RT9214GSP RICHTEK [Richtek Technology Corporation], RT9214GSP Datasheet
RT9214GSP
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RT9214GSP Summary of contents
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Synchronous Buck PWM DC-DC Controller General Description The RT9214 is a high efficiency synchronous buck PWM controllers that generate logic-supply voltages in PC based systems. These high performance , single output devices include internal soft-start, frequency compensation networks and ...
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RT9214 Typical Application Circuit 1uF 200-1k Functional Pin Description BOOT (Pin 1) Bootstrap supply pin for the upper gate driver. Connect the bootstrap capacitor between BOOT pin ...
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Function Block Diagram Bias & Regulators (3V_Logic & 3VDD_Analog) 0.6V FB DS9214-13 September 2007 VCC Power On Reference Reset 0.8V REF Soft-Start + UV_S & - Fault Logic + Oscillator (300kHz) GND RT9214 + EN ...
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RT9214 Absolute Maximum Ratings Supply Voltage, V -------------------------------------------------------------------------------------- 16V CC BOOT ------------------------------------------------------------------------------------ 16V BOOT PHASE PHASE to GND DC ------------------------------------------------------------------------------------------------------------- −5V to 15V < 200ns ------------------------------------------------------------------------------------------------------ −10V to 30V BOOT to PHASE ------------------------------------------------------------------------------------------ 15V BOOT to GND ...
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Parameter Oscillator Free Running Frequency Ramp Amplitude Error Amplifier (GM) E/A Transconductance Open Loop DC Gain PWM Controller Gate Drivers (V Upper Gate Source Upper Gate Sink Lower Gate Source Lower Gate Sink Dead Time Protection FB Under-Voltage Trip OC ...
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RT9214 Typical Operating Characteristics (V = 2.5V, unless otherwise specified ) OUT Efficiency vs. Output Current 1 0.95 0.9 0.85 0.8 0.75 0.7 0. 12V 0 Output Current (A) Reference ...
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V Switching CC V OUT I OUT UGATE 12V 10A OUT IN Time (10ms/Div) Power Off OUT V IN UGATE OUT Time ...
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RT9214 Transient Response (Falling 2.2uH C = 2000uF UGATE (10V/Div) V OUT (100mV/Div 12V 15A to 0A OUT I L Freq. = 1/20ms (10A/Div 2.5A/us Time (25us/Div) www.richtek.com ...
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Application Information Inductor Selection The selection of output inductor is based on the considerations of efficiency, output power and operating frequency. Low inductance value has smaller size, but results in low efficiency, large ripple current and high output ripple voltage. ...
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RT9214 The AC impedance of output capacitor at operating frequency is quite smaller than the load impedance, so the ripple current (Δ the inductor current flows mainly L through output capacitor. The output ripple voltage is described as ...
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OPS (Over Current Setting, VIN_POR and Shutdown) 1.OCP Sense the low-side MOSFET’ DS(ON) Connecting a resistor (R ) from this pin to the source of the upper MOSFET and the drain of the lower MOSFET OCSET sets the ...
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RT9214 2. VIN_POR UGATE will continuously generate a 10kHz clock with 1% duty cycle before V is ready detecting V crossing 1.5V four times (rising & OPS falling). R must be kept lower than 37.5kΩ for large ...
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Under Voltage Protection The voltage at FB pin is monitored and protected against UV (under voltage). The UV threshold is the FB or FBL under 80%. UV detection has 15μs triggered delay. When OC is trigged, a hiccup restart sequence ...
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RT9214 5V/12V GND Figure 9. The connections of the critical components in the converter Below PCB gerber files are our test board for your reference : www.richtek.com 14 IQ1 IL V OUT Q1 IQ2 Q2 VCC GND LGATE RT9214 UGATE ...
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According to our test experience, you must still notice two items to avoid noise coupling : 1.The ground plane should not be separated. 2.V rail adding the LC filter is recommended. CC DS9214-13 September 2007 RT9214 www.richtek.com 15 ...
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RT9214 Outline Dimension Symbol www.richtek.com Dimensions In Millimeters Min Max 4.801 5.004 3.810 3.988 1.346 1.753 0.330 0.508 1.194 1.346 0.170 0.254 0.050 ...
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EXPOSED THERMAL PAD (Bottom of Package) Symbol Option 1 Option 2 Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 DS9214-13 September ...