RT8008GJ5 Richtek USA Inc, RT8008GJ5 Datasheet
RT8008GJ5
Specifications of RT8008GJ5
Available stocks
Related parts for RT8008GJ5
RT8008GJ5 Summary of contents
Page 1
High Efficiency PWM Step-Down DC/DC Converter General Description The RT8008 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 2.5V to 5.5V, the RT8008 is ideally ...
Page 2
RT8008 Typical Application Circuit ⎛ ⎞ ⎜ ⎟ OUT REF R2 ⎝ ⎠ with R2 = 300kΩ to 60kΩ so the I and (R1 x C1) should be in the range between 3x10 ...
Page 3
Functional Pin Description Pin Number Pin Name GND VIN 5 FB/VOUT Function Block Diagram Slope Compensation FB/VOUT Error Amplifier COMP DS8008-06 March 2011 Chip Enable (Active High, do not leave EN pin floating, and ...
Page 4
RT8008 Absolute Maximum Ratings Supply Input Voltage ------------------------------------------------------------------------------------------------------ 6.5V Enable, FB Voltage ------------------------------------------------------------------------------------------------------- V Power Dissipation 25° SOT-23-5, TSOT-23-5 ----------------------------------------------------------------------------------------------------- 0.4W Package Thermal Resistance (Note 2) SOT-23-5, TSOT-23-5, θ ----------------------------------------------------------------------------------------------- 250°C/W JA SOT-23-5, TSOT-23-5, ...
Page 5
Parameter FB Input Current PMOSFET R ON NMOSFET R ON P-Channel Current Limit EN High-Level Input Voltage EN Low-Level Input Voltage Under Voltage Lockout Threshold Hysteresis Oscillator Frequency Thermal Shutdown Temperature Min. On Time Max. Duty Cycle LX Leakage Current ...
Page 6
RT8008 Typical Operating Characteristics Efficiency vs. Load Current 100 0.01 0.11 0.21 Load Current (A) Output Voltage vs. Load Current 1.220 1.215 1.210 1.205 1.200 1.195 ...
Page 7
Reference Voltage vs. Input Voltage 0.6010 0.6005 0.6000 0.5995 0.5990 2.5 3 3.5 Input Voltage (V) Load Transient Response V = 3.3V 1.2V OUT V OUT (20mV/Div) I OUT (500mA/Div) Time (50μs/Div) Output Ripple V = ...
Page 8
RT8008 Power Off V = 3.3V 1.2V OUT V EN (2V/Div) V OUT (500mV/Div (200mA/Div) Time (100μs/Div) www.richtek.com 8 = 600mA OUT DS8008-06 March 2011 ...
Page 9
Applications Information The basic RT8008 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 C ...
Page 10
RT8008 polymer, aluminum electrolytic and ceramic capacitors are all available in surface mount packages. Special polymer capacitors offer very low ESR but have lower capacitance density than other types. Tantalum capacitors have the highest capacitance density but it is important ...
Page 11
Thus, to obtain I R losses, simply add R and multiply the result by the square of the average output current. Other losses including C and C IN losses and inductor core losses generally account for less than ...
Page 12
RT8008 Connect feedback network behind the output capacitors. } Keep the loop area small. Place the feedback components near the RT8008. Connect all analog grounds to a command node and } then connect the command node to the power ground ...
Page 13
Outline Dimension Symbol DS8008-06 March 2011 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 ...
Page 14
RT8008 Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Information that is provided by Richtek Technology Corporation is believed to ...