Micrel MIC5203-3.3BM5 μcap⠢ 80ma low-dropout voltage regulator Datasheet

MIC5203
Micrel
MIC5203
µCap™ 80mA Low-Dropout Voltage 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.
The µCap™ 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 3-terminal 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; contact Micrel for details.
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Typical Applications
Part Number
Voltage
Junction Temp. Range
Package
LA30
3.0V
–40°C to +125°C
SOT-143
MIC5203-3.3BM4
LA33
3.3V
–40°C to +125°C
SOT-143
MIC5203-3.6BM4
LA36
3.6V
–40°C to +125°C
SOT-143
MIC5203-3.8BM4
LA38
3.8V
–40°C to +125°C
SOT-143
MIC5203-4.0BM4
LA40
4.0V
–40°C to +125°C
SOT-143
MIC5203-4.5BM4
LA45
4.5V
–40°C to +125°C
SOT-143
MIC5203-4.7BM4
LA47
4.75V
–40°C to +125°C
SOT-143
MIC5203-5.0BM4
LA50
5.0V
–40°C to +125°C
SOT-143
MIC5203-2.8BM5
LA28
2.8V
–40°C to +125°C
SOT-23-5
MIC5203-3.0BM5
LK30
3.0V
–40°C to +125°C
SOT-23-5
VOUT
MIC5203-3.3BM5
LK33
3.3V
–40°C to +125°C
SOT-23-5
0.47µF
MIC5203-3.6BM5
LK36
3.6V
–40°C to +125°C
SOT-23-5
MIC5203-3.8BM5
LK38
3.8V
–40°C to +125°C
SOT-23-5
MIC5203-4.0BM5
LK40
4.0V
–40°C to +125°C
SOT-23-5
MIC5203-4.5BM5
LK45
4.5V
–40°C to +125°C
SOT-23-5
MIC5203-4.7BM5
LK47
4.75V
–40°C to +125°C
SOT-23-5
MIC5203-5.0BM5
LK50
5.0V
–40°C to +125°C
SOT-23-5
SOT-143 Version
3
LKxx
Enable
Shutdown
4
SOT-23-5 Version
Cellular telephones
Laptop, notebook, and palmtop computers
Battery-powered equipment
Bar code scanners
SMPS post-regulator/dc-to-dc modules
High-efficiency linear power supplies
Marking
VOUT
0.47µF
2
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MIC5203-3.0BM4
LAxx
5
Other voltages available. Contact Micrel for details.
December 1998
3
Applications
Ordering Information
Enable
Shutdown
1
Tiny 4-lead and 5-lead surface-mount packages
Wide Selection of output voltages
Guaranteed 80mA output
Low quiescent current
Low dropout voltage
Tight load and line regulation
Low temperature coefficient
Current and thermal limiting
Reversed input polarity protection
Zero off-mode current
Logic-controlled shutdown
Stability with low-ESR ceramic capacitors
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MIC5203
Micrel
Pin Configuration
EN
GND
2
1
Part
Identification
LAxx
3
4
IN
OUT
SOT-143 (M4)
EN GND IN
3
2
1
LKxx
4
5
NC
OUT
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
Pin Function
Ground
Regulator Output
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Input Supply Voltage (VIN) ............................ –20V to +20V
Enable Input Voltage (VEN) ........................... –20V to +20V
Power Dissipation (PD) ............................ Internally Limited
Storage Temperature Range (TS) ............ –60°C to +150°C
Lead Temperature (Soldering, 5 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
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December 1998
MIC5203
Micrel
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
Conditions
VO
Output Voltage Accuracy
∆VO/∆T
Output Voltage Temp. Coefficient
Note 4
∆VO/VO
Line Regulation
∆VO/VO
VIN–VO
Min
Typ
Max
Units
3
4
%
%
50
200
ppm/°C
VIN = VOUT + 1V to 16V
0.008
0.3
0.5
%
%
Load Regulation
IL = 0.1mA to 80mA, Note 5
0.08
0.3
0.5
%
%
Dropout Voltage, Note 6
IL = 100µA
20
IL = 20mA
200
IL = 50mA
250
IL = 80mA
300
600
mV
10
µA
–3
–4
mV
350
mV
mV
IQ
Quiescent Current
VEN ≤ 0.4V (shutdown)
0.01
IGND
Ground Pin Current, Note 7
IL = 100µA, 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
µA
µA
750
µA
µA
IGNDDO
Ground Pin Current at Dropout
VIN = VOUT(nominal) – 0.5V, Note 7
200
300
µA
ILIMIT
Current Limit
VOUT = 0V
180
250
mA
∆VO/∆PD
Thermal Regulation
Note 8
0.05
Enable Input Voltage Level
logic Low (off)
%/W
Enable Input
VIL
VIH
IIL
logic high (on)
Enable Input Current
IIH
0.6
µA
µA
2.0
VIL ≤ 0.6V
0.01
1
µA
VIH ≥ 2.0V
15
50
µA
Note 1.
Exceeding the absolute maximum rating may damage the device.
Note 2.
The device is not guaranteed to function outside its operating rating.
Note 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.
Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
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.
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.
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.
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.
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
December 1998
3-143
3
MIC5203
Micrel
Typical Characteristics
0
3.0
2.5
OUTPUT VOLTAGE (V)
CIN = 10µF
COUT = 1µF
2.0
1.5
1.0
0.5
3.6
0
50
100
150
200
OUTPUT CURRENT (mA)
Output Voltage
vs. Temperature
CIN = 10µF
COUT = 1µF
3.4
3.2
3.0
2.8
2.6
SHORT CIRCUIT CURRENT (mA)
OUTPUT VOLTAGE (V)
3.5
3 DEVICES
HI / AVG / LO
CURVES APPLICABLE
AT 100µA AND 50mA
2.4
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
GROUND CURRENT (mA)
1.0
0.5
0.0
10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
VOUT = 3.3V
IL = 100µA
0
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
120
100
80
60
CIN = 10µF
COUT = 1µF
40
20
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
CIN = 10µF
COUT = 1µF
2.5
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
160
CIN = 10µF
COUT = 1µF
120
100
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
7
Ground Current
vs. Temperature
CIN = 10µF
COUT = 1µF
IL = 80mA
1.5
1.0
IL = 50mA
0.5
IL = 100µA
Thermal Regulation
(3.3V Version)
50
0
CL = 1µF
-50
-2 0
Short Circuit Current
vs. Temperature
3-144
0
2.0
60
40
20
0
-20
-40
-60
100
7
180
140
1
0.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
7
140
200
IL = 80mA
Short Circuit Current
vs. Input Voltage
160
0
2
3.0
IL = 50mA
1.5
IL = 100µA
3
0
Ground Current
vs. Supply Voltage
2.0
Output Voltage
vs. Output Current
4.0
3.8
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
∆ OUTPUT (mV)
VIN = VOUT + 1V
IL = 100µA
IL = 1mA
LOAD (mA)
500
4.0
100
GROUND CURRENT (mA)
1000
0.0
200
0.1
1
10
100
OUTPUT CURRENT (mA)
1500
0
IL = 80mA
Ground Current
vs. Output Current
2000
CIN = 10µF
COUT = 1µF
300
Dropout
Characteristics
4
3.5
MIN. SUPPLY VOLTAGE (V)
10
1
0.01
GROUND CURRENT (µA)
DROPOUT VOLTAGE (mV)
100
OUTPUT CURRENT (mA)
DROPOUT VOLTAGE (mV)
CIN = 10µF
COUT = 1µF
Dropout Voltage
vs. Temperature
400
OUTPUT VOLTAGE (V)
Dropout Voltage
vs. Output Current
1000
2
4 6 8 10 12 14 16
TIME (ms)
Minimum Supply Voltage
vs. Temperature
IL = 1mA
VOUT = 3.3V
3.4
CIN = 10µF
COUT = 1µF
3.3
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
December 1998
Micrel
100
December 1998
60
Awaiting Further
Characterization
Data
40
0
1x106
IL = 50mA
20 CL = 0.1µF
VIN = VOUT + 1
Ripple Voltage
vs. Frequency
3-145
80
60
20
0
IL = 50mA
CL = 1µF
VIN = VOUT + 1
FREQUENCY (Hz)
1x106
40
100x103
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
1x106
100x103
10x103
IL = 1mA
CL = 1µF
VIN = VOUT + 1
1x103
0
Ripple Voltage
vs. Frequency
100
100x100
20
1.0
FREQUENCY (Hz)
60
40
0.8
100x103
IL = 1mA
CL = 0.1µF
VIN = VOUT + 1
80
0.2 0.4 0.6
TIME (ms)
10x103
Awaiting Further
Characterization
Data
80
10x100
RIPPLE VOLTAGE (dB)
FREQUENCY (Hz)
1x106
100x103
10x103
1x103
10x100
IL = 100µA
CL = 1µF
VIN = VOUT + 1
100x100
RIPPLE VOLTAGE (dB)
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
60
0
4
2
-0.2 0.0
1.0
100
80
3
6
10x100
Ripple Voltage
vs. Frequency
CL = 11µF
IL = 1mA
0
FREQUENCY (Hz)
100
20
0.8
40
FREQUENCY (Hz)
40
0.2 0.4 0.6
TIME (ms)
80
20
20
Line Transient
1
INPUT (V)
4
0
1x106
100x103
10x103
IL = 100µA
CL = 0.1µF
VIN = VOUT + 1
15
8
-1
6
60
5
10
TIME (ms)
10x103
Awaiting Further
Characterization
Data
100x100
10x100
0
0
-1
100
2
0
1x103
Ripple Voltage
vs. Frequency
40
20
CL = 1µF
IL = 1mA
2
-0.2 0.0
1.0
80
60
-50
-5
8
10x100
0.8
7
0
RIPPLE VOLTAGE (dB)
0.2 0.4 0.6
TIME (ms)
6
50
Line Transient
1
10x100
100
INPUT (V)
CL = 0.1µF
IL = 1mA
0
-1
2 3 4 5
TIME (ms)
100
-200
8
-2
RIPPLE VOLTAGE (dB)
2
1
Awaiting Further
Characterization
Data
3
2
1
COUT = 10µF
VIN = VOUT + 1
-100
1x103
∆ OUTPUT (V)
1
0
-1
3
-2
-50
-1 0
8
0
1x106
7
100x103
6
Line Transient
-2
-0.2 0.0
RIPPLE VOLTAGE (dB)
2 3 4 5
TIME (ms)
1x103
INPUT (V)
3
2
1
0
10x103
0
-1 0
50
Load Transient
100x100
COUT = 0.1µF
VIN = VOUT + 1
100
-400
1x103
200
-400
COUT = 1µF
VIN = VOUT + 1
-200
100
100x100
Awaiting Further
Characterization
Data
0
100x100
-200
OUTPUT (mA) ∆ OUTPUT (mV)
0
Load Transient
200
∆ OUTPUT (V)
OUTPUT (mA) ∆ OUTPUT (mV)
Load Transient
200
∆ OUTPUT (V)
OUTPUT (mA) ∆ OUTPUT (mV)
MIC5203
MIC5203
Micrel
1
Awaiting Further
Characterization
Data
2
CL = 0.1µF
IL = 100µA
0
-2
-0.2 0.0
1x106
100x103
1x103
100x100
0.2 0.4 0.6
TIME (ms)
0.8
4.0
3.0
Enable Characteristics
(3.3V Version)
2.0
1.0
Awaiting Further
Characterization
Data
0.0
4
-1.0
2
CL = 0.1µF
IL = 100µA
0
-2
-2
1.0
0
2
4
6
TIME (µs)
8
10
OUTPUT (V)
CL = 1µF
IL = 100µA
Enable Characteristics
(3.3V Version)
2.0
CL = 1µF
IL = 100µA
1.0
0.0
4
-1.0
2
0
-2
-0.2 0.0
1.50
4.0
3.0
ENABLE (V)
5
4
3
2
1
0
4
-1
Enable Characteristics
(3.3V Version)
0.2 0.4 0.6
TIME (ms)
0.8
2
0
-2
-2
1.0
Enable Voltage
vs. Temperature
CIN = 10µF
COUT = 1µF
IL = 1mA
1.25
1.00
VOFF
VON
0.75
0.50
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
3-146
40
ENABLE CURRENT (µA)
ENABLE (V)
OUTPUT (V)
FREQUENCY (Hz)
ENABLE VOLTAGE (mV)
1x100
0.01
10x103
IL = 100mA
0.1
Enable Characteristics
(3.3V Version)
OUTPUT (V)
OUTPUT (V)
IL = 1mA
ENABLE (V)
10
IL = 100µA
10x100
OUTPUT IMPEDANCE (Ω)
100
5
4
3
2
1
0
4
-1
ENABLE (V)
Output Impedance
1000
0
2
4
6
TIME (µs)
10
Enable Current
vs. Temperature
CIN = 10µF
COUT = 1µF
IL = 1mA
30
20
10
8
VEN = 5V
VEN = 2V
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
December 1998
MIC5203
Micrel
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.
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
–30C°. Tantalum or ceramic capacitors are recommended
for operation below –25C°.
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.
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) re-enables 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.
3
December 1998
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