Datasheet LTC3867 (Analog Devices) - 4

LTC3867
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 = 15V, VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VPG1(HYST) PGOOD Trip Level Hysteresis 2 % VPG2 PGOOD 2nd Trip Level—No Delay VFB with Respect to Set Output Voltage VFB Ramping Up 17 % VFB Ramping Down –25 % VPG2(HYST) PGOOD 2nd Trip Level Hysteresis 5 %
INTVCC Linear Regulator
VINTVCC Linear Regulator Voltage 6V < VIN < 38V 5.1 5.3 5.5 V VLDO INT INTVCC Load Regulation ICC = 0mA to 20mA 0.5 2 % VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive 4.5 4.7 V VLDO EXT EXTVCC Voltage Drop ICC = 20mA, VEXTVCC = 5V 50 70 mV VLDO(HYS) EXTVCC Hysteresis 200 mV
Differential Amplifier
VDA DIFF+ Accuracy Measured in a Servo Loop with EA in Loop ITH =1.2V, 0°C to 85°C 595.5 600 604.5 mV ITH =1.2V, –40°C to 125°C l 594 600 606 mV IDIFF+ Input Bias Current DIFF+ to SGND –200 200 nA f0dB DA Unity-Gain Crossover Frequency (Note 7) 4 MHz IOUT(SINK) Maximum Sinking Current DIFFOUT = 600mV 100 µA IOUT(SOURCE) Maximum Sourcing Current DIFFOUT = 600mV 500 µA
Oscillator and Phase-Locked Loop
fOSC Oscillator Frequency RFREQ < 23.2kΩ 150 kHz RFREQ = 30.1kΩ 250 kHz RFREQ = 47.5kΩ 600 kHz RFREQ = 54.9kΩ 750 kHz RFREQ = 75.0kΩ 1.05 MHz Maximum Frequency 1.2 MHz Minimum Frequency 0.2 MHz IFREQ FREQ Pin Output Current VFREQ = 0.8V 19 20 21 µA RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ
On-Chip Driver
TG RUP TG Pull-Up RDS(ON) TG High 2.6 Ω TG RDOWN TG Pull-Down RDS(ON) TG Low 1.5 Ω BG RUP BG Pull-Up RDS(ON) BG High 2.4 Ω BG RDOWN BG Pull-Down RDS(ON) BG Low 1.1 Ω 3867f 4 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Package Description Typical Application Related Parts