MIC2297 Micrel Semiconductor, MIC2297 Datasheet - Page 2

• Manufacturer Part Number: MIC2297
• Description: 40V PWM Boost Regulator White LED Driver
• Manufacturer: Micrel Semiconductor

Ordering Information
Pin Configuration
Pin Description
Micrel, Inc.
Mach 2008
MIC2297-15YML
MIC2297-42YML
* (
Part Number
) Top bar symbol after PI indicator identifying Pb-Free may not be to scale.
Pin Number
EPad
10
1
2
3
4
5
6
7
8
9
Mark Code*
S115
S142
Pin Name
COMP
PGND
AGND
GND
OVP
BRT
REF
VIN
SW
EN
FB
Voltage Protection
Output Over
COMP
PGND
OVP
VIN
EN
15V
42V
Pin Function
Ground (Return).
Over Voltage Protection (Input): Connect to the output to
clamp the maximum output voltage. A resistor divider from
this pin to ground could be used to raise the OVP level of
the 15V OVP option.
Supply (Input): Input voltage.
Enable (Input): Logic high enables regulator. Logic low shuts
down regulator.
Compensation Pin.
Analog Ground.
Brightness Control (Input): Either an analog (DAC) or filtered
PWM signal can be used. The gain equation is: VFB =
VBRT / 5. This pin should be left open if the brightness
function is not used. In that case, the FB will be set to its
default value of 200mV.
Reference Voltage (Output): This node is equal to the
voltage on the FB pin. A capacitor from REF to ground
should be used to filter the BRT voltage if PWM dimming is
implemented. A capacitor from REF to ground can also be
used to implement a soft-start function. This pin can be left
open if not used.
Feedback (Input): Output voltage sense node. Default value
is 200mV. Connect the cathode of the LED chain to this pin.
Connect current set resistor from this pin to ground.
Switch Node (Output): Internal power BIPOLAR collector.
Ground (Return): Backside pad.
1
2
3
4
5
–40°C to 125°C
–40°C to 125°C
2
Temp. Range
Junction
10 SW
9
8
7
6
FB
REF
BRT
AGND
10-Pin 2.5 x2.5 MLF
10-Pin 2.5 x2.5 MLF
Package
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®
®
Lead Finish
Pb-Free
Pb-Free
M9999-032708
MIC2297