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LM26480SQ-BF/NOPB Datasheet(PDF) 8 Page - Texas Instruments |
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LM26480SQ-BF/NOPB Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 37 page  LM26480 SNVS543I – JANUARY 2008 – REVISED MAY 2013 www.ti.com Buck Converters SW1, SW2 Unless otherwise noted, VIN = 3.6V, CIN = 10 µF, COUT = 10 µF, LOUT = 2.2 µH. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, −40°C to +125°C. ( (1) (2) (3) (4) (5) (6) Symbol Parameter Conditions Min Typ Max Units VFB (6) Feedback Voltage −3 +3 % 2.8 < VIN < 5.5 Line Regulation 0.089 %/V IO =10 mA VOUT Load Regulation 100 mA < IO < IMAX 0.0013 %/mA Eff Efficiency Load Current = 250 mA 96 % ISHDN Shutdown Supply Current EN is de-asserted 0.01 1 µA Default oscillator frequency = 2.0 1.6 2.0 2.4 MHz fOSC Internal Oscillator Frequency MHz Default oscillator frequency = 2.1 1.7 2.1 2.5 MHz Buck1 Peak Switching Current Limit 2.0 2.4 IPEAK A Buck2 Peak Switching Current Limit 2.0 2.4 No load PFM Mode 33 µA Iq Quiescent Current “On” No load PWM Mode (Forced PWM) 2 mA RDSON (P) Pin-Pin Resistance PFET 200 400 m Ω RDSON (N) Pin-Pin Resistance NFET 180 400 m Ω TON Turn On Time Start up from shut-down 500 µsec CIN Input Capacitor Capacitance for stability 10 µF CO Output Capacitor Capacitance for stability 10 µF (1) All voltages are with respect to the potential at the GND pin. (2) Min and Max limits are speficified by design, test, or statistical analysis. Typical numbers represent the most likely norm. (3) CIN, COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics. (4) The device maintains a stable, regulated output voltage without a load. (5) Quiescent current is defined here as the difference in current between the input voltage source and the load at VOUT. (6) VIN ≥ VOUT + RDSON(P) (IOUT + 1/2 IRIPPLE). If these conditions are not met, voltage regulation will degrade as load increases. I/O Electrical Characteristics Unless otherwise noted: Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, TJ = −40°C to +125°C. Limit Symbol Parameter Conditions Units Min Max VIL Input Low Level 0.4 V VIH Input High Level 0.7*VDD V Power On Reset Threshold/Function (POR) Symbol Parameter Conditions Min Typ Max Units Default = 60 mS 60 mS nPOR = Power on reset for Buck1 and nPOR Buck2 Default = 130 µS 130 µS VBUCK1 AND VBUCK2 rising 92 nPOR Percentage of Target voltage Buck1 or % Threshold Buck2 VBUCK1 OR VBUCK2 falling 82 VOL Output Level Low Load = IOL = 500 µA 0.23 0.5 V 8 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: LM26480 |
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