RT8009-12GB Richtek USA Inc, RT8009-12GB Datasheet
RT8009-12GB
Specifications of RT8009-12GB
Available stocks
Related parts for RT8009-12GB
RT8009-12GB Summary of contents
Page 1
... The RT8009 is a high-efficiency pulse-width-modulated (PWM) step-down DC/DC converter. Capable of delivering 600mA output current over a wide input voltage range from 2.5 to 5.5V, the RT8009 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 handy-terminals ...
Page 2
... RT8009 Typical Application Circuit 2.5V to 5.5V 2.5V to 5.5V Layout Guide V IN VIN GND Layout note: 1. The distance that C connects should be placed near RT8009. OUT www.richtek.com VIN RT8009 4.7µ VOUT GND 2 Figure 1. Fixed Voltage Regulator VIN RT8009 4.7µ GND 2 Figure 2. Adjustable Voltage Regulator ...
Page 3
... Chip Enable (Active High, do not leave EN pin floating, and V Feedback Input Pin. Pin for Switching. EN OSC & Shutdown Control Current Sense PWM Comparator RC UVLO & Power Good Detector V REF Pin Function EN VIN Current Limit Detector Control Driver Logic Zero Detector GND RT8009 < 0.6V). IN RS1 LX RS2 www.richtek.com 3 ...
Page 4
... RT8009 Absolute Maximum Ratings Supply Input Voltage ---------------------------------------------------------------------------------------------------- 6.5V l Enable, FB Voltage ------------------------------------------------------------------------------------------------------ V l Power Dissipation 25° SOT-23-5, TSOT-23-5 --------------------------------------------------------------------------------------------------- 0.4W Package Thermal Resistance (Note 2) l SOT-23-5, TSOT-23-5, ---------------------------------------------------------------------------------------------- 250 C/W JA SOT-23-5, TSOT-23-5, --------------------------------------------------------------------------------------------- 130 C/W JC Junction Temperature Range ------------------------------------------------------------------------------------------ 150 C l Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------ 260 C l Storage Temperature Range ------------------------------------------------------------------------------------------- 150 C ...
Page 5
... 200mA DS(ON)_P OUT 200mA DS(ON)_N 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 low effective thermal conductivity test board of A RT8009 Min Typ (Note 3. 1.8 -- 0.1 0.8 1.25 -- 160 ...
Page 6
... RT8009 Typical Operating Characteristics Efficiency vs. Load Current 100 1.8V OUT 0 0.01 0.11 0.21 Load Current (A) Load Regulation 1.810 1.805 1.800 V = 5.5V IN 1.795 1.790 V = 2.5V IN 1.785 1.780 1.775 V = 1.8V OUT 1.770 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 Load Current (A) Frequency vs ...
Page 7
... Reference vs. Temperature 0.510 V = 3.3V 1.8V IN OUT 0.508 0.505 0.503 0.500 0.498 0.495 0.493 0.490 -50 - Temperature (°C) Load Transient Response V = 3.3V 1.8V 300mA to 600mA IN OUT OUT Time (100μs/Div) Power 3.3V 1.8V 600mA IN OUT OUT EN OUT Time (100μs/Div) RT8009 75 100 125 www.richtek.com 7 ...
Page 8
... RT8009 Applications Information The basic RT8009 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 ...
Page 9
... T B and thus their effects will losses are calculated from the resistances of the and external inductor R SW and the duty cycle (DC) as follows : DS(ON DS(ON)TOP DS(ON)BOT for both the top and bottom MOSFETs can be DS(ON) RT8009 that is typically DC) www.richtek.com 9 ...
Page 10
... 250 = 0.4 W for SOT-23-5/ D(MAX) TSOT-23-5 packages The maximum power dissipation depends on operating ambient temperature for fixed T resistance . For RT8009 packages, the Figure derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. The value of junction to case thermal resistance popular for users ...
Page 11
... Connect feedback network behind the output capacitors. } Keep the loop area small. Place the feedback components near the RT8009. Connect all analog grounds to a command node and } then connect the command node to the power ground behind the output capacitors. An example of 2-layer PCB layout is shown in Figure 7 } and Figure 8 for reference ...
Page 12
... RT8009 Outline Dimension Symbol www.richtek.com 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 0.080 0.254 0.300 0.610 SOT-23-5 Surface Mount Package H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 ...
Page 13
... TSOT-23-5 Surface Mount Package Richtek Technology Corporation Taipei Office (Marketing) 5F, No. 95, Minchiuan Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)86672399 Fax: (8862)86672377 Email: marketing@richtek.com RT8009 H L Dimensions In Inches Min Max 0.028 0.039 0.000 0.004 0.055 0.071 ...