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SC908EVB Datasheet(PDF) 5 Page - Semtech Corporation |
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SC908EVB Datasheet(HTML) 5 Page - Semtech Corporation |
5 / 30 page SC908 5 Electrical Characteristics (continued) Parameter Symbol Conditions Min Typ Max Units Core Functions (Excluding Charger) Core Circuits Quiescent Current (4) I Q-Core V VAD = V SEN = 0V, V LEN = V BAT = 4.2V 100 μA VREF Reference Voltage V VREF 0.75 V VREF Power Supply Rejection PSRR REF V BAT = 3.7V with 0.5V P-to-P ripple, f ≤ 10kHz, C VREF = 10nF 70 dB VREF Reference Voltage Start-Up Time (5, 10) t SU_REF Delay from first of SEN high LEN high, V BAT = 3.7V C VREF = 10nF VREF from 0V to 95% of final 0.4 ms DC-DC Buck Converter Buck Converter Input Voltage V SVIN BAT pin is also the switching regulator supply input V BAT V Buck Converter Under-Voltage Lockout Rising Threshold VT SUVLO-R 2.8 V Buck Converter Under-Voltage Lockout Falling Threshold VT SUVLO-F 2.55 V Buck Converter Under-Voltage Lockout Hysteresis VT SUVLO-HYS 84 mV Buck Converter Quiescent Current (2) I BAT-Q V SEN = V BAT , I SVOUT = 10mA Low I Q mode of P SAVE 115 μA Buck Converter Minimum On-Time t SON_MIN 60 ns Buck Converter Maximum Duty Cycle (10) SDC MAX 92 % Buck Converter Program Output Voltage Minimum (6,10) V SVOUT_MIN 1V Buck Converter Program Output Voltage Maximum(6,7,8,10) V SVOUT_MAX V BAT ≥ V SVOUT_MAX /SDC MAX +150mV 3 V Buck Converter Feedback Regulation Voltage V SFB 0.480 0.500 0.520 V Buck Converter Output Voltage(6) V SVOUT V BAT = 3.7V, L = 4.7μH I SVOUT = 100mA R S1 = 340kΩ, R S2 = 100kΩ 2.2 V Buck Converter Line Regulation(6) V SVOUT_LINE 2.8V ≤ V BAT ≤ 4.5V I SVOUT = 100mA R S1 = 340kΩ, R S2 = 100kΩ -0.3 0.3 %/V Buck Converter Load Regulation (6) V SVOUT_LOAD 5mA ≤ I SVOUT ≤ 150mA V BAT = 3.7V R S1 = 340kΩ, R S2 = 100kΩ 0.002 %/mA |
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