MIC2291_11 Datasheet, PDF (2/10 Pages) Micrel Semiconductor – 1.2A PWM Boost Regulator Photo Flash LED Driver

Micrel, Inc.
Ordering Information
Part Number
MIC2291BD5
MIC2291YD5
MIC2291-15BML
Marking*
SSAA
SSAA
STA
Overvoltage
Protection
―
―
15
MIC2291-15YML
STA**
15
MIC2291-34BML
STC
34
MIC2291-34YML
STC**
34
Notes:
* Under bar / Over bar symbol may not be to scale.
** Over bar symbol located after Pin 1 identifier.
Junction
Temp. Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
5-Pin Thin SOT23
5-Pin Thin SOT23
8-Pin 2mm x 2mm MLF^®
8-Pin 2mm x 2mm MLF^®
8-Pin 2mm x 2mm MLF^®
8-Pin 2mm x 2mm MLF^®
MIC2291
Lead Finish
Standard
Pb-Free
Standard
Pb-Free
Standard
Pb-Free
Pin Configuration
FB GND SW
321
4
5
EN
VIN
5-Pin TSOT23 (D5)
OVP 1
VIN 2
EN 3
AGND 4
8 PGND
7 SW
6 FB
EP
5 NC
8-Pin 2mm x 2mm MLF^® (ML)
Pin Description
Pin Number
TSOT23-5
1
2
3
Pin Number
2x2 MLF-8
7
6
4
3
5
2
―
1
―
4
―
8
―
5
―
EP
Pin Name Pin Name
SW
GND
FB
EN
VIN
OVP
AGND
PGND
NC
GND
Switch node (Output): Internal power BIPOLAR collector.
Ground (Return): Ground.
Feedback (Input): Output voltage sense node. Connect the cathode
of the LED to this pin. Connect current set resistor from this pin to
ground.
Enable (Input): Logic high (≥1.5V) enables regulator. Logic low
(≤0.4V) shuts down regulator.
Supply (Input): Input Voltage.
Overvoltage protection (Input): Connect to the output to clamp the
maximum output voltage.
Analog ground. Internally connected to ground.
Power ground.
No connect (no internal connection to die).
Ground (Return): Exposed backside pad.
May 2007
2
M9999-051507