Datasheet LTM4618 (Analog Devices) - 3

LTM4618
elecTrical characTerisTics The
l
denotes the specifications which apply over the full internal operating temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, per typical application in Figure 21. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN(DC) Input DC Voltage (Note 5) l 4.5 26.5 V VOUT(DC) Output Voltage Total Variation with CIN = 10µF ×2, RFB = 28.0kΩ Line and Load COUT = 100µF ×3 X7R Ceramic MODE/PLLIN = 0V, VFREQ = 2.4V l 2.476 2.52 2.557 V VIN = 6V to 26.5V, IOUT = 0A to 6A (Note 4)
Input Specifications
VIN(UVLO) Undervoltage Lockout Thresholds VINTVCC Rising 2.00 2.20 2.35 V VINTVCC Falling 1.85 2.00 2.15 V IINRUSH(VIN) Input Inrush Current at Start-Up IOUT = 0A, CIN = 10µF ×2, COUT = 100µF ×3 VOUT = 2.5V VIN = 12V 0.3 A VIN = 26.5V 0.2 A IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 2.5V, IOUT = 0A 26 mA VIN = 26.5V, VOUT = 2.5V, IOUT = 0A 20 mA Shutdown, RUN = 0, VIN = 26.5V 80 µA IS(VIN) Input Supply Current VIN = 12V, VOUT = 2.5V, IOUT = 6A 1.430 A VIN = 26.5V, VOUT = 2.5V, IOUT = 6A 0.675 A INTVCC Internal VCC Voltage VIN = 12V, VRUN > 2V, No Load 4.8 5 5.2 V VEXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive l 4.5 4.7 V VLDO External EXTVCC Voltage Drop INTVCC = 20mA, VEXTVCC = 5V 50 100 mV VEXTVCC Hysteresis EXTVCC Hysteresis 200 mV
Output Specifications
IOUT(DC) Output Continuous Current Range VIN = 12V, VOUT = 2.5V (Note 4) 0 6 A ΔVOUT(LINE) Line Regulation Accuracy VOUT = 2.5V, VIN from 6V to 26.5V I 0.02 0.04 %/V VOUT OUT = 0A l ΔVOUT(LOAD) Load Regulation Accuracy VIN = 12V, VOUT = 2.5V, 0 to 6A (Note 4) l 0.3 0.6 % VOUT VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF ×3 X5R Ceramic VIN = 12V, VOUT = 2.5V 10 mV VIN = 26.5V, VOUT = 2.5V 12 mV fS Output Ripple Voltage Frequency IOUT = 2A, VIN = 12V, VOUT = 2.5V, VFREQ = INTVCC 780 kHz ΔVOUT(START) Turn-On Overshoot COUT = 100µF ×3 X5R Ceramic VOUT = 2.5V, IOUT = 0A VIN = 12V 20 mV VIN = 26.5V 20 mV tSTART Turn-On Time COUT = 100µF ×3 X5R Ceramic, VOUT = 2.5V, IOUT = 0A, TK/SS Capacitor = 0.01µF VIN = 12V 0.75 ms VIN = 26.5V 0.70 ms ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% of Full Load COUT = 100µF ×3 X5R Ceramic, VOUT = 2.5V VIN = 12V 15 mV tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% of Full Load COUT = 100µF ×3 X5R Ceramic, VOUT = 2.5V VIN = 12V 10 µs IOUT(PK) Output Current Limit COUT = 100µF ×3 X5R Ceramic VIN = 6V, VOUT = 2.5V 11 A VIN = 26.5V, VOUT = 2.5V 11 A 4618fb For more information www.linear.com/LTM4618 3 Document Outline Features Description Applications 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 Photograph Package Description Revision History Typical Application Related Parts