LM2651MTCX-ADJ National Semiconductor, LM2651MTCX-ADJ Datasheet
LM2651MTCX-ADJ
Specifications of LM2651MTCX-ADJ
Available stocks
Related parts for LM2651MTCX-ADJ
LM2651MTCX-ADJ Summary of contents
Page 1
... Typical Application Efficiency vs Load Current ( 3.3V IN OUT © 2005 National Semiconductor Corporation Features n Ultra high efficiency up to 97% n High efficiency over a 1.5A to milliamperes load range 14V input voltage range n 1.8V, 2.5V, 3.3V, or ADJ output voltage n Internal MOSFET switch with low R n 300kHz fixed frequency internal oscillator n 7µ ...
Page 2
... Part Number Supplied as 2.5k Units, Tape and Reel LM2651MTCX-1.8 LM2651MTCX-2.5 LM2651MTCX-3.3 LM2651MTCX-ADJ Switched-node connection, which is connected with the source of the internal high-side MOSFET. Main power supply pin. Bootstrap capacitor connection for high-side gate drive. Input supply voltage for control and driver circuits. ...
Page 3
... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage Feedback Pin Voltage Power Dissipation (T =25˚C), A (Note 2) Junction Temperature Range LM2651-1.8 System Parameters boldface type apply over full operating junction temperature range. V ...
Page 4
LM2651-ADJ System Parameters (V = 2.5V unless otherwise specified) OUT Symbol Parameter V Feedback Voltage FB V Output Voltage Line OUT Regulation V Output Voltage Load OUT Regulation V Output Voltage Load OUT Regulation V Sleep Mode Output Voltage HYST ...
Page 5
All Output Voltage Versions Specifications in standard type face are for T perature range. V =10V unless otherwise specified. IN Symbol Parameter V Error Amplifier Output Swing EAL Lower Limit V Body Diode Voltage D f Oscillator Frequency OSC D ...
Page 6
Typical Performance Characteristics I vs Input Voltage Junction Temperature QSD R vs Input Voltage DS(ON) www.national.com 10092505 10092507 R DS(ON) 10092509 Input Voltage QSD 10092506 Frequency vs Junction Temperature 10092508 vs Junction Temperature 10092510 ...
Page 7
Typical Performance Characteristics Current Limit vs Input Voltage (V =2.5V) OUT Current Limit vs Junction Temperature (V = 3.3V) OUT Sleep Mode Threshold vs Output Voltage For ADJ version (V IN (Continued) 10092511 10092513 = 5V) 10092525 7 Current Limit ...
Page 8
... The output voltage starts to drop until it hits the low threshold of the hysteretic comparator, and the part immediately goes back to the PWM operation. The output ...
Page 9
Design Procedure (Continued) INPUT CAPACITOR A low ESR aluminum, tantalum, or ceramic capacitor is needed betwen the input pin and power ground. This capaci- tor prevents large voltage transients from appearing at the input. The capacitor is selected based on ...
Page 10
Design Procedure (Continued) EXTERNAL SCHOTTKY DIODE A Schottky diode D is recommended to prevent the intrinsic 1 body diode of the low-side MOSFET from conducting during the deadtime in PWM operation and hysteretic mode when both MOSFETs are off. If ...
Page 11
... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...