Datasheet LT3922-1 (Analog Devices) - 2

LT3922-1
ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1)
VIN and EN/UVLO ..40V TOP VIEW ISP, ISN, and VOUT ..40V SW SW NC NC V OUT GND ISP – ISN ...0.3V 28 27 26 25 24 23 CTRL and FB ..3.3V SW 1 22 GND OVLO, PWM, SYNC/SPRD, and FAULT ..6V BST 2 21 VOUT SS and V INTVCC 3 20 PWMTG C ..3.3V VIN 4 19 SW ..40V 29 PWM GND EN/UVLO 5 18 RP BST ...43V OVLO 6 17 SYNC/SPRD BST – SW ...3V VREF 7 16 RT INTVCC, VREF, ISMON, PWMTG, RT, and RP ..(Note 2) CTRL 8 15 FAULT Operating Junction Temperature Range (Notes 3, 4) 9 10 11 12 13 14 LT3922E-1/LT3922I-1 .. –40 to 125°C ISP ISN V C FB SS LT3922H-1 ...–40 to 150°C ISMON UFD PACKAGE Storage Temperature Range ..–60 to 150°C 28-LEAD (4mm × 5mm) PLASTIC QFN θJA = 25°C/W (AS MEASURED ON DEMO BOARD DC2247A), θJC = 3.4°C/W EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3922EUFD-1#PBF LT3922EUFD-1#TRPBF 39221 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LT3922IUFD-1#PBF LT3922IUFD-1#TRPBF 39221 28-Lead (4mm × 5mm) Plastic QFN –40°C to 125°C LT3922HUFD-1#PBF LT3922HUFD-1#TRPBF 39221 28-Lead (4mm × 5mm) Plastic QFN –40°C to 150°C Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, VEN/UVLO = 2V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Input Voltage Range 2.8 36 V VIN Pin Quiescent Current VEN/UVLO = 1.5V, Not Switching 2.9 4 mA VEN/UVLO = 0.1V, Shutdown 1 µA EN/UVLO Threshold (Falling) 1.260 1.330 1.400 V EN/UVLO Rising Hysteresis 25 mV EN/UVLO Pin Current VEN/UVLO = 1.2V 2 µA Input OVLO Threshold (Rising) 1.145 1.205 1.265 V Input OVLO Falling Hysteresis 50 mV OVLO Pin Current VOVLO = 1.0V –100 100 nA Rev 0 2 For more information www.analog.com Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS