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LTC4352 Datasheet(PDF) 3 Page - Linear Technology |
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LTC4352 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 22 page  LTC4235 3 4235f For more information www.linear.com/LTC4235 elecTrical characTerisTics Note 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 lifetime. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Supplies VIN Input Supply Range l 9 14 V IIN Input Supply Current l 2.7 4 mA VINTVCC Internal Regulator Voltage I = 0, –500µA l 4.5 5 5.5 V VINTVCC(UVL) Internal VCC Undervoltage Lockout INTVCC Rising l 2.1 2.2 2.3 V ∆VINTVCC(HYST) Internal VCC Undervoltage Lockout Hysteresis l 30 60 90 mV Ideal Diode Control ∆VFWD(REG) Forward Regulation Voltage (VINn – VSENSE+) l 2 15 28 mV ∆VDGATE External N-Channel Gate Drive (VDGATEn – VINn) ∆VFWD = 0.15V; I = 0, –1µA l 10 12 14 V ICPO(UP) CPOn Pull-Up Current CPO = IN = 12V l –50 –90 –120 µA IDGATE(FPU) DGATEn Fast Pull-Up Current ∆VFWD = 0.2V, ∆VDGATE = 0V, CPO = 17V –1.5 A IDGATE(FPD) DGATEn Fast Pull-Down Current ∆VFWD = –0.2V, ∆VDGATE = 5V 1.5 A IDGATE2(DN) DGATE2 Off Pull-Down Current D2OFF = 2V, ∆VDGATE2 = 2.5V l 50 100 200 µA tON(DGATE) DGATEn Turn-On Delay ∆VFWD = 0.2V , CDGATE = 10nF l 0.25 0.5 µs tOFF(DGATE) DGATEn Turn-Off Delay ∆VFWD = –0.2V, CDGATE = 10nF l 0.2 0.5 µs tPLH(DGATE2) D2OFF Low to DGATE2 High l 50 100 µs Hot Swap Control ∆VSENSE(TH) Current Limit Sense Voltage Threshold (VSENSE+ – VSENSE–) OUT = 11V OUT = 0V l l 22.5 5.8 25 8.3 27.5 10.8 mV mV VSENSE+(UVL) SENSE+ Undervoltage Lockout SENSE+ Rising l 1.8 1.9 2 V ∆VSENSE+(HYST) SENSE+ Undervoltage Lockout Hysteresis l 10 50 90 mV ISENSE+ SENSE+ Pin Current SENSE+ = 12V l 0.3 0.8 1.3 mA ISENSE– SENSE– Pin Current SENSE– = 12V l 10 40 100 µA ∆VHGATE External N-Channel Gate Drive (VHGATE – VOUT) I = 0, –1µA l 10 12 14 V ∆VHGATE(H) Gate High Threshold (VHGATE – VOUT) l 3.6 4.2 4.8 V IHGATE(UP) External N-Channel Gate Pull-Up Current Gate Drive On, HGATE = 0V l –7 –10 –13 µA IHGATE(DN) External N-Channel Gate Pull-Down Current Gate Drive Off, OUT = 12V, HGATE = OUT + 5V l 1 2 4 mA IHGATE(FPD) External N-Channel Gate Fast Pull-Down Current Fast Turn-Off, OUT = 12V, HGATE = OUT + 5V l 100 200 350 mA VOUT(PGTH) OUT Power Good Threshold OUT Rising l 10.2 10.5 10.8 V ∆VOUT(PGHYST) OUT Power Good Hysteresis l 110 170 240 mV tPHL(SENSE) Sense Voltage (SENSE+ – SENSE–) High to HGATE Low ∆VSENSE = 200mV, CHGATE = 10nF l 0.5 1 µs tOFF(HGATE) ON Low to HGATE Low EN High to HGATE Low SENSE+ Low to HGATE Low SENSE+ UVLO l l l 10 20 10 20 40 20 µs µs µs tD(HGATE) ON High, EN Low to HGATE Turn-On Delay l 50 100 150 ms tP(HGATE) ON to HGATE Propagation Delay ON = Step 0.8V to 2V l 10 20 µs The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise noted. |
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Similar Description - LTC4352 |
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