MCP1651 Microchip Technology Inc., MCP1651 Datasheet

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... EXT 2 GND 2004 Microchip Technology Inc. MCP1650/51/52/53 Description The MCP1650/51/52/ 750 kHz gated oscillator boost controller packaged 10-pin MSOP package. Developed for high-power, portable applica- tions, the gated oscillator controller can deliver 5 watts of power to the load while consuming only 120 µA of quiescent current at no load ...

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... SHDN ON/OFF Control Voltage Feedback REF 1.22V DS21876A-page 2 MCP1650 + 1.22V V - HIGH ISNS Ref Osc. V Soft- LOW < 3.8V Start IN V > 3.8V HIGH ON/ IN OFF V DUTY OSC. OUT + - REF V LOW S Pulse Latch 0.122V - Current Limit GND EXT 2004 Microchip Technology Inc. ...

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... MCP1652 - Power Good Indication MCP1653 - Low Battery Detection and PG LBI Vin SHDN 2004 Microchip Technology Inc. MCP1650/51/52/53 MCP1653 - LBI and PG Features MCP1651 - Low Battery Detection V IN Low Battery Comparator 1.22 Vref + - MCP1650 Vref. (1.22V) MCP1652 - Power Good Indication V IN 85% of Vref ...

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... Voltage IN 3.3V ±10 off DS21876A-page 4 MCP1650/1/2/3 Timing Diagram SENSE MOSFET/Schottky Boost Combination Device 0.05 Inductor 3.3 µ EXT 12V OUT 100 mA OUT C 90.9 k OUT 10 µF Ceramic 10 k 2004 Microchip Technology Inc. ...

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... Hysteresis Low Duty Cycle DC High Duty Cycle DC 2004 Microchip Technology Inc. MCP1650/51/52/53 † Notice: Stresses above those listed under “Maximum Rat- ings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied ...

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... Shutdown Input Logic High Input V IN-HIGH Logic Low Input V IN-Low Input Leakage Current I SHDN Low Battery Detect (MCP1651/MCP1653 Only) Low Battery Threshold LBI Low Battery Threshold LBI Hysteresis Low Battery Input Leakage Current Low Battery Output Voltage V Low Battery Output Leakage ...

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... T = +125°C J 740 720 40°C J 700 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 Input Voltage (V) FIGURE 2-3: Oscillator Frequency vs. Input Voltage. 2004 Microchip Technology Inc. MCP1650/51/52/53 = 3.3V 12V µF (x5R or X7R Ceramic), C OUT IN = +25°C. 840 LOAD 820 800 780 760 740 720 5 5.5 6 -40 -25 -10 FIGURE 2-4: Ambient Temperature ...

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... Hysteresis vs. Input Voltage. 400 450 500 FIGURE 2-12 µF (X5R or X7R), OUT T = +125° +25° 40°C J 2.5 3 3.5 4 4.5 5 5.5 6 Input Voltage (V) Feedback Voltage vs. Input T = +125° +25° 40°C J 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 5.7 6 Input Voltage (V) Feedback Voltage Dynamic Load Response. 2004 Microchip Technology Inc. ...

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... mA 3.3 µH, SHDN > OUT IH A FIGURE 2-13: Dynamic Line Response. FIGURE 2-14: Power-Up Timing (Input Voltage). FIGURE 2-15: Power-Up Timing (Shutdown). 2004 Microchip Technology Inc. MCP1650/51/52/53 = 3.3V, VOUT = 12V µF (x5R or X7R Ceramic +25° 25° 100 mA OUT ...

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... X7R), OUT T = +125° +25° 40°C J 2.5 3 3.5 4 4.5 5 5.5 6 Input Votlage (V) LBI Hysteresis Voltage vs +125° +25° 40° LBO Sink Current (mA) LBO Output Voltage vs. LBO Output Timing. 2004 Microchip Technology Inc. ...

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... J 150 100 40° Output Sink Current (mA) FIGURE 2-26: PG Output Voltage vs. Sink Current. FIGURE 2-27: PG Timing. 2004 Microchip Technology Inc. MCP1650/51/52/53 = 3.3V, VOUT = 12V µF (x5R or X7R Ceramic +25°C. 116 T = 25°C A 114 112 110 108 106 104 6 2 FIGURE 2-28: vs ...

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... MCP1650/51/52/53 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE Pin No. Pin No. Pin No. Pin No. MCP1650 MCP1651 MCP1652 MCP1653 — 6 — — 7 — — — 3.1 External Gate Drive (EXT) EXT is the output pin that drives the external N-channel MOSFET on and off during boost operation ...

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... The input of the MCP1650/51/52/53 device is supplied by the output voltage during boost operation. This can be used to derive output voltages from input voltages that start up at approximately 2V (2-cell alkaline batteries). 2004 Microchip Technology Inc. MCP1650/51/52/53 4.3 Fixed Duty Cycle The MCP1650/51/52/53 family utilizes a unique two- ...

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... Speeding the transition up produces higher efficiency. DS21876A-page 14 4.11 Low Battery Detect The Low-Battery Detect (MCP1651 and MCP1653 only) feature can be used to determine when the LBI input voltage has fallen below a predetermined threshold. The low-battery detect continuously monitors the voltage on the LBI pin ...

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... Voltage IN 3.3V ±10 off FIGURE 5-1: Typical Non-Bootstrap Application Circuit (MCP1650/51/52/53). 2004 Microchip Technology Inc. MCP1650/51/52/53 5.1.1 NON-BOOTSTRAP BOOST APPLICATIONS Non-bootstrap applications are typically used when the output voltage is boosted to a voltage that is higher than the rated voltage of the MCP1650/51/52/53. For non-bootstrap applications, the input voltage is ...

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... LEDs. For many LEDs, the forward voltage drop is approximately 3.6V, which is between the maximum and minimum voltage range of a single-cell Li-Ion battery, as well as 3 alkaline or nickel metal batteries. 4.7 µF 3.3 µ N-Channel EXT MCP1651 1 MOSFET Power Good Output Schottky Diode ...

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... The feedback voltage is typically 1.22V. For this example BOT V = 12V OUT V = 1.22V 88.4 k TOP 90.9 K was selected as the closest standard value. 2004 Microchip Technology Inc. MCP1650/51/52/53 5.2.1.1 Where 12V X 100 mA OUT P = 1.2 Watts OUT Where 1.2W/80% IN (80 good efficiency estimate 1.5 Watts ...

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... Schottky diode is recommended for a 12V output appli- cation. Schottky diodes also have low forward-drop characteristics, another desired feature for switching power supply applications. maintaining N-channel MOSFET is + OUT - The MOSFET carries DSON = 2.5V 5.0V not always DSON typically results DSON 2004 Microchip Technology Inc. ...

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... ESR will largely determine the output ripple voltage. 5.2.5 LOW BATTERY DETECTION For low battery detection, the MCP1651 or MCP1653 device should be used. The low-battery detect feature compares the low battery input (LBI) pin to the internal 1.22V reference. If the LBI input is below the LBI ...

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... FB LBI 5 7 /LBO PGND /SHDN MCP1651_MSOP TP5 /SHDN1 AGND Keep Away From Switching Section The feedback resistor divider that sets the output voltage should be considered sensitive and be routed away from the power-switching components discussed previously. As shown in the diagram, R the MCP1650/51/52/53 should be returned to an analog ground plane ...

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... FB pin of the MCP1650/51/52/53. FIGURE 6-2: Top Layer Wiring. 2004 Microchip Technology Inc. MCP1650/51/52/53 Figure 6-3 represents the bottom wiring for the MCP1650/51/52/53 application shown. Silk-screen reference designator labels are transparent from the top of the board ...

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... MCP1650/51/52/53 7.0 PACKAGING INFORMATION 7.1 Package Marking Information 8-Lead MSOP (MCP1650, MCP1651, MCP1652) XXXXX YWWNNN 10-Lead MSOP (MCP1653) XXXXX YYWWNNN Legend: XX...X Customer specific information* YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 is week ‘01’) NNN Alphanumeric traceability code ...

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... Mold Draft Angle Top Mold Draft Angle Bottom *Controlling Parameter Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" (0.254mm) per side. JEDEC Equivalent: MO-187 Drawing No. C04-111 2004 Microchip Technology Inc. MCP1650/51/52/ φ A1 ...

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... E .193 BSC E1 .118 BSC D .118 BSC L .016 .024 .031 F .037 REF 0° - 8° c .003 - .009 B .006 .009 .012 5° - 15° 5° - 15° A2 MILLIMETERS* NOM MAX 10 0.50 TYP 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 0.15 0.23 0.30 5° - 15° 5° - 15° 2004 Microchip Technology Inc. ...

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... To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office PART NO Device UVLO Temperature Options Range Device MCP1650: 750 kHz Boost Controller MCP1651: 750 kHz Boost Controller MCP1652: 750 kHz Boost Controller MCP1653: 750 kHz Boost Controller UVLO Options 2.55V Temperature Range +125 C ...

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... MCP1650/51/52/53 NOTES: DS21876A-page 26 2004 Microchip Technology Inc. ...

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... Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. 2004 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC ...

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... Italy Via Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Biesbosch 14 NL-5152 SC Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 02/17/04 2004 Microchip Technology Inc. ...