PDF《20VIN, Dual 4A or Single 8A》

3 C40°C to 125°C LTM4642IY#PBF SAC305 (RoHS) LTM4642Y e1 BGA

3 C40°C to 125°C LTM4642IY SnPb (63/37) LTM4642Y e0 BGA

3 C40°C to 125°C ? Consult Marketing for parts specified with wider operating temperature ranges. *Pad or ball finish code is per IPC/JEDEC J-STD-609. ? Terminal Finish Part Marking: www.linear.com/leadfree ? Recommended LGA and BGA PCB Assembly and Manufacturing Procedures: www.linear.com/umodule/pcbassembly ? LGA and BGA Package and Tray Drawings: www.linear.com/packaging http://www.linear.com/product/LTM4642#orderinfo

3 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 27. Specified as each channel. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ICPWR CPWR Bias Current CPWR = 12V, MODE = Continuous

20 mA IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT1 = 1.5V, Switching Continuous VIN = 12V, VOUT2 = 1.5V, Switching Continuous VIN = 20V, VOUT1 = 1.5V, Switching Continuous VIN = 20V, VOUT2 = 1.5V, Switching Continuous Shutdown, RUN = 0, VIN = 12V

25 25

22 22

10 mA mA mA mA ?A IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, IOUT = 4A VIN = 20V, VOUT = 1.5V, IOUT = 4A 0.6 0.356 A A DRVCC Internal VCC Voltage 6V <

VIN <

20V, No Load

5 5.3 5.6 V IDRVCC(REG) DRVCC Load Regulation IDRVCC =

0 to 100mA C1.5 C3 % EXTVCC(HYS) EXTVCC Switchover Hysteresis

200 mV EXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive 4.4 4.6 4.8 V Output Specifications IOUT1,2(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 5)

0 4 A ΔVOUT1(LINE) VOUT(NOM) Line Regulation Accuracy VOUT = 1.5V, VIN from 4.5V to 20V, IOUT = 0A For Each Output l 0.1 0.2 % ΔVOUT2(LOAD) VOUT2(NOM) Load Regulation Accuracy For Each Output, VOUT = 1.5V, 0A to 4A (Note 5) VIN = 12V l ±0.3 ±0.5 % VOUT1,2(AC) Output Ripple Voltage IOUT = 0A, COUT = 100?F X5R Ceramic VIN = 12V, VOUT = 1.5V VIN = 20V, VOUT = 1.5V

15 15 mV mV fS Output Ripple Voltage Frequency IOUT = 2A, VIN = 12V, VOUT = 1.5V, FREQ = 49.9k to Ground

800 kHz ΔVOUT(START) Turn-On Overshoot COUT = 100?F and 47?F X5R Ceramic, VOUT = 1.5V, IOUT = 0A VIN = 12V VIN = 20V

10 10 mV mV tSTART Turn-On Time COUT = 100?F X5R and 47?F Ceramic, VOUT = 1.5V, IOUT = 0A Resistive Load, TRACK/SS = 10nF VIN = 12V

6 ms ΔVOUT(LS) Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load COUT = 100?F and 47?F X5R Ceramic, VOUT = 1.5V, VIN = 12V

50 mV tSETTLE Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load COUT = 100?F an........