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LTC3856 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3856 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 40 page  LTC3856 3856f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Differential Amplifier ADA Gain E-Grade I-Grade l l 0.998 0.997 1 1 1.002 1.003 V/V V/V RIN Input Resistance Measured at DIFFP Input 80 kΩ VOS Input Offset Voltage VDIFFP = VDIFFOUT = 1.5V, IDIFFOUT = 100µA 2 mV PSRR Power Supply Rejection Ratio 4.5V < VIN < 38V 100 dB ICL Maximum Output Current 2 3 mA VOUT(MAX) Maximum Output Voltage IDIFFOUT = 300µA VINTVCC –1.4 VINTVCC –1.1 V On-Chip Driver TG RUP TG Pull-Up RDS(ON) TG High 2.6 Ω TG RDOWN TG Pull-Down RDS(ON) TG Low 1.5 Ω BG RUP BG Pull-Up RDS(ON) BG High 2.4 Ω BG RDOWN BG Pull-Down RDS(ON) BG Low 1.1 Ω GBW Gain-Bandwidth Product (Note 8) 3 MHz SR Slew Rate (Note 8) 2 V/µs Stage Shedding Mode IISET Programmable Stage Shedding Mode Current 6.5 7.5 8.5 µA AVP (Active Voltage Positioning) VAVP Maximum VOUT with AVP 2.5 V ISINK Sink Current of AVP Pin SENSE+ = 1.2V 250 µA ISOURCE Source Current of AVP Pin SENSE+ = 1.2V 2 mA VAVP-VO(MAX) Maximum Voltage Drop VAVP to VO SENSE+ = 1.2V 120 mV elecTrical characTerisTics The l denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN = 5V, unless otherwise noted. 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 LTC3856 is tested under pulse load conditions such that TJ ≈ TA. The LTC3856E is guaranteed to meet performance specifications from 0°C to 85°C operating junction temperature. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3856I is guaranteed to meet performance specifications over the full –40°C to 125°C operating junction temperature range. Note 3: TJ is calculated from the ambient temperature, TA, and power dissipation, PD, according to the following formula: LTC3856UH: TJ = TA + (PD • 34°C/W) LTC3856FE: TJ = TA + (PD • 25°C/W) Note 4: The LTC3856 is tested in a feedback loop that servos VITH to a specified voltage and measures the resultant VFB. Note 5: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See the Applications Information section. Note 6: Rise and fall times are measured using 10% and 90% levels. Delay times are measured using 50% levels. Note 7: The minimum on-time condition corresponds to the on inductor peak-to-peak ripple current ≥40% of IMAX (see Minimum On-Time Considerations in the Applications Information section). Note 8: Guaranteed by design. |
Similar Part No. - LTC3856_15 |
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Similar Description - LTC3856_15 |
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