Micrel, Inc.
Ordering Information
MIC3291
Part Number 1
MIC3291-18YD6
MIC3291-25YD6
MIC3291-18YML
MIC3291-25YML
Marking Code 4
W18F
W25F
WA F
WB F
Output Voltage
Adjustable
Adjustable
Adjustable
Adjustable
Over-Voltage
Protection
18V
25V
18V
25V
Junction
Temperature Range
? 40 ° C to + 125 ° C
? 40 ° C to + 125 ° C
? 40 ° C to + 125 ° C
? 40 ° C to + 125 ° C
Package 2,3
TSOT23-6
TSOT23-6
2mm × 2mm MLF ?
2mm × 2mm MLF ?
Notes:
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
1.
2.
Other options available. Contact Micrel Marketing for details.
?
MLF
3.
?
● = Pin 1 identifier.
4.
Overbar ( ˉ )and Underbar symbols ( _ ) may not be to scale.
Pin Configuration
2mm × 2mm 8-Pin MLF ? (ML)
(Top View)
Pin Description
TSOT23-6 (D6)
(Top View)
8-pin MLF
Pin Number
?
1
2
3
4
5
6
7
8
Pad
September 2010
Pin Number
SOT23-6
6
5
4
?
?
3
1
2
?
Pin Name
OUT
VIN
DC
GND
NC
FB
SW
GND
GND
Pin Name
Output and over-voltage protection (output)
Supply (Input): 2.5V to 6.5V for internal circuitry.
Single pin digital control. See diagrams.
Ground (Return): Ground.
No connect (no internal connection to die)
Feedback (Input): Output voltage sense node. Connect the cathode of the LED
to this pin.
Switch Node (Input): Internal power BIPOLAR collector.
Ground (Return): Ground.
Ground (Return): Backside pad.
2
M9999-092810
(408) 944-0800
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