LTC3201

• Product introduction

LTC3201

100 mA ultra-low noise charge pumpLEDPower supply output current adjustment

peculiarity

descriptionThe LTC®3201 is an ultralow noise, constant frequency, charge pump DC/DC converter specifically designed for powering white LEDs.The LTC®3201 is an ultralow noise, constant frequency, charge-pumped DC/DC converter designed for powering white LEDs. The part produces a low noise boosted supply capable of supplying 100mA of output current.Part produces a low noise that increases the supply to deliver 100mA of output current. LED current is regulated for accurate and stable backlighting.Accurate and stable backlight LED current regulation. A 3-bit DAC provides output current adjust for brightness control.A 3-bit DAC provides output current regulation 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 span capacitor and three small bypass capacitors) and the small size of the 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.Input noisefilterto further reduce input noise and connect directly to the battery. High switching frequency enables the use of small external capacitors.The high switching frequency allows the use of small external capacitors.

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

• Input Noise Filter Minimizes Supply Noise Input noise filters reduce power supply noise
• Constant Frequency Operation Constant frequency operation
• 3-Bit LED Current Control 3-bit LED current control
• No Inductors No inductors
• Low Shutdown Current: I_IN Low shutdown current:
• Output Current: 100mAOutput current: 100mA
• V_INRange: 2.7V to 4.5VV_INRange: 2.7V to 4.5V
• 1.8MHz Switching Frequencyis a 1.8MHz switching frequency
• Soft-Start Limits Inrush Current at Turn-OnSoft-start limits surge on-current
• Short-Circuit and Overtemperature ProtectedShort circuit and overtemperature protection
• Available in 10-Pin MSOP PackageAvailable in a 10-pin MSOP package
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