Datasheet LTC4120, LTC4120-4.2 (Analog Devices) - 3

LTC4120/LTC4120-4.2
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = VRUN = 15V, VCHGSNS = VBAT = 4V, RPROG = 3.01k, VFB = 2.29V (LTC4120), VBATSNS = 4V (LTC4120-4.2). Current into a pin is positive out of the pin is negative. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Input Supply Range l 12.5 40 V Battery Voltage Range 0 11 V IIN DC Supply Current Switching, FREQ = GND 3.5 mA Standby Mode (Note 3) l 130 220 µA Sleep Mode (Note 3) LTC4120: VFB = 2.51V (Note 5), l 60 100 µA LTC4120-4.2: VBATSNS = 4.4V Disabled Mode (Note 3) l 37 70 µA Shutdown Mode (Note 3) l 20 40 µA ∆VDUVLO Differential Undervoltage Lockout VIN-VBAT Falling, VIN = 5V (LTC4120), l 20 80 160 mV VIN-VBATSNS Falling, VIN = 5V (LTC4120-4.2) Hysteresis VIN-VBAT Rising, VIN = 5V (LTC4120), 115 mV VIN-VBATSNS Rising, VIN = 5V (LTC4120-4.2) UVINTVCC INTVCC Undervoltage Lockout INTVCC Rising, VIN = INTVCC + 100mV, VBAT = NC l 4.00 4.15 4.26 V Hysteresis INTVCC Falling (Note 4) 220 mV
Battery Charger
IBAT BAT Standby Current Standby Mode (LTC4120) (Notes 3, 7, 8) l 2.5 4.5 µA Standby Mode (LTC4120-4.2) (Notes 3, 7, 8) l 50 1000 nA BAT Shutdown Current Shutdown Mode (LTC4120) (Notes 3, 7, 8) l 1100 2000 nA Shutdown Mode (LTC4120-4.2) (Notes 3, 7, 8) l 10 1000 nA IBATSNS BATSNS Standby Current (LTC4120-4.2) Standby Mode (Notes 3, 7, 8) l 5.4 10 µA BATSNS Shutdown Current (LTC4120-4.2) Shutdown Mode (Notes 3, 7, 8) l 1100 2000 nA IFB Feedback Pin Bias Current (LTC4120) VFB = 2.5V (Notes 5, 7) l 25 60 nA IFBG(LEAK) Feedback Ground Leakage Current (LTC4120) Shutdown Mode (Notes 3, 7) l 1 µA RFBG Feedback Ground Return Resistance (LTC4120) l 1000 2000 Ω VFB(REG) Feedback Regulation Voltage (LTC4120) (Note 5) 2.393 2.400 2.407 V l 2.370 2.418 V VFLOAT Regulated Float Voltage (LTC4120-4.2) 4.188 4.200 4.212 V l 4.148 4.227 V ICHG Battery Charge Current RPROG = 3.01k l 383 402 421 mA RPROG = 24.3k l 45 50 55 mA VUVCL Undervoltage Current Limit VIN Falling 12.0 V VRCHG Battery Recharge Threshold VFB Falling Relative to VFB_REG (LTC4120) (Note 5) l –38 –50 –62 mV VRCHG_4.2 Battery Recharge Threshold VBATSNS Falling Relative to VFLOAT (LTC4120-4.2) l –70 –92 –114 mV hPROG Ratio of BAT Current to PROG Current VTRKL < VFB < VFB(REG) (LTC4120) (Note 5) 988 mA/mA VTRKL_4.2 < VBATSNS < VFLOAT (LTC4120-4.2) VPROG PROG Pin Servo Voltage l 1.206 1.227 1.248 V RSNS CHGSNS-BAT Sense Resistor IBAT = –100mA 300 mΩ Rev. G For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuit Operation Applications Information Package Description Revision History Typical Application Related Parts