Datasheet LTM4650 (Analog Devices) - 3

link to page 27 LTM4650
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 22. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input DC Voltage l 4.5 15 V VOUT Output DC Voltage l 0.6 1.8 V VOUT1(DC), Output Voltage, Total Variation with CIN = 22µF × 3, COUT = 100µF × 2 Ceramic, l 1.182 1.2 1.218 V VOUT2(DC) Line and Load (Note 7) 470µF POSCAP VOUT = 1.2V, IOUT = 0A to 25A
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 IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.2V, Burst Mode Operation 4.5 mA VIN = 12V, VOUT = 1.2V, Pulse-Skipping Mode 25 mA VIN = 12V, VOUT= 1.2V, Switching Continuous 240 mA Shutdown, RUN = 0, VIN = 12V 35 µA IS(VIN) Input Supply Current VIN = 4.5V, VOUT = 1.2V, IOUT = 25A 8.4 A VIN = 12V, VOUT = 1.2V, IOUT = 25A 3.2 A
Output Specifications
IOUT1(DC), IOUT2(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.2V (Note 6) 0 25 A ΔVOUT1(LINE)/VOUT1 Line Regulation Accuracy VOUT = 1.2V, VIN from 4.5V to 15V l 0.01 0.1 %/V ΔVOUT2(LINE)/VOUT2 IOUT = 0A for Each Output, ΔVOUT1/VOUT1 Load Regulation Accuracy For Each Output, VOUT = 1.2V, 0A to 25A l 0.5 0.75 % ΔVOUT2/VOUT2 VIN = 12V (Note 6) VOUT1(AC), VOUT2(AC) Output Ripple Voltage For Each Output, IOUT = 0A, COUT = 100µF × 3 15 mVP-P Ceramic, 470µF POSCAP, VIN = 12V, VOUT = 1.2V, Frequency = 500kHz fS (Each Channel) Output Ripple Voltage Frequency VIN = 12V, VOUT = 1.2V, fSET = 1.25V (Note 4) 500 kHz fSYNC SYNC Capture Range 400 780 kHz (Each Channel) ΔVOUTSTART Turn-On Overshoot COUT = 100µF Ceramic, 470µF POSCAP, VOUT = 10 mV (Each Channel) 1.2V, IOUT = 0A VIN = 12V tSTART Turn-On Time COUT = 100µF 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 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 = 1.2V 35 A (Each Channel) Rev. C For more information www.analog.com 3 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts