MIC5203 [MICREL]
レCap⑩ 80mA Low-Dropout Voltage Regulator; レCap⑩ 80毫安低压差稳压器
| 型号： | MIC5203 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | レCap⑩ 80mA Low-Dropout Voltage Regulator |
| 文件： | 总7页 (文件大小：84K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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.
• 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
The µCap™ regulator design is optimized to work with low-
value, low-cost ceramic capacitors. The outputs typically
require only 0.47µF of output capacitance for stability.
Designedespeciallyforhand-held,battery-powereddevices,
theMIC5203canbecontrolledbyaCMOSorTTLcompatible
logicsignal.Whendisabled,powerconsumptiondropsnearly
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
prolongingbatterylife. KeyMIC5203featuresincludecurrent
limiting, overtemperature shutdown, and protection against
reversed battery.
• Logic-controlled shutdown
• Stability with low-ESR ceramic capacitors
3
Applications
• 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
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.
Typical Applications
Ordering Information
Part Number
Marking Voltage
Junction Temp. Range
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
–40°C to +125°C
Package
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-143
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Enable
Shutdown
MIC5203-3.0BM4
MIC5203-3.3BM4
MIC5203-3.6BM4
MIC5203-3.8BM4
MIC5203-4.0BM4
MIC5203-4.5BM4
MIC5203-4.7BM4
MIC5203-5.0BM4
MIC5203-2.8BM5
MIC5203-3.0BM5
MIC5203-3.3BM5
MIC5203-3.6BM5
MIC5203-3.8BM5
MIC5203-4.0BM5
MIC5203-4.5BM5
MIC5203-4.7BM5
MIC5203-5.0BM5
LA30
LA33
LA36
LA38
LA40
LA45
LA47
LA50
LA28
LK30
LK33
LK36
LK38
LK40
LK45
LK47
LK50
3.0V
3.3V
3.6V
3.8V
4.0V
4.5V
4.75V
5.0V
2.8V
3.0V
3.3V
3.6V
3.8V
4.0V
4.5V
4.75V
5.0V
LAxx
VOUT
0.47µF
SOT-143 Version
1
2
3
5
4
VOUT
0.47µF
Enable
Shutdown
SOT-23-5 Version
Other voltages available. Contact Micrel for details.
December 1998
3-141
MIC5203
Micrel
Pin Configuration
EN
2
GND
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
Pin Function
1
2
2
3
GND
EN
Ground
Enable (Input): TTL/CMOS compatible control input. Logic high = enabled;
logic low or open = shutdown.
3
4
1
4
5
IN
NC
Supply Input
Not internally connected.
Regulator Output
OUT
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Input Supply Voltage (V ) ............................ –20V to +20V
Input Voltage (V ) ........................................... 2.5V to 16V
IN
IN
Enable Input Voltage (V ) ........................... –20V to +20V
Enable Input Voltage (V ) .................................. 0V to V
EN
EN
IN
Power Dissipation (P ) ............................ Internally Limited
Junction Temperature Range................... –40°C to +125°C
D
Storage Temperature Range (T ) ............ –60°C to +150°C
Thermal Resistance (θ )......................................... Note 3
S
JA
Lead Temperature (Soldering, 5 sec.) ...................... 260°C
3-142
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
Min
Typ
Max
Units
VO
Output Voltage Accuracy
–3
–4
3
4
%
%
∆VO/∆T
∆VO/VO
Output Voltage Temp. Coefficient
Line Regulation
Note 4
50
200 ppm/°C
VIN = VOUT + 1V to 16V
0.008
0.3
%
%
0.5
∆VO/VO
Load Regulation
IL = 0.1mA to 80mA, Note 5
0.08
0.3
0.5
%
%
VIN–VO
Dropout Voltage, Note 6
IL = 100µA
IL = 20mA
IL = 50mA
IL = 80mA
20
200
250
300
0.01
180
225
850
1800
200
180
0.05
mV
mV
mV
mV
µA
350
600
IQ
Quiescent Current
VEN ≤ 0.4V (shutdown)
10
IGND
Ground Pin Current, Note 7
IL = 100µA, VEN ≥ 2.0V (active)
IL = 20mA, VEN ≥ 2.0V (active)
IL = 50mA, VEN ≥ 2.0V (active)
IL = 80mA, VEN ≥ 2.0V (active)
VIN = VOUT(nominal) – 0.5V, Note 7
VOUT = 0V
µA
750
µA
3
µA
3000
300
µA
IGNDDO
ILIMIT
∆VO/∆PD
Enable Input
VIL
Ground Pin Current at Dropout
Current Limit
µA
250
mA
%/W
Thermal Regulation
Note 8
Enable Input Voltage Level
Enable Input Current
logic Low (off)
logic high (on)
0.6
µA
µA
µA
µA
VIH
2.0
IIL
V
IL ≤ 0.6V
IH ≥ 2.0V
0.01
15
1
IIH
V
50
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 T (ambient temperature) is P
= (T
– T ) ÷ θ . Exceeding the maximum
A
D(max)
J(max) A JA
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θ is 250°C/W for
JA
the SOT-143 and 220°C/W for the SOT-23-5 mounted on a printed circuit board.
Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 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.
Note 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.
Note 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.
Note 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 V = 16V for t = 10ms.
IN
December 1998
3-143
MIC5203
Micrel
Typical Characteristics
Dropout Voltage
vs. Output Current
Dropout Voltage
vs. Temperature
Dropout
Characteristics
1000
400
300
200
100
0
4
3
2
1
0
CIN = 10µF
COUT = 1µF
CIN = 10µF
COUT = 1µF
IL = 100µA
100
10
1
IL = 80mA
IL = 80mA
IL = 100µA
IL = 1mA
CIN = 10µF
COUT = 1µF
0.01
0.1
1
10
100
-60 -30
0
30 60 90 120 150
0
1
2
3
4
5
6
7
OUTPUT CURRENT (mA)
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Ground Current
vs. Output Current
Ground Current
vs. Supply Voltage
Ground Current
vs. Temperature
2000
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.0
1.5
1.0
0.5
0.0
CIN = 10µF
COUT = 1µF
IL = 50mA
1500
1000
500
0
IL = 80mA
VOUT = 3.3V
IL = 100µA
IL = 50mA
IL = 100µA
VIN = VOUT + 1V
0
10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
-60 -30
0
30 60 90 120 150
0
1
2
3
4
5
6
7
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
Output Voltage
vs. Output Current
Short Circuit Current
vs. Input Voltage
Thermal Regulation
(3.3V Version)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
160
140
120
100
80
60
40
20
0
-20
-40
1-060
CIN = 10µF
COUT = 1µF
60
50
0
CIN = 10µF
COUT = 1µF
40
20
CL = 1µF
0
-50
0
50
100
150
200
0
1
2
3
4
5
6
7
-2
0
2
4
6
8
10 12 14 16
OUTPUT CURRENT (mA)
INPUT VOLTAGE (V)
TIME (ms)
Output Voltage
vs. Temperature
Short Circuit Current
vs. Temperature
Minimum Supply Voltage
vs. Temperature
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
200
180
160
140
120
100
3.5
3.4
3.3
CIN = 10µF
COUT = 1µF
IL = 1mA
V
= 3.3V
OUT
CIN = 10µF
COUT = 1µF
3 DEVICES
HI / AVG / LO
CIN = 10µF
COUT = 1µF
CURVES APPLICABLE
AT 100µA AND 50mA
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
3-144
December 1998
MIC5203
Micrel
Load Transient
Load Transient
Load Transient
200
200
0
100
0
0
-200
-2400
COUT = 10µF
VIN = VOUT + 1
COUT = 1µF
VIN = VOUT + 1
-200
-1400
50
-100
-1200
50
Awaiting Further
Characterization
Data
COUT = 0.1µF
VIN = VOUT + 1
0
0
0
-50
-1
-50
-5
-1
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
0
5
10
15
20
TIME (ms)
TIME (ms)
TIME (ms)
Line Transient
Line Transient
Line Transient
3
2
3
2
2
1
CL = 1µF
IL = 1mA
CL = 11µF
IL = 1mA
1
1
0
0
0
3
Awaiting Further
Characterization
Data
-1
-32
2
-1
-82
-81
6
6
4
2
1
CL = 0.1µF
IL = 1mA
0
4
-1
-2
2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
100
100
100
80
60
40
20
0
80
60
40
20
0
80
60
40
20
0
Awaiting Further
Characterization
Data
Awaiting Further
Characterization
Data
Awaiting Further
Characterization
Data
IL = 100µA
L = 0.1µF
IN = VOUT + 1
IL = 1mA
L = 0.1µF
IN = VOUT + 1
IL = 50mA
CL = 0.1µF
IN = VOUT + 1
C
C
V
V
V
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
Ripple Voltage
vs. Frequency
100
80
60
40
20
0
100
80
60
40
20
0
100
80
60
40
20
0
IL = 100µA
CL = 1µF
VIN = VOUT + 1
IL = 1mA
CL = 1µF
VIN = VOUT + 1
IL = 50mA
CL = 1µF
VIN = VOUT + 1
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
December 1998
3-145
MIC5203
Micrel
Enable Characteristics
(3.3V Version)
Enable Characteristics
(3.3V Version)
Output Impedance
5
4
3
2
1
4.0
3.0
2.0
1.0
0.0
-1.40
1000
100
10
IL = 100µA
IL = 1mA
Awaiting Further
Characterization
Data
Awaiting Further
Characterization
Data
0
-41
1
2
0
2
0
IL = 100mA
CL = 0.1µF
IL = 100µA
CL = 0.1µF
IL = 100µA
0.1
0.01
-2
-2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
-2
0
2
4
6
8
10
TIME (µs)
FREQUENCY (Hz)
Enable Characteristics
Enable Characteristics
(3.3V Version)
(3.3V Version)
5
4.0
3.0
2.0
1.0
0.0
-1.40
4
3
2
1
0
CL = 1µF
IL = 100µA
CL = 1µF
IL = 100µA
-41
2
0
2
0
-2
-2
-2
-0.2 0.0 0.2 0.4 0.6 0.8 1.0
TIME (ms)
0
2
4
6
8
10
TIME (µs)
Enable Voltage
vs. Temperature
Enable Current
vs. Temperature
1.50
40
30
20
10
0
CIN = 10µF
COUT = 1µF
IL = 1mA
CIN = 10µF
COUT = 1µF
IL = 1mA
1.25
1.00
0.75
0.50
VEN = 5V
VON
VOFF
VEN = 2V
-60 -30
0
30 60 90 120 150
-60 -30
0
30 60 90 120 150
TEMPERATURE (°C)
TEMPERATURE (°C)
3-146
December 1998
MIC5203
Micrel
will also work, but they have electrolytes that freeze at about
–30C°. Tantalum or ceramic capacitors are recommended
for operation below –25C°.
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
TheMIC5203willremainstableandinregulationwithnoload
(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
preventoscillation.TheMIC5203isultrastable,requiringonly
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.
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,
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
independent of V .
IN
3
December 1998
3-147
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