LTC4365 - Overvoltage, Undervoltage and Reverse …

1 LTC436514365faFor more information applicaTion FeaTuresDescripTion overvoltage , Undervoltage and Reverse Supply Protection Controller12V Automotive ApplicationapplicaTionsn Wide Operating Voltage Range: to 34Vn overvoltage Protection to 60Vn Reverse Supply Protection to 40Vn LTC4365 : Blocks 50Hz and 60Hz AC Powern LTC4365 -1: Fast (1ms) Recovery from Faultn No Input Capacitor or TVS Required for Most Applicationsn Adjustable Undervoltage and overvoltage Protection Rangen Charge Pump Enhances External N-Channel MOSFETn Low Operating Current: 125 An Low Shutdown Current.

2 10 An Compact 8-Lead, 3mm 2mm DFN and TSOT-23 (ThinSOT ) Packagesn Portable Instrumentationn Industrial Automationn Laptopsn Automotive Surge ProtectionL, LT, LT C, LT M, Linear Technology and the Linear logo are registered trademarks and ThinSOT and Hot Swap are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Load Protected from Reverse and overvoltage at VINThe LT C 4365 protects applications where power supply input voltages may be too high, too low or even negative. It does this by controlling the gate voltages of a pair of external N-channel MOSFETs to ensure that the output stays within a safe operating LTC4365 can withstand voltages between 40V and 60V and has an operating range of to 34V, while consuming only 125 A in normal o comparator inputs allow configuration of the over-voltage (OV) and Undervoltage (UV) set points using an external resistive divider.

3 A shutdown pin provides external control for enabling and disabling the MOSFETs as well as placing the device in a low current shutdown state. A fault output provides status of the gate pin pulling low. A fault is indicated when the part is in shutdown or the input voltage is outside the UV and OV set LTC4365 has a 36ms turn-on delay that debounces live connections and blocks 50Hz to 60Hz AC power. For fast recovery after faults, the LTC4365 -1 has a reduced 1ms turn-on delay. 30 VGND10V/DIV30V4365 TA01b1s/DIVUV = = 18 VVOUTVOUTVINVINVALIDWINDOWVINUVOVSHDNOV = 18 VUV = TA01aVOUTFAULTGATEVIN12 VVOUT3 ASi4946 GNDLTC4365510k1820k243k59kLTC436524365fa For more information conFiguraTionabsoluTe MaxiMuM raTingsSupply Voltage (Note 1) VIN.

4 40V to 60 VInput Voltages (Note 3) UV, SHDN .. to 60V OV .. to 6V to 40 VOutput Voltages (Note 4) FAULT .. to 60V GATE .. 40V to 45V TOP VIEW9 GNDDDB PACKAGE8-LEAD (3mm 2mm) PLASTIC DFN56784321 GNDOVUVVINSHDNFAULTVOUTGATE TJMAX = 150 C, JA = 76 C/W EXPOSED PAD (PIN 9) PCB GROUND CONNECTION OPTIONAL 12348765 TOP VIEWTS8 PACKAGE8-LEAD PLASTIC TSOT-23 GATEVOUTFAULTSHDNVINUVOVGND TJMAX = 150 C, JA = 195 C/WInput Currents UV, OV, SHDN .. 1mAOperating Ambient Temper atur e Range LTC4365C ..0 C to 70 C LTC4365I .. 40 C to 85 C LTC4365H.

5 40 C to 125 CStorage Temper atur e Range .. 65 C to 150 CLead Temper atur e (Soldering, 10 sec) for TSOT Only ..300 CLTC436534365faFor more information Free FinishTAPE AND REEL (MINI)TAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELTC4365 CDDB#TRMPBFLTC4365 CDDB#TRPBFLFKS8-Lead (3mm 2mm) Plastic DFN0 C to 70 CLTC4365 CDDB-1#TRMPBFLTC4365 CDDB-1#TRPBFLGMB8-Lead (3mm 2mm) Plastic DFN0 C to 70 CLTC4365 IDDB#TRMPBFLTC4365 IDDB#TRPBFLFKS8-Lead (3mm 2mm) Plastic DFN 40 C to 85 CLTC4365 IDDB-1#TRMPBFLTC4365 IDDB-1#TRPBFLGMB8-Lead (3mm 2mm) Plastic DFN 40 C to 85 CLTC4365 HDDB#TRMPBFLTC4365 HDDB#TRPBFLFKS8-Lead (3mm 2mm)

6 Plastic DFN 40 C to 125 CLTC4365 HDDB-1#TRMPBFLTC4365 HDDB-1#TRPBFLGMB8-Lead (3mm 2mm) Plastic DFN 40 C to 125 CLTC4365 CTS8#TRMPBFLTC4365 CTS8#TRPBFLTFKT8-Lead Plastic TSOT-230 C to 70 CLTC4365 CTS8-1#TRMPBFLTC4365 CTS8-1#TRPBFLTGKZ8-Lead Plastic TSOT-230 C to 70 CLTC4365 ITS8#TRMPBFLTC4365 ITS8#TRPBFLTFKT8-Lead Plastic TSOT-23 40 C to 85 CLTC4365 ITS8-1#TRMPBFLTC4365 ITS8-1#TRPBFLTGKZ8-Lead Plastic TSOT-23 40 C to 85 CLTC4365 HTS8#TRMPBFLTC4365 HTS8#TRPBFLTFKT8-Lead Plastic TSOT-23 40 C to 125 CLTC4365 HTS8-1#TRMPBFLTC4365 HTS8-1#TRPBFLTGKZ8-Lead Plastic TSOT-23 40 C to 125 CTRM = 500 pieces.

7 *Temperature grades are identified by a label on the shipping LT C Marketing for parts specified with wider operating temperature ranges. Consult LT C Marketing for information on lead based finish more information on lead free part marking, go to: For more information on tape and reel specifications, go to: characTerisTicsSYMBOLPARAMETERCONDITIONS MINTYPMAXUNITSVIN, VOUTVINI nput Voltage RangeOperating Range Protection Rangel 40 34 60V VIVINI nput Supply CurrentSHDN = 0V, VIN = VOUT, 40 C to 85 C SHDN = 0V, VIN = VOUT, 40 C to 125 C SHDN = l l10 10 2550 100 150 A A AIVIN(R) Reverse Input Supply CurrentVIN = 40V, VOUT = 0Vl (UVLO)Input Supply Undervoltage LockoutVIN Input CurrentSHDN = 0V, VIN = VOUT SHDN = , VIN = VOUT VIN = 40V, VOUT = 0Vl l l6 100 2030 250 50 A A AGATE VGATEN-Channel Gate Drive (GATE-VOUT)

8 VIN = VOUT = , IGATE = 1 A VIN = VOUT = 12V to 34V, IGATE = 1 Al l3 VIGATE(UP)N-Channel Gate Pull Up CurrentGATE = VIN = VOUT = 12Vl 12 20 30 AIGATE(FAST)N- Channel Gate Fast Pull Down CurrentFast Shutdown, GATE = 20V, VIN = VOUT = 12Vl315072mAIGATE(SLOW)N-Channel Gate Gentle Pull Down CurrentGentle Shutdown, GATE = 20V, VIN = VOUT = 12Vl5090150 AtGATE(FAST)N-Channel Gate Fast Turn Off DelayCGATE = , UV or OV Faultl24 stGATE(SLOW)N-Channel Gentle Turn Off DelayCGATE = , SHDN Falling, VIN = VOUT = 12Vl150250350 s The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C.

9 VIN = to 34V, unless otherwise noted. (Note 2)orDer inForMaTionLTC436544365faFor more information Recovery Delay TimeVIN = 12V, Power Good to VGATE > 0V LTC4365 , CGATE = LTC4365 -1, CGATE = l l 26 36 1 49 ms msUV, OVVUVUV Input Threshold VoltageUV Falling VGATE = Input Threshold VoltageOV Rising VGATE = Input Hysteresisl202532mVVOVHYSTOV Input Hysteresisl202532mVILEAKUV, OV Leakage CurrentV = , VIN = 34Vl 10nAtFAULTUV, OV Fault Propagation DelayOverdrive = 50mV VIN = VOUT = 12Vl12 sSHDNVSHDNSHDN Input ThresholdSHDN Falling to VGATE = Input CurrentSHDN =.

10 VIN = 34Vl 10nAtSTARTD elay Coming Out of Shutdown ModeSHDN Rising to VGATE > 0V, VIN = VOUT = 12Vl4008001200 stSHDN(F)SHDN to FAULT AssertedVIN = VOUT = stLOWPWRD elay from Turn Off to Low Power OperationVIN = VOUT = 12V LTC4365 LTC4365 -1 l l 26 36 55 2 ms msFAULTVOLFAULT Output Voltage LowIFAULT = 500 Leakage CurrentFAULT = 5V, VIN = 34Vl 20nANote 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2.