Datasheet LTM4619 (Analog Devices) - 3

LTM4619
elecTrical characTerisTics The
l
denotes the specifications which apply over the full internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application in Figure 19. Specified as each channel. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IINRUSH(VIN) Input Inrush Current at Start-Up IOUT = 0A, CIN = 10µF, COUT = 100µF, VOUT = 2.5V VIN = 12V 0.25 A IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT1 = 2.5V, Switching Continuous 30 mA VIN = 12V, VOUT2 = 2.5V, Switching Continuous 30 mA VIN = 26.5V, VOUT1 = 2.5V, Switching Continuous 40 mA VIN = 26.5V, VOUT2 = 2.5V, Switching Continuous 40 mA Shutdown, RUN = 0, VIN = 20V 40 µA IS(VIN) Input Supply Current VIN = 12V, VOUT = 2.5V, IOUT = 4A 0.97 A VIN = 26.5V, VOUT = 2.5V, IOUT = 4A 0.480 A INTVCC Internal VCC Voltage VIN = 12V, VRUN > 2V, No Load 4.8 5 5.2 V EXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive l 4.5 4.7 V
Output Specifications
IOUT1, 2(DC) Output Continuous Current Range VIN = 12V, VOUT = 2.5V (Note 5) 0 4 A ΔVOUT1(LINE) Line Regulation Accuracy VOUT = 2.5V, VIN from 6V to 26.5V 0.15 0.3 % V I l 0.25 0.5 % OUT(NOM) OUT = 0A For Each Output ΔVOUT2(LINE) Line Regulation Accuracy VOUT = 2.5V, VIN from 6V to 26.5V 0.15 0.3 % V I l 0.25 0.5 % OUT(NOM) OUT = 0A For Each Output ΔVOUT1(LOAD) Load Regulation Accuracy For Each Output, VOUT = 2.5V, 0A to 4A (Note 5) l 0.6 0.8 ±% V V OUT1(NOM) IN = 12V ΔVOUT2(LOAD) Load Regulation Accuracy For Each Output, VOUT = 2.5V, 0A to 4A (Note 5) l 0.6 0.8 ±% V V OUT2(NOM) IN = 12V VOUT1, 2(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF X5R Ceramic VIN = 12V, VOUT = 2.5V 20 mV VIN = 26.5V, VOUT = 2.5V 25 mV fS Output Ripple Voltage Frequency IOUT = 2A, VIN = 12V, VOUT = 2.5V 780 kHz FREQ/PLLFLTR = INTVCC ΔVOUTSTART Turn-On Overshoot COUT = 100µF X5R Ceramic, VOUT = 2.5V, IOUT = 0A VIN = 12V 10 mV VIN = 26.5V 10 mV tSTART Turn-On Time COUT = 100µF X5R Ceramic, VOUT = 2.5V, IOUT = 0A Resistive Load, VIN = 12V 0.250 ms VIN = 26.5V 0.130 ms ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load COUT = 100µF X5R Ceramic,VOUT = 2.5V, VIN = 12V 15 mV tSETTLE Settling Time for Dynamic Load Load: 0% to 50% to 0% of Full Load Step COUT = 100µF X5R Ceramic,VOUT = 2.5V, VIN = 12V 10 µs IOUTPK Output Current Limit COUT = 100µF X5R Ceramic, VIN = 6V, VOUT = 2.5V 12 A VIN = 26.5V, VOUT = 2.5V 11 A
Control Section
VFB1, VFB2 Voltage at VFB Pin IOUT = 0A, VOUT = 2.5V 0.792 0.8 0.808 V l 0.788 0.8 0.810 ITK/SS1, 2 Soft-Start Charge Current VTK/SS = 0V, VOUT = 2.5V 0.9 1.3 1.7 µA DFMAX Maximum Duty Factor In Dropout (Note 4) 97 % tON(MIN) Minimum On-Time (Note 4) 90 ns 4619fc For more information www.linear.com/LTM4619 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photograph Related Parts Design Resources