LM3444MMX/NOPB National Semiconductor, LM3444MMX/NOPB Datasheet - Page 2

• Manufacturer Part Number: LM3444MMX/NOPB
• Description: IC LED DRIVER AC-DC 10MSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM3444MMX/NOPB

• Constant Current: Yes
• Constant Voltage: Yes
• Internal Driver: No
• Type - Primary: General Purpose
• Type - Secondary: High Brightness LED (HBLED)
• Mounting Type: Surface Mount
• Topology: AC DC Offline Switcher, PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Frequency: Adjustable/Selectable
• Voltage - Supply: 8 V ~ 13 V
• Package / Case: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Operating Temperature: -

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Order Number
Connection Diagram
Ordering Information
LM3444MMX
Pin Descriptions
MSOP
LM3444MM
10
1
2
3
4
5
6
7
8
9
FILTER
PGND
Name
COFF
GATE
ISNS
V
NC
NC
NC
NC
CC
NOPB
NOPB
Spec.
Description
No internal connection. Leave this pin open.
No internal connection. Leave this pin open.
No internal connection. Leave this pin open.
OFF time setting pin. A user set current and capacitor connected from the output to this pin sets the constant
OFF time of the switching controller.
Filter input. A low pass filter tied to this pin can filter a PWM dimming signal to supply a DC voltage to control
the LED current. Can also be used as an analog dimming input. If not used for dimming connect a 0.1µF
capacitor from this pin to ground.
Circuit ground connection.
LED current sense pin. Connect a resistor from main switching MOSFET source, ISNS to GND to set the
maximum LED current.
Power MOSFET driver pin. This output provides the gate drive for the power switching MOSFET of the buck
controller.
Input voltage pin. This pin provides the power for the internal control circuitry and gate driver.
No internal connection. Leave this pin open.
Package Type
MSOP-10
MSOP-10
NSC Package
NS Package Numbers MUB10A
MUB10A
MUB10A
Drawing
10-Pin MSOP
Top View
2
Top Mark
SZTB
SZTB
30127573
1000 Units, Tape and Reel
3500 Units, Tape and Reel
Supplied As