Datasheet LTM4644, LTM4644-1 (Analog Devices) - 3

LTM4644/LTM4644-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, per the typical application. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Section: per Channel
VIN, SVIN Input DC Voltage SVIN = VIN l 4 14 V VOUT(RANGE) Output Voltage Range l 0.6 5.5 V VOUT(DC) Output Voltage, Total Variation CIN = 22µF, COUT = 100µF Ceramic, with Line and Load MODE = INTVCC,VIN = 4V to 14V, IOUT = 0A to 4A (Note 4) l 1.477 1.50 1.523 V LTM4644: RFB(BOT) = 40.2k LTM4644-1: RFB(TOP) = 60.4k, RFB(BOT) = 40.2k VRUN RUN Pin On Threshold VRUN Rising 1.1 1.2 1.3 V IQ(SVIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, MODE = INTVCC 6 mA VIN = 12V, VOUT = 1.5V, MODE = GND 2 mA Shutdown, RUN = 0, VIN = 12V 11 µA IS(VIN) Input Supply Current VIN = 12V, VOUT = 1.5V, IOUT = 4A 0.62 A IOUT(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 4) 0 4 A ΔVOUT (Line)/VOUT Line Regulation Accuracy VOUT = 1.5V, VIN = 4V to 14V, IOUT = 0A l 0.04 0.15 %/V ΔVOUT (Load)/VOUT Load Regulation Accuracy VOUT = 1.5V, IOUT = 0A to 4A l 0.5 1 % VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF Ceramic, VIN = 12V, 5 mV VOUT = 1.5V ΔVOUT(START) Turn-On Overshoot IOUT = 0A, COUT = 100µF Ceramic, VIN = 12V, 30 mV VOUT = 1.5V tSTART Turn-On Time COUT = 100µF Ceramic, No Load, TRACK/SS = 0.01µF, 2.5 ms VIN = 12V, VOUT = 1.5V ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 47µF 160 mV Ceramic, VIN = 12V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 47µF 40 µs Step Ceramic, VIN = 12V, VOUT = 1.5V IOUTPK Output Current Limit VIN = 12V, VOUT = 1.5V 6 7 A VFB Voltage at FB Pin IOUT = 0A, VOUT = 1.5V, 0°C to 125°C 0.594 0.60 0.606 V IOUT = 0A, VOUT = 1.5V, –40°C to 125°C l 0.592 0.60 0.608 V IFB Current at FB Pin (Note 3) ±30 nA RFBHI Resistor Between VOUT and FB LTM4644 Only 60.05 60.40 60.75 kΩ Pins ITRACK/SS Track Pin Soft-Start Pull-Up TRACK/SS = 0V 2.5 4 µA Current VIN(UVLO) VIN Undervoltage Lockout VIN Falling 2.4 2.6 2.8 V VIN Hysteresis 350 mV tON(MIN) Minimum On-Time (Note 3) 40 ns tOFF(MIN) Minimum Off-Time (Note 3) 70 ns VPGOOD PGOOD Trip Level VFB With Respect to Set Output VFB Ramping Negative –13 –10 –7 % VFB Ramping Positive 7 10 13 % IPGOOD PGOOD Leakage 2 µA VPGL PGOOD Voltage Low IPGOOD = 1mA 0.02 0.1 V VINTVCC Internal VCC Voltage SVIN = 4V to 14V 3.2 3.3 3.4 V VINTVCC Load Reg INTVCC Load Regulation ICC = 0mA to 20mA 0.5 % fOSC Oscillator Frequency 1 MHz CLKIN CLKIN Threshold 0.7 V Rev. G For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts