
ate 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 character-
istics, please refer to Micrel Application Hint 17, “Calculating
P.C. Board Heat Sink Area for Surface Mount Packages”.
Part I. Layout
The MIC5200-xxBM (8-pin surface mount package) has the
following thermal characteristics when mounted on a single
layer copper-clad printed circuit board.
245 mil
150 mil
50 mil
50 mil
30 mil
Minimum recommended board pad size, SO-8.
MIC5200 Micrel, Inc.
M9999-040805 9 April 2005
Package Information
8-Pin SOIC (M)
0.008 (0.20)
0.004 (0.10)
0.039 (0.99)
0.035 (0.89)
0.021 (0.53)
0.012 (0.03) R
0.0256 (0.65) TYP
0.012 (0.30) R
5 MAX
0 MIN
0.122 (3.10)
0.112 (2.84)
0.120 (3.05)
0.116 (2.95)
0.012 (0.3)
0.007 (0.18)
0.005 (0.13)
0.043 (1.09)
0.038 (0.97)
0.036 (0.90)
0.032 (0.81)
DIMENSIONS:
INCH (MM)
0.199 (5.05)
0.187 (4.74)
8-Lead MSOP (MM)
MIC5200 Micrel, Inc.
April 2005 10 M9999-040805
16°
10°
0.84 (0.033)
0.64 (0.025)
1.04 (0.041)
0.85 (0.033)
2.41 (0.095)
2.21 (0.087)
4.7 (0.185)
4.5 (0.177)
6.70 (0.264)
6.30 (0.248)
7.49 (0.295)
6.71 (0.264)
3.71 (0.146)
3.30 (0.130)
3.15 (0.124)
2.90 (0.114)
10°
MAX
0.10 (0.004)
0.02 (0.0008)
0.38 (0.015)
0.25 (0.010)
C
L
DI M E N S I O N S :
MM (INCH)
C
L
1.70 (0.067)
1.52 (0.060)
0.91 (0.036) MIN
SOT-223 (S)
MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 1998 Micrel Incorporated