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LTC3776 Datasheet(PDF) 2 Page - Linear Technology |
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LTC3776 Datasheet(HTML) 2 Page - Linear Technology |
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2 / 28 page  2 LTC3776 3776f Input Supply Voltage (VIN) ........................ – 0.3V to 10V PLLLPF, RUN/SS, SYNC/SSEN, VREF, SENSE1+, SENSE2+, VFB2 IPRG1, IPRG2 Voltages ................. – 0.3V to (VIN + 0.3V) VFB1, ITH1, ITH2 Voltages ........................... – 0.3V to 2.4V SW1, SW2 Voltages .............. –2V to VIN + 1V (10V Max) PGOOD ..................................................... – 0.3V to 10V ABSOLUTE AXI U RATI GS (Note 1) TG1, TG2, BG1, BG2 Peak Output Current (<10µs) ..... 1A Operating Temperature Range (Note 2) ... –40°C to 85°C Storage Temperature Range .................. –65°C to 125°C Junction Temperature (Note 3) ............................ 125°C Lead Temperature (Soldering, 10 sec) (LTC3776EGN) ..................................................... 300°C PACKAGE/ORDER I FOR ATIO 24 23 22 21 20 19 7 8 9 TOP VIEW 25 UF PACKAGE 24-LEAD (4mm × 4mm) PLASTIC QFN 10 11 12 6 5 4 3 2 1 13 14 15 16 17 18 ITH1 IPRG2 PLLLPF SGND VIN VREF SYNC/SSEN TG1 PGND TG2 RUN/SS BG2 TJMAX = 125°C, θJA = 37°C/W EXPOSED PAD (PIN 25) IS PGND MUST BE SOLDERED TO PCB 1 2 3 4 5 6 7 8 9 10 11 12 TOP VIEW GN PACKAGE 24-LEAD PLASTIC SSOP 24 23 22 21 20 19 18 17 16 15 14 13 SW1 IPRG1 VFB1 ITH1 IPRG2 PLLLPF SGND VIN VREF VFB2 ITH2 PGOOD SENSE1+ PGND BG1 SYNC/SSEN TG1 PGND TG2 RUN/SS BG2 PGND SENSE2+ SW2 ORDER PART NUMBER UF PART MARKING 3776 LTC3776EUF TJMAX = 125°C, θJA = 130°C/ W ORDER PART NUMBER LTC3776EGN Consult LTC Marketing for parts specified with wider operating temperature ranges. ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS Main Control Loops Input DC Supply Current (Note 4) Normal Operation ITH1 = ITH2 = 1.3V 575 850 µA Shutdown RUN/SS = 0V 9 20 µA UVLO VIN < UVLO Threshold –200mV 3 10 µA Undervoltage Lockout Threshold VIN Falling ● 1.95 2.25 2.55 V VIN Rising ● 2.15 2.45 2.75 V Shutdown Threshold at RUN/SS 0.45 0.65 0.85 V Start-Up Current Source RUN/SS = 0V 0.4 0.7 1 µA Regulated Feedback Voltage (VFB1)0°C to 85°C (Note 5) 0.591 0.6 0.609 V –40°C to 85°C ● 0.588 0.6 0.612 V Regulated Feedback Voltage (VFB2)VREF = 2.5V ● 1.232 1.250 1.268 V Output Voltage Line Regulation (VFB1) 2.75V < VIN < 9.8V (Note 5) 0.05 0.2 mV/V Output Voltage Line Regulation (VFB2) 0.02 0.1 mV/V |
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