Datasheet LTM4647 (Analog Devices) - 3

LTM4647
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal 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
VIN Input DC Voltage VIN = 4.7V to 6V per Figure 24 Schematic l 4.7 15 V VIN = 6V to 15V per Figure 23 Schematic VOUT(RANGE) Output Voltage Range VIN = 4.7V to 15V l 0.6 1.8 V VOUT(DC) Output Voltage, Total Variation CIN = 22µF × 4, COUT = 100µF Ceramic, 470µF POSCAP, 1.196 1.200 1.204 V with Line and Load RFB = 60.4k, MODE = GND,VIN = 4.7V to 15V, IOUT = 0A to 30A l 1.186 1.200 1.214 V
Input Specifications
IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.2V, Burst Mode Operation, IOUT = 0A 11 mA VIN = 12V, VOUT = 1.2V, Pulse-Skipping Mode, IOUT = 0A 22 mA VIN = 12V, VOUT = 1.2V, Switching Continuous, IOUT = 0A 130 mA Shutdown, RUN = 0, VIN = 12V 90 µA IS(VIN) Input Supply Current VIN = 12V, VOUT = 1.2V, IOUT = 30A 3.6 A
Output Specifications
IOUT(DC) Output Continuous Current VIN = 12V, VOUT = 1.2V (Note 4) 0 30 A Range ∆VOUT(LINE)/VOUT Line Regulation Accuracy VOUT = 1.2V, VIN from 4.7V to 15V, IOUT = 0A l 0.005 0.02 %/V ∆VOUT(LOAD)/ VOUT Load Regulation Accuracy VOUT = 1.2V, IOUT = 0A to 30A, VIN = 12V (Note 4) l 0.1 0.3 % VOUT(AC) Output Ripple Voltage COUT = 100µF Ceramic × 6, 15 mV VIN = 12V, VOUT = 1.2V, IOUT = 0A ∆VOUT(START) Turn-On Overshoot COUT = 100µF Ceramic × 6, 20 mV VIN = 12V, VOUT = 1.2V, IOUT = 0A tSTART Turn-On Time COUT = 100µF Ceramic × 6 5 ms VIN = 12V, VOUT = 1.2V, No Load, TRACK/SS = 0.01µF ∆VOUTLS Peak Deviation for Dynamic Load: 0% to 50% to 0% of Full Load, 36 mV Load COUT = 100µF Ceramic × 6, VIN = 12V, VOUT = 1.2V tSETTLE Settling Time for Dynamic Load: 0% to 50% to 0% of Full Load, 15 µs Load Step COUT = 100µF Ceramic × 6, VIN = 12V, VOUT = 1.2V IOUTPK Output Current Limit VIN = 12V, VOUT = 1.2V 34 A
Control Specifications
VFB Voltage at VFB Pin IOUT = 0A, VOUT = 1.2V 597.5 600 602.5 mV l 595 600 605 IFB Current at VFB Pin (Note 7) –30 –100 nA ITRACK/SS Track Pin Soft-Start Pull-Up TRACK/SS = 0V 1.25 µA Current tON(MIN) Minimum On-Time (Notes 3, 7) 90 ns RFBHI Resistor Between VOUT_LCL 60.05 60.40 60.75 kΩ and VFB Pins VRUN RUN Pin On Threshold VRUN Rising 1.2 1.35 1.45 V VRUNHYS RUN Pin On Hysteresis 180 mV UVLO Undervoltage Lockout VINTVCC Falling 4 V UVLOHYS UVLO Hysteresis 300 mV VHIZB HIZB Pin On Threshold VHIZB Rising 2.3 V VHIZBHYS HIZB Pin On Hysteresis 800 mV 4647fb For more information www.linear.com/LTM4647 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications