Datasheet LTC3549 (Analog Devices) - 2
| Manufacturer | Analog Devices |
| Description | 250mA Low VIN Buck Regulator in 2mm × 3mm DFN |
| Pages / Page | 16 / 2 — ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order … |
| File Format / Size | PDF / 370 Kb |
| Document Language | English |
ABSOLUTE AXI U. RATI GS. PACKAGE/ORDER I FOR ATIO. (Note 1). Order Options. The. ELECTRICAL CHARACTERISTICS
Model Line for this Datasheet
Text Version of Document
LTC3549
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW Input Supply Voltage ... –0.3V to 6V RUN, V FB FB, MODE Voltages ...–0.3V to (VIN + 0.3V) V RUN MODE SW Voltage < 100ns Pulse ...–0.3V to (V 6 5 4 IN + 0.3V) Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) ... 125°C 7 Storage Temperature Range .. –65°C to 125°C 1 2 3 INV GND SW DCB PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 64°C/W EXPOSED PAD (PIN 7) IS GND MUST BE SOLDERED TO PCB ORDER PART NUMBER DCB PART MARKING LTC3549EDCB LBZR
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 = 2.2V. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range ● 1.6 5.5 V VRUN RUN Threshold ● 0.3 0.7 1.1 V IRUN RUN Leakage Current VRUN = 0 or 2.2V 0.01 1 µA VMODE MODE Threshold ● 0.3 0.65 1.1 V IMODE MODE Leakage Current VMODE = 0 or 2.2V 0.01 1 µA VFB Regulated Feedback Voltage TA = 25°C (Note 4) ● 0.599 0.611 0.623 V 0°C ≤ TA ≤ 85°C (Note 4) 0.597 0.611 0.623 V –40°C ≤ TA ≤ 85°C (Note 4) 0.596 0.611 0.626 V IVFB Feedback Current ● ±30 nA ΔVOVL ΔVFBOVL Overvoltage Lockout ΔVOVL = ΔVFBOVL – VFB (Note 6) 40 60 80 mV ΔVFB Reference Voltage Line Regulation 1.6V < VIN < 5.5V (Note 4) ● 0.04 0.4 %/V ΔVOUT Output Voltage Line Regulation IOUT = 100mA, 1.6V < VIN < 5.5V (Note 7) 0.04 0.4 %/V IPK Peak Inductor Current VFB = 0.5V or VOUT = 90% 0.3 0.45 0.6 A VLOADREG Output Voltage Load Regulation Pulse Skip Mode, VOUT = 1.2V, 0.5 % 50mA < ILOAD < 250mA (Note 7) 3549f 2
W W W U U W U ABSOLUTE AXI U RATI GS PACKAGE/ORDER I FOR ATIO (Note 1)
TOP VIEW Input Supply Voltage ... –0.3V to 6V RUN, V FB FB, MODE Voltages ...–0.3V to (VIN + 0.3V) V RUN MODE SW Voltage < 100ns Pulse ...–0.3V to (V 6 5 4 IN + 0.3V) Operating Temperature Range (Note 2) ... –40°C to 85°C Junction Temperature (Note 3) ... 125°C 7 Storage Temperature Range .. –65°C to 125°C 1 2 3 INV GND SW DCB PACKAGE 6-LEAD (2mm × 3mm) PLASTIC DFN TJMAX = 125°C, θJA = 64°C/W EXPOSED PAD (PIN 7) IS GND MUST BE SOLDERED TO PCB ORDER PART NUMBER DCB PART MARKING LTC3549EDCB LBZR
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 = 2.2V. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Voltage Range ● 1.6 5.5 V VRUN RUN Threshold ● 0.3 0.7 1.1 V IRUN RUN Leakage Current VRUN = 0 or 2.2V 0.01 1 µA VMODE MODE Threshold ● 0.3 0.65 1.1 V IMODE MODE Leakage Current VMODE = 0 or 2.2V 0.01 1 µA VFB Regulated Feedback Voltage TA = 25°C (Note 4) ● 0.599 0.611 0.623 V 0°C ≤ TA ≤ 85°C (Note 4) 0.597 0.611 0.623 V –40°C ≤ TA ≤ 85°C (Note 4) 0.596 0.611 0.626 V IVFB Feedback Current ● ±30 nA ΔVOVL ΔVFBOVL Overvoltage Lockout ΔVOVL = ΔVFBOVL – VFB (Note 6) 40 60 80 mV ΔVFB Reference Voltage Line Regulation 1.6V < VIN < 5.5V (Note 4) ● 0.04 0.4 %/V ΔVOUT Output Voltage Line Regulation IOUT = 100mA, 1.6V < VIN < 5.5V (Note 7) 0.04 0.4 %/V IPK Peak Inductor Current VFB = 0.5V or VOUT = 90% 0.3 0.45 0.6 A VLOADREG Output Voltage Load Regulation Pulse Skip Mode, VOUT = 1.2V, 0.5 % 50mA < ILOAD < 250mA (Note 7) 3549f 2
