Datasheet LTC4020 (Analog Devices) - 5

LTC4020
e lecTrical characTerisTics The
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denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). PVIN = SENSVIN = CSP = CSN = BAT = 20V, SHDN = 2V, C(TG1, BG1, TG2, BG2) = 1000pF, VRNG/SS = 2V. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
BGATE BGATE Pull-Down Current Charging Enabled 15 µA BGATE Pull-Up Current Charging Disabled; VCSN – VBGATE = 2V 15 µA BGATE Standby Pull-Down Current VSHDN = 0V 120 µA Ideal Diode Pull-Down Current Charging Disabled; VBAT – VCSN = 0.5V 500 µA Ideal Diode Forward Voltage VBAT – VCSN; VCSN Measured Through l 5 14 20 mV 100Ω Series Resistor TIMER Timer High Threshold 1.5 V Timer Low Threshold 1.0 V C/10 Mode Threshold (Rising) l 0.4 0.5 0.6 V C/10 Mode Hysteresis 225 mV Timer Source/Sink Current VTIMER = 1.25V l 8.5 10 11.5 µA VSTAT(L) Status Pins Enabled Voltage ISTAT1 = 1mA; ISTAT2 = 1mA l 0.15 0.4 V ISTAT1 = 5mA; ISTAT2 = 5mA l 0.75 2.5 V IVFBMIN Instant-On Feedback Bias Current 10 nA IVFB Feedback Pin Bias Current 10 nA IVIN_REG Input Regulation Bias Current 10 nA IFBG Pin Current (Disabled) VSHDN = 0V; VFBG = 55V 10 nA RNTC NTC Minimum Disable Resistance l 250 400 kΩ RFBG FBG Resistance to SGND IFBG = 1mA l 20 50 Ω
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings to the formula TJ = TA + (PD • θJA). Note that the maximum ambient may cause permanent damage to the device. Exposure to any Absolute temperature consistent with these specifications is determined by specific Maximum Rating condition for extended periods may affect device operating conditions in conjunction with board layout, the rated package reliability and lifetime. thermal resistance and other environmental factors. This IC includes
Note 2:
The LTC4020 is tested under pulsed load conditions such that overtemperature protection that is intended to protect the device during T momentary overload. Junction temperature will exceed 125°C when J ≈ TA. The LTC4020E is guaranteed to meet specifications from 0°C to 85°C junction temperature. Specifications over the –40°C to overtemperature protection is active. Continuous operation above the 125°C operating junction temperature range are assured by design, specified maximum operating junction temperature may impair device characterization, and correlation with statistical process controls. The reliability. LTC4020I is guaranteed over the full –40°C to 125°C operating junction
Note 3:
ICC does not include switching currents. VBST1 = VBST2 = VINTVCC temperature range. The junction temperature (TJ) is calculated from and VSW1 = VSW2 = 0V for testing. the ambient temperature (TA) and power dissipation (PD) according
Note 4:
See Typical Performance Characteristics 4020fd For more information www.linear.com/LTC4020 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts