Datasheet LTM4631 (Analog Devices) - 4

LTM4631
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 23. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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 13 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 5) –5 –20 nA VOVL Feedback Overvoltage Lockout l 0.64 0.66 0.68 V TRACK1 (I), Track Pin Soft-Start Pull-Up Current TRACK1 (I),TRACK2 (I) Start at 0V 1 1.3 1.5 µA TRACK2 (I) UVLO Undervoltage Lockout (Falling) 3.3 V UVLO Hysteresis 0.6 V tON(MIN) Minimum On-Time (Note 5) 90 ns RFBHI1, RFBHI2 Resistor Between VOUTS1, VOUTS2 60.05 60.4 60.75 kΩ and VFB1, VFB2 Pins for Each Output VPGOOD1, VPGOOD2 PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V Low IPGOOD PGOOD Leakage Current VPGOOD = 5V ±5 µA VPGOOD PGOOD Trip Level VFB with Respect to Set Output Voltage VFB Ramping Negative –10 % VFB Ramping Positive 10 %
INTVCC Linear Regulator
VINTVCC Internal VCC Voltage 6V < VIN < 15V 4.8 5 5.2 V VINTVCC INTVCC Load Regulation ICC = 0mA to 50mA 0.5 2 % Load Regulation VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive 4.5 4.7 V VEXTVCC(DROP) EXTVCC Dropout ICC = 20mA, VEXTVCC = 5V 50 100 mV VEXTVCC(HYST) EXTVCC Hysteresis 220 mV
Oscillator and Phase-Locked Loop
Oscillator Frequency Medium Frequency fSET = 1.2V 450 500 550 kHz Lowest Frequency fSET = 0V (Note 4) 210 250 290 kHz Highest Frequency fSET > 2.4V, Up to INTVCC 700 780 860 kHz fSET Frequency Set Current 9 10 11 µA RMODE_PLLIN MODE_PLLIN Input Resistance 250 kΩ CLKOUT Phase (Relative to VOUT1) PHASMD = GND 60 Deg PHASMD = Float 90 Deg PHASMD = INTVCC 120 Deg CLK High Clock High Output Voltage 2 V CLK Low Clock Low Output Voltage 0.8 V 4631fb 4 For more information www.linear.com/LTM4631 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Package Description Related Parts Features Applications Typical Application Description 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 PHoto Design Resources Related Parts