Datasheet LTC3520 (Analog Devices) - 2

LTC3520
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
TOP VIEW PVIN1, PVIN2, PVIN3, SVIN Voltage .. –0.3V to 6V SW1A, SW1B, SW2 Voltage IN3 IN1 OUT1 PV PV SW1A PGND1 SW1B V DC .. –0.3V to 6V 24 23 22 21 20 19 Pulsed <100ns .. –1V to 7V SV 1 18 IN FB1 Voltage, All Other Pins ... –0.3V to 6V AOUT 2 17 SS1 Operating Junction Temperature Range AIN 3 16 SGND 25 (Note 2) .. –40°C to 125°C R 4 15 T VC1 Maximum Junction Temperature (Note 5) .. 125°C PWM1 5 14 FB2 SD1 6 13 SS2 Storage Temperature Range .. –65°C to 150°C 7 8 9 10 11 12 SD2 SD3 IN2 PV SW2 WM2 PGND2 P UF PACKAGE 24-LEAD (4mm s 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 37°C/W EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3520EUF#PBF LTC3520EUF#TRPBF 3520 24-Lead (4mm × 4mm) Plastic QFN –40°C to 85°C LTC3520IUF#PBF LTC3520IUF#TRPBF 3520 24-Lead (4mm × 4mm) Plastic QFN –40°C to 125°C Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C, SVIN = PVIN1 = PVIN2 = PVIN3 = 3.6V, VOUT1 = 3.3V, RT = 54.9k, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage l 2.2 5.5 V Quiescent Current in Shutdown VSD1 = VSD2 = VSD3 = 0V LTC3520E l 0.01 1 μA LTC3520I l 0.5 4 μA Undervoltage Lockout SVIN Rising 2 2.2 V Burst Mode Quiescent Current, Both Converters VFB1 = VFB2 = 0.88V, VSD3 = 0V 55 μA Oscillator Frequency RT = 54.9k l 0.8 1 1.2 MHz
Buck Converter
PMOS Switch Resistance 0.32 Ω NMOS Switch Resistance 0.18 Ω NMOS Switch Leakage VSW2 = 5V, SVIN = PVIN1 = PVIN2 = PVIN3 = 5V 0.1 5 μA PMOS Switch Leakage VSW2 = 0V, SVIN = PVIN1 = PVIN2 = PVIN3 = 5V 0.1 10 μA 3520fa 2