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LTC4080 Datasheet(PDF) 4 Page - Linear Technology |
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LTC4080 Datasheet(HTML) 4 Page - Linear Technology |
4 / 20 page LTC4080 4 4080fb SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RON_P PMOS Switch On-Resistance 0.95 Ω RON_N NMOS Switch On-Resistance 0.85 Ω ILIM_P PMOS Switch Current Limit 375 520 700 mA ILIM_N NMOS Switch Current Limit 700 mA IZERO_CF NMOS Zero Current in Normal Mode 15 mA IPEAK Peak Current in Burst Mode Operation MODE = VBAT 50 100 150 mA IZERO_BM Zero Current in Burst Mode Operation MODE = VBAT 20 35 50 mA tSS_BUCK Buck Soft-Start Time From the Rising Edge of EN_BUCK to 90% of Buck Regulated Output 400 μs Logic VIH Input High Voltage ⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pin Low to High ● 1.2 V VIL Input Low Voltage ⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pin High to Low ● 0.4 V VOL Output Low Voltage (⎯C⎯H⎯R⎯G, ⎯A⎯C⎯P⎯R) ISINK = 5mA ● 60 105 mV IIH Input Current High EN_BUCK, MODE Pins at 5.5V, VBAT = 5V ● –1 1 μA IIL Input Current Low ⎯E⎯N⎯_⎯C⎯H⎯R⎯G, EN_BUCK, MODE Pins at GND ● –1 1 μA R⎯E⎯N⎯_⎯C⎯H⎯R⎯G ⎯E⎯N⎯_⎯C⎯H⎯R⎯G Pin Input Resistance V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V 11.7 3.3 M Ω I⎯C⎯H⎯R⎯G ⎯⎯C⎯H⎯R⎯G Pin Leakage Current VBAT = 4.5V, V⎯C⎯H⎯R⎯G = 5V ● 1μA I⎯A⎯C⎯P⎯R ⎯A⎯C⎯P⎯R Pin Leakage Current VCC = 3V, V⎯C⎯H⎯R⎯G = 5V ● 1μA Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC4080 is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: Failure to solder the exposed backside of the package to the PC board ground plane will result in a thermal resistance much higher than 43°C/W. The ● denotes specifications which apply over the full operating tempera- ture range, otherwise specifications are at TA = 25°C, VCC = 5V, VBAT = 3.8V, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 0V, VEN_BUCK = VBAT, VMODE = 0V. (Note 2) ELECTRICAL CHARACTERISTICS Note 4: Although the LTC4080 charger functions properly at 3.75V, full charge current requires an input voltage greater than the desired final battery voltage per ΔVUVCL1 specification. Note 5: The 2.8V maximum buck undervoltage lockout (VUVLO_BUCK) exit threshold must first be exceeded before the minimum VBAT specification applies. Note 6: IC/10 is expressed as a fraction of measured full charge current with indicated PROG resistor. |
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Similar Description - LTC4080_15 |
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