Datasheet LTC3447 (Analog Devices) - 2

LTC3447
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
ORDER PART VIN, VCCD Voltages ...–0.3V to 6V TOP VIEW NUMBER RUN, VOUT, FB Voltages .. – 0.3V to VIN V 1 10 SDA OUT SW Voltage ... – 0.3V to (VIN + 0.3V) GND 2 9 VCCD LTC3447EDD SCL, SDA Voltages ... – 0.3V to VCCD FB 3 11 8 SCL P-Channel Switch Source Current (DC) ...800mA PGOOD 4 7 RUN V 5 6 SW N-Channel Switch Sink Current (DC) ...800mA IN DD PART Peak SW Sink and Source Current ...1.3A DD PACKAGE MARKING Operating Temperature Range (Note 2) ...– 40°C to 85°C 10-LEAD (3mm x 3mm)PLASTIC DFN EXPOSED PAD IS GND (PIN 11) LBKB Junction Temperature (Note 3) ... 125°C MUST BE SOLDERED TO PCB T Storage Temperature Range ...– 65°C to 125°C JMAX = 125°C, θJA = 43°C/W, θJC = 2.96°C/W Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
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denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 3.6V unless otherwise specifi ed. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RUN Run Threshold 0.3 1 1.5 V PGOOD Reports Undervoltage PGOOD = 0.4V 3 mA RVOUT Feedback Resistance 460 kΩ VOUT(MIN) Regulated Output Voltage ● 0.669 0.69 0.711 V VOUT(MAX) Regulated Output Voltage ● 1.989 2.05 2.112 V VOUT Output Voltage Step Size (6-bits) ● 20.3 21.6 22.9 mV ΔVOUT Output Voltage Line Regulation VIN = 2.5V to 5.5V (Note 6) ● 0.2 1.2 %/V 0.2 1 %/V IPK Peak Inductor Current Duty Cycle < 35%, Wafer Level 0.75 1 1.25 A VLOADREG Output Voltage Load Regulation 0.5 % VIN Input Voltage Range ● 2.5 5.5 V IS Input DC Bias Current (Note 4) Burst Mode Operation ILOAD = 0A 34 60 µA Active Mode VOUT = 90%, ILOAD = 0A 280 400 µA Shutdown VRUN = 0V, VIN = 5.5V 0.1 1 µA fOSC Nominal Oscillator Frequency VOUT = 100% ● 0.7 1 1.3 MHz VOUT = 0V 160 kHz RPFET RDS(ON) of P-Channel FET ISW = 100mA, Wafer Level 0.32 Ω RNFET RDS(ON) of N-Channel FET ISW = –100mA, Wafer Level 0.22 Ω ILSW SW Leakage VRUN = 0V, VSW = 0V or 5V, VIN = 5V ±0.1 ±1 µA FB Optional Start-Up Feedback Voltage Regulated Feedback Voltage 0.6 V IFB Feedback Input Current 2.5 10 nA SCLTHR I2C Clock Logic Threshold (Note 5) VCCD/2 V SCLHYST I2C Clock Logic Hysteresis (Note 5) 300 mV SDATHR I2C Data Logic Threshold (Note 5) VCCD/2 V SDAHYST I2C Data Logic Hysteresis (Note 5) 300 mV 3447f 2