MIC2548A-1YM Micrel Inc, MIC2548A-1YM Datasheet
MIC2548A-1YM
Specifications of MIC2548A-1YM
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MIC2548A-1YM Summary of contents
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... The enable signal is compatible with both 3V and 5V logic, and is also used as the thermal shutdown latch reset for the MIC2548A The MIC2544A and MIC2548A are available in active-high and active-low enable versions in the 8-pin SOIC (small-outline integrated circuit) and 8-pin MSOP (micro- small-outline package) ...
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... Part Number Enable MIC2544A-1YM Active High MIC2544A-1YMM Active High MIC2544A-2YM Active Low MIC2544A-2YMM Active Low MIC2548A-1YM Active High MIC2548A-1YMM Active High MIC2548A-2YM Active Low MIC2548A-2YMM Active Low *Thermal Shutdown Latch April 2010 Latch* Temperature Range -40°C to +85°C -40°C to +85°C -40° ...
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... High input >1.7V typical; low input <1.5V typical. Do not float. MIC2548A only: Also resets thermal shutdown latch. Fault Flag (Output): Active-low, open-drain output. Indicates over current FLG or thermal shutdown conditions. MIC2548A only: latched low on thermal shutdown. GND Ground. Current Limit: Sets current-limit threshold using an external resistor, R ILIM connected to ground. 154Ω ...
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Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) ....................................... –0.3V to 6.0V IN Output Voltage (V ) ....................................... –0. OUT Output Current (I ) .................................Internally Limited OUT Enable Input (V ) ................................... –0. Fault ...
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... Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 4. Off is ≤0.8V and on is ≥2.4V for the MIC2544A-1 and MIC2548A-1. Off is ≥2.4V and on is ≤0.8V for the MIC2544A-2 and MIC2548A-2. The enable input has about 200mV of hysteresis. ...
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... Micrel, Inc. Test Circuit Timing Diagrams April 2010 Functional Characteristics Test Circuit Figure 1a. MIC2544A-1/MIC2548A-1 Figure 1b. MIC2544A-2/MIC2548A-2 6 MIC2544A/2548A M9999-043010 ...
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... Micrel, Inc. Timing Diagrams (Continued) Figure 2a. MIC2548A-2 Timing: Output is reset by toggling EN April 2010 Figure 2b. MIC2544A-2 Timing 7 MIC2544A/2548A M9999-043010 ...
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Micrel, Inc. Typical Characteristics Shutdown Current vs. Input Voltage 1.0 0.8 0.6 0.4 40°C 85°C 0.2 25°C 0.0 2.5 3 3.5 4 4.5 5 5.5 INPUT VOLTAGE (V) Current Limit vs. Input Voltage 2.0 -40°C 1.5 85°C 25°C 1.0 0.5 ...
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Micrel, Inc. Typical Characteristics (Continued) UVLO Threshold vs. Temperature 3.0 UTH 2.5 2.0 LTH 1.5 1.0 0.5 Hysteresis 0.0 -40 - TEMPERATURE (°C) R (Ω) SET vs. Output Current 2500 2000 1500 R = 230 SET ...
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Micrel, Inc. Functional Characteristics Note: The following applies unless otherwise noted: MIC2544A-1, T April 2010 = 25° 5.0V 232Ω 10µ SET OUT 10 MIC2544A/2548A M9999-043010 ...
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Micrel, Inc. Functional Characteristics (Continued) April 2010 11 MIC2544A/2548A M9999-043010 ...
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Micrel, Inc. Functional Characteristics (Continued) April 2010 12 MIC2544A/2548A M9999-043010 ...
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Micrel, Inc. Functional Characteristics (Continued) April 2010 13 MIC2544A/2548A M9999-043010 ...
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... Over-temperature detection functions only when the April 2010 switch is enabled. The MIC2548A features an internal latch which causes the part to remain off after thermal shutdown until a reset pulse is provided via the enable pin (pin 1). While in current-limit, the thermal shutdown latch prevents on/off cycling of the output ...
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Micrel, Inc. Setting I LIMIT The MIC2544A/2548A’s current programmable and controlled by a resistor connected between the I pin and ground. The value of this LIMIT resistor is determined by the following equation: CurrentLim itFactor(C LF LIMIT R ...
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... Micrel, Inc. Application Information Supply Filtering A minimum 1μF bypass capacitor from IN-to-GND, located near the MIC2544A and MIC2548A, is strongly recommended to control supply transients. Without a bypass capacitor, an output short may cause sufficient ringing on the input (from supply lead inductance) to damage internal control circuitry. An additional 22µF input capacitor placed close to the IC is required if a bulk input capacitor is further than 3 inches away from the IC ...
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Micrel, Inc. Figure 7. Flag Filter with C USB Power Distribution The MIC2544A is ideal for meeting USB power distribution requirements. Figure 8 depicts a USB Host application. RSET should be set to a value providing a current-limit >500mA. The ...
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Micrel, Inc. Note: MSOP package option uses pin 5 for ILIM. Pin 4 is not connected (NC). Bold lines indicate 0.1” wide, 1-oz. copper high-current traces. April 2010 Figure 8. USB Host Application Figure 9. Hot Plug Application 18 MIC2544A/2548A ...
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Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...