MCP1664 Series

High Voltage Output Boost LED Constant Current Regulator

Catalog

High Voltage Output Boost LED Constant Current Regulator

Part	Topology	Supplier Device Package	Applications	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Internal Switch(s)	Voltage - Output	Current - Output / Channel [custom]	Voltage - Supply (Max)	Dimming	Type	Voltage - Supply (Min) [Min]	Frequency	Package / Case	Number of Outputs	Qualification	Grade
Microchip Technology MCP1664T-E/OT	Step-Up (Boost)	SOT-23-5	Backlight Camera Flash	Surface Mount	-40 °C	125 °C		32 VDC	300 mA	5.5 V	PWM	DC DC Regulator	2.4 V	500 kHz	SC-74A SOT-753	1
Microchip Technology MCP1664T-E/MNYVAO	Step-Up (Boost)	8-TDFN (2x3)	Backlight Camera Flash	Surface Mount	-40 °C	125 °C		32 VDC	300 mA	5.5 V	PWM	DC DC Regulator	2.4 V	500 kHz	8-WFDFN Exposed Pad	1	AEC-Q100	Automotive

Catalog

High Voltage Output Boost LED Constant Current Regulator

Key Features

• * Up to 92% Efficiency

• * High Output Voltage Range: up to 32V

• * ILEDup to 300 mA @ 5.0V VIN, 4 White LEDs

• * ILED up to 200 mA @ 3.3V VIN, 4 White LEDs

• * ILED up to 150 mA @ 4.2V VIN, 8 White LEDs

• * Input Voltage Range: 2.4V to 5.5V

• * UVLO@VIN Rising: 2.3V, typical

• * UVLO@VIN Falling: 1.85, typical

• * No Load Input Current: 250 µA, typical

• * Sleep mode with 200 nA Typical Quiescent Current

• * PWM Operation with Skip mode: 500 kHz

• * Feedback Voltage Reference: VFB= 300 mV

• * Cycle-by-Cycle Current Limiting

• * Internal Compensation

• * Inrush Current Limiting and Internal Soft-Start

• * Feedback Pin Shorted to GND (Prevent Excessive Current into LEDs)

• * Disconnected LED String (Prevent Overvoltage to the Converter’s Output and SW Pin)

• * Overtemperature Protection

• * Available Packages: 5-Lead SOT-23 or 2x3 8-Lead TDFN

Description

The MCP1664 device is a compact, space-efficient, fixed-frequency, non-synchronous step-up converter optimized to drive LED strings with constant current from two and three-cell alkaline and NiMH/NiCd or one-cell Li-Ion or Li-Polymer batteries. The device integrates a 36V, 400 mΩ low-side switch, which is protected by the 1.8A cycle-by-cycle inductor peak current limit operation. Low-voltage technology allows the MCP1664 to start-up without high inrush current or output overshoot. All compensation and protection circuitry is integrated to minimize the number of external components.