Datasheet LTC3547 (Analog Devices) - 2

FabricanteAnalog Devices
DescripciónDual Monolithic 300mA Synchronous Step-Down Regulator
Páginas / Página16 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order …
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ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. The. ELECTRICAL CHARACTERISTICS

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

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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

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