MIC5201
200 mA Low Dropout Regulator
Features
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High Output Voltage Accuracy
Variety of Output Voltages
Guaranteed 200 mA Output
Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current and Thermal Limiting
Reversed-Battery Protection
Load-Dump Protection (Fixed Voltage Versions)
Zero Off-Mode Current
Logic-Controlled Electronic Enable
Available in SOIC-8 and SOT-223 Packages
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
Battery Powered Equipment
PCMCIA V
CC
and V
PP
Regulation/Switching
Barcode Scanners
SMPS Post-Regulator and DC/DC Modules
High-Efficiency Linear Power Supplies
General Description
The MIC5201 is an efficient linear voltage regulator
with very low dropout voltage (typically 17 mV at light
loads and 200 mV at 100 mA), and very low ground
current (1 mA at 100 mA output), offering better than
1% initial accuracy with a logic compatible on-off
switching input.
Designed especially for hand-held battery powered
devices, the MIC5201 can be switched by a CMOS or
TTL compatible enable signal. This enable control may
be connected directly to V
IN
if unneeded. When
disabled, power consumption drops nearly to zero. The
ground current of the MIC5201 increases only slightly
in dropout, further prolonging battery life. Key MIC5201
features include current limiting, overtemperature
shutdown, and protection against reversed battery.
The MIC5201 is available in several fixed voltages and
accuracy configurations. It features the same pinout as
the LT1121 with better performance. Other options are
available; contact Microchip for details.
Applications
Package Types
MIC5201 (A
DJ
.)
8-Lead SOIC (M)
OUT
ADJ
GND
NC
1
2
3
4
8
7
6
5
IN
NC
NC
EN
OUT
NC
GND
MIC5201 (F
IXED
)
8-Lead SOIC (M)
1
2
3
4
8
7
6
5
IN
NC
NC
EN
MIC5201 (F
IXED
)
SOT-223 (S)
GND
TAB
NC
1
2
3
IN
GND OUT
2017 Microchip Technology Inc.
DS20005718A-page 1
MIC5201
Typical Application Circuit
MIC5201
ENABLE
SHUTDOWN
MIC5201-3.3
IN
EN
GND
1μF
OUT
V
OUT
3.3V
Functional Diagrams
F
IXED
R
EGULATOR
(SOT-223 V
ERSION
O
NLY
)
V
IN
IN
OUT
V
OUT
C
OUT
Bandgap
Ref.
Current-Limit
Thermal Shutdown
MIC5201-x.xYS
GND
F
IXED
R
EGULATOR
V
IN
IN
OUT
V
OUT
C
OUT
Bandgap
Ref.
V
REF
EN
Current-Limit
Thermal Shutdown
MIC5201-x.xYM
GND
A
DJUSTABLE
R
EGULATOR
V
IN
IN
OUT
V
OUT
C
OUT
ADJ
Bandgap
Ref.
V
REF
EN
Current-Limit
Thermal Shutdown
MIC5201YM [adj.]
GND
R1
R2
DS20005718A-page 2
2017 Microchip Technology Inc.
MIC5201
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Input Voltage (V
IN
) Fixed................................................................................................................. –20V to +60V
Supply Input Voltage (V
IN
) Adjustable......................................................................................................... –20V to +20V
Enable Input Voltage (V
EN
) Fixed ............................................................................................................... –20V to +60V
Enable Input Voltage (V
EN
) Adjustable ....................................................................................................... –20V to +20V
Power Dissipation (Note
1)
.................................................................................................................... Internally Limited
Operating Ratings ‡
Supply Input Voltage (V
IN
) Fixed................................................................................................................ +2.5V to +26V
Supply Input Voltage (V
IN
) Adjustable........................................................................................................ +2.5V to +16V
Enable Input Voltage (V
EN
) .................................................................................................................................0V to V
IN
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
Note 1:
The maximum allowable power dissipation is a function of the maximum junction temperature, T
J(max)
, the
junction-to-ambient thermal resistance,
θ
JA
, and the ambient temperature, T
A
. The maximum allowable
power dissipation at any ambient temperature is calculated using: P
(max)
= (T
J(max)
– T
A
) ÷
θ
JA
. Exceeding
the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go
into thermal shutdown.
2017 Microchip Technology Inc.
DS20005718A-page 3
MIC5201
TABLE 1-1:
ELECTRICAL CHARACTERISTICS (Note
1)
Electrical Characteristics:
V
IN
= V
OUT
+ 1V; I
L
= 100
μA;
C
L
= 3.3
μF;
V
EN
≥
2.0V; T
J
= +25°C,
bold
values indicate
–40°C
≤
T
J
≤
+85°C; unless noted.
Parameter
Output Voltage Accuracy
Output Voltage
Temperature Coefficient
Line Regulation, Fixed
Line Regulation,
Adjustable
Load Regulation
Symbol
V
O
∆V
O
/∆T
∆V
O
/∆V
O
∆V
O
/∆V
O
∆V
O
/∆V
O
Min.
–1
–2
—
—
—
—
—
—
—
—
—
Dropout Voltage,
Note 4
V
IN
– V
O
—
—
—
Quiescent Current
I
GND
—
—
—
Ground Pin Current
I
GND
—
—
—
Ripple Rejection
Ground Pin Current at
Dropout
Current Limit
Thermal Regulation
Output Noise
Enable Input
Input Voltage Level
Input Voltage Level
Enable Input Current
Enable Input Current
V
IL
V
IH
I
IL
I
IH
—
2.0
—
—
—
—
0.01
15
0.7
—
1
50
V
V
µA
µA
Logic-low (off)
Logic-high (on)
V
IL
≤
0.7V
V
IH
≤
2.0V
PSRR
I
GDNDO
I
LIMIT
∆V
O
/∆P
D
e
n
—
—
—
—
—
Typ.
—
—
40
0.004
—
0.004
—
0.04
—
17
130
180
225
270
0.01
130
270
500
1000
3000
75
270
280
0.05
100
Max.
1
2
150
0.20
0.40
0.20
0.40
0.16
0.30
—
—
—
—
400
—
—
400
—
2000
—
—
330
500
—
—
dB
µA
mA
%/W
µV
µA
µA
mV
Units
%
ppm/°C
%
%
%
Conditions
Variation from specified V
OUT
Note 2
V
IN
= V
OUT
+ 1V to 26V
V
IN
= V
OUT
+ 1V to 16V
I
L
= 0.1 mA to 200 mA,
Note 3
I
L
= 100 µA
I
L
= 20 mA
I
L
= 50 mA
I
L
= 100 mA
I
L
= 200 mA
V
ENABLE
≤
0.7V (shutdown)
I
L
= 100 µA
I
L
= 20 mA
I
L
= 50 mA
I
L
= 100 mA
I
L
= 200 mA
—
V
IN
= 0.5V less than specified V
OUT
,
I
L
= 100 µA,
Note 5
V
OUT
= 0V
Note 6
—
DS20005718A-page 4
2017 Microchip Technology Inc.
MIC5201
TABLE 1-1:
ELECTRICAL CHARACTERISTICS (Note
1)
(CONTINUED)
Electrical Characteristics:
V
IN
= V
OUT
+ 1V; I
L
= 100
μA;
C
L
= 3.3
μF;
V
EN
≥
2.0V; T
J
= +25°C,
bold
values indicate
–40°C
≤
T
J
≤
+85°C; unless noted.
Parameter
Symbol
Min.
1.223
1.217
—
Typ.
1.242
—
20
Max.
1.255
1.267
—
Units
Conditions
Reference (MIC5201 Adjustable Version Only)
Reference Voltage
Reference Voltage
Temperature Coefficient
Note 1:
2:
3:
V
REF
∆V
REF
/∆T
V
ppm/°C
—
—
4:
5:
6:
Specification for packaged product only. Devices are ESD sensitive. Handling precautions recommended.
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 0.1 mA to 200 mA. Changes in output voltage due to heat-
ing 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 dissipa-
tion is applied, excluding load or line regulation effects. Specifications are for a 200 mA load pulse at V
IN
=
26V for fixed and V
IN
= 16V for adjustable at t = 10 ms.
2017 Microchip Technology Inc.
DS20005718A-page 5
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