RT9210GC RICHTEK [Richtek Technology Corporation], RT9210GC Datasheet
RT9210GC
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RT9210GC Summary of contents
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Dual 5V Synchronous Buck DC-DC PWM Controller for DDR Memory V General Description The RT9210 is a dual high power, high efficiency synchronous buck DC-DC controller optimized for high performance double data rate (DDR) memory applications designed to ...
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RT9210 Typical AppIication Circuit V IN 2.5V/3.3V/5V R1 3.48k Q5 RESET VTT_SD VREF_IN C3 100pF C4 0.1uF C6 VREF_OUT 100pF C7 0.1uF 1k www.richtek.com 2 Preliminary C2 1uF C1 1nF RT9210 15 19 VCC PGOOD 21 2 OCSET/SD BOOT1 7 ...
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Functional Pin Description UGATE1 (Pin 1) V upper gate driver output. Connect to gate of the high- DDQ side power N-MOSFET. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off. ...
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RT9210 NC (Pin 18) No internal connection. SENSE2 (Pin 17) This pin is connected directly to the regulated output of V supply. This pin is also used as the feedback pin of TT the V regulator ...
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Function Block Diagram VCC FB1 Power PGOOD Good COMP1 VREF VREE_IN SENSE1 SENSE2 Regulator V2_SD DS9210-05 March 2007 Preliminary 137.5% 0.8V 62.5% Ref. OV OVP 0.8V & UV UVP + + 200k 200k 300kHz Oscillator + ...
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RT9210 Absolute Maximum Ratings Supply Voltage, V -------------------------------------------------------------------------------------------------- 7V CC ------------------------------------------------------------------------------------------------ 7V BOOT BOOT PHASE Input, Output or I/O Voltage ----------------------------------------------------------------------------------------- GND-0. Package Thermal Resistance TSSOP-24, θ --------------------------------------------------------------------------------------------------------- 100°C/W JA SOP-24, θ ------------------------------------------------------------------------------------------------------------ 90°C/W JA ...
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Parameter Window Regulator Load Current Output Voltage Error PWM Controller Gate Drivers Upper Gate Source (UGATE1 and 2) Upper Gate Sink (UGATE1 and 2) Lower Gate Source (LGATE1 and 2) Lower Gate Sink (LGATE1 and 2) Upper Gate Rising Time ...
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RT9210 Typical Operating Characteristics POR ( Start Up) 1V/Div Time (5ms/Div) Power Good Rising 5V/Div V CC 5V/Div PGOOD 2V/Div V DDQ Time (5ms/Div) Power DDQ 2V/Div 1V/Div UGATE1 5V/Div Time ...
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UGATE Phase Shift UGATE1 UGATE2 Time (1μs/Div) V Sleep Mode TT 5V/Div Vvs_sd 2V/Div V DDQ 20mV/Div V TT UGATE2 Time (5μs/Div) V DDQ V DDQ V FB1 UGATE1 Time (10ms/Div) DS9210-05 March 2007 Preliminary 5V/Div LGATE1 5V/Div LGATE2 Vvs_sd ...
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RT9210 V DDQ V DDQ DDQ 2.5V DDQ Time (250μs/Div) V Sink & Source TT 100mV/Div V DDQ 100mV/Div 2000μF OUT ...
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POR vs. Temperature 4.4 4.2 4 3.8 3.6 3.4 3.2 3 -40 -10 20 Temperature (°C) DS9210-05 March 2007 Preliminary Rising Falling 50 80 110 140 RT9210 www.richtek.com 11 ...
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RT9210 Applications Information Inductor The inductor is required to supply constant current to the output load. The inductor is selected to meet the output voltage ripple requirements and minimize the converter's response time to the load transient. A larger value ...
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Output Capacitor The output capacitor is required to maintain the DC output voltage and supply the load transient current. The capacitor must be selected and placed carefully to yield optimal results and should be chosen to provide acceptable ripple on ...
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RT9210 Feedback Compensation The RT9210 is a voltage mode controller; the control loop is a single voltage feedback path including an error amplifier and PWM comparator as Figure 1 shows. In order to achieve fast transient response and accurate output ...
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High crossover frequency is desirable for fast transient response, but often jeopardize the system stability. In order to cancel one of the LC filter poles, place the zero before the LC filter resonant frequency. In the experience, place the zero ...
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RT9210 Outline Dimension Symbol www.richtek.com 16 Preliminary Dimensions In Millimeters Min Max 0.850 1.200 0.050 0.150 0.800 1.050 0.190 0.300 7.700 7.900 0.650 6.300 ...
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J I Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 DS9210-05 March 2007 Preliminary Dimensions ...