Datasheet LTC3547 (Analog Devices) - 2

LTC3547
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW VIN ... –0.3V to 6V VFB1, VFB2 ... –0.3V to VIN +0.3V V 1 8 FB1 VFB2 RUN1, RUN2 ... –0.3V to VIN +0.3V RUN1 2 7 RUN2 9 SW1, SW2 (DC) .. –0.3V to VIN +0.3V VIN 3 6 SW2 P-Channel Switch Source Current (DC) ...500mA SW1 4 5 GND N-Channel Switch Sink Current (DC) ...500mA Peak SW Sink and Source Current (Note 5) ...700mA DDB PACKAGE 8-LEAD (3mm × 2mm) PLASTIC DFN Ambient Operating Temperature Range ... –40°C to 85°C TJMAX = 125°C, θJA = 76°C/W EXPOSED PAD (PIN 9) IS GND MUST BE SOLDERED TO PCB Maximum Junction Temperature .. 125°C Storage Temperature Range ... –65°C to 125°C ORDER PART NUMBER DDB PART MARKING LTC3547EDDB LCDP LTC3547EDDB-1 LCPC
Order Options
Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
The ELECTRICAL CHARACTERISTICS
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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 noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN VIN Operating Voltage ● 2.5 5.5 V VUV VIN Undervoltage Lockout VIN Low to High ● 2.0 2.5 V IFB Feedback Pin Input Current LTC3547, VFB = VFBREG ● 30 nA LTC3547-1, VFB = VFBREG ● 3 6 µA VFBREG1 Regulated Feedback Voltage (VFB1) LTC3547, 0°C ≤ TA ≤ 85°C 0.590 0.600 0.610 V LTC3547, –40°C ≤ TA ≤ 85°C ● 0.588 0.600 0.612 V LTC3547-1, 0°C ≤ TA ≤ 85°C 1.770 1.800 1.830 V LTC3547-1, –40°C ≤ TA ≤ 85°C ● 1.764 1.800 1.836 V VFBREG2 Regulated Feedback Voltage (VFB2) LTC3547, 0°C ≤ TA ≤ 85°C 0.590 0.600 0.610 V LTC3547, –40°C ≤ TA ≤ 85°C ● 0.588 0.600 0.612 V LTC3547-1, 0°C ≤ TA ≤ 85°C 1.180 1.200 1.220 V LTC3547-1, –40°C ≤ TA ≤ 85°C ● 1.176 1.200 1.224 V ΔV Reference Voltage Line Regulation V LINEREG IN = 2.5V to 5.5V 0.3 0.5 %/V ΔV Output Voltage Load Regulation I LOADREG LOAD = 0mA to 300mA 0.5 % IS Input DC Supply Current Active Mode (Note 3) VFB1 = VFB2 = 0.95V × VFBREG 450 700 µA Sleep Mode VFB1 = VFB2 = 1.05V × VFBREG, VIN = 5.5V 40 60 µA Shutdown RUN1 = RUN2 = 0V, VIN = 5.5V 0.1 1 µA fOSC Oscillator Frequency VFB = 0.6V ● 1.8 2.25 2.7 MHz ILIM Peak Switch Current Limit VIN = 3V, VFB < VFBREG, Duty Cycle < 35% Channel 1 (300mA) 400 550 mA Channel 2 (300mA) 400 550 mA 3547fa 2