Datasheet LTM4622A (Analog Devices) - 3

link to page 24 LTM4622A
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal operating temperature range (Note 2). Specified as each individual output channel at TA = 25°C, VIN1 = VIN2 = 12V, unless otherwise noted per the typical application shown in Figure 27. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Section: per Channel
VIN1 Input DC Voltage Range l 3.6 20 V VIN2 Input DC Voltage Range 3.6V < VIN1 < 20V l 1.5 20 V VOUT(RANGE) Output Voltage Range VIN1 = VIN2 = 3.6V to 20V l 1.5 12 V VOUT(DC) Output Voltage, Total Variation CIN = 22µF, COUT = 100µF Ceramic, RFB = 40.2k, l 1.477 1.50 1.523 V with Line and Load MODE = INTVCC,VIN1 = VIN2 = 3.6V to 20V, IOUT = 0A to 2A VRUN RUN Pin On Threshold RUN Threshold Rising 1.20 1.27 1.35 V RUN Threshold Falling 0.97 1.00 1.03 V IQ(VIN) Input Supply Bias Current VIN1 = VIN2 = 12V, VOUT = 1.5V, MODE = GND 7 mA VIN1 = VIN2 = 12V, VOUT = 1.5V, MODE = INTVCC 500 µA Shutdown, RUN1 = RUN2 = 0 45 µA IS(VIN) Input Supply Current VIN1 = VIN2 = 12V, VOUT = 1.5V, IOUT = 2A 0.32 A IOUT(DC) Output Continuous Current Range VIN1 = VIN2 = 12V, VOUT = 1.5V (Note 3) l 0 2 A ΔVOUT(Line)/VOUT Line Regulation Accuracy VOUT = 1.5V, VIN1 = VIN2 = 3.6V to 20V, IOUT = 0A l 0.01 0.1 %/V ΔVOUT(Load)/VOUT Load Regulation Accuracy VOUT = 1.5V, IOUT = 0A to 2A l 0.2 1.0 % VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF Ceramic, VIN1 = VIN2 = 12V, 5 mV VOUT = 1.5V ΔVOUT(START) Turn-On Overshoot IOUT = 0A, COUT = 100µF Ceramic, VIN1 = VIN2 = 12V, 30 mV VOUT = 1.5V tSTART Turn-On Time COUT = 100µF Ceramic, No Load, TRACK/SS = 0.01µF, 1.25 ms VIN1 = VIN2 = 12V, VOUT = 1.5V ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 100µF 100 mV Ceramic, VIN1 = VIN2 = 12V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load Load: 0% to 50% to 0% of Full Load, COUT = 100µF 20 µs Step Ceramic, VIN1 = VIN2 = 12V, VOUT = 1.5V IOUTPK Output Current Limit VIN1 = VIN2 = 12V, VOUT = 1.5V 3 4 A VFB Voltage at FB Pin IOUT = 0A, VOUT = 1.5V l 0.592 0.60 0.608 V IFB Current at FB Pin (Note 4) ±30 nA RFBHI Resistor Between VOUT and FB Pins 60.00 60.40 60.80 kΩ ITRACK/SS Track Pin Soft-Start Pull-Up Current TRACK/SS = 0V 1.25 µA tSS Internal Soft-Start Time 10% to 90% Rise Time (Note 4) 400 700 μs tON(MIN) Minimum On-Time (Note 4) 20 ns tOFF(MIN) Minimum Off-Time (Note 4) 45 ns VPGOOD PGOOD Trip Level VFB With Respect to Set Output VFB Ramping Negative –8 –14 % VFB Ramping Positive 8 14 % RPGOOD PGOOD Pull-Down Resistance 1mA Load 20 Ω VINTVCC Internal VCC Voltage VIN1 = VIN2 = 3.6V to 20V 3.1 3.3 3.5 V Rev B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Safety Considerations Layout Checklist/Example Package Description Package Photos Design Resources Related Parts