rt9210 Richtek Technology Corporation, rt9210 Datasheet
rt9210
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rt9210 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 convert voltage supplies ranging from 4.5V to 5.5V into efficiently 2.5V memory, V ...
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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 1 SENSE1 UGATE1 20 3 V2_SD PHASE1 22 8 PVCC1 VREF_IN 23 4 LGATE1 VREF 24 PGND1 6 COMP1 11 C5 BOOT2 5 ...
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... N-MOSFET. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the lower MOSFET has turned off. VCC (Pin 15) Connect this pin to a well-decoupled 5V bias supply also the positive supply for the lower gate driver, LGATE2. RT9210 REF supply. A 100pF TT www.richtek.com 3 ...
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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 and as the regulation point for the window TT regulator that is enable in V2_SD mode. PGOOD (Pin 19) ...
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... Oscillator + FB2 90 deg shift Zc Window GNDA Thermal Bias SHDN Power + POR OC 40uA On - Reset Soft- Start 1 PWM1 + - OC Control OV Logic UV Thermal SHDN PWM2 - + OC Control VCC Logic OV UV Thermal SHDN RT9210 OCSET/SD BOOT1 UGATE1 PHASE1 PVCC1 LGATE1 PGND1 PGND2 LGATE2 UGATE2 BOOT2 www.richtek.com 5 ...
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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 Junction Temperature ------------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C Storage Temperature Range ---------------------------------------------------------------------------------------- ...
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... Load T DT ΔFB FB1 Rising 1OVT ΔFB FB1 Falling 1UVT 4.5V OCSET OCSET/ SD Shutdown V IL Enable FB1 & Sense2 Rising V PGOOD+ FB1 & Sense2 Rising V PGOOD- RT9210 Min Typ Max Units ± ± Ω Ω Ω Ω ...
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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 (5ms/Div) www.richtek.com 8 Preliminary V CC 5V/Div V DDQ 1V/Div V TT 5V/Div V CC 5V/Div ...
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... Vvs_sd 2V/Div 5V/Div UGATE2 Short 1V/Div 500mV/Div 10V/Div UGATE2 LGATE Phase Shift Time (1μs/Div) V Return from Sleep Mode TT 5V/Div 2V/Div V DDQ 20mV/Div V TT 5V/Div Time (5μs/Div) V Short FB1 Time (10ms/Div) RT9210 5V/Div 5V/Div 500mV/Div 500mV/Div 10V/Div www.richtek.com 9 ...
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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 2.5V, DDQ 1.25V TT Time (100μs/Div) Reference Voltage vs. Temperature 0.802 0.801 0.8 0.799 0.798 0.797 0.796 0.795 ...
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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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... One of the parameters limiting the converter's response to a load transient is the time required to change the inductor current. Given a sufficiently fast control loop design, the RT9210 will provide 0% to 100% duty cycle in response to a load transient. www.richtek.com 12 ...
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... ESR RT9210, the VDDQ only sources current but the V can sink and source current. When sourcing current, the upper MOSFET supports most of the switching losses. On the contrary, the lower MOSFET supports most of the ), maximum output GS switching losses when V ...
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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 regulation, a adequate compensator design is necessary. The goal of the compensation network is to provide adequate phase margin (greater than 45 degrees) and the highest 0dB crossing frequency ...
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... The goal is to localize the high current path to a separate loop that does not interfere with the more sensitive analog control function. These two grounds must be connected together on the PC board layout at a single point. RT9210 as close as possible to the BOOT and BOOT www.richtek.com 15 ...
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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 6.500 4.300 4.500 0.450 0.750 24-Lead TSSOP Plastic Package L A2 Dimensions In Inches ...
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... SOP Plastic Package Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com RT9210 H M Dimensions In Inches Min Max 0.598 0.614 0.291 0.299 0.093 ...