LM26001MXA/NOPB National Semiconductor, LM26001MXA/NOPB Datasheet
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LM26001MXA/NOPB
Specifications of LM26001MXA/NOPB
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LM26001MXA/NOPB Summary of contents
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... Other features include Power good, adjustable soft-start, en- able pin, input under-voltage protection, and an internal boot- strap diode for reduced component count. Typical Application Circuit © 2010 National Semiconductor Corporation LM26001/LM26001Q Features ■ LM26001Q is an Automotive Grade product that is AEC- Q100 grade 1 qualified (-40°C to +125°C operating junction temperature) ■ ...
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Connection Diagram Ordering Information Order Number Package Type LM26001MXA TSSOP-16EXP LM26001MXAX TSSOP-16EXP LM26001QMXA TSSOP-16EXP LM26001QMXAX TSSOP-16EXP *Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. Reliability qualification is compliant with the ...
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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. Voltages from the indicated pins to GND: VIN -0.3V to 40V SW (Note 7) -0.5V to 40V VDD -0. VBIAS -0.3V to 10V FB -0. BOOT SW-0.3V to SW+7V PGOOD -0 ...
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Symbol Parameter F Lower frequency synchronization SYNC_DN range T Minimum Off-time OFFMIN T Minimum On-time ONMIN TH Sleep mode threshold hysteresis SLEEP_HYS TH Wake up threshold WAKE I BOOT pin leakage current BOOT Protection I Peak Current Limit LIMPK V ...
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Typical Performance Characteristics 12V 25°C. J VFB vs Temperature IQ and IVBIAS vs Temperature (Sleep Mode) Normalized Switching Frequency vs Temperature (300kHz) Unless otherwise specified the following conditions apply: Vin = (IDC = 300 mA) 20179403 IQ and ...
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Peak Current Limit vs Temperature Efficiency vs Load Current (330kHz) Startup Waveforms www.national.com Short Circuit Foldback Frequency vs V 20179415 Efficiency vs Load Current (500kHz) 20179408 Load Transient Response 20179410 6 FB (325 kHz nominal) 20179412 20179409 20179452 ...
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Low Input Voltage Dropout Nominal VOUT = 5V 20179453 7 www.national.com ...
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Block Diagram www.national.com 8 20179418 ...
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Operation Description GENERAL The LM26001 is a current mode PWM buck regulator. At the beginning of each clock cycle, the internal high-side switch turns on, allowing current to ramp up in the inductor. The in- ductor current is internally monitored ...
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Iin = Dwake Where I is the gate drive current, calculated as (4 And Io is the sum of Iload, ...
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Frequency reduc- tion begins at 20% below the nominal frequency setting. The minimum operating frequency in foldback mode is 71 kHz typical. If the ...
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VIN, it will not discharge through VIN. Therefore when the VIN voltage drops rapidly, VDD may remain high, especially in sleep mode. For fast line voltage transients, using a larger capacitor at the VDD pin ...
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When choosing the inductor, the saturation current rating must be higher than the maximum peak inductor current and the RMS current rating should be higher than the maximum load current. Peak inductor current, Ipeak, is calculated as: For example, at ...
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A Schottky diode must be used. It's low forward voltage max- imizes efficiency and BOOT voltage, while also protecting the SW pin against large negative voltage spikes COMPENSATION The purpose of loop compensation is to ensure stable oper- ation while ...
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Where B is the desired feedback gain in v/v between fp and fz, and gm is the transconductance of the error amplifier. A gain value around 10dB (3.3v/v) is generally a good starting point. Bandwidth increases with increasing values of ...
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Thermal Considerations and TSD Although the LM26001 has a built in current limit, at ambient temperatures above 80°C, device temperature rise may limit the actual maximum load current. Therefore, temperature rise must be taken into consideration to determine the maximum ...
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Physical Dimensions inches (millimeters) unless otherwise noted eTSSOP-16 Package 16-Lead Exposed Pad TSSOP Package NS Package Number MXA16A 17 www.national.com ...
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