MICREL MIC5203

MIC5203
μCap 80mA Low-Dropout Regulator
General Description
Features
The MIC5203 is a µCap 80mA linear voltage regulator with
very low dropout voltage (typically 20mV at light loads and
300mV at 80mA) and very low ground current (225µA at
20mA output), offering better than 3% initial accuracy with
a logic-compatible enable input.
TheµCap regulator design is optimized to work with lowvalue, low-cost ceramic capacitors. The outputs typically
require only 0.47µF of output capacitance for stability.
Designed especially for hand-held, battery-powered
devices, the MIC5203 can be controlled by a CMOS or
TTL compatible logic signal. When disabled, power
consumption drops nearly to zero. If on-off control is not
required, the enable pin may be tied to the input for 3terminal operation. The ground current of the MIC5203
increases only slightly in dropout, further prolonging
battery life. Key MIC5203 features include current limiting,
overtemperature shutdown, and protection against
reversed battery.
The MIC5203 is available in 2.8V, 3.0V, 3.3V, 3.6V, 3.8V,
4.0V, 4.5V, 4.75V, and 5.0V fixed voltages. Other voltages
are available.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
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Tiny 4- and 5-lead surface-mount packages
Wide selection of output voltages
Guaranteed 80mA output
Low quiescent current
Low dropout voltage
Low temperature coefficient
Current and thermal limiting
Reversed input polarity protection
Zero off-mode current
Logic-controlled shutdown
Stability with low-ESR ceramic capacitors
Applications
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Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
Barcode scanners
SMPS post-regulator/DC-to-DC modules
High-efficiency linear power supplies
_________________________________________________________________________________________________________________________
Typical Application
Enable
Shutdown
LAxx
1
VOUT
0.47µF
SOT-143 Version
5
2
Enable
Shutdown
3
VOUT
0.47µF
4
SOT-23-5 Version
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2009
M9999-111909
Micrel, Inc.
MIC5203
Ordering Information(1)
Part Number
Standard
Marking
Pb-Free
Marking
Voltage
Temperature Range
Package
MIC5203-2.6BM4
LA26
MIC5203-2.6YM4
LA26
2.6V
–40° to +125°C
SOT-143
MIC5203-2.8BM4
LA28
MIC5203-2.8YM4
LA28
2.8V
–40° to +125°C
SOT-143
MIC5203-3.0BM4
LA30
MIC5203-3.0YM4
LA30
3.0V
–40° to +125°C
SOT-143
MIC5203-3.3BM4
LA33
MIC5203-3.3YM4
LA33
3.3V
–40° to +125°C
SOT-143
MIC5203-3.6BM4
LA36
MIC5203-3.6YM4
LA36
3.6V
–40° to +125°C
SOT-143
MIC5203-3.8BM4
LA38
MIC5203-3.8YM4
LA38
3.8V
–40° to +125°C
SOT-143
MIC5203-4.0BM4
LA40
MIC5203-4.0YM4
LA40
4.0V
–40° to +125°C
SOT-143
MIC5203-4.5BM4
LA45
MIC5203-4.5YM4
LA45
4.5V
–40° to +125°C
SOT-143
MIC5203-4.7BM4
LA47
MIC5203-4.7YM4
LA47
4.7V
–40° to +125°C
SOT-143
MIC5203-5.0BM4
LA50
MIC5203-5.0YM4
LA50
5.0V
–40° to +125°C
SOT-143
MIC5203-2.6BM5
LK26
MIC5203-2.6YM5
LK26
2.6V
–40° to +125°C
SOT-23-5
MIC5203-2.8BM5
LK28
MIC5203-2.8YM5
LK28
2.8V
–40° to +125°C
SOT-23-5
MIC5203-3.0BM5
LK30
MIC5203-3.0YM5
LK30
3.0V
–40° to +125°C
SOT-23-5
MIC5203-3.3BM5
LK33
MIC5203-3.3YM5
LK33
3.3V
–40° to +125°C
SOT-23-5
MIC5203-3.6BM5
LK36
MIC5203-3.6YM5
LK36
3.6V
–40° to +125°C
SOT-23-5
MIC5203-3.8BM5
LK38
MIC5203-3.8YM5
LK38
3.8V
–40° to +125°C
SOT-23-5
MIC5203-4.0BM5
LK40
MIC5203-4.0YM5
LK40
4.0V
–40° to +125°C
SOT-23-5
MIC5203-4.5BM5
LK45
MIC5203-4.5YM5
LK45
4.5V
–40° to +125°C
SOT-23-5
MIC5203-4.7BM5
LK47
MIC5203-4.7YM5
LK47
4.7V
–40° to +125°C
SOT-23-5
MIC5203-5.0BM5
LK50
MIC5203-5.0YM5
LK50
5.0V
–40° to +125°C
SOT-23-5
Note:
1. Other Voltage available. Contact Micrel for details.
November 2009
2
M9999-111909
Micrel, Inc.
MIC5203
Pin Configuration
EN
GND
2
1
E N GND IN
3
Part
Identification
LAxx
2
1
LKxx
3
4
4
5
IN
OUT
NC
OUT
SOT-143 (M4)
SOT-23-5 (M5)
Pin Description
Pin Number
SOT-143
Pin Number
SOT-23-5
Pin Name
1
2
GND
2
3
EN
Enable (Input): TTL/CMOS compatible control input. Logic high =
enabled; logic low or open = shutdown.
3
1
IN
Supply input.
4
NC
Not internally connected.
5
OUT
4
November 2009
Pin Name
Ground.
Regulator output.
3
M9999-111909
Micrel, Inc.
MIC5203
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) ....................................... –20V to +20V
Enable Input Voltage (VEN)............................. –20V to +20V
Power Dissipation (PD) ..............................Internally Limited
Storage Temperature (Ts).........................–60°C to +150°C
Lead Temperature (soldering, #sec.)......................... 260°C
Input Voltage (VIN)............................................. 2.5V to 16V
Enable Input Voltage (VEN)..................................... 0V to VIN
Junction Temperature Range ................... –40°C to +125°C
Thermal Resistance (θJA) ...........................................Note 3
Electrical Characteristics
VIN = VOUT + 1V; IL = 1mA; CL = 0.47μF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
VO
Output voltage accuracy
∆VO/∆T
Output voltage temperature
coefficient
Note 4
∆VO/VO
Line regulation
VIN = VOUT + 1V to 16V
∆VO/VO
Load regulation
IL = 0.1mA to 80mA(5)
∆VO – VO
IQ
IGND
Dropout voltage(6)
Quiescent current
Ground pin current(7)
Condition
Min
Typ
–3
3
–4
4
50
200
0.008
0.3
0.5
0.08
0.3
0.5
Units
%
pm/°C
%
%
IL = 100 μA
20
IL = 20mA
200
IL = 50mA
250
IL = 80mA
300
600
VEN ≤ 0.4V (shutdown)
0.01
10
IL = 100 μA, VEN ≥ 2.0V (active)
180
IL = 20mA, VEN ≥ 2.0V (active)
225
IL = 50mA, VEN ≥ 2.0V (active)
850
IL = 80mA, VEN ≥ 2.0V (active)
1800
3000
200
300
μA
250
mA
(7)
IGNDDO
Ground pin current at dropout
VIN = VOUT(nominal) – 0.5V
ILIMIT
Current limit
VOUT = 0V
180
∆VO/∆PD
Thermal regulation
Note 8
0.05
November 2009
Max
4
350
750
mV
μA
μA
%/W
M9999-111909
Micrel, Inc.
MIC5203
Electrical Characteristics (continued)
VIN = VOUT + 1V; IL = 1mA; CL = 0.47μF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C≤ TJ ≤ +125°C, unless noted.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Enable Input
VIL
VIH
IIL
IIH
Enable input voltage level
Enable input current
0.6
Logic low (off)
Logic high (on)
2.0
VIL ≤ 0.6V
0.01
1
VIH ≥ 2.0V
15
50
V
μA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation at any TA (ambient temperature) is PD(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 θJA is 250°C/W for the SOT-143 and 220°C/W
for the SOT-23-5 mounted on a printed circuit board.
4. Output voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
5. 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 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
6. 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.
7. 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.
8. 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 150mA load pulse at VIN = 16V for t = 10ms.
November 2009
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M9999-111909
Micrel, Inc.
MIC5203
Typical Characteristics
2.0
CIN = 10∝F
COUT = 1∝F
1.5
1.0
0.5
50
100
150
200
OUTPUT CURRENT (mA)
SHORT CIRCUIT CURRENT (mA)
OUTPUT VOLTAGE (V)
2.5
Output Voltage
vs. Temperature
4.0
CIN = 10∝F
COUT = 1∝F
3.8
3.6
3.4
3.2
3 DEVICES
HI / AVG / LO
3.0
2.8
CURVES APPLICABLE
AT 100∝A AND 50mA
2.4
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
November 2009
GROUND CURRENT (mA)
VOUT = 3.3V
1.0
0.5
160
1
2
3
4 5 6
SUPPLY VOLTAGE (V)
7
140
120
100
80
CIN = 10∝F
COUT = 1∝F
40
20
0
200
0
1
2
3
4 5 6
INPUT VOLTAGE (V)
CIN = 10∝F
COUT = 1∝F
0
1
2
3
4 5 6
SUPPLY VOLTAGE (V)
160
CIN = 10∝F
COUT = 1∝F
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
2.5
7
Ground Current
vs. Temperature
CIN = 10∝F
COUT = 1∝F
IL = 80mA
2.0
1.5
1.0
IL = 50mA
0.5
IL = 100∝A
Thermal Regulation
(3.3V Version)
50
0
-50
-2 0
Short Circuit Current
vs. Temperature
6
1
60
40
20
0
-20
-40
-60
100
7
180
140
IL = 80mA
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
Short Circuit Current
vs. Input Voltage
60
2
3.0
IL = 50mA
IL = 100∝A
IL = 100∝A
3
0
Ground Current
vs. Supply Voltage
1.5
0.0
0
Output Voltage
vs. Output Current
3.0
0.0
0
OUTPUT VOLTAGE (V)
2.0
0 10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
3.5
2.6
0
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
OUTPUT (mV)
VIN = VOUT + 1V
IL = 100∝A
IL = 1mA
LOAD (mA)
500
4.0
100
Ground Current
vs. Output Current
1000
0
200
0.1
1
10
100
OUTPUT CURRENT (mA)
1500
CIN = 10∝F
COUT = 1∝F
IL = 80mA
GROUND CURRENT (mA)
2000
300
Dropout
Characteristics
4
3.5
MIN. SUPPLY VOLTAGE (V)
10
1
0.01
GROUND CURRENT (∝A)
DROPOUT VOLTAGE (mV)
100
OUTPUT CURRENT (mA)
DROPOUT VOLTAGE (mV)
CIN = 10∝F
COUT = 1∝F
Dropout Voltage
vs. Temperature
400
OUTPUT VOLTAGE (V)
Dropout Voltage
vs. Output Current
1000
CL = 1∝F
2
4 6 8 10 12 14 16
TIME (ms)
Minimum Supply Voltage
vs. Temperature
IL = 1mA
VOUT = 3.3V
3.4
CIN = 10∝F
COUT = 1∝F
3.3
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
M9999-111909
Micrel, Inc.
MIC5203
2
-0.2 0.0
0.2 0.4 0.6
TIME (ms)
0.8
20
0
1.0
INPUT (V)
IL = 100∝A
CL = 1∝F
VIN = VOUT + 1
80
60
40
0
FREQUENCY (Hz)
2
0
November 2009
2
4
6
TIME (∝s)
8
OUTPUT (V)
ENABLE (V)
1x106
100x103
10x103
Enable Characteristics
(3.3V Version)
CL = 1∝F
IL = 100∝A
2
0
-2
-0.2 0.0
10
Enable Voltage
vs. Temperature
CIN = 10∝F
COUT = 1∝F
IL = 1mA
1.25
1.00
VON
VOFF
0.75
0.50
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
7
40
ENABLE CURRENT (∝A)
ENABLE VOLTAGE (mV)
OUTPUT (V)
ENABLE (V)
1.50
CL = 1∝F
IL = 100∝A
0
5
4
3
2
1
0
4
-1
0.2 0.4 0.6
TIME (ms)
0.8
1.0
FREQUENCY (Hz)
Enable Characteristics
(3.3V Version)
-2
-2
IL = 100mA
0.1
FREQUENCY (Hz)
4.0
3.0
2.0
1.0
0.0
4
-1.0
IL = 1mA
1
0.01
1x106
100x103
10x100
0
10x103
20
1x103
IL = 50mA
CL = 1∝F
VIN = VOUT + 1
1x100
40
10
IL = 100∝A
1x103
60
100
Output Impedance
100x100
OUTPUT IMPEDANCE ( )
80
100x100
RIPPLE VOLTAGE (dB)
1000
10x100
Ripple Voltage
vs. Frequency
IL = 1mA
CL = 1∝F
VIN = VOUT + 1
20
FREQUENCY (Hz)
100
1.0
1x106
4
40
0.8
Ripple Voltage
vs. Frequency
100
60
0.2 0.4 0.6
TIME (ms)
100x103
6
Ripple Voltage
vs. Frequency
80
10x100
INPUT (V)
-1
8
2
-0.2 0.0
20
10x103
0
15
4
1x103
CL = 11∝F
IL = 1mA
1
5
10
TIME (ms)
6
100x100
100
0
CL = 1∝F
IL = 1mA
10x10
8
Line Transient
3
2
1
0
-1
8
-2
0
6 7
Line Transient
2
OUTPUT (V)
2 3 4 5
TIME (ms)
RIPPLE VOLTAGE (dB)
1
1x106
-50
-1 0
0
-50
-5
100x103
0
50
10x103
50
COUT = 10∝F
VIN = VOUT + 1
-100
100
-200
OUTPUT (mA)
OUTPUT (mA)
-400
100
0
1x103
COUT = 1∝F
VIN = VOUT + 1
-200
Load Transient
100x100
0
100
OUTPUT (V)
OUTPUT (mV)
Load Transient
200
RIPPLE VOLTAGE (dB)
OUTPUT (mV)
Typical Characteristics (continued)
Enable Current
vs. Temperature
CIN = 10∝F
COUT = 1∝F
IL = 1mA
30
20
10
VEN = 5V
VEN = 2V
0
-60 -30 0 30 60 90 120 150
TEMPERATURE °C)
(
M9999-111909
Micrel, Inc.
MIC5203
Applications Information
Input Capacitor
A 0.1µF capacitor should be placed from IN to GND if
there is more than 10 inches of wire between the input
and the AC filter capacitor or when a battery is used as
the input.
No-Load Stability
The MIC5203 will remain stable and in regulation with no
load (other than the internal voltage divider) unlike many
other voltage regulators. This is especially important in
CMOS RAM keep-alive applications.
Output Capacitor
Typical PNP based regulators require an output
capacitor to prevent oscillation. The MIC5203 is
ultrastable, requiring only 0.47µF of output capacitance
for stability. The regulator is stable with all types of
capacitors, including the tiny, low-ESR ceramic chip
capacitors. The output capacitor value can be increased
without limit to improve transient response.
The capacitor should have a resonant frequency above
500kHz. Ceramic capacitors work, but some dielectrics
have poor temperature coefficients, which will affect the
value of the output capacitor over temperature. Tantalum
capacitors are much more stable over temperature, but
typically are larger and more expensive. Aluminum
electrolytic capacitors will also work, but they have
electrolytes that freeze at about –30°C. Tantalum or
ceramic capacitors are recommended for operation
below –25°C.
Enable Input
The MIC5203 features nearly zero off-mode current.
When EN (enable input) is held below 0.6V, all internal
circuitry is powered off. Pulling EN high (over 2.0V) reenables the device and allows operation. EN draws a
small amount of current, typically 15µA. While the logic
threshold is TTL/CMOS compatible, EN may be pulled
as high as 20V, independent of VIN.
November 2009
8
M9999-111909
Micrel, Inc.
MIC5203
Package Information
SOT-143 (M4)
November 2009
9
M9999-111909
Micrel, Inc.
MIC5203
Package Information (continued)
SOT-23-5 (M5)
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
The 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.
November 2009
10
M9999-111909