MIC39100/1/2
1A, Low Voltage, Low Dropout Regulator
with Reversed-Battery Protection
Features
• Fixed and Adjustable Output Voltages to 1.24V
• 410 mV Typical Dropout at 1A Load
- Best Recommended for 3.0V to 2.5V Conver-
sion
- Best Recommended for 2.5V to 1.8V Conver-
sion
• 1A Minimum Guaranteed Output Current
• 1% Initial Accuracy
• Low Ground Current
• Current-Limiting and Thermal-Shutdown
Protection
• Reversed-Battery and Reversed-Leakage
Protection
• Fast Transient Response
• Low Profile SOT-223 Package
• Power SO-8 Package
General Description
The MIC39100, MIC39101, and MIC39102 are 1A low
dropout linear voltage regulators that provide low
voltage, high current output from an extremely small
package. The MIC39100/1/2 offers extremely low
dropout (typically 410 mV at 1A) and low ground
current (typically 11 mA at 1A).
The MIC39100 is a
fixed
output regulator offered in the
SOT-223 package. The MIC39101 and MIC39102 are
fixed
and adjustable regulators, respectively, in a
thermally enhanced 8-lead SOIC package.
The MIC39100/1/2 is ideal for PC add-in cards that
need to convert from standard 5V to 3.3V, 3.3V to 2.5V,
or 2.5V to 1.8V. A guaranteed maximum dropout
voltage of 630 mV over all operating conditions allows
the MIC39100/1/2 to provide 2.5V from a supply as low
as 3.13V and 1.8V from a supply as low as 2.43V.
The MIC39100/1/2 is fully protected with overcurrent
limiting, thermal-shutdown, and reverse-battery
protection. Fixed voltages of 5.0V, 3.3V, 2.5V, and 1.8V
are available on MIC39100/1 with adjustable output
voltages to 1.24V on MIC39102.
Applications
•
•
•
•
•
•
LDO Linear Regulator for PC Add-In Cards
High-Efficiency Linear Power Supplies
SMPS Post Regulator
Multimedia and PC Processor Supplies
Battery Chargers
Low Voltage Microcontrollers and Digital Logic
Package Types
MIC39100-
XX
(F
IXED
)
SOT-223 (S)
(Top View)
MIC39101-
XX
(F
IXED
)
SOIC-8 (M)
(Top View)
MIC39102 (A
DJ
.)
SOIC-8 (M)
(Top View)
GND
TAB
EN 1
IN 2
OUT 3
8 GND
7 GND
6 GND
5 GND
EN 1
IN 2
OUT 3
ADJ 4
8 GND
7 GND
6 GND
5 GND
1
IN
2
3
GND OUT
FLG 4
2017 Microchip Technology Inc.
DS20005834A-page 1
MIC39100/1/2
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
IN
).................................................................................................................................... –20V to +20V
Enable Voltage (V
EN
) ................................................................................................................................................+20V
ESD Rating ............................................................................................................................................................
Note 1
Maximum Power Dissipation (P
D(MAX)
) ..................................................................................................................
Note 2
Operating Ratings ‡
Supply Voltage (V
IN
)................................................................................................................................. +2.25V to +16V
Enable Voltage (V
EN
) ................................................................................................................................................+16V
† 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:
Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in series
with 100 pF.
2:
P
D(MAX)
= (T
J(MAX)
– T
A
) ÷
θ
JA
, where
θ
JA
depends upon the printed circuit layout (see
Application Informa-
tion).
TABLE 1-1:
ELECTRICAL CHARACTERISTICS
Electrical Characteristics:
V
IN
= V
OUT
+ 1V; V
EN
= 2.25V; T
J
= +25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C,
unless noted.
Note 1
Parameter
Output Voltage
Line Regulation
Load Regulation
Output Voltage Temperature
Coefficient
Symbol
V
OUT
—
—
∆V
OUT
/
∆T
Min.
–1
–2
—
—
—
—
Dropout Voltage,
Note 3
V
DO
—
—
—
—
Ground Current,
Note 4
I
GND
—
—
—
Current Limit
Enable Input
Enable Input Voltage
V
EN
—
2.25
—
—
0.8
—
V
Logic LOW (Off)
Logic HIGH (On)
I
OUT(LIM)
—
Typ.
—
—
0.06
0.2
40
140
275
300
410
400
4
6.5
11
1.8
Max.
1
2
0.5
1
100
200
250
—
500
550
630
—
—
—
20
2.5
A
mA
µA
mV
%
%
%
ppm/°C
Units
Conditions
I
OUT
= 10 mA
10 mA
≤
I
OUT
≤
1A,
V
OUT
+1V
≤
V
IN
≤
8V
I
OUT
= 10 mA,
V
OUT
+ 1V
≤
V
IN
≤
16V
V
IN
= V
OUT
+ 1V,
10 mA
≤
I
OUT
≤
1A
Note 2
I
OUT
= 100 mA,
∆V
OUT
= –1%
I
OUT
= 500 mA,
∆V
OUT
= –1%
I
OUT
= 750 mA,
∆V
OUT
= –1%
I
OUT
= 1A,
∆V
OUT
= –1%
I
OUT
= 100 mA, V
IN
= V
OUT
+ 1V
I
OUT
= 500 mA, V
IN
= V
OUT
+ 1V
I
OUT
= 750 mA, V
IN
= V
OUT
+ 1V
I
OUT
= 1A, V
IN
= V
OUT
+ 1V
V
OUT
= 0V, V
IN
= V
OUT
+ 1V
DS20005834A-page 4
2017 Microchip Technology Inc.
MIC39100/1/2
TABLE 1-1:
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Characteristics:
V
IN
= V
OUT
+ 1V; V
EN
= 2.25V; T
J
= +25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C,
unless noted.
Note 1
Parameter
Symbol
Min.
1
Enable Input Current
I
EN
—
—
—
Flag Output
Output Leakage Voltage
Output Low Voltage
Low Threshold
High Threshold
Hysteresis
MIC39102 Only
1.228
Reference Voltage
—
1.215
1.203
Adjust Pin Bias Current
Reference Voltage
Temperature Coefficient
Adjust Pin Bias Current
Temperature Coefficient
Note 1:
2:
3:
—
—
—
—
—
—
1.240
—
40
20
0.1
1.252
1.265
1.277
80
120
—
—
nA
ppm/°C
nA/°C
V
I
OUT
= 10 mA
Note 6
—
—
—
V
FLG
I
FLG(LEAK)
Typ.
15
—
—
—
Max.
30
75
2
4
1
2
300
400
—
99.2
—
Units
Conditions
V
EN
= 2.25V
µA
V
EN
= 0.8V
—
—
93
—
—
0.01
210
—
—
1
µA
mV
V
OH
= 16V
V
IN
= 2.250V, I
OL
= 250 µA,
Note 5
% of V
OUT
V
FLG(DO)
%
% of V
OUT
—
4:
5:
6:
Specification for packaged product only.
Output voltage temperature coefficient is
∆V
OUT(WORST CASE)
÷ (T
J(MAX)
– T
J(MIN)
), where T
J(MAX)
=
+125°C and T
J(MIN)
= –40°C.
V
DO
= V
IN
– V
OUT
when V
OUT
decreases to 99% of its nominal output voltage with V
IN
= V
OUT
+ 1V. For
output voltages below 2.25V, dropout voltage is the input-to-output voltage differential with the minimum
input voltage being 2.25V. Minimum input operating voltage is 2.25V.
I
GND
is the quiescent current (I
IN
= I
GND
+ I
OUT
).
For a 2.5V device, V
IN
= 2.250V (device is in dropout).
V
REF
≤
V
OUT
≤
(V
IN
– 1V), 2.25V
≤
V
IN
≤
16V, 10 mA
≤
I
L
≤
1A, T
J
= T
MAX
.
2017 Microchip Technology Inc.
DS20005834A-page 5
PCB Design
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