LM2650M-ADJ National Semiconductor, LM2650M-ADJ Datasheet
LM2650M-ADJ
Specifications of LM2650M-ADJ
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LM2650M-ADJ Summary of contents
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... Typical Application Converting a Four-Cell Li Ion Battery to 5V © 2000 National Semiconductor Corporation Features n Ultra high efficiencies (95% possible) n High efficiency over milliamperes load range n Synchronous switching of internal NMOS power FETs n Wide input voltage range (4 ...
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... SLEEP IN ADJ (SIA): The value of the resistor connected between SIA and ground programs the sleep-in threshold. Higher values program lower thresholds. www.national.com DS012848-14 Top View 24-Lead Small Outline Package (M) Order Number LM2650M-ADJ See Package Number M24B Description IN DS(on) to GND close to the IC with a 0.2 µF capacitor. ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. (All voltages are referenced to the PGND and GND pins.) DC Voltage at PV and Voltage at SD, SLEEP LOGIC and SYNC DC current into SW Junction Temperature ...
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... See Application Notes on thermal management. The LM2650 actively limits its junction temperature to about 170˚C. Note 3: For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook published by National Semiconductor Corporation. Note 4: ESD is applied using the human-body model, a 100pF capacitor discharged through a 1.5k Note 5: A typical is the center of characterization data taken at T Note 6: All limits are guaranteed ...
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Typical Performance Characteristics I vs Input Voltage QSD DS012848 Oscillator Frequency Q DS012848-6 R Low-Side vs Junction DS(on) Temperature DS012848-9 Oscillator Frequency vs Adjusting Resistor DS012848- Input Voltage QS DS012848-4 R Low-Side vs Input Voltage DS(on) ...
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Block Diagrams FIGURE 1. The PWM Circuit with External Components in a Closed Control Loop FIGURE 2. The Hysteretic or Sleep Circuit with External Components in a Closed Control Loop FIGURE 3. The Internal Voltage Regulator and Voltage Reference used ...
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Operation OVERVIEW The LM2650 uses two step-down conversion modes: fixed-frquency pulse-width modulation (PWM) and hyster- etic. It moves freely and automatically between them, using PWM for moderate to heavy loads and hysteretic for light loads. For clarity, separate block diagrams ...
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Operation (Continued) The diode D2 is the body diode of Q2. The hysteretic circuit uses rectifier instead of switching synchro- nous rectifier. When the load current drops below the prescribed sleep-in threshold, the LM2650 ...
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Application Circuits (Continued) TABLE 1. Components for the Typical 90 kHz Application Circuit Input Voltage Applicable Cell Stacks Output Input Capacitor C IN Inductor L1 Output Capacitor C OUT Feedback Resistors R1 and R2 Compensation Components ...
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Application Circuits (Continued) FIGURE 5. An Efficient, 2% Accurate 5V to 3.3V Converter www.national.com 10 DS012848-20 ...
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... National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted 24-Lead Small-Outline Package (M) Order Number LM2650M-ADJ NS Package Number M24B 2. A critical component is any component of a life ...