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TPS65921B1ZQZ Fiches technique(PDF) 10 Page - Texas Instruments |
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TPS65921B1ZQZ Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 58 page TPS65921 SWCS048F – MARCH 2010 – REVISED MARCH 2012 www.ti.com VIO DCDC CONVERTER PARAMETER COMMENTS MIN TYP MAX UNIT Input voltage range 2.7 3.6 4.5 V 1.8 Output voltage(1) V 1.85 DC accuracy only –3% 3% Including all variations (line and load Output accuracy regulations, line and load transients, –4% 4% temperature, and process) Switching frequency 3.2 MHz IO = 10 mA, sleep 85% Conversion efficiency(2) 100 mA < IO < 400 mA 85% 400 mA < IO < 600 mA 80% On mode 700 mA Output current Sleep mode 10 mA Off at 30°C 1 Ground current (IQ) Sleep, unloaded 30 50 µA Active, unloaded, not switching 300 Load regulation 0 < IO < IMAX 20 mV Line regulation 10 mV IO = 10 mA to (IMAX/3) + 10 mA, Transient load regulation –65 50 mV maximum slew rate is IMAX/3/100 ns 300 mVPP ac input, 10-μs rise and fall Transient line regulation 10 mV time Start-up time 0.25 1 ms Recovery time From sleep to on with constant load < 10 100 µs Slew rate (rising or falling) 4 8 16 mV/µs Active (PWM and PSM) –10 10 mV Output ripple Sleep (PFM) –2% 2% Current limit for PWM/PSM mode switch. PSM is below this limit, and Active mode 150 200 mA PWM is above this limit. Overshoot Softstart 5% Output pulldown resistance In Off mode 500 700 Ω (1) This voltage is tuned according to the platform and transient requirements. (2) VBAT = 3.8 V, VIO = 1.8 V, Fs = 3.2 MHz, L = 1 μH, LDCR = 100 mΩ, C = 10 μF, ESR = 10 mΩ 10 Submit Documentation Feedback Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Link(s): TPS65921 |
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