MIC26603 MICREL [Micrel Semiconductor], MIC26603 Datasheet
MIC26603
Related parts for MIC26603
MIC26603 Summary of contents
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... The MIC26603 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include undervoltage lockout to ensure proper operation under power-sag conditions, thermal shutdown, internal soft-start to reduce the inrush current, foldback current limit and “ ...
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... Due to the high speed switching on this pin, the SW pin should be routed away from sensitive nodes. Power Ground. PGND is the ground path for the MIC26603 buck converter power stage. The PGND pins connect to the low-side N-Channel internal MOSFET gate drive supply ground, the sources of ...
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... Internal Linear Regulator (Output): VDD supply is the supply bus for the IC control circuit. V created by internal LDO from V 28 VDD ceramic capacitor from the VDD pin to SGND pins July 2011 > 92% of nominal. OUT < +5.5V, VDD should be tied to PVIN pins. A 1.0µF . When must be place next to the IC. 3 MIC26603 is DD M9999-071311-A ...
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... T ≤ 125°C (±1.5 (Continuous Mode) OUT V = 4.5V to 28V 0. 12V 1. MIC26603 ( )................................. 4.5V to 28V )......... 4. .................................................. ........................ −40°C to +125°C J (4) ® -24L (θ ) .............................28°C/W JA ≤ +125°C. J Min. ...
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... Low to High FB < 0.9 × V Sweep 1mA FB NOM PG T Rising J depends upon the printed circuit layout square inch 4 layer, 0.62”, FR-4 PCB with 2oz finish copper weight of typically 300ns. OFF 5 MIC26603 ≤ +125°C. J Min. Typ. Max. Units ...
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... INPUT VOLTAGE (V) Current Limit vs. Input Voltage INPUT VOLTAGE (V) PG Threshold/V vs. Input Voltage 100 95% 90% 85% 80% 4.0 10 INPUT VOLTAGE (V) MIC26603 10mA 1.8V OUT Ratio REF V = 0.7V REF 16.0 22.0 28.0 M9999-071311-A ...
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... Line Regulation vs. Temperature 0.2% 0.1% 0.0% -0.1% -0.2% -50 - 100 125 TEMPERATURE (°C) Current Limit vs. Temperature 12V 1.8V OUT 5 0 -50 - 100 125 TEMPERATURE (°C) MIC26603 50 75 100 125 V = 4.5V to 28V 1.8V OUT OUT 100 125 50 75 100 125 M9999-071311-A ...
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... V = 12V IN 3 1.8V OUT OUTPUT CURRENT (A) Die Temperature* (V vs. Output Current 0. OUTPUT CURRENT (A) MIC26603 V = 12V 1.8V OUT 5V 25ºC 85ºC 125º 5V 1.8V OUT ...
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... OUTPUT CURRENT (A) Thermal Derating* vs. Ambient Temperature 12V 0.8, 1.2, 1.8V OUT 2 0 -50 - 100 125 AMBIENT TEMPERATURE (°C) MIC26603 = 12V 12V 1.8V OUT 24V 24V 1.8V OUT 0.8V 1. 100 125 ...
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... AMBIENT TEMPERATURE (°C) Die Temperature* : The temperature measurement was taken at the hottest point on the MIC26603 case mounted square inch 4 layer, 0.62”, FR-4 PCB with 2oz finish copper weight per layer; see Thermal Measurement section. Actual results will depend upon the size of the PCB, ambient temperature and proximity to other heat emitting components ...
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... Micrel, Inc. Functional Characteristics July 2011 11 MIC26603 M9999-071311-A ...
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... Micrel, Inc. Functional Characteristics (Continued) July 2011 12 MIC26603 M9999-071311-A ...
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... Micrel, Inc. Functional Characteristics (Continued) July 2011 13 MIC26603 M9999-071311-A ...
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... Micrel, Inc. Functional Diagram July 2011 Figure 1. MIC26603 Block Diagram 14 MIC26603 M9999-071311-A ...
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... MOSFET. July 2011 The maximum duty cycle is obtained from the 300ns t OFF(min) where not recommended to use MIC26603 with a OFF-time close OUT and reduce the line regulation performance. Therefore, the maximum output voltage of the MIC26603 should be limited to 5.5V and the maximum external ripple injection should be limited to 200mV.Please refer to “ ...
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... Micrel, Inc. Figure 2. MIC26603 Control Loop Timing Figure 3 shows the operation of the MIC26603 during a load transient. The output voltage drops due to the sudden load increase, which causes the V than V . This will cause the error comparator to trigger REF an ON-time period. At the end of the ON-time period, a ...
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... In each switching cycle of the MIC26603 converter, the inductor current is sensed by monitoring the low-side MOSFET in the OFF period. If the inductor current is greater than 13A, then the MIC26603 turns off the high- side MOSFET and a soft-start sequence is triggered. This mode of operation is called “hiccup mode” and its purpose is to protect the downstream load in case of a hard short ...
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... DD DIODE DIODE D1. An approximate 30ns delay between the high-side and low-side driver transitions is used to prevent current from simultaneously flowing unimpeded through both MOSFETs. July 2011 . Diode recharged through , can BST supply voltage. DD and the DD 18 MIC26603 M9999-071311-A ...
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... July 2011 Maximizing efficiency requires the proper selection of core material and minimizing the winding resistance. The high-frequency operation of the MIC26603 requires the use of ferrite materials for all but the most cost sensitive applications. Lower cost iron powder cores may be used but the increase in core loss will reduce the efficiency of the power supply ...
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... If the feedback voltage ripple is so small that the g Eq. 11 then the MIC26603 will lose control and the output voltage is not regulated. In order to have some amount of V output voltage ripple applications. ...
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... T = << × τ τ 1nF to 100nF can easily satisfy the large ff is used in order to be considered as short inj to feed all output ripples into the ff MIC26603 and a inj 1 D) × Eq × τ SW Eq 1nF to ff M9999-071311-A ...
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... R (R1//R2) ( inj K div Step 3. Select C as 100nF, which could be considered inj as short for a wide range of the frequencies. Setting Output Voltage The MIC26603 requires two resistors to set the output voltage as shown in Figure 7. The output voltage is determined by the equation × OUT FB R2 where ...
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... A ground plane is required to control EMI and minimize the inductance in power, signal and return paths. The following guidelines should be followed to insure proper operation of the MIC26603 regulator. IC • A 2.2µF ceramic capacitor, which is connected to the PVDD pin, must be located right at the IC. The PVDD pin is very noise sensitive and placement of the capacitor is very critical ...
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... Micrel, Inc. Evaluation Board Schematic July 2011 Figure 9. Schematic of MIC26603 Evaluation Board (J11, R13, R15 are for testing purposes) 24 MIC26603 M9999-071311-A ...
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... Resistor, Size 0603, 1% (7) Vishay Dale 2.00kΩ Resistor, Size 0603, 1% (7) Vishay Dale 1.18kΩ Resistor, Size 0603, 1% (7) Vishay Dale 806Ω Resistor, Size 0603, 1% (7) Vishay Dale 475Ω Resistor, Size 0603 MIC26603 Qty ...
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... Micrel, Inc.: www.micrel.com. July 2011 Manufacturer Description (7) Vishay Dale 0Ω Resistor, Size 0603, 5% (7) Vishay Dale 49.9Ω Resistor, Size 0603, 1% (7) Vishay Dale 1.21Ω Resistor, Size 0603, 1% 28V, 6A Hyper Light Load (9) Micrel. Inc. DC/DC Buck Regulator 26 MIC26603 Qty ™ Synchronous 1 M9999-071311-A ...
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... Micrel, Inc. PCB Layout Recommendations Figure 11. MIC26603 Evaluation Board Mid-Layer 1 (Ground Plane) July 2011 Figure 10. MIC26603 Evaluation Board Top Layer 27 MIC26603 M9999-071311-A ...
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... Micrel, Inc. PCB Layout Recommendations (Continued) July 2011 Figure 12. MIC26603 Evaluation Board Mid-Layer 2 Figure 13. MIC26603 Evaluation Board Bottom Layer 28 MIC26603 M9999-071311-A ...
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... Micrel, Inc. Recommended Land and Solder Stencil Pattern July 2011 29 MIC26603 M9999-071311-A ...
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... Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully July 2011 28-Pin 5mm x 6mm MLF indemnify Micrel for any damages resulting from such use or sale. © 2011 Micrel, Incorporated. 30 ® (YJL) http://www.micrel.com MIC26603 nt M9999-071311-A ...