Datasheet LTC3546 (Analog Devices) - 4

LTC3546
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = VCCA = 3.6V, unless otherwise specified. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN1, VIN1D, Operating Voltage Range VIN1 = VIN1D = VIN2 = VCCA = VCCD 2.3 5.5 V VIN2, VCCA, VCCD IFB1, IFB2 Feedback Pin Input Current (Note 3) ±0.1 µA VFB1, VFB2 Feedback Voltage (Note 3) l 0.588 0.6 0.612 V ΔVLINEREG Reference Voltage Line Regulation VIN = 2.3V to 5.5V (Note 3) 0.04 0.2 %/V %/V is The Percentage Change in VOUT with a Change in VIN ΔVLOADREG Output Voltage Load Regulation ITH1, ITH2 = 0.36V (Note 3) l 0.02 0.2 % ITH1, ITH2 = 0.84V (Note 3) l –0.02 –0.2 % gm(EA) Error Amplifier Transconductance (Note 3) 1400 µS VTRACK/SS1, Tracking Voltage Offset VTRACK/SS1,2 = 0.3V 15 mV VTRACK/SS2 ITRACK/SS1, Tracking Current Source VTRACK/SS1,2 = 0V 0.8 1.15 1.5 µA ITRACK/SS2 IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.55V, VMODE = VIN, 600 990 µA VRUN1 = VRUN2 = VIN Half Active Mode (VRUN1 = VIN, VRUN2 = 0) VFB1 = 0.55V, VMODE = VIN, VRUN1 = VIN, 400 800 µA VRUN2 = 0V Half Active Mode (VRUN1 = 0, VRUN2 = VIN) VFB2 = 0.55V, VMODE = VIN, VRUN1 = 0V, 400 800 µA VRUN2 = VIN Both Channels in Sleep Mode VFB1 = VFB2 = 0.75V, VMODE = VIN, 160 300 µA VRUN1 = VRUN2 = VIN Shutdown VRUN1 = VRUN2 = 0V 0.2 1 µA fOSC Oscillator Frequency VFREQ: RT = VIN 1.8 2.25 2.9 MHz VFREQ: RT = 143k l 1.2 1.5 1.8 MHz VFREQ: Resistor (Note 5) 0.75 4 MHz ILIM1 Peak Switch Current Limit on SW1 (1A) BMC1 = VIN, VITH1 = 1.4V 1.4 1.6 A BMC1 = 0.4V, VITH1 = 0V 0.45 A ILIM2 Peak Switch Current Limit on SW2A/B (2A) BMC2 = VIN, VITH1 = 1.4V 2.8 3.2 A BMC2 = 0.4V, VITH1 = 0V 0.9 A ILIM1+1D Peak Switch Current Limit on SW1 Externally Connected to SW1D SW1 + SW1D (2A) BMC1 = VIN (Note 8) 2.5 3.2 A BMC1 = 0.4V (Note 8) 1.6 A ILIM2+1D Peak Switch Current Limit on SW2A/B Externally Connected to SW1D SW2A/B + SW1D (3A) BMC2 = VIN (Note 8) 3.75 4.8 A BMC2 = 0.4V (Note 8) 2.4 A RDS(ON)1 SW1 Top Switch On-Resistance (1A) VIN2 = 3.6V 0.19 Ω SW1 Bottom Switch On-Resistance VIN2 = 3.6V 0.18 Ω RDS(ON)1D SW1D Top Switch On-Resistance (1A) VIN2 = 3.6V 0.19 Ω SW1D Bottom Switch On-Resistance VIN2 = 3.6V 0.17 Ω RDS(ON)2 SW2A/B Top Switch On-Resistance (2A) VIN1 = 3.6V 0.096 Ω SW2A/B Bottom Switch On-Resistance VIN1 = 3.6V 0.085 Ω ISW1(LKG) Switch Leakage Current SW1 VIN = 6V 0.01 1 µA VITH1 = 0V VRUN1 = 0V 3546fd 4 For more information www.linear.com/3546