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PV88090 Fiches technique(PDF) 13 Page - Dialog Semiconductor |
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PV88090 Fiches technique(HTML) 13 Page - Dialog Semiconductor |
13 / 42 page PV88090 High Efficiency 3-Channel Buck Converter with dual LDO Datasheet Revision 1.0 10-Dec-2017 CFR0011-120-00 13 of 42 © 2017 Dialog Semiconductor Parameter Description Conditions Min Typ Max Unit LBUCK2 Inductor value Including current and temperature dependence -30 % 1.5 +30 % μH VBUCK2 Output voltage IOUT = IMAX Step = 6.25 mV 1.0 2.19 V IOUT = IMAX Step 12.5 mV 2.2 2.5 V VBUCK2_ACC Output voltage accuracy IOUT = ½ IMAX -3 3 % VBUCK2_RPL Output voltage ripple IOUT = IMAX VOUT = 1.0 V 30 mVpp VTRLOAD Load regulation transient IOUT = ¼ IMAX to IMAX tr = tf = 10 µs VOUT = 1 V L = 1.5 μH 25 mV VTRLINE Line regulation transient VDD = 4.75 V to 5.25 V tr = tf = 10 µs IOUT = 2000 mA 10 mV IMAX Output current 2000 mA ILIM Peak Inductor Current Limit (programmable) Buck2_sync_ilim = 11 -20 % 4189 +20 % mA IQFF Quiescent current in OFF mode 2 μA F Switching frequency 1 MHz D Switching duty cycle 10 95 % RPD Output pull-down resistor Can be switched off via BUCK2_PD_DIS 200 Ω RPMOS On resistance PMOS Include pin and routing 0.125 Ω RNMOS On resistance NMOS Include pin and routing 0.050 Ω 5.4.3.3 Buck3 Electrical Characteristics Unless otherwise noted, the following is valid for TA = 25 ºC, VDD = 5 V, COUT = 2 x47 μF, local sensing. Table 9: Buck3 Electrical Characteristics Parameter Description Conditions Min Typ Max Unit VDD Input voltage 4.75 5.25 V COUT Output capacitance Including voltage and temperature coefficient 60 100 (2 x 47) 400 μF LBUCK3 Inductor value Including current and temperature dependence -30 % 1.5 +30 % μH VBUCK3 Output voltage IOUT = IMAX Step 6.25 mV 1.3 2.19 V IOUT = IMAX Step 12.5 mV 2.2 3.4 V VBUCK3_ACC Output voltage accuracy IOUT = ½ IMAX, note: VBUCK3 =< 2.5V -3 3 % |
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