rt8020 Richtek Technology Corporation, rt8020 Datasheet
rt8020
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rt8020 Summary of contents
Page 1
... The RT8020 is a dual high-efficiency Pulse-Width- Modulated (PWM) step-down DC-DC converter capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8020 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources within the range such as cellular phones, PDAs and other hand- held devices ...
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... NC2 3, Exposed Pad (13) GND FB2 4 FB1 GND 5 NC1 LX1 6 EN1 R11 VIN1 850k L1 2.2uH C OUT1 4.7uF Figure 1. Adjustable Voltage Regulator L2 2.2uH RT8020 IN2 1 VIN2 EN2 C 2 IN2 LX2 NC2 4.7uF 3, Exposed Pad (13) FB2 GND 4 FB1 GND 5 NC1 LX1 VIN1 7 6 EN1 L1 2 ...
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... Chip Enable of Channel 2 (Active High). V ENx OSC and Current Limit Shutdown Detector Control Current Sense PWM Comparator Control Error UVLO and RC Power Good Detector COMP V REF Pin Function . IN ≦ V EN1 IN1. ≦ V EN2 IN2. VINx RS1 Driver Logic RS2 RT8020 LXx GND www.richtek.com 3 ...
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... RT8020 Absolute Maximum Ratings Supply Input Voltage IN1 IN2 EN1, FB1, LX1, EN2, FB2 and LX2 Pin Voltage -------------------------------------------------------------- 0. Power Dissipation WDFN-12L 3x3 ------------------------------------------------------------------------------------------------------- 1.667W Package Thermal Resistance (Note 4) l WDFN-12L 3x3, -------------------------------------------------------------------------------------------------- 60 C/W JA WDFN-12L 3x3, ------------------------------------------------------------------------------------------------- 8.2 C/W JC Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------- 260 C ...
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... OUT 2.5V to 5.5 V LIM_P 2.5V to 5.5V EN_H 2.5V to 5.5V EN_L 3.6V 100mA OSC IN OUT 3.6V high effective four layers thermal conductivity test board of A RT8020 Min Typ (Note 2.5V 0. 3.6V 0. 2.5V 0. 3.6V 0.25 IN 1.4 1.5 1 ...
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... RT8020 Typical Operating Characteristics Efficiency vs. Output Current 100 3.3V 4 OUT 0 0 0.1 0.2 0.3 0.4 Output Current (A) Efficiency vs. Output Current 100 1.2V 2 OUT 0 0 0.1 0.2 0.3 0.4 Output Current (A) EN Pin Threshold vs. Input Voltage 1.20 1.15 1.10 1.05 Rising 1 ...
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... Temperature ( C) Switching Frequency vs. Temperature 1.6 1.55 1.5 1.45 1.4 1.35 1.3 1. 3.6V 1.2V OUT 1.2 -40 -25 - Temperature ( C) Output Current Limit vs. Temperature 2.4 2 5.0V IN 2.2 2 3.6V IN 2.0 1.9 1 3.3V IN 1.7 1.6 1.5 1.4 -40 -25 - Temperature ( C) RT8020 V = 3.6V OUT 110 125 = 300mA OUT 110 125 V = 1.2V OUT 110 125 www.richtek.com 7 ...
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... RT8020 Power On from 3.6V 1.2V OUT V EN (2V/Div) V OUT (1V/Div (500mA/Div) Time (100 s/Div) Power On from 3.6V 1.2V OUT V IN (2V/Div) V OUT (1V/Div (1A/Div) Time (250 s/Div) Load Transient Response V = 3.6V 1.2V OUT V OUT (50mV/Div) I OUT (500mA/Div) Time (50 s/Div) www ...
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... OUT (10mV/Div (2V/Div) Time (500ns/Div) DS8020-03 August 2007 = 50mA to 1A OUT V OUT (50mV/Div) I (500mA/Div OUT V OUT (10mV/Div) (2V/Div) Load Transient Response V = 5.0V 1.2V OUT OUT OUT Time (50 s/Div) Ripple V = 5.0V 1.2V OUT OUT V LX Time (500ns/Div) RT8020 = 50mA to 0. www.richtek.com 9 ...
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... RT8020 Applications Information The basic RT8020 application circuit is shown in Typical Application Circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and operating frequency followed by C and OUT Inductor Selection For a given input and output voltage, the inductor value and operating frequency determine the ripple current ...
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... IN quiescent current oppears due to two and Q are the gate charges of the internal top losses are calculated from the resistances of the and external inductor R SW RT8020 loss IN that is typically www.richtek.com 11 ...
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... C) / (60 C/W) = 1.667W for D(MAX) WDFN-12L 3x3 packages The maximum power dissipation depends on operating ambient temperature for fixed T resistance . For RT8020 packages, the Figure 4 of de- JA rating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. www.richtek.com 12 ...
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... JMK107BJ106MA JMK212BJ106RD DCR Current Rating (m ) (mA) 60 1480 120 1020 75 1500 4.5 x 3.2 x 1.55 135 1000 4.5 x 3.2 x 1.55 58 1500 3.85 x 3.85 x 1.8 146 1100 3.85 x 3.85 x 1.8 and C IN OUT Capacitance ( F) 4.7 10 4 RT8020 Dimensions (mm 1 1.5 Case Size 0603 0805 0603 0805 0603 0603 0805 www.richtek.com 13 ...
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... RT8020 Outline Dimension 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 14 Note : The configuration of the Pin #1 identifier is optional, but must be located within the zone indicated. Dimensions In Millimeters ...