Datasheet LTM4637 (Analog Devices) - 3

LTM4637
e lecTrical characTerisTics The
l
denotes the specifications which apply over the specified internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C. VIN = 12V, per the typical application in Figure 22. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input DC Voltage l 4.5 20 V VOUT Range VOUT Range l 0.6 5.5 V VOUT(DC) Output Voltage, Total CIN = 22µF × 3 l 1.477 1.50 1.523 V Variation with Line and Load COUT = 100µF Ceramic, 470µF POSCAP RFB = 40.2k, MODE_PLLIN = GND VIN = 5V to 20V, IOUT = 0A to 20A (Note 4)
Input Specifications
VRUN RUN Pin On Threshold VRUN Rising 1.1 1.25 1.4 V VRUNHYS RUN Pin On Hysteresis 130 mV IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, Burst Mode Operation, IOUT = 0.1A 17 mA VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode, IOUT = 0.1A 25 mA VIN = 12V, VOUT = 1.5V, Switching Continuous, IOUT = 0.1A 54 mA Shutdown, RUN = 0, VIN = 12V 40 µA IS(VIN) Input Supply Current VIN = 5V, VOUT = 1.5V, IOUT = 20A 6.8 A VIN = 12V, VOUT = 1.5V, IOUT = 20A 2.87 A
Output Specifications
IOUT(DC) Output Continuous Current VIN = 12V, VOUT = 1.5V (Note 4) 0 20 A Range ∆VOUT (Line) Line Regulation Accuracy VOUT = 1.5V, VIN from 4.5V to 20V l 0.02 0.06 %/V VOUT IOUT = 0A ∆VOUT (Load) Load Regulation Accuracy VOUT = 1.5V, IOUT = 0A to 20A, VIN = 12V (Note 4) l 0.2 0.45 % VOUT VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF Ceramic, 470µF POSCAP 30 mVP-P VIN = 12V, VOUT = 1.5V ∆VOUT(START) Turn-On Overshoot COUT = 100µF Ceramic, 470µF POSCAP, 15 mV VOUT = 1.5V, IOUT = 0A, VIN = 12V tSTART Turn-On Time COUT = 100µF Ceramic, 470µF POSCAP, 0.6 ms No Load, TRACK/SS = 0.001µF, VIN = 12V ∆VOUTLS Peak Deviation for Dynamic Load: 0% to 50% to 0% of Full Load 50 mV Load COUT = 100µF × 2 Ceramic, 470µF × 3 POSCAP, VIN = 12V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load: 0% to 50% to 0% of Full Load, VIN = 5V, 50 µs Load Step COUT = 100µF × 2 Ceramic, 470µF × 3 POSCAP IOUTPK Output Current Limit VIN = 12V, VOUT = 1.5V 30 A VIN = 5V, VOUT = 1.5V 30 A
Control Section
VFB Voltage at VFB Pin IOUT = 0A, VOUT = 1.5V l 0.594 0.60 0.606 V IFB Current at VFB Pin (Note 7) –12 –25 nA VOVL Feedback Overvoltage l 0.65 0.67 0.69 V Lockout ITRACK/SS Track Pin Soft-Start Pull-Up TRACK/SS = 0V 1.0 1.2 1.4 µA Current tON(MIN) Minimum On-Time (Note 3) 100 ns RFBHI Resistor Between VOUT_LCL 60.05 60.40 60.75 kΩ and VFB Pins
Remote Sense Amplifier
V + OSNS , Common Mode Input Range VIN = 12V, Run > 1.4V 0 3.6 V VOSNS– CM RANGE VDIFF_OUT(MAX) Maximum DIFF_OUT IDIFF_OUT = 300µA INTVCC – 1.4 V Voltage 4637fc For more information www.linear.com/LTM4637 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package PHOTO Typical Application Related Parts Design Resources