Datasheet LTM4632 (Analog Devices) - 4

link to page 22 LTM4632
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications that apply over the specified internal operating temperature range (Note 2). Specified as each individual output channel at TA = 25°C (Note 2), VIN = 12V, unless otherwise noted, per the typical application in Figure 19 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Control Section
VFB1 Voltage at VFB1 Pin IOUT = 0A, VOUT1 = 1.3V l 0.593 0.600 0.607 V IFB1 Current at VFB1 Pin (Note 4) ±30 nA RFBHI1 Resistor Between VOUT1 and 60.00 60.40 60.80 kΩ VFB1 Pins VTTR VTTR Voltage Reference VDDQIN = 1.3V, l 0.492x 0.50x 0.508x V IVTTR = ±10mA, CVTTR < 10nF VDDQIN VDDQIN VDDQIN VRUN1, VRUN2 RUN Pin On Threshold RUN Threshold Rising 1.18 1.28 1.39 V RUN Threshold Falling 0.95 1.01 1.05 V IRUN1, IRUN2 RUN Pin Leakage Current 0 ±1 µA ITRACK/SS1 TRACK/SS1 Pin Soft-Start Pull-Up TRACK/SS1 = 0V 1.2 µA Current tON(MIN) Minimum On-Time (Note 4) 20 ns tOFF(MIN) Minimum Off-Time (Note 4) 45 ns VPGOOD PGOOD Trip Level VFB With Respect to 0.6V VOUT2 With Respect to VDDQIN/2 (Note 4) Ramping Negative –8 –14 % Ramping Positive 8 14 % RPGOOD PGOOD Pull-Down Resistance 1mA Load 15 Ω VINTVCC Internal VCC Voltage VIN = 3.6V to 15V 3.1 3.3 3.5 V VINTVCC Load Reg INTVCC Load Regulation ICC = 0 to 50mA 1.3 % fOSC Oscillator Frequency 1 MHz SYNC SYNC Threshold Voltage 0.95 V ISYNC/MODE MODE Input Current SYNC/MODE = INTVCC –1.5 µA
Note 1.
Stresses beyond those listed under Absolute Maximum Ratings
Note 3.
See output current derating curves for different VIN, VOUT and TA. may cause permanent damage to the device. Exposure to any Absolute
Note 4.
100% tested at wafer level. Maximum Rating condition for extended periods may affect device
Note 5.
This IC includes overtemperature protection that is intended reliability and lifetime. to protect the device during momentary overload conditions. Junction
Note 2.
The LTM4632 is tested under pulsed load conditions such that temperature will exceed 125°C when overtemperature protection is active. TJ ≈ TA. The LTM4632E is guaranteed to meet performance specifications Continuous operation above the specified maximum operating junction over the 0°C to 125°C internal operating temperature range. Specifications temperature may impair device reliability. over the –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4632I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. Rev. D 4 For more information www.analog.com Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Design Resources Related Parts