Datasheet LTC3807 (Analog Devices) - 4

LTC3807
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, VRUN = 5V, EXTVCC = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Gate Driver
TG Pull-Up On-Resistance 2.5 Ω TG Pull-Down On-Resistance 1.5 Ω BG Pull-Up On-Resistance 2.4 Ω BG Pull-Down On-Resistance 1.1 Ω TG Transition Time: (Note 6) Rise Time CLOAD = 3300pF 25 ns Fall Time CLOAD = 3300pF 16 ns BG Transition Time: (Note 6) Rise Time CLOAD = 3300pF 25 ns Fall Time CLOAD = 3300pF 13 ns Top Gate Off to Bottom Gate On Delay CLOAD = 3300pF 30 ns Synchronous Switch-On Delay Time Bottom Gate Off to Top Gate On Delay CLOAD = 3300pF 30 ns Top Switch-On Delay Time tON(MIN) Minimum On-Time (Note 7) 95 ns
INTVCC Linear Regulator
Internal VCC Voltage 6V < VIN < 38V, VEXTVCC = 0V 4.85 5.1 5.35 V INTVCC Load Regulation ICC = 0mA to 50mA, VEXTVCC = 0V 0.7 1.1 % Internal VCC Voltage 6V < VEXTVCC < 13V 4.85 5.1 5.35 V INTVCC Load Regulation ICC = 0mA to 50mA, 0.6 1.1 % VEXTVCC = 8.5V EXTVCC Switchover Voltage ICC = 0mA to 50mA, 4.5 4.7 4.9 V EXTVCC Ramping Positive EXTVCC Hysteresis 250 mV
Oscillator and Phase-Locked Loop
Programmable Frequency RFREQ = 25k; 105 kHz PLLIN/MODE = DC Voltage Programmable Frequency RFREQ = 65k; 375 440 505 kHz PLLIN/MODE = DC Voltage Programmable Frequency RFREQ =105k; 835 kHz PLLIN/MODE = DC Voltage Low Fixed Frequency VFREQ = 0V; 320 350 380 kHz PLLIN/MODE = DC Voltage High Fixed Frequency VFREQ = INTVCC; 485 535 585 kHz PLLIN/MODE = DC Voltage Synchronizable Frequency PLLIN/MODE = External Clock l 75 750 kHz
PGOOD Output
PGOOD Voltage Low IPGOOD = 2mA 0.2 0.4 V 3807fa 4 For more information www.linear.com/LTC3807 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Related Parts