MIC2940A-3.3BT Micrel Inc, MIC2940A-3.3BT Datasheet - Page 8

• Manufacturer Part Number: MIC2940A-3.3BT
• Description: IC REG LDO 1.25A 3.3V TO220-3
• Manufacturer: Micrel Inc

Specifications of MIC2940A-3.3BT

• 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: Through Hole
• Package / Case: TO-220-3 (Straight Leads)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -

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