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RT9261 Datasheet(PDF) 5 Page - Richtek Technology Corporation |
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RT9261 Datasheet(HTML) 5 Page - Richtek Technology Corporation |
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5 / 12 page  RT9261/A Preliminary 5 DS9261/A-12 March 2007 www.richtek.com Electrical Characteristics (Refer to Figure 1) Parameter Symbol Test Conditions Min Typ Max Units Output Voltage Accuracy ΔVOUT -2 -- +2 % Input Voltage VIN -- -- 7 V Start-up Voltage VST IOUT = 1mA, VIN: 0 → 2V -- 0.85 1.0 V Hold-on Voltage VHO IOUT = 1mA, VIN: 2 → 0V 0.7 -- -- V VOUT ≤ 3.5V (1) -- 15 18 Input Current 1 3.5V < VOUT ≤ 5V (2) To be measured at VIN at no load -- 18 24 μA Input Current 2 To be measured at VOUT in switch off condition -- 5 8 μA VOUT ≤ 3.5V (1) 60 -- -- LX Switching Current 3.5V < VOUT ≤ 5V (2) ISWITCHING VLX = 0.4V 80 -- -- mA LX Leakage Current ILEAKAGE VLX = 6V -- -- 0.5 μA Maximum Oscillator FMAX 80 120 160 kHz Oscillator Duty Cycle DOSC On ( VLX ” L ” ) side 65 75 85 % Efficiency -- 75 -- % VLX Voltage Limit LX switch on 0.65 0.8 1.0 V Notes: (1)Unless otherwise provided, VIN = 1.8V, VSS = 0V, IOUT = 10mA, TOPT = 25°C, and External Circuit of Typical Application (2)Unless otherwise provided, VIN = 3V, VSS = 0V, IOUT = 10mA, TOPT = 25° C, and External Circuit of Typical Application Absolute Maximum Ratings Output Voltage -------------------------------------------------------------------------------------------------------- 8V LX Pin Voltage (1) ------------------------------------------------------------------------------------ 8V EXT Pin Voltage (2) --------------------------------------------------------------------------------------------------- − 0.3 to VOUT +0.3V EN Pin Voltage (3) ---------------------------------------------------------------------------------------------------- − 0.3 to VOUT +0.3V LX Pin Output Current (1) -------------------------------------------------------------------------------------------- 250mA EXT Pin Current (2) --------------------------------------------------------------------------------------------------- ± 50mA Power Dissipation, PD @ TA = 25°C SOT-89 ------------------------------------------------------------------------------------------------------------------ 0.5W SOT-23-5 --------------------------------------------------------------------------------------------------------------- 0.25W Package Thermal Resistance SOT-89, θJC ------------------------------------------------------------------------------------------------------------ 100°C/W SOT-89, θJA ------------------------------------------------------------------------------------------------------------ 300°C/W SOT-23-5, θJA ---------------------------------------------------------------------------------------------------------- 250°C/W Operating Temperature Range ------------------------------------------------------------------------------------- − 20 to +85°C Storage Temperature Range --------------------------------------------------------------------------------------- 165°C Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------- 260°C Notes: (1) Applicable to RT9261- CX and RT9261- CB (2) Applicable to RT9261A- CX and RT9261A- CB (3) Applicable to RT9261- CB and RT9261A- CB |
Similar Part No. - RT9261_07 |
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Similar Description - RT9261_07 |
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