MIC39300/39301/39302
3A Low-Voltage Low-Dropout Regulator
FEATURES
3A minimum guaranteed output current
500mV typical dropout at 3A
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V or 1.5V conversion
1% initial accuracy
Low ground current
Current limiting and thermal shutdown
Reversed-battery protection
Reversed-leakage protection
Fast transient response
TTL/CMOS compatible enable pin => MIC39301
Error flag output - MIC39301 only
Adjustable version - MIC39302 only
TO-263 and TO-220 packaging
Moisture Sensitivity Level 3
TO263-3L / TO220-3L
(MIC39300-x.x Fixed only)
1
3
1. In
2. Gnd
3. Out
1
3
TO263-5L / TO220-5L
(MIC39301-x.x & MIC39302 only)
1
5
1.
2.
3.
4.
5.
En
In
Gnd
Out
Flg or Adj
1
5
APPLICATIONS
LDO linear regulator for PC add-in cards
High-efficiency linear power supplies
Multimedia and PC processor supplies
SMPS post regulator
Low-voltage microcontrollers
StrongARM™ processor supply
PIN DESCRIPTION
CMOS-compatible control input.
Enable
(Input)
IN
GND
OUT
FLG
ADJ
Logic high = enable, logic
Logic low or open = Shutdown
Supply (Input): +16V maximum supply
Ground pin and TAB are internally connected.
Regulator Output
Flag (Output): Open-collector error flag output.
Adjustment Input: Feedback input.
ORDERING INFORMATION
DESCRIPTION
The MIC39300,MIC39301 and MIC39302 are 3.0A
low-dropout linear voltage regulators that provide
a low voltage, high-current output with a
minimum of external components.
The MIC39300/1 offers extremely low dropout
(typically 400mV at 3.0A) and low ground current
(typically 36mA at 3.0A).
Device
MIC39300S- X.X
MIC39300T-X.X
MIC39301S-X.X
MIC39301T-X.X
MIC39302S-Adj
MIC39302T-Adj
Marking
MIC39300-X.X
MIC39300-X.X
MIC39301-X.X
MIC39301-X.X
MIC39302
MIC39302
Package
TO-263
TO-220
TO-263
TO-220
TO-263
TO-220
* X.X = Fixed Vout = 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
The MIC39300/1/2 is ideal for PC add-in cards that need to convert from standard 5V or 3.3V down to
new, lower core voltages. A guaranteed maximum dropout voltage of 500mV over all operating conditions
allows the MIC39300/1/2 to pro-vide 2.5V from a supply as low as 3V.
The MIC39300/1/2 also has fast transient response for heavy switching applications.The device requires
only 47F of output capacitance to maintain stability and achieve fast transient responseThe MIC39300/1 is
fully protected with over current limiting,thermal shutdown, reversed-battery protection, reversed-leakage
protection, and reversed-lead insertion. The MIC39301 offers a TTL-logic compatible enable pin and an
error flag that indicates under voltage and over current conditions. Offered in fixed voltages, the
MIC39300/1/2 comesin the TO-220 and TO-263 packages and is an ideal upgrade to older, NPN-based
linear voltage regulators.
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2018 AUG
MIC39300/39301/39302
Typical Application Circuit
MIC39300
MIC39301
MIC39302
Absolute Maximum Ratings (Note 1)
Supply Voltage (VIN) : –20V to +20V
Enable Voltage (VEN) : +20V
Storage Temperature (TS) : –65°C to +150°C
Lead Temperature (soldering, 5 sec) : 260°C
ESD,
Note 3
Operating Ratings (Note 2)
Supply Voltage (VIN) : +2.25V to +16V
Enable Voltage (VEN) : +16V
Maximum Power Dissipation (PD(max))
Note 4
Junction Temperature (TJ) : –40°C to +125°C
Package Thermal Resistance
TO-263(θ
JC
) : 5°C/W
TO-220(θ
JC
) : 2°C/W
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2018 AUG
MIC39300/39301/39302
Note
Note
Note
Note
Note
Note
Note
Note
Note
1. Exceeding the absolute maximum ratings may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. P
D(max)
= (T
J(max)
– T
A
)
θ
JA
, where
θ
JA
depends upon the printed circuit layout. See “Applications Information.”
5.Vout temperature coefficient is ∆V
OUT(worst case)
(T
J(max)
– T
J(min)
) where T
J(max)
is +125℃ and T
J(min)
is 0℃
6. V
DO
= V
IN
– V
OUT
when V
OUT
decreases to 99% of its nominal output voltage with V
IN
= V
OUT
+ 1V.
7. I
GND
is the quiescent current. IIN = I
GND
+ I
OUT
.
8. V
EN
0.8V, V
IN
8V, and V
OUT
= 0V
9. For a 2.5V device, V
IN
= 2.250V (device is in dropout).
Note 10.VREF ≤ VOUT ≤ (VIN – 1V), 2.25V ≤ VIN ≤ 16V, 10mA ≤ IL ≤ 3A, TJ = TMAX.
TYPICAL PERFORMANCE CHARACTERISTICS
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2018 AUG
模拟与混合信号
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