LM3433SQ-36AEV/NOPB National Semiconductor, LM3433SQ-36AEV/NOPB Datasheet
LM3433SQ-36AEV/NOPB
Specifications of LM3433SQ-36AEV/NOPB
Available stocks
Related parts for LM3433SQ-36AEV/NOPB
LM3433SQ-36AEV/NOPB Summary of contents
Page 1
... V under-voltage lockout, and logic level shut- CC down mode. The LM3433 is available in a low profile LLP-24 package. Typical Application Circuit © 2008 National Semiconductor Corporation Features ■ Operating input voltage range of -9V to -14V w.r.t. LED anode ■ Control inputs are referenced to the LED anode ■ ...
Page 2
... Connection Diagram Ordering Information Order Number Spec. LM3433SQ NOPB LM3433SQX NOPB Pin Descriptions Pin Name ADJ DIM CGND COMP www.national.com Top View 24-Lead LLP NS Package Number SQA24A Package NSC Package Type Drawing LLP-24 SQA24A 1000 Units, Tape and Reel LLP-24 SQA24A 4500 Units, Tape and Reel On-time programming pin ...
Page 3
Pin Name Low side FET gate drive power bypass connection and boost diode anode connection. Tie 2.2µF capacitor between V 16 BST High side "synchronous" FET drive bootstrap rail High side "synchronous" FET gate ...
Page 4
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications EN, DIM, ADJ to CGND IN COMP BST CGND, DIMR, CSP, CSN (Note output DIMO to DIMR LO output BST2 Maximum Junction Temperature Electrical Characteristics Specifications in standard type face are for T Range ( T = − ...
Page 5
Symbol Parameter R DIMO output low resistance OLP R DIMO output high resistance OHP FUNCTIONAL CONTROL V V undervoltage lockout INUVLO undervoltage lockout CCUVLO CC EE thresholds V Enable threshold, with respect EN to CGND ...
Page 6
Typical Performance Characteristics Efficiency vs. LED Forward Voltage (V -V CGND EE Efficiency vs. LED Forward Voltage ( 14V) CGND EE V vs. V SENSE (V = 5.0V) IN www.national.com = 9V) 30031523 30031521 ADJ 30031519 6 Efficiency ...
Page 7
V vs. Temperature SENSE (ADJ = 1.0V) Startup Waveform nominal 3.3V -12V 3V open LED IN EE LED Top trace: EN input, 2V/div, DC Middle trace: V input current, ...
Page 8
Operation CURRENT REGULATOR OPERATION The LM3433 is a controller for a Continuous Conduction Buck Converter. Because of its buck topology and operation in the continuous mode, the output current is very well controlled. It only varies within a switching frequency ...
Page 9
TIMING COMPONENTS (R and Using the calculated value for TIME ON nents R and C can be selected enough to dominate the parasitic capacitance of the T A good C value for most applications ...
Page 10
Application Information www.national.com FIGURE Output Application Circuit FIGURE 14A Output Application Circuit 10 30031516 30031517 ...
Page 11
Some Recommended Inductors (Others May Be Used) Manufacturer Coilcraft Coiltronics Pulse Some Recommended Input/Bypass Capacitors (Others May Be Used) Manufacturer Vishay Sprague 293D, 592D, and 595D series tantalum Taiyo Yuden ESRD seriec Polymer Aluminum Electrolytic Cornell Dubilier MuRata Some Recommended ...
Page 12
Physical Dimensions www.national.com inches (millimeters) unless otherwise noted LLP-24 Pin Package (SQA) For Ordering, Refer to Ordering Information Table NS Package Number SQA24A 12 ...
Page 13
Notes 13 www.national.com ...
Page 14
... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...