Datasheet LTM4630A (Analog Devices) - 3

LTM4630A
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal operating temperature range. Specified as each individual output channel. TA = 25°C (Note 2), VIN = 12V and VRUN1, VRUN2 at 5V unless otherwise noted. Per the typical application in Figure 34. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input DC Voltage l 4.5 18 V VOUT Output Voltage l 0.6 8 V VOUT1(DC), Output Voltage, Total Variation with CIN = 22µF × 3, COUT = 100µF × 1 Ceramic, l 1.477 1.5 1.523 V VOUT2(DC) Line and Load 470µF POSCAP VIN = 12V, VOUT = 1.5V, IOUT = 0A to 18A (Note 8)
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, CSS = 0.01µF, 1 A COUT = 100µF ×3, VOUT1 = 1.5V, VOUT2 = 1.5V, VIN = 12V IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, Burst Mode Operation 3 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 35 µA IS(VIN) Input Supply Current VIN = 5V, VOUT = 1.5V, IOUT = 18A 6.5 A VIN = 12V, VOUT = 1.5V, IOUT = 18A 2.6 A
Output Specifications
IOUT1(DC), IOUT2(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 7) 0 18 A ΔVOUT1(LINE)/VOUT1 Line Regulation Accuracy VOUT = 1.5V, VIN from 4.5V to 18V l 0.01 0.025 %/V ΔVOUT2(LINE)/VOUT2 IOUT = 0A for Each Output, ΔVOUT1/VOUT1 Load Regulation Accuracy For Each Output, VOUT = 1.5V, 0A to 18A l 0.5 0.75 % ΔVOUT2/VOUT2 VIN = 12V (Note 7) VOUT1(AC), VOUT2(AC) Output Ripple Voltage For Each Output, IOUT = 0A, COUT = 100µF ×3/ 15 mVP-P X7R/Ceramic, 470µF POSCAP, VIN = 12V, VOUT = 1.5V, Frequency = 450kHz fS (Each Channel) Output Ripple Voltage Frequency VIN = 12V, VOUT = 1.5V, fSET = 1.25V (Note 4) 500 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 Load: 0% to 50% to 0% of Full Load, 20 µs (Each Channel) Step VIN = 12V, COUT = 100µF, 470µF POSCAP IOUT(PK) Output Current Limit VIN = 12V, VOUT = 1.5V 30 A (Each Channel)
Control Section
VFB1, VFB2 Voltage at VFB Pins IOUT = 0A, VOUT = 1.5V l 0.592 0.600 0.606 V IFB (Note 6) –5 –20 nA VOVL Feedback Overvoltage Lockout l 0.64 0.66 0.68 V 4630afb For more information www.linear.com/LTM4630A 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Related Parts