Datasheet LTC4071 (Analog Devices) - 3

link to page 2 LTC4071
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range. Conditions are VNTC = VADJ = VCC, VLBSEL = GND, TJ = 25°C unless otherwise specified. Current into a pin is positive and current out of a pin is negative. All voltages are referenced to GND unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Low Battery Disconnect
ILEAK Battery Disconnect Leakage VCC < VBAT = 2.65V l 0.01 25 nA Current 0.01 nA RDSON Resistance of VCC – BAT Switch IBAT = –1mA, VHBO High 4 6 Ω VLBD Low Battery Disconnect VBAT Falling, IBAT = –1mA, LBSEL = VCC, 0°C < Temp < 125°C 2.60 2.70 2.79 V VBAT Falling, IBAT = –1mA, LBSEL = VCC l 2.52 2.70 2.79 V VBAT Falling, IBAT = –1mA, LBSEL = GND, 0°C < Temp < 125°C 3.05 3.20 3.28 V VBAT Falling, IBAT = –1mA, LBSEL = GND l 2.95 3.20 3.28 V VLBC_BAT Low Battery Connect VBAT Rising, IBAT = –1mA, LBSEL = VCC 2.97 V VBAT Rising, IBAT = –1mA, LBSEL = GND 3.53 V VLBC_VCC Low Battery Connect VCC Rising, LBSEL = VCC 3.6 V VCC Rising, LBSEL = GND 4.19 V
High Battery Status
VHBTH HBO Threshold (VFLOAT – VCC) VCC Rising l 15 40 75 mV VHBHY Hysteresis 100 mV
Status Output: HBO
VOL CMOS Output Low ISINK = 1mA, VCC = 3.7V 0.5 V VOH CMOS Output High ISOURCE = –0.5mA, ICC = 1.5mA VCC – 0.6 V
Selection Inputs: ADJ, LBSEL
VADJ_IL ADJ VIL Input Logic Low Level l 0.3 V VADJ_IH ADJ VIH Input Logic High Level l VCC – 0.3 V IADJ(Z) Allowable ADJ Leakage Current l ±3 µA in Floating State VLBSEL_IL LBSEL VIL Input Logic Low Level l 250 mV VLBSEL_IH LBSEL VIH Input Logic High Level l 1.4 V ILBSEL LBSEL Leakage Current 0 ≤ LBSEL ≤ VCC l –5 0 5 nA
NTC
INTC NTC Leakage Current 0V ≤ NTC ≤ VCC l –5 0 5 nA INTCBIAS Average NTCBIAS Sink Current Pulsed Duty Cycle < 0.002% 30 50 pA NTCTH1 NTC Comparator Falling VNTC as Percentage of VNTCBIAS Amplitude 35.5 36.5 38 % Thresholds NTCTH2 28.0 29.0 30.5 % NTCTH3 21.8 22.8 23.8 % NTCTH4 16.8 17.8 18.8 % NTCHY Hysteresis 30 mV ∆VFLOAT(NTC) Delta Float Voltage per NTC NTC Falling Below One of the NTCTH Thresholds Comparator Step ADJ = 0V –57 –50 –43 mV ADJ = Floating –82 –75 –68 mV ADJ = VCC –107 –100 –93 mV
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings –40°C to 125°C operating junction temperature range are assured by may cause permanent damage to the device. Exposure to any Absolute design, characterization and correlation with statistical process controls. Maximum Rating condition for extended periods may affect device The LTC4071I is guaranteed over the full –40°C to 125°C operating reliability and lifetime. junction temperature range. Note that the maximum ambient temperature
Note 2:
The LTC4071 is tested under pulsed load conditions such that consistent with these specifications is determined by specific operation T conditions in conjunction with board layout, the rated package thermal J ≈ TA. The LTC4071E is guaranteed to meet performance specifications for junction temperatures from 0°C to 85°C. Specifications over the impedance and other environmental factors. Rev. D 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 Operation Applications Information Package Description Revision History Typical Application Related Parts