Datasheet LTM4628 (Analog Devices) - 3

LTM4628
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full internal operating temperature range (Note 2). Specified as each individual output channel. TA = 25°C, VIN = 12V and VRUN1, VRUN2 at 5V unless otherwise noted, per the typical application in Figure 28. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input DC Voltage l 4.5 26.5 V VOUT Output Voltage l 0.6 5.5 V VOUT1(DC), Output Voltage, Total Variation with CIN = 22µF × 3, COUT = 100µF × 1 VOUT2(DC) Line and Load Ceramic, 470µF POSCAP, MODE_PLLIN = GND, RFB1, RFB2 = 40.2k, VIN = 4.5V to 26.5V, l 1.477 1.5 1.523 V IOUT = 0A to 8A
Input Specifications
VRUN1, VRUN2 RUN Pin On/Off Threshold RUN Rising 1.1 1.25 1.40 V VRUN1HYS, VRUN2HYS RUN Pin On Hysteresis 150 mV IINRUSH(VIN) Input Inrush Current at Start-Up IOUT = 0A, CIN = 22µF × 3, 1 A COUT = 100µF , 470µF POSCAP VOUT1 = 1.5V, VOUT2 = 1.5V, VIN = 12V, TRACK = 0.01µF IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, Burst Mode Operation 5 mA VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode 15 mA VIN = 12V, VOUT= 1.5V, Switching Continuous 65 mA Shutdown, RUN = 0, VIN = 12V 60 µA IS(VIN) Input Supply Current VIN = 4.75V, VOUT = 1.5V, IOUT = 8A 2.9 A VIN = 12V, VOUT = 1.5V, IOUT = 8A 1.18 A VIN = 26.5V, VOUT = 1.5V, IOUT = 8A 0.575 A
Output Specifications
IOUT1(DC), IOUT2(DC) Output Continuous VIN = 12V, VOUT = 1.5V (Note 7) 0 8 A Current Range ΔVOUT1(LINE)/VOUT1 Line Regulation Accuracy VOUT = 1.5V, VIN from 4.5V to 26.5V l 0.010 0.04 %/V ΔVOUT2(LINE)/VOUT2 IOUT = 0A for Each Output, ΔVOUT1(LOAD)/VOUT1 Load Regulation Accuracy For Each Output, VOUT = 1.5V, 0A to 8A l 0.15 0.3 % ΔVOUT2(LOAD)/VOUT2 VIN = 12V (Note 7) VOUT1(AC), VOUT2(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF X5R Ceramic, 15 mVP-P 470µF POSCAP VIN = 12V, VOUT = 1.5V fS (Each Channel) Output Ripple Voltage Frequency VIN = 12V, VOUT = 1.5V, fSET = 2.5V (Note 4) 780 kHz fSYNC SYNC Capture Range 400 780 kHz (Each Channel) ΔVOUTSTART Turn-On Overshoot COUT = 100µF X5R Ceramic, 470µF POSCAP, 10 mV (Each Channel) VOUT = 1.5V, IOUT = 0A VIN = 12V tSTART Turn-On Time COUT = 100µF X5R Ceramic, 470µF POSCAP, 5 ms (Each Channel) No Load, TRACK/SS with 0.01µF to GND, VIN = 12V ΔVOUT(LS) Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load 30 mV (Each Channel) COUT = 22µF × 3 X5R Ceramic, 470µF POSCAP VIN = 12V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load, 20 µs (Each Channel) VIN = 12V, COUT = 100µF, COUT = 470µF IOUT(PK) Output Current Limit VIN = 12V, VOUT = 1.5V 15 A (Each Channel)
Control Section
VFB1, VFB2 Voltage at VFB Pins IOUT = 0A, VOUT = 1.5V l 0.592 0.600 0.606 V IFB1, IFB2 Leakage Current of VFB1, VFB2 (Note 6) –5 –20 nA VOVL Feedback Overvoltage Lockout l 0.64 0.66 0.68 V 4628fe For more information www.linear.com/LTM4628 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 Package Photos Revision History Typical Application Related Parts