RT9266 RICHTEK [Richtek Technology Corporation], RT9266 Datasheet
RT9266
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RT9266 Summary of contents
Page 1
... Tiny Package, High Efficiency, Step-up DC/DC Converter General Description The RT9266 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents ...
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... RT9266 Typical Application Circuit V IN Figure 1. RT9266 Typical Application for Portable Instruments 3. for 12V 2. for www.richtek.com 100uF VDD EN RT9266 LX EXT GND FB L1 4.7uH C4 RVDD 100uF 100 CVDD 1uF Q1 VDD EXT N MOS RT9266 LX C3 0.1uF ...
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... 3.3V/5V C1 1uF EN DS9266-12 May 2007 L1 3 100uF C2 1uF VDD LX EN RT9266 EXT GND FB Figure 3. RT9266 for Higher Current Applications L1 4.7uH 1uF 1uF 100 Q1 N MOS C7 VDD LX 1uF RT9266 FB GND EXT Figure 4. RT9266 for Multi-Output Applications D1 V OUT 3.3V/5V 1N5819 R1 1 ...
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... Pin Function EN Chip Enable (Active High) EXT Output Pin for Driving External NMOS GND Ground LX Pin for Switching VDD Input Positive Power Pin of RT9266 Feedback Input Pin FB Internal Reference Voltage for the Error Amplifier is 1.25V. RT9266 - Loop Control Circuit + 1.25V VDD ...
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... LIMIT 3. 3. 3.5 ~ 6V, I LINE 2.5V 100mA LOAD 3. Min Typ -- 0. 0. 0.4 0.55 = GND 1.225 1.25 425 500 0.3 1 1.5 = 1mA *** -- 0.25 0.4 0 RT9266 + 0.3V) DD Max Units 1. 0 1.275 V 575 kHz -- % 1.1 ** 2.6 A 8.5 8.5 10 mV/V -- mV/mA 1.2 V ppm www.richtek.com 5 ...
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... RT9266 Note : * No Load Current is highly dependent on practical system design and component selection that cannot be covered by production testing. Typical No Load Current is verified by typical application circuit with recommended components. No Load Current performance is guaranteed by Switch Off Current and Continuous Switching Current. ** Current Limit is guaranteed by design at T ***Load Regulation is not tested at production due to practical instrument limitation ...
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... Output Current (mA) Supply Current I(V 180 load OUT 150 120 1.5 2.0 2.5 Input Voltage (V) DS9266-12 May 2007 010 100 1000 ) vs. Output Current 10 100 1000 ) vs. Input Voltage IN 3.0 3.5 4.0 4.5 RT9266 Efficiency vs. Output Current 3.3V 25°C OUT 0.1 1 ...
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... RT9266 Switching Swichting Frequency vs. V 600 V = 2.4V to 2.8V IN 500 400 300 V = 1.2V to 2.2V IN 200 100 Pin Voltage ( & Output Ripple 3.3V @ 100mA IN OUT Time (1 s/Div) LX & Output Ripple 3.3V @ 200mA IN OUT Time (1 s/Div) www.richtek.com 8 Pin Voltage 5. Start Up Voltage vs ...
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... LX & Output Ripple 200mA IN OUT Time (1 s/Div) LX & Output Ripple 200mA IN OUT Time (1 s/Div) DS9266-12 May 2007 RT9266 LX & Output Ripple 3.3V @ 10mA IN OUT Time (1 s/Div) LX & Output Ripple 20mA IN OUT Time (1 s/Div) LX & Output Ripple ...
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... RT9266 LX & Output Ripple V = 4.5V OUT Time (1 s/Div) Transient Response 3.3V IN OUT I = 10mA 200mA OUT Time (50 s/Div) Transient Response OUT I = 10mA 200mA OUT Time (50 s/Div) www.richtek.com 10 LX & Output Ripple V = 4.5V 20mA IN OUT Time (1 s/Div) Transient Response ...
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... Output Voltage vs. Temperature 3. 1.8V 3.32 3.3 3.28 3.26 3.24 3.22 3.2 -40 -10 20 Temperature DS9266-12 May 2007 = 3.3V OUT OUT 50 80 110 140 ( C) Output Voltage vs. Temperature 3V OUT 4.98 4.96 4.94 4.92 4.9 4.88 4.86 4.84 -40 - Temperature RT9266 = 5V OUT 80 110 140 ( C) www.richtek.com 11 ...
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... RT9266 Application Information Output Voltage Setting Referring to Typical Application Circuits, the output voltage of the switching regulator (V OUT (1 1.25V OUT R2 Feedback Loop Design Referring to Typical Application Circuits. The selection of R1 and R2 based on the trade-off between quiescent current consumption and interference immunity is stated ...
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... SOT-23-6 Surface Mount Package RT9266 H L Dimensions In Inches Min Max 0.031 0.051 0.000 0.006 0.055 0.071 0.010 0.022 0.102 0.118 0.106 0.122 0.033 ...
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... RT9266 Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com Dimensions In Millimeters Min Max 1.397 1.600 0.356 0.508 2.388 2.591 0.406 0.533 3 ...