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LTC1629C Datasheet(PDF) 3 Page - Linear Technology |
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LTC1629C Datasheet(HTML) 3 Page - Linear Technology |
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3 / 28 page  3 LTC1629/LTC1629-PG SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS = 5V unless otherwise noted. ISENSE Total Sense Pins Source Current Each Channel; VSENSE1–, 2– = VSENSE1+, 2+ = 0V – 85 – 60 µA DFMAX Maximum Duty Factor In Dropout 98 99.5 % Top Gate Transition Time: TG1, 2 tr Rise Time CLOAD = 3300pF 30 90 ns TG1, 2 tf Fall Time CLOAD = 3300pF 40 90 ns Bottom Gate Transition Time: BG1, 2 tr Rise Time CLOAD = 3300pF 30 90 ns BG1, 2 tf Fall Time CLOAD = 3300pF 20 90 ns TG/BG t1D Top Gate Off to Bottom Gate On Delay Synchronous Switch-On Delay Time CLOAD = 3300pF Each Driver 90 ns BG/TG t2D Bottom Gate Off to Top Gate On Delay Top Switch-On Delay Time CLOAD = 3300pF Each Driver 90 ns tON(MIN) Minimum On-Time Tested with a Square Wave (Note 6) 180 ns Internal VCC Regulator VINTVCC Internal VCC Voltage 6V < VIN < 30V; VEXTVCC = 4V 4.8 5.0 5.2 V VLDO INT INTVCC Load Regulation ICC = 0 to 20mA; VEXTVCC = 4V 0.2 1.0 % VLDO EXT EXTVCC Voltage Drop ICC = 20mA; VEXTVCC = 5V; LTC1629 120 240 mV ICC = 20mA; VEXTVCC = 5V; LTC1629-PG 80 160 mV VEXTVCC EXTVCC Switchover Voltage ICC = 20mA, EXTVCC Ramping Positive q 4.5 4.7 V VLDOHYS EXTVCC Switchover Hysteresis ICC = 20mA, EXTVCC Ramping Negative 0.2 V Oscillator and Phase-Locked Loop fNOM Nominal Frequency VPLLFLTR = 1.2V 190 220 250 kHz fLOW Lowest Frequency VPLLFLTR = 0V 120 140 160 kHz fHIGH Highest Frequency VPLLFLTR ≥ 2.4V 280 310 360 kHz RPLLIN PLLIN Input Resistance 50 k Ω IPLLFLTR Phase Detector Output Current Sinking Capability fPLLIN < fOSC –15 µA Sourcing Capability fPLLIN > fOSC 15 µA RRELPHS Controller 2-Controller 1 Phase VPHASMD = 0V, Open 180 Deg VPHASMD = 5V 240 Deg CLKOUT Phase (Relative to Controller 1) VPHASMD = 0V 60 Deg VPHASMD = Open 90 Deg VPHASMD = 5V 120 Deg CLKHIGH Clock High Output Voltage 4 V CLKLOW Clock Low Output Voltage 0.2 V PGOOD Output (LTC1629-PG Only) VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 µA VPG PGOOD Trip Level, Either Controller VEAIN with Respect to Set Output Voltage VEAIN Ramping Negative – 6 – 7.5 – 9.5 % VEAIN Ramping Positive 6 7.5 9.5 % Differential Amplifier/Op Amp Gain Block (Note 5) ADA Gain Differential Amp Mode 0.995 1 1.005 V/V CMRRDA Common Mode Rejection Ratio Differential Amp Mode; 0V < VCM < 5V 46 55 dB RIN Input Resistance Differential Amp Mode; Measured at VOS+ Input 80 k Ω |
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