Datasheet LTM4619 (Analog Devices) - 4

LTM4619
elecTrical characTerisTics The
l
denotes the specifications which apply over the full internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application in Figure 19. Specified as each channel. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
fNOM Nominal Frequency VFREQ = 1.2V 450 500 550 kHz fLOW Lowest Frequency VFREQ = 0V 210 250 290 kHz fHIGH Highest Frequency VFREQ ≥ 2.4V 700 780 860 kHz RMODE/PLLIN MODE/PLLIN Input Resistance 250 kΩ IFREQ Frequency Setting Sinking Current fMODE > fOSC –13 µA Sourcing Current fMODE < fOSC 13 µA VRUN1, 2 RUN Pin ON/OFF Threshold RUN Rising 1.1 1.22 1.35 V RUN Falling 1.02 1.14 1.27 V RFB1, RFB2 Resistor Between VOUT and VFB 60.1 60.4 60.7 kΩ Pins for Each Channel VPGL PGOOD Voltage Low IPGOOD = 2mA 0.1 0.3 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±2 µA ΔVPGOOD PGOOD Range VFB Ramping Negative –5 –7.5 –10 % VFB Ramping Positive 5 7.5 10 %
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings internal operating temperature range. Note that the maximum ambient may cause permanent damage to the device. Exposure to any Absolute temperature consistent with these specifications is determined by specific Maximum Rating condition for extended periods may affect device operating conditions in conjunction with board layout, the rated package reliability and lifetime. thermal resistance and other environmental factors.
Note 2:
The LTM4619E is guaranteed to meet performance specifications
Note 3:
The two outputs are tested separately and the same testing over the 0°C to 125°C internal operating temperature range. Specifications condition is applied to each output. over the full –40°C to 125°C internal operating temperature range are
Note 4:
100% tested at wafer level only. assured by design, characterization and correlation with statistical process
Note 5:
See Output Current Derating curves for different V controls. The LTM4619I is guaranteed to meet specifications over the full IN, VOUT and TA.
Typical perForMance characTerisTics (Refer to Figures 19 and 20) Efficiency vs Load Current with Efficiency vs Load Current with 5VIN (f = 500kHz for 0.8VOUT, 12VIN (f = 500kHz for 1.2VOUT and Efficiency vs Load Current with 1.2VOUT and 1.5VOUT) 1.5VOUT) 24VIN (f = 500kHz for 1.5VOUT)
95 95 95 3.3V 5V OUT OUT 5VOUT 90 2.5VOUT 90 90 3.3VOUT 3.3VOUT 2.5V 85 85 OUT 1.2V 85 OUT 80 1.5V 80 OUT 1.5V 80 1.2V 75 2.5V 0.8V OUT OUT 1.5V OUT OUT OUT 75 75 70 65 EFFICIENCY (%) 70 EFFICIENCY (%) 70 EFFICIENCY (%) 60 65 65 55 60 60 50 55 55 45 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4619 G01 4619 G02 4619 G03 4619fc 4 For more information www.linear.com/LTM4619 Document Outline Features Applications Description 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 Description Revision History Package Photograph Related Parts Design Resources