Datasheet LTM4668 (Analog Devices) - 3

LTM4668
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
IOUT(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 4) 0 1.2 A ΔVOUT (Line) Line Regulation Accuracy VOUT = 1.5V, VIN = 2.7V to 17V, IOUT = 0A l 0.01 0.1 %/V VOUT ΔVOUT (Load) Load Regulation Accuracy VOUT = 1.5V, IOUT = 0A to 1.2A l 0.1 0.75 % VOUT VOUT(AC) Output Ripple Voltage IOUT = 0A, COUT = 47µF Ceramic 7 mV VIN = 12V, VOUT = 1.5V ΔVOUT(START) Turn-On Overshoot IOUT = 0A, COUT = 47µF Ceramic, 30 mV VIN = 12V, VOUT = 1.5V tSTART Turn-On Time COUT = 47µF Ceramic, VIN = 12V, VOUT = 1.5V, 0.8 ms No Load ΔVOUTLS Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load 50 mV COUT = 47µF Ceramic, VIN = 12V, VOUT = 1.5V tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load 50 µs COUT = 47µF Ceramic, VIN = 12V, VOUT = 1.5V IOUTPK Output Current Limit VIN = 12V, VOUT = 1.5V 2 A VFB Voltage at VFB Pin IOUT = 0A, VOUT = 1.5V 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 VPGOOD PGOOD Trip Level VFB With Respect to Set Output VFB Ramping Negative –11 –8 % VFB Ramping Positive 8 11 % RPGOOD PGOOD Resistance 275 Ω VINTVCC Internal VCC Voltage VIN = 6V to 17V 4.7 5 5.3 V UVLO Undervoltage Lockout VIN Ramping Up 2.3 2.5 2.7 V UVLO(HYS) UVLO Hysteresis 250 mV fOSC Oscillator Frequency 1 MHz SYNC SYNC Capture Range 500 1500 kHz
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings controls. The LTM4668I is guaranteed to meet specifications over the may cause permanent damage to the device. Exposure to any Absolute full –40°C to 125°C internal operating temperature range. Note that the Maximum Rating condition for extended periods may affect device maximum ambient temperature consistent with these specifications is reliability and lifetime. determined by specific operating conditions in conjunction with board
Note 2:
The LTM4668 is tested under pulsed load conditions such that layout, the rated package thermal resistance and other environmental T factors. J ≈ TA. The LTM4668E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications
Note 3:
100% tested at wafer level over the full –40°C to 125°C internal operating temperature range are
Note 4:
See output current derating curves for different VIN, VOUT and TA. assured by design, characterization and correlation with statistical process
Note 5:
Guaranteed by design. Rev. A For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Design Resources Related Parts