RT9263 Richtek, RT9263 Datasheet
RT9263
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RT9263 Summary of contents
Page 1
... C: Commercial standard C : Chip enable control E : Driver for external power devices Typical Application Circuit + V IN Fig. 1 RT9263CCX5 Typical Application for Portable Instruments below 400mA DS9263-00 November 2001 Preliminary High Efficiency, Low Supply Current, Step-up DC/DC Converter Features 1.0V Low Start-up Input Voltage High Supply Capability to Deliver 3.3V 100mA with 1V Input Voltage 17µ ...
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... LX RT9263ECX5 EXT GND FB Fig Output Current Application L1 10µH VDD Q1 EXT NMOS RT9263ECX5 LX 0.1µF GND FB Rm 0.05~0.1Ω µ NMOS VDD 0.1 µ F RT9263CCX5 LX CE GND FB 100µ 1.6M 4.7µH 3.3V V OUT1 Q1 D1 NMOS 1N5819 R2 980K + C2 C1 1µF 100µF D1 15V ...
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... Function Block Diagram VDD FB CE VDD FB DS9263-00 November 2001 Preliminary RT9263CCX5 _ Loop Control Circuit 1.25V RT9263ECX5 _ Loop Control Circuit 1.25V RT9263 LX Q1 NMOS R1 GND EXT LX Q1 NMOS R1 GND www.richtek-ic.com.tw 3 ...
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... Output pin for driving external NMOS or NPN EXT When driving an NPN, a resistor should be added for limiting base Chip enable CE RT9263CCX5 gets into shutdown mode when CE pin set to low. VDD Input positive power pin of RT9263 Feedback input pin FB Internal reference voltage for the error amplifier is 1.25V. ...
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... Close Loop, VDD = 3.3V REF F VDD = 3. VDD = 3.3V MAX VDD = 3.3V I VDD = 3.3V LIMIT VDD = 3.3V VDD = 3.3V ∆ 1.5 ~ 2.5V LINE ∆ 2.5V 100mA IN L LOAD VDD = 3.3V Guaranteed by Design Guaranteed by Design SD ∆T Guaranteed by Design SD RT9263 Min Typ Max -- 0.98 1.05 0 0.1 1 1.225 1.25 1.275 -- 550 -- -- 0. ...
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... RT9263 Typical Operating Charateristics Efficiency V OUT No Load Current Refer to Application Circuit Fig 1.2 1.5 Input Voltage (V) Start Up Voltage 1 25° 3.3V 1.3 OUT 1.2 1.1 1.0 0.9 Refer to Application Circuit Fig.1 0 (mA) in constant resistance load LOAD LOAD www.richtek-ic.com.tw 6 Preliminary = 3. 25°C ...
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... Minimized FB node copper area and keep far away from noise sources. • Minimized parasitic capacitance connecting to LX and EXT nodes, which may cause additional switching loss may damage RT9263 OUT1 may drastically rise OUT1 voltage fluctuation, and IC damage. To OUT1 ...
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... RT9263 Package Information Symbol www.richtek-ic.com.tw 8 Preliminary Dimensions In Millimeters Min Max 1.400 1.600 0.360 0.520 2.400 2.600 0.406 0.533 -- 4.250 0.800 -- 4.400 4.600 -- 1.700 1.400 1.600 0.380 0.430 5-Lead SOT-89 Surface Mount ...
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... DS9263-00 November 2001 Preliminary RT9263 www.richtek-ic.com.tw 9 ...
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... RT9263 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 10 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 ...