Datasheet LT3652 (Analog Devices) - 3

LT3652
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 20V, Boost – SW = 4V, SHDN = 2V, VFB = 3.3V, CTIMER = 0.68µF. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN VIN Operating Range VBAT = 4.2 (Notes 3, 4) l 4.95 32 V VIN Start Voltage VBAT = 4.2 (Note 4) l 7.5 V VIN(OVLO) OVLO Threshold VIN Rising l 32 35 40 V OVLO Hysteresis 1 V VIN(UVLO) UVLO Threshold VIN Rising 4.6 4.95 V UVLO Hysteresis 0.2 V VFB(FLT) Float Voltage Reference (Note 6) 3.282 3.3 3.318 V l 3.26 3.34 V ΔVRECHARGE Recharge Reference Threshold Voltage Relative to VFB(FLT) (Note 6) 82.5 mV VFB(PRE) Reference Precondition Threshold VFB Rising (Note 6) 2.3 V VFB(PREHYST) Reference Precondition Threshold Voltage Relative to VFB(PRE) (Note 6) 70 mV Hysteresis VIN_REG(TH) Input Regulation Reference VFB = 3V; VSENSE – VBAT = 50mV l 2.65 2.7 2.75 V IIN_REG Input Regulation Reference Bias Current VIN_REG = VIN_REG(TH) l 35 100 nA IVIN Operating Input Supply Current CC/CV Mode, ISW = 0 l 2.5 3.5 mA Standby Mode 85 µA Shutdown (SHDN = 0) 15 µA IBOOST BOOST Supply Current Switch On, ISW = 0, 20 mA 2.5 < V(BOOST – SW) < 8.5 IBOOST/ISW BOOST Switch Drive ISW = 2A 30 mA/A VSW(ON) Switch-On Voltage Drop VIN – VSW, ISW = 2A 350 mV ISW(MAX) Switch Current Limit l 2.5 3 A VSENSE(PRE) Precondition Sense Voltage VSENSE – VBAT; VFB = 2V 15 mV VSENSE(DC) Maximum Sense Voltage VSENSE – VBAT; VFB = 3V (Note 7) l 95 100 105 mV VSENSE(C/10) C/10 Trigger Sense Voltage VSENSE – VBAT, Falling l 7.5 10 12.5 mV IBAT BAT Input Bias Current Charging Terminated 0.1 1 µA ISENSE SENSE Input Bias Current Charging Terminated 0.1 1 µA IREVERSE Charger Reverse Current VIN = 0; VBAT = VSENSE = VSW = 4.2V 1 µA IBAT + ISENSE + ISW IVFB VFB Input Bias Current Charging Terminated 65 nA IVFB VFB Input Bias Current CV Operation (Note 5) 110 nA VNTC(H) NTC Range Limit (High) VNTC Rising l 1.25 1.36 1.45 V VNTC(L) NTC Range Limit (Low) VNTC Falling l 0.27 0.29 0.315 V VNTC(HYST) NTC Threshold Hysteresis % of threshold 20 % RNTC(DIS) NTC Disable Impedance Impedance to ground l 250 500 kΩ INTC NTC Bias Current VNTC = 0.8V l 47.5 50 52.5 µA VSHDN Shutdown Threshold Rising l 1.15 1.2 1.25 V VSHDN(HYST) Shutdown Hysteresis 120 mV ISHDN SHDN Input Bias Current –10 nA VCHRG, VFAULT Status Low Voltage 10mA Load l 0.4 V ITIMER Charge/Discharge Current 25 µA VTIMER(DIS) Timer Disable Threshold l 0.1 0.25 V 3652fe For more information www.linear.com/LT3652 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Typical Application Related Parts