MIC2940A-3.3WU Micrel Inc, MIC2940A-3.3WU Datasheet - Page 8
![IC REG LDO 1.25A 3.3V TO263](/photos/12/65/126560/576-to-263_sml.jpg)
MIC2940A-3.3WU
Manufacturer Part Number
MIC2940A-3.3WU
Description
IC REG LDO 1.25A 3.3V TO263
Manufacturer
Micrel Inc
Datasheet
1.MIC2941AWU_TR.pdf
(11 pages)
Specifications of MIC2940A-3.3WU
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 26V
Voltage - Dropout (typical)
0.4V @ 1.25A
Number Of Regulators
1
Current - Output
1.25A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
TO-263-3, D²Pak (3 leads + Tab), TO-263AA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Other names
576-1135
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC2940A-3.3WU
Manufacturer:
MICREL
Quantity:
20 000
Typical Applications
* Minimum Input-Output Voltage Ranges from 40mV to 400mV,
depending on Load Current.
Micrel, Inc.
July 2007
Figure 4. MIC2941A Wide Input Voltage Range
Figure 2. MIC2940A-5.0 Fixed +5V Regulator
GND
+V
+V IN
GND
V IN
V
IN
IN
ADJUST
Current Limit
V
V
OUT
OUT
+
V OUT = V IN
V
OUT
10µF
= 5V
8
Adjust Pin Low = Enable Output. Q1 ON = 3.3V, Q1 OFF = 5.0V.
ON
3.3V
V OUT = V R E F x (1 +
ON
SHUTDOWN
INPUT
Figure 5. MIC2941A 5.0V or 3.3V Selectable Regulator
S HUTDOWN
INPUT
Figure 3. MIC2941A Adjustable Regulator
OFF
5V
O F F
SHUTDOWN
GND
+5V to +7V
SHUTDOWN
+V IN
470 k
with Shutdown
GND AD JU S T
R
R
V
1
2
ADJ
OUT
+V
V
)
IN
IN
V
R E F
V
100pF
OUT
220k
1%
2N2222
1.23V
MIC2940A/2941A
300k
180k
1%
1%
M9999-071307
R 100
R
V
1
OUT
1.2V
2
pF
+
V CC OUT
10µF
22µF
26V