Datasheet LTM4668A (Analog Devices) - 3

LTM4668A
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified internal operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, per the typical application. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Section: (Per Channel)
VIN Input DC Voltage l 2.7 17 V VOUT(RANGE) Output Voltage Range VIN = 2.7V to 17V (Step-Down Only) l 0.6 5.5 V VOUT(DC) Output Voltage, Total Variation with CIN = 10µF, COUT = 47µF Ceramic l 3.25 3.30 3.35 V Line and Load RFB = 13.3k, MODE = INTVCC/2 VIN = 5V to 17V, IOUT = 0A to 1.2A VRUN RUN Pin On Threshold VRUN Rising 0.55 0.7 0.9 V IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 3.3V, MODE = INTVCC/2 (CCM) 75 mA VIN = 12V, VOUT = 3.3V, MODE = INTVCC (Burst) 0.5 mA VIN = 12V, VOUT = 3.3V, MODE = GND (PS) 200 µA Shutdown, RUN = 0, VIN = 12V 1 µA IS(VIN) Input Supply Current VIN = 12V, VOUT = 3.3V, IOUT = 1.2A 390 mA IOUT(DC) Output Continuous Current Range VIN = 12V, VOUT = 3.3V (Note 4) 0 1.2 A ΔVOUT (Line) Line Regulation Accuracy VOUT = 3.3V, VIN = 5V to 17V, IOUT = 0A l 0.01 0.1 %/V VOUT ΔVOUT (Load) Load Regulation Accuracy VOUT = 3.3V, IOUT = 0A to 1.2A l 0.1 0.75 % VOUT VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 47µF Ceramic 8 mV VIN = 12V, VOUT = 3.3V ΔVOUT(START) Turn-On Overshoot IOUT = 0A, COUT = 47µF Ceramic, 30 mV VIN = 12V, VOUT = 3.3V tSTART Turn-On Time COUT = 47µF Ceramic, VIN = 12V, VOUT = 3.3V, 0.8 ms No Load ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load 70 mV COUT = 47µF Ceramic, VIN = 12V, VOUT = 3.3V tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load 30 µs COUT = 47µF Ceramic, VIN = 12V, VOUT = 3.3V IOUTPK Output Current Limit VIN = 12V, VOUT = 3.3V 2 A VFB Voltage at VFB Pin IOUT = 0A, VOUT = 3.3V l 0.591 0.60 0.609 V IFB Current at VFB Pin (Note 3) ±10 nA RFBHI Resistor Between VOUT and VFB Pins 60.05 60.40 60.75 kΩ tON(MIN) Minimum On-Time (Note 5) 60 ns Rev. A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts