Datasheet LTC3447 (Analog Devices) - 2

HerstellerAnalog Devices
BeschreibungI2C Controllable Buck Regulator in 3mm × 3mm DFN
Seiten / Seite16 / 2 — ABSOLUTE. AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL …
Dateiformat / GrößePDF / 578 Kb
DokumentenspracheEnglisch

ABSOLUTE. AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). ELECTRICAL CHARACTERISTICS. The

ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1) ELECTRICAL CHARACTERISTICS The

Modelllinie für dieses Datenblatt

Textversion des Dokuments

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

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