LM2642MTC/NOPB ,4.5-30V, Two-Phase Emulated Current Mode Synchoronous Buck Controller 28-TSSOP -40 to 125These devices have limited built-in ESD protection. The leads should be shorted together or the dev ..
LM2642MTC-NOPB ,4.5-30V, Two-Phase Emulated Current Mode Synchoronous Buck Controller 28-TSSOP -40 to 125FEATURES DESCRIPTIONThe LM2642 consists of two current mode2• Two Synchronous Buck Regulatorssynchr ..
LM2642MTCX ,Two-Phase Synchronous Step-Down Switching ControllerPin DescriptionsderivedfromVIN.ItsuppliestheinternalbiasforthechipandKS1 (Pin 1): The positive (+) ..
LM2642MTCX/NOPB ,4.5-30V, Two-Phase Emulated Current Mode Synchoronous Buck Controller 28-TSSOP -40 to 125 SNVS203I –MAY 2002–REVISED APRIL 2013system.ON/SS1 (Pin 9) Channel 1 enable pin. This pin is inter ..
LM2645MTD ,Advanced Two-Phase Switching Controller With Two Linear OutputsPin Descriptions (Continued)This pin is usually connected to the fixed 5V output ofof the top MOSFE ..
LM2645MTDX ,Advanced Two-Phase Switching Controller With Two Linear OutputsPin Descriptionsis pulled LOW (<0.8V), and are enabled when this pin ispulled HIGH (>2V).VO1 (Pin 1 ..
LM4916LD ,1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio AmplifierLM4916 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio AmplifierJuly 2003LM49161.5V, Mono 8 ..
LM4916LD ,1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifierfeaturescircuitrythatreducesoutputtransientsn Single ended headphone operation with coupling("click ..
LM4916LD/NOPB ,1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier 10-WSON -40 to 85ELECTRICAL CHARACTERISTICS FOR THE LM4916The following specifications apply for the circuit shown i ..
LM4916LDX ,1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio AmplifierGeneral Description Key Specificationsn Mono-BTL output powerThe unity gain stable LM4916 is both a ..
LM4917MT ,LM4917 Ground-Referenced, 95mW Stereo Headphone AmplifierBlock Diagram®Boomer is a registered trademark of National Semiconductor Corporation. 2004 National ..
LM4917SD ,LM4917 Ground-Referenced, 95mW Stereo Headphone AmplifierGeneral Description Key SpecificationsThe LM4917 is a stereo, output capacitor-less headphonej Impr ..
LM2642MTC/NOPB-LM2642MTC-NOPB-LM2642MTCX/NOPB
Two-Phase Synchronous Step-Down Switching Controller
LM2642
LM2642
LM2642 Two-Phase Synchronous Step-Down Switching Controller
Checkfor Samples: LM2642
1FEATURES DESCRIPTIONThe LM2642 consists of two current mode
Two Synchronous Buck Regulators synchronous buck regulator controllers with a
• 180° Outof Phase Operation switching frequencyof 300kHz.
4.5Vto 30V Input Range The two switching regulator controllers operate 180°
• Power Good Function Monitors Ch.1 outof phase. This feature reduces the input ripple
37µA Shutdown Current RMS current, thereby significantly reducing the
required input capacitance. The two switching
• 0.04% (typical) Line and Load Regulation Error regulator outputs can alsobe paralleledto operateas
• CurrentResistor• IndependentSimple• Configurable for Single Output Parallel bootstrap circuitry.
Operation. (See Figure 3). Current-mode feedback control assures excellent line
• Adjustable Cycle-by-Cycle Current Limit and load regulation anda wide loop bandwidth for
Input Lockout excellent responseto fast load transients. Currentis
sensed across either the Vds of the top FET or
• Output Latch Protection across an external current-sense resistor connected
• Output Protection with Delay in series with the drainof the top FET. Current limitis
Thermal independently adjustable for each channel.
Self Output Capacitors When the The LM2642 features analog soft-start circuitry thatis
Regulator• TSSOPAPPLICATIONS• Embedded Computer Systems of channel1. Over-voltage protectionis available for
• High End Gaming Systems both outputs.A UV-Delay pinis also availableto
• Set-top Boxes timefor theIC during an output
