Datasheet LT3587 (Analog Devices) - 4

LT3587
TYPICAL PERFORMANCE CHARACTERISTICS Specifi cations are at TA = 25°C unless otherwise noted. Quiescent Current Shutdown Quiescent Current When On But Not Switching vs Input Supply Voltage vs Input Supply Voltage VIN UVLO Voltage vs Temperature
10 3.5 2.20 VVIN = 3.6V VVIN = EN/SS1 = EN/SS3 = 3.6V EN/SS1 = EN/SS3 = 0V 125°C 125°C FB1 = VFB3 = 1.5V FB2 = IFB3 = 0V 8 3.0 90°C 2.15 90°C TAGE (V) 6 2.5 25°C 2.10 25°C UVLO VOL –40°C –40°C QUIESCENT CURRENT (μA) 4 2.0 2.05 QUIESCENT CURRENT (mA) 2 1.5 2.00 2.5 3 3.5 4 4.5 5 5.5 6 2.5 3 3.5 4 4.5 5 5.5 6 –50 –25 0 25 50 75 100 125 INPUT VOLTAGE (V) INPUT VOLTAGE (V) TEMPERATURE (°C) 3587 G01 3587 G02 3587 G03
FB1, VFB3 and IFB3 Regulation FB2 Regulation Voltage Voltage vs Temperature vs Temperature
1.240 0.825 15 VVIN = 3.6V V VVIN = 3.6V IFB3 RFB1 = RVFB3 = 1MΩ RFB2 = 1MΩ RIFB3 = 8.06kΩ , V I 10 VNEG = 100mA I VFB3 1.230 VOUT1 = 50mA 0.813 I V VOUT3 = 20mA FB3 REGULA TAGE (mV) TAGE (V) 5 1.220 0.800 TION VOL VIFB3 TION VOL TION VOL FB1 0 TAGE (V) REGULA 1.210 0.788 –5 FB2 REGULA 1.200 0.775 –10 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3587 G04 3587 G05
FB1, VFB3, IFB3 Bias Current in FB2 Bias Current in Regulation Regulation vs Temperature vs Temperature
14.50 106 –7.75 VVIN = 3.6V RFB2 =1MΩ 14.25 IVFB3 104 IVNEG = 100mA I –7.85 FB3 BIAS CURRENT (μA) 14.00 102 IFB1 –7.95 13.75 100 –8.05 13.50 I 98 BIAS CURRENT (μA) IFB3 VVIN = 3.6V FB2 BIAS CURRENT (μA) RFB1 = RVFB3 =1MΩ –8.15 13.25 R 96 IFB3 =8.06kΩ IVOUT1 = 50mA IVOUT3 = 20mA 13.00 94 –8.25 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3587 G06 3587 G07 3587fc 4