Datasheet LTC3897-2 (Analog Devices) - 5

LTC3897-2
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, VBIAS = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS BOOST1 and BOOST2 Charge Pump
BOOST Charge Pump Available Output FREQ = 0V, Forced Continuous or Current Pulse-Skipping Mode VSW1,2 = 12V; VBOOST1,2 = 16.5V 70 µA VSW1,2 = 12V; VBOOST1,2 = 19.5V 30 µA
Surge Stopper
SGEN Pin ON Threshold VSGEN Rising l 1.16 1.26 1.36 V SGEN Pin Hysteresis 100 mV SG Pin Output High Voltage (VSG – VCS) VIN = 4.2V, ISG = 0, –1µA, DG – CS = 1V l 4.5 8 V VIN = 8V to 70V, ISG = 0, −1µA l 10 12 16 V SG Pin Pull-Up Current VIN = SG = DG = CS = 12V l –5 –10 –15 µA SG Pin Pull-Down Current Overvoltage: SPFB = 1.5V, SG – CS = 5V l 50 130 mA Overcurrent: ΔVIS = 100mV, SG – CS = 5V l 50 130 mA Shutdown: DGEN = SGEN = 0V, SG – CS = 5V l 0.4 1 mA CS Pin Input Current VIN = CS = 12V, IS+ = IS– = 11.9V, SGEN = Float l 2 6 µA VIN = CS = 12V, SGEN = 0V l 25 100 µA VCS = –30V l –2.5 –3.5 mA VSPFB Regulated Surge Protection Feedback Voltage l 1.205 1.235 1.265 V ΔVIS Overcurrent Fault Threshold, (VIS+ – VIS–) IS– > 2.5V l 45 50 55 mV IS– = 1.5V l 21 27 33 mV IS+ Pin Input Current IS+ = IS– = VIN = CS = 12V, SGEN = DGEN = Float l 35 100 µA IS+ = IS– = VIN = CS = 12V, SGEN = DGEN = 0V l 1 15 µA SPFB Pin Input Current SPFB = 1.235V l ±20 ±500 nA IS– Pin Input Current IS+ = IS– = VIN = CS = 12V, SGEN = DGEN = Float l 20 100 µA IS+ = IS– = VIN = CS = 12V, SGEN = DGEN = 0V l 5 15 µA ITMR,UP TMR Pin Pull-Up Current, Overvoltage TMR = 1V, SPFB = 1.5V, VIN – VIS– = 0.5V l –1.5 –2.5 –3.7 µA TMR = 1V, SPFB = 1.5V, VIN – VIS– = 70V l –43 –53 –63 µA TMR Pin Pull-Up Current, Overcurrent TMR = 1V, ΔVIS = 60mV, VIN – VIS– = 0.5V l –6 –10 –16 µA TMR = 1V, ΔVIS = 60mV, VIN – VIS– = 70V l –210 –250 –290 µA TMR Pin Pull-Up Current, Warning TMR = 1.3V, SPFB = 1.5V, VIN – VIS– = 0.5V l –3 –5 –8 µA TMR Pin Pull-Up Current, Retry TMR = 1V, SPFB = 1.5V l –1.5 –2.5 –3.7 µA ITMR,DN TMR Pin Pull-Down Current TMR = 1V, SPFB = 1.5V, Retry l 1.2 2 2.8 µA SGEN = 0V l 0.4 0.75 1.5 mA Retry Duty Cycle, Overcurrent ΔVIS = 60mV, VIN – VIS– = 12V l 0.06 0.08 0.12 % TMR Pin Thresholds SG Falling, VIN = 4.2V to 70V l 1.31 1.35 1.38 V SG Rising (after 32 cycles), VIN = 4.2V to 70V l 0.13 0.15 0.18 V
Ideal Diode
DGEN Pin ON Threshold VDGEN Rising l 1.16 1.26 1.36 V DGEN Pin Hysteresis 100 mV DG Pin Output High Voltage, (VDG − VCS) VIN = 4.2V, IDG = 0, −1µA, No Fault, SG Open l 4.5 V 8V < VIN < 70V, IDG = 0, −1µA, No Fault, SG l 10 12 16 V Open DG Pin Pull-Up Current DG = CS = VIN = 12V, CS – IS+ = 0.1V l –5 –10 –15 µA Rev. A For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts