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TPS65921BZQZ Datasheet(PDF) 8 Page - Texas Instruments |
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TPS65921BZQZ Datasheet(HTML) 8 Page - Texas Instruments |
8 / 58 page TPS65921 SWCS048F – MARCH 2010 – REVISED MARCH 2012 www.ti.com VDD1 DCDC CONVERTER PARAMETER COMMENTS MIN TYP MAX UNIT Input voltage range 2.7 3.6 4.5 V Output voltage 0.6 1.45 V Output voltage step 0.6 to 1.45 V 12.5 mV Output accuracy(1) 0.6 to < 0.8 V –6% 6% 0.8 to 1.45 V –5% 5% Switching frequency 3.2 MHz IO = 10 mA, sleep 82% 100 mA < IO < 400 mA 85% Conversion efficiency(2) 400 mA < IO < 600 mA 80% 600 mA < IO < 800 mA 75% Active mode 1.2 A Output voltage 0.6 V to 1.45 V for TPS65921B/TPS65921B1 Output current Active mode 1.4 A Output Voltage 1.2 V to 1.45 V for TPS65921B1 Sleep mode 10 mA Off at 30°C 3 Ground current (IQ) Sleep, unloaded 30 50 µA Active, unloaded, not switching 300 Short-circuit current VIN = VMAX 2.2 A Load regulation 0 < IO < IMAX 20 mV IO = 10 mA to (IMAX/3) + 10 mA, Transient load regulation at 1.2 A(3) –65 50 mV maximum slew rate is IMAX/3/100 ns Line regulation 10 mV 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) 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) Accuracy includes all variations (line and load regulations, line and load transients, temperature, and process). (2) VBAT = 3.6 V, VDD1 = 1.2 V, Fs = 3.2 MHz, L = 1 μH, LDCR = 100 mΩ, C = 10 μF, ESR = 10 mΩ (3) For negative transient load, the output voltage must discharge completely and settle to its final value within 100 ms. Transient load is specified at Vout max with a ±50% external capacitor accuracy and includes temperature and procress variation. (4) Load current varies proportional to the output voltage. The slew rate is for increasing and decreasing voltages and the load current is 1.1 A. 8 Submit Documentation Feedback Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Link(s): TPS65921 |
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