MCP1612EV Microchip Technology, MCP1612EV Datasheet
MCP1612EV
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... GBIC Modules • High-Speed Data System Bus Termination • Medical Instruments • Cellular/GSM/PHS Phones • +5V or +3.3V Distributed Voltages © 2005 Microchip Technology Inc. MCP1612 Description The MCP1612 is a 1A, 1.4 MHz, fully-integrated, current mode-controlled, synchronous buck regulator. The MCP1612 is packaged in the 8-pin MSOP and space-saving, 3x3 DFN packages ...
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... GND A GND DS21921B-page 2 UVLO + Peak Current Limit Disable V INSET REF IN Soft- Start Leading- Edge Blank V CC 1.2V Disable GND P-Channel SENSE PDRV L X Circuit NDRV Disable V REF Peak Current Limit P GND P GND UVLO SHDN Thermal Shutdown © 2005 Microchip Technology Inc. ...
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... Typical Application Circuit MCP1612 3.3V to 1.2V Synchronous Buck Converter 3.3 V ±10 µF Ceramic C BYP 0.1 µF Ceramic ON OFF 25 k 1000 pF © 2005 Microchip Technology Inc 3.3 µ MCP1612 GND GND SHDN Comp MCP1612 1. OUT C OUT 100 k 10 µF Ceramic 200 k DS21921B-page 3 ...
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... OUT Conditions V µA Shutdown mode (SHDN = GND LOAD I = 250 250 mA N µA SHDN = 0V 5. 2.7V to 5.5V 100 mA IN LOAD % V = 4.2V 100 LOAD and from cases where IN X GND must be overcome before the device will HYS © 2005 Microchip Technology Inc. ...
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... Electrical Specifications 3.0V to 5.5V Parameters Temperature Ranges Storage Temperature Range Maximum Junction Temperature Operating Junction Temperature Range Thermal Package Resistances Thermal Resistance, 8L-MSOP Thermal Resistance, 8L-DFN © 2005 Microchip Technology Inc 3.3V SHDN OUT range of -40°C to +85°C. A Min Typ ...
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... L = 3.3 µ 100 mA, LOAD V = 2.7V OUT V = 3.3V OUT 200 400 600 800 1000 Load Current (mA) Dropout Voltage 1.8V OUT 3 3.5 4 4.5 5 5.5 Input Voltage (V) Input Quiescent Current 3.5 4 4.5 5 5.5 Input Voltage (V) Oscillator Frequency vs. © 2005 Microchip Technology Inc. ...
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... FIGURE 2-8: Power-Up from Shutdown 100 mA to 800 mA OUT V OUT 200 mV/DIV I OUT 500 mA/DIV 50 µs/DIV FIGURE 2-9: Load Transient Response. © 2005 Microchip Technology Inc 3.3V SHDN OUT IN range of -40°C to +85° OUT 100 mV/DIV I OUT 500 mA/DIV = 1 ...
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... Waveform. DS21921B-page 3.3V µ 3.3 µ SHDN OUT IN range of -40°C to +85° 1. 5.0V/DIV V OUT 10 mV/DIV I IND 500 mA/DIV V = 3.3V IN FIGURE 2-14: Waveform. = 100 mA, LOAD 1.8V OUT OUT V = 3.3V IN 500 ns/DIV High Load Current Switching © 2005 Microchip Technology Inc. ...
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... P-channel and N-channel switches are turned off. 3.4 Compensation Pin (COMP) COMP is the internal transconductance amplifier output pin. External compensation is connected to COMP for control-loop stabilization. © 2005 Microchip Technology Inc. Function 3.5 Feedback Pin (FB) . For normal Connect the output voltage of the buck converter IN through an external resistor divider regulate the output voltage ...
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... When the SHDN pin is tied low, the MCP1612 is off. When tied high, the MCP1612 will be enabled and begin operation as long as the input voltage is not below the UVLO threshold. rises above the UVLO the input voltage is lower IN © 2005 Microchip Technology Inc. ...
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... Switching frequency = 1.4 MHz 5.2.1 SETTING OUTPUT VOLTAGE The output voltage of the MCP1612 is set by using an external resistor-divider network. The voltage present internally compared to a 0.8V reference voltage. A 200 k resistor is recommended for R lower-end of the voltage divider. Using higher-value © 2005 Microchip Technology Inc 3.3 µ ...
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... ESR, but increase in cost with higher values. Tantalum and electrolytic capacitors are relatively inexpensive in higher values, but they also have a much higher ESR. The amount of capacitance needed to obtain the desired ripple voltage is calculated by using the following relationship. EQUATION 5- ---------- - © 2005 Microchip Technology Inc. ...
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... V and V , along with a 0.1 µ capacitor to ground to help isolate the V switching noise. © 2005 Microchip Technology Inc. 5.2.6 COMPENSATION COMPONENTS An internal transconductance error amplifier is used to compensate the buck converter. An external resistor (R ) and capacitor (C C and GND, are all that is needed to provide a high- bandwidth loop ...
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... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. DS21921B-page 14 Example: 1612 I0532 256 Example: 1612I 532256 © 2005 Microchip Technology Inc. ...
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... Package may have one or more exposed tie bars at ends. BSC: Basic Dimension. Theoretically exact value shown without tolerances. See ASME Y14.5M REF: Reference Dimension, usually without tolerance, for information purposes only. See ASME Y14.5M JEDEC equivalent: M0-229 Drawing No. C04-062 © 2005 Microchip Technology Inc. b EXPOSED METAL PAD E (NOTE 2) ...
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... A2 MILLIMETERS* MIN NOM MAX 8 0.65 BSC - - 1.10 0.75 0.85 0.95 0.00 - 0.15 4.90 BSC 3.00 BSC 3.00 BSC 0.40 0.60 0.80 0.95 REF 0° - 8° 0.08 - 0.23 0.22 - 0.40 5° - 15° 5° - 15° Revised 07-21-05 © 2005 Microchip Technology Inc. ...
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... Removed device qualification note in Package Marking section. 3. Removed device qualification note in Package Outline drawing. 4. Removed device qualification note in Package Identification System section 5. Replaced MSOP and QFN package diagrams. Revision A (December 2004) • Original Release of this Document. © 2005 Microchip Technology Inc. MCP1612 DS21921B-page 17 ...
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... MCP1612 NOTES: DS21921B-page 18 © 2005 Microchip Technology Inc. ...
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... Synchronous Buck Regulator MCP1612T: Synchronous Buck Regulator (Tape and Reel) Temperature Range -40°C to +85°C Package Dual Flat, No Lead (3x3mm Body), 8-lead MS = Plastic MSOP, 8-lead © 2005 Microchip Technology Inc. MCP1612 . Examples: a) MCP1612-ADJI/MS: Industrial Temperature, 8LD MSOP package. b) MCP1612T-ADJI/MS: Tape and Reel Industrial Temperature, 8LD MSOP package ...
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... MCP1612 NOTES: DS21921B-page 20 © 2005 Microchip Technology Inc. ...
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... PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance and WiperLock are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2005 Microchip Technology Inc. EUROPE Austria - Weis Tel: 43-7242-2244-399 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...