MCP1663 High-Voltage Integrated Switch PWM Boost Regulator with UVLO Features General Description 36V, 400 m Integrated Switch The MCP1663 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC Up to 92% Efficiency converter which integrates a 36V, 400m NMOS Output Voltage Range: up to 32V switch. It provides a space-efficient high-voltage 1.8A Peak Input Current Limit: step-up power supply solution for applications powered -I > 375 mA 5.0V V , 12V V OUT IN OUT by either two-cell or three-cell alkaline, Ultimate -I > 200 mA 3.3V V , 12V V Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer OUT IN OUT batteries. -I > 150 mA 4.2V V , 24V V OUT IN OUT Input Voltage Range: 2.4V to 5.5V The integrated switch is protected by the 1.8A cycle-by-cycle inductor peak current limit operation. Undervoltage Lockout (UVLO): There is an output overvoltage protection which turns -UVLO V Rising: 2.3V, typical IN off switching in case the feedback resistors are -UVLO V Falling: 1.85V, typical IN accidentally disconnected or the feedback pin is No Load Input Current: 250 A, typical short-circuited to GND. Sleep mode with 0.3 A Typical Shutdown Low-voltage technology allows the regulator to start-up Quiescent Current without high inrush current or output voltage overshoot PWM Operation with Skip Mode: 500 kHz from a low-voltage input. The device features a UVLO Feedback Voltage Reference: V = 1.227V FB which avoids start-up and operation with low inputs or Cycle-by-Cycle Current Limiting discharged batteries for two cell-powered applications. Internal Compensation For standby applications (EN = GND), the device stops Inrush Current Limiting and Internal Soft Start switching, enters sleep mode and consumes 0.3 A (typical) of input current. Output Overvoltage Protection (OVP) in the event of: MCP1663 is easy to use and allows creating classic - Feedback pin shorted to GND boost, SEPIC or flyback DC-DC converters within a small Printed Circuit Board (PCB) area. All - Disconnected feedback divider compensation and protection circuitry is integrated to Overtemperature Protection minimize the number of external components. Ceramic Easily Configurable for SEPIC, Cuk or Flyback input and output capacitors are used. Topologies Available Packages: Package Types - 5-Lead SOT-23 MCP1663 - 8-Lead 2x3 TDFN SOT-23 Applications SW 1 5 V IN Two and Three-Cell Alkaline, Lithium Ultimate and GND 2 NiMH/NiCd Portable Products V 3 4 EN Single-Cell Li-Ion to 5V, 12V or 24V Converters FB LCD Bias Supply for Portable Applications MCP1663 Camera Phone Flash 2x3 TDFN* Portable Medical Equipment V 1 8 EN Hand-Held Instruments FB S P 2 7 EP GND GND 9 SW 3 6 NC NC 4 5 V IN * Includes Exposed Thermal Pad (EP) see Table 3-1. 2015 Microchip Technology Inc. DS20005406A-page 1MCP1663 Typical Applications D V L OUT PMEG2010 12V, 250 mA 4.7 H C IN SW 4.7 - 10 F V IN R V 3.6V to 4.5V TOP IN 1.05 M C MCP1663 OUT + 4.7 - 10 F V FB R 1 X LI-ION BOT OR 120 k 3 X ALKALINE EN GND - ON OFF D V L OUT MBRM140 24V, 100 mA 10 H C IN SW 10 F V IN V R 3.6V to 4.5V IN TOP 1.05 M C MCP1663 OUT + 10 - 22 F V FB 1 X LI-ION R BOT OR 56 k 3 X ALKALINE EN GND - ON OFF 450 400 V = 12V OUT 350 300 250 V = 24V OUT 200 150 100 50 0 2.4 2.7 3 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4 V (V) IN Maximum Output Current vs. Input Voltage DS20005406A-page 2 2015 Microchip Technology Inc. I (mA) BATTERY OUT BATTERY