RT9261 RICHTEK [Richtek Technology Corporation], RT9261 Datasheet
RT9261
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RT9261 Summary of contents
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... A low ripple and high efficiency step-up DC/DC converter can be constructed of this RT9261 IC with only three external components. The RT9261A IC provides with a drive pin (EXT) for an external transistor, so that a power transistor can be externally applied. Therefore, the RT9261A IC is recommended for applications where large currents are required. CE pin enables circuit to set the standby supply current at a maximum of 0.5µ ...
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... SOT-89, θ JA SOT-25, θ JA Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Notes: (1) Applicable to RT9261- CX and RT9261- (2) Applicable to RT9261A- (3) Applicable to RT9261- CB and RT9261A- Electrical Characteristics Parameter Output Voltage Accuracy Input Voltage Start-up Voltage Hold-on Voltage V ≤ 3.5V OUT Input Current 1 3.5V < ...
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... OUT ( 0.4V EXT (2) ≤ 5V OUT F MAX D V ” H ” side OSC EXT = 1.8V, VSS = 0V 10mA OUT = 3V, VSS = 0V 10mA OUT RT9261/A Min - 0. → OUT -- -1.5 – 0.4V OUT -2 1 25°C, and use External Circuit of OPT = 25° ...
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... RT9261/A Electrical Characteristics Parameter Output Voltage Accuracy Input Voltage Start-up Voltage Hold-on Voltage ≤ 3.5V V OUT Efficiency 3.5V < V OUT ≤ 3.5V V OUT Input Current 1 3.5V < V OUT V ≤ 3.5V OUT Input Current 2 3.5V < V OUT ≤ 3. Switching OUT Current 3.5V < V OUT LX Leakage Current CE “H” Level CE “ ...
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... V = 0.4V EXT (2) ≤ OUT OUT OUT MAX ” L” ) side OSC LX LX switch on = 1.8V, VSS = 0V 10mA OUT = 3V, VSS = 0V 10mA OUT RT9261/A Min Typ - 0. → OUT -- 6 -1.5 -- – × ...
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... RT9261/A Function Block Diagram LX GND EXT Notes: (1) LX Pin .…… only for 9261- (2) EXT Pin …… only for 9261A- (3) CE Pin …… only for 9261- Pin Description Pin No. -xxCX A-xxCX -xxCB www.richtek-ic.com.tw ...
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... V IN DS9261/A-03 January 2002 Preliminary D1 1N5819 L1 RT9261CX LX VOUT GND Fig 0.01µF 1N5819 Cb RT9261ACX EXT VOUT GND Rb Tr 300Ω Fig 1N5819 RT9261CB LX NC EXT VOUT CE GND Fig. 3 RT9261/A V OUT + Co _ 22µF V OUT + Co _ 22µF V OUT + Co _ 22µF www.richtek-ic.com.tw 7 ...
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... RT9261/A 27µ www.richtek-ic.com.tw 8 Preliminary L1 D1 1N5819 RT9261ACB NC 0.01µ EXT VOUT CE GND ZTX 650 Rb Tr 300Ω Fig 1N5819 RT9261CB LX 27µH NC EXT VOUT CE CE GND IN Fig OUT + Co _ 22µF V OUT + Co _ 22µF DS9261/A-03 January 2002 ...
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... RT9261 V = 2.7V OUT 2.90 2.5V 2.0V 2.85 2.80 2.75 2.70 2.65 RT9261 V = 2.7V OUT 2. 100 2.0V 2.5V RT9261 V = 2.7V OUT 60 80 100 RT9261/A RT9261(2.7V) Output Current vs. Ripple Voltage 120 100 80 2.0V 60 1. Output Current (mA) Output Voltage vs. Temperature -40 - Temperature ( C) ° Supply Current vs. Temperature Input Current 2 10 ...
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... RT9261A (2.7V) Output Voltage vs. Output Current 3.0 2.5 2.0 1.5 1.0 0.5 0 Output Current (mA) RT9261A (2.7V) Efficiency vs. Output Current Output Current (mA) RT9261A (2.7V) Output Current vs. Ripple Voltage 120 100 Output Current (mA) DS9261/A-03 January 2002 2.5V 2.0V 1.5V 1.0V 0.9V RT9261A V = 2.7V OUT 120 150 2.5V 2.0V 0.9V 1.5V 1 ...
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... SOT-89 Surface Mount RT9261 Dimensions In Inches Min Max 0.055 0.063 0.014 0.019 0.094 0.102 0.016 0.021 -- 0.167 0.031 0.047 0.173 0.181 ...
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... RT9261 Symbol www.richtek-ic.com.tw 12 Preliminary Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.559 2.591 2.997 2.692 3.099 0.838 1.041 0.102 0.254 0.356 0.610 SOT- 25 Surface Mount Package H L Dimensions In Inches ...
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... DS9261/A-03 January 2002 Preliminary RT9261/A www.richtek-ic.com.tw 13 ...
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... RT9261/A RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 www.richtek-ic.com.tw 14 Preliminary RICHTEK TECHNOLOGY CORP. Taipei Office (Marketing) 8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek-ic.com.tw ...