MIC2040-1BMM Micrel Inc, MIC2040-1BMM Datasheet
MIC2040-1BMM
Specifications of MIC2040-1BMM
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MIC2040-1BMM Summary of contents
Page 1
... The output is reset by removing or reducing the load. Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com. Ordering Information Standard MIC2040-1BMM MIC2040-2BMM MIC2041-1BMM MIC2041-2BMM Typical Application +3.3V Power ...
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... CLF/R , where CLF is the current limit factor specified in SET the electrical characteristics table. For the MIC2040/41, the continuous output current range is 0.25A to 1.5A. Switch Input Supply: The drain of the output MOSFET. The range of input for the switch is 0.8V to 5.5V. These pins must be externally connected together ...
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... I (/FAULT) = 15mA FAULT V rising IN V falling IN rising IN V falling IN T increasing J T decreasing J > 4.0V for MIC2040/MIC2041 – CLF/R . LIM SET 3 (2) ........................................................... 1.6V to 5.5V ) ........................... –40°C to 85° θ(J-A) Min Typ 0.8 1.6 0.1 250 2.4 3.5 2.5 100 –1 ...
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... Specification for packaged product only. Timing Diagrams OUT OUT OUT 0 I OUT 0 /FAULT Figure 2. Overcurrent Fault Response — MIC2040-2 M9999-012004 (7) Condition 3V BIAS R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD LOAD R = 10Ω 1µF LOAD ...
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... MIC2040/2041 Test Circuit January 2005 C1 0 MIC2040/41-xBM C2 0 VBIAS R1 20k VIN 20k /FAULT 75k W 3 UVLOIN GND R4 68k 8,10 VOUT C V LOAD OUT 5 ILIM R SET Micrel M9999-012004 ...
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... MIC2040/2041 Typical Characteristics Supply Current vs. Temperature 500 450 400 5.5V 350 IN BIAS 300 BIAS 250 1.6V IN BIAS 200 150 100 -40 - 100 TEMPERATURE (°C) Output Leakage Current vs. Temperature 3000 2700 2400 2100 V = 5.5V BIAS 1800 1500 BIAS 1200 900 V = 1.6V BIAS 600 ...
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... MIC2040/2041 Typical Characteristics (continued) Turn On Delay vs. Temperature 800 750 700 5.5V IN BIAS 650 600 550 BIAS 500 1.6V IN BIAS 450 400 350 -40 - 100 TEMPERATURE (°C) January 2005 Output Rise Time vs. Temperature 800 750 700 5.5V IN BIAS 650 600 550 BIAS 1.6V ...
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... MIC2040/2041 Functional Diagram M9999-012004 + 8 Micrel + + January 2005 ...
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... MIC2040/2041 Functional Characteristics Turn-On Response TIME (1ms/div.) Latched Output - MIC2041 TIME (5ms/div.) Current-Limit Response TIME (5ms/div.) January 2005 =5V IN BIAS R = 5Ω LOAD C = 47µF LOAD BIAS R = 35Ω LOAD C = 57µF LOAD BIAS R = 3.5Ω LOAD C = 47µF LOAD 9 Turn-Off Response ...
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... MIC2040/2041 Thermal Shutdown Response TIME (100ms/div.) M9999-012004 10 Micrel January 2005 ...
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... The limiting current value is defined by the current limit factor (CLF) divided by R and the MIC2040/41 will limit from 0.25A to 1.5A with a set point accuracy of ±18%. In programming the nominal current limit, the value of R ...
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... MIC2040 automatically resets its output and resumes supply- ing current to the load when the die temperature drops to 120°C. If the fault is still present, the MIC2040 will quickly reheat and shut down again. This process of turning ON-OFF-ON is called thermal cycling and will continue as long as the power switch is enabled while the fault or excessive load is present ...
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... With the V and /FAULT outputs cycling on and off, the OUT MIC2040 will reset the /FAULT while in an overtemperature fault condition if the output voltage is allowed to swing below ground. The inductance present at the output must be neu- tralized by capacitance in order to ensure that the output does not fall below ground ...
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... Under maximum load, the power consumed by the devices may cause the devices to heat up considerably. The following list contains some useful sug- gestions for PCB layout design of the MIC2040/41 in order to prevent the die from overheating under normal operating conditions. ...
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... MIC2040/2041 Package Information I MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...