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LTM4623 Datasheet(PDF) 4 Page - Linear Technology |
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LTM4623 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 28 page  LTM4632 4 4632fc For more information www.linear.com/LTM4632 Note 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2. The LTM4632 is tested under pulsed load conditions such that TJ ≈ TA. The LTM4632E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications 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. 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 VFB1 Pins 60.00 60.40 60.80 kΩ VTTR VTTR Voltage Reference VDDQIN = 1.3V, IVTTR = ±10mA, CVTTR < 10nF l 0.492x VDDQIN 0.50x VDDQIN 0.508x VDDQIN V VRUN1, VRUN2 RUN Pin On Threshold RUN Threshold Rising RUN Threshold Falling 1.18 0.95 1.28 1.01 1.39 1.05 V V IRUN1, IRUN2 RUN Pin Leakage Current 0 ±1 µA ITRACK/SS1 TRACK/SS1 Pin Soft-Start Pull-Up Current TRACK/SS1 = 0V 1.2 µA 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 Ramping Positive –8 8 –14 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 3. See output current derating curves for different VIN, VOUT and TA. Note 4. 100% tested at wafer level. Note 5. This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction temperature will exceed 125°C when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability. |
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