LTC3201

• Product Introduction

LTC3201

LED power output current adjustment for 100 mA ultra-low noise charge pump

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描述 The LTC®3201 is an ultralow noise, constant frequency, charge pump DC/DC converter specifically designed for powering white LEDs. The LTC®3201 is an ultra-low-noise, constant-frequency, charge-pumped DC/DC converter designed for white LED power. The part produces a low noise boosted supply capable of supplying 100mA of output current. LED current is regulated for accurate and stable backlighting. A 3-bit DAC provides output current adjust for brightness control. The 3-position DAC provides output current adjustment brightness control.

Low external parts count (one small flying capacitor and three small bypass capacitors) and small MSOP-10 package size make the LTC3201 ideally suited for space constrained applications. The low external component count (one small flyspan capacitor and three small bypass capacitors) and the size of the small MSOP-10 package make LTC3201 ideal for space-constrained applications. An input noise filter further reduces input noise,thus enabling direct connection to the battery. High switching frequency enables the use of small external capacitors.

The LTC3201 contains overtemperature protection and can survive an indefinite output short to GND. LTC3201 contains overheating protection and can survive an indefinite output short circuit to GND. Internal soft-start circuitry also prevents excessive inrush current on start-up. A low current shutdown feature disconnects the load from V IN and reduces quiescent current to less than 1μA.

• Input Noise Filter Minimizes Supply Noise Input Noise Filter reduces power supply noise
• Constant Frequency Operation
• 3-Bit LED Current Control 3-Bit LED current control
• No Inductors
• Low Shutdown Current: I IN 低关断电流：
• Output Current: 100mA Output Current: 100mA
• V IN Range: 2.7V to 4.5V V IN Range: 2.7V to 4.5V
• 1.8MHz Switching Frequency is 1.8MHz switching frequency
• Soft-Start Limits Inrush Current at Turn-On
• Short-Circuit and Overtemperature Protected
• The Available in 10-Pin MSOP Package is available in a 10-pin MSOP package
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