RT9212GC RICHTEK [Richtek Technology Corporation], RT9212GC Datasheet
RT9212GC
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RT9212GC Summary of contents
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Dual 5V Synchronous Buck PWM DC-DC and Linear Power Controller General Description The RT9212 is a 3-in-one power controller delivers high efficiency and tight regulation from two voltage regulating synchronous buck PWM DC-DC and one linear power controllers. The RT9212 ...
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RT9212 Typical Application Circuit V IN 2.5V/3.3V/ 3.48k 3.48k 1nF 1nF Q5 Q6 RESET2 RESET1 3.3V C4 100uF 2SD1802 V OUT3 C6 2.5V C5 100pF R3 470uF 255 120 R7 1.25k www.richtek.com 2 ...
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Functional Pin Description UGATE1 (Pin 1) Channel 1 upper gate driver output. Connect to gate of the high-side power N-MOSFET. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off. BOOT1 ...
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RT9212 PGOOD (Pin 19) PGOOD is an open-drain output used to indicate that both the channel 1 and channel 2 regulators are within normal operating voltage ranges. OCSET2/SD (Pin 20), OCSET1/SD (Pin 21) Connect a resistor (R ) from this ...
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Absolute Maximum Ratings Supply Voltage, V ------------------------------------------------------------------------------------------------- 7V CC BOOT ----------------------------------------------------------------------------------------------- 7V BOOT PHASE Input, Output or I/O Voltage ---------------------------------------------------------------------------------------- GND-0. Package Thermal Resistance TSSOP-24, θ -------------------------------------------------------------------------------------------------------- 100°C/W JA Junction Temperature ------------------------------------------------------------------------------------------------ 150°C Lead Temperature ...
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RT9212 Parameter V2 Error Amplifier (Internal Compensation) DC Gain Linear Regulator DRV Driver Source 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 ...
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Typical Operating Characteristics Power Good Rising V CC (5V/Div) V OUT1 (2V/Div) V OUT2 (2V/Div) PGOOD (5V/Div) Time (5ms/Div) Power OUT1 OUT2 V OUT1 (2V/Div) V OUT2 (2V/Div) UGATE1 (10V/Div) UGATE2 (5V/Div) Time (5ms/Div) ...
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RT9212 Bootstrap UGATE1 (5V/Div) LGATE1 (5V/Div) Time (1us/Div) V OUT1 V OUT1 (2V/Div) UGATE1 (10V/Div) LGATE1 (5V/Div) Time (5ms/Div) V OUT1 V OUT1 (100mV/Div) I OUT1 (5A/Div 5V 3.3V OUT Time (250us/Div) www.richtek.com 8 ...
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V OUT3 1.8V IN OUT V OUT3 (200mV/Div) I OUT3 (2A/Div) Time (2.5ms/Div) POR (Rising/Falling) vs. Temperature 4.25 4.2 Rising 4.15 4.1 4.05 4 3.95 3.9 -40 -10 20 Temperature Iocset & Temperature 55 50 ...
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RT9212 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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RT9212 Vin PWM PWM + Comparator - VRAMP Figure 1 Modulator Frequency Equations The modulator transfer function is the small-signal transfer function This transfer function is dominated OUT E gain and the output ...
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Reference Voltage Because one of the RT9212 regulators uses a low 35dB gain error amplifier, shown in Figure 4. The voltage regulation is dependent reference voltage of 0.8V is trimmed 2.5V condition. In ...
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RT9212 Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com 14 Preliminary ...