nx4108 Microsemi Corporation, nx4108 Datasheet
nx4108
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nx4108 Summary of contents
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... SYNCHRONOUS BUCK SWITCHER WITH FET ON BOARD DESCRIPTION The NX4108 is a current mode PWM buck switcher with internal compensation, can provide output cur- rent with FET on board. It operates from 2.8V to 5.5V and output as low as 0.6V which is ideal for the applica- tion with single cell Li-Ion battery as well as other 3.3V input bus supply applications ...
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... 150 150 FB VIN o C. Unless otherwise specified. SYM Test Condition V FB VIN=3V to 5V,VOUT=1.8V, IOUT=10mA EN=GND shutdown I No Load, switching Tss Microsemi Analog Mixed Signal Group NX4108 Min TYP MAX Units 0.6 V 0.59 0.607 2 mV 2.3 2.5 2 2.8 5 ...
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... Enable signal can not be high when VIN is low. Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 SYM Test Condition Vin=5V Vin=3.3V Vin=5V Vin=3.3V PIN DESCRIPTION Microsemi Analog Mixed Signal Group NX4108 Min TYP MAX Units 1 155 400 ...
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... BLOCK DIAGRAM EN POR VIN OCPB CLK start Hiccup Soft start timer Vref FB 1Mohm 20pF Figure 2 - Simplified block diagram of the NX4108 Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Thermal Shutdown UVLO POR 3 cycle counter reset dom 70ns S one shot ...
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... ° Fig.3 - Reference volateg vs temperature Normalized frequency vs temperature 100 temperature(°C) Fig.4 - Normalized frequency vs temperature Microsemi Analog Mixed Signal Group NX4108 120 140 160 5 ...
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... Figure 6 - Output ripple Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 22uF(X5R,6.3V VIN 2.2uH GND Figure 5 - Demo board schematic Figure 7 - Transient response Figure 8 - Efficiency Microsemi Analog Mixed Signal Group NX4108 VIN=5V Vout=2.5V 10uF (X5R,6.3V) 332k 105k 6 ...
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... Figure 10 - Output ripple Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 22uF(X5R,6.3V VIN 2.2uH 10uF (X5R,6.3V) 2 GND Figure 9 - Demo board schematic Figure 11 - Transient response Figure12 - Efficiency Microsemi Analog Mixed Signal Group NX4108 VIN=5V Vout=1.8V 332k 165k 7 ...
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... Figure 14 - Output ripple Figure 16 - Startup Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 22uF(X5R,6.3V VIN 2.2uH 10uF (X5R, 2 6.3V) GND Figure 13 - Demo board schematic Figure 15 - Transient response Figure 17 - Shutdown Microsemi Analog Mixed Signal Group NX4108 VIN=5V Vout=1.2V 332k 332k 8 ...
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... Typical Application( VOUT=1.2V) Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Figure 18 - Efficiency Microsemi Analog Mixed Signal Group NX4108 9 ...
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... VIN 1 4 VIN C1 22u 1 Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 VIN SW DO1608C-222 105k Figure 19 - Demoboard schematic Figure 20- Top layer Microsemi Analog Mixed Signal Group NX4108 VOUT 2 VOUT C2 10u R1 332k GND 10 ...
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... Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Figure 21- Gound layer Figure 22- Power layer Microsemi Analog Mixed Signal Group NX4108 11 ...
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... Rev. 1.7 12/30/09 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Figure 22- Bottom layer Microsemi Analog Mixed Signal Group NX4108 12 ...