Datasheet LTC3721-1 (Analog Devices) - 2

LTC3721-1
W W W U ABSOLUTE AXI U RATI GS (Note 1)
VCC to GND (Low Impedance Source) ...– 0.3V to 10V VREF Output Current ... Self-Regulated (Chip Self-Regulates at 10.3V) Operating Temperature (Notes 5,6) UVLO to GND ... – 0.3V to VCC LTC3721-1 ... – 40°C to 85°C All Other Pins to GND Storage Temperature Range ... – 65°C to 125°C (Low Impedance Source) ...– 0.3V to 5.5V Lead Temperature (GN Package only) VCC (Current Fed) ... 40mA (Soldering, 10sec) .. 300°C
U W U PACKAGE/ORDER I FOR ATIO
TOP VIEW ORDER PART TOP VIEW ORDER PART V 1 16 REF NC NUMBER NUMBER REF NC V UVLO SS NC 2 15 UVLO LTC3721EGN-1 16 15 14 13 LTC3721EUF-1 NC 3 14 SS DRVB 1 12 FB DRVB 4 13 FB V 2 11 CC RLEB 17 V 5 12 CC RLEB DRVA 3 10 COMP DRVA 6 11 COMP PGND CS GN PART 4 9 UF PART GND 7 10 CS 5 6 7 8 MARKING T MARKING C 8 9 T DPRG C NC SGND DPRG GN PACKAGE 37211 UF PACKAGE 37211 16-LEAD PLASTIC SSOP 16-LEAD (4mm × 4mm) PLASTIC QFN TJMAX = 125°C, θJA = 100°C/W TJMAX = 125°C, θJA = 100°C/W EXPOSED PAD IS GND (PIN17) MUST BE SOLDERED TO PCB Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 9.5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply
VCCUV VCC Undervoltage Lockout Measured on VCC 10.25 10.7 V VCCHY VCC UVLO Hysteresis Measured on VCC 3.8 4.2 V ICCST Start-Up Current VCC = VUVLO – 0.3V ● 145 230 µA ICCRN Operating Current No Load on Outputs 3 6 mA VSHUNT Shunt Regulator Voltage Current into VCC = 10mA 10.3 10.8 V RSHUNT Shunt Resistance Current into VCC = 10mA to 17mA 1.4 3.5 Ω SUVLO System UVLO Threshold Measured on UVLO Pin, 10mA into VCC 4.8 5.0 5.2 V SHYST System UVLO Hysteresis Current Current Flows Out of UVLO Pin, 10mA into VCC 8.5 10 11.5 µA sn37211 37211fs 2