rt9206 Richtek Technology Corporation, rt9206 Datasheet
rt9206
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rt9206 Summary of contents
Page 1
... High Efficiency, Synchronous Buck with Dual Linear Controllers General Description The RT9206 is a low cost, combo power controller, which integrates a synchronous step-down voltage-mode PWM and two HV linear controllers. Directly drive external N-MOSFET makes it easy to implement a high efficiency and cost attractive power solution. Voltage mode control ...
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... GND C13 9 8 SS/ R10 1uF EN 51k C SS PGOOD Figure 1. Typical Application for 12V Input C15 500pF 1uF R2 11k 1 LDRV1 LFB1 C16 500pF RT9206CS 2 VDD BOOT 3 LDRV2 UGATE R3 11k 4 LFB2 PHS 5 COMP VINT 6 FB LGATE 220pF 7 PGOOD GND C13 8 SS/EN RT ...
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... Function Block Diagram LFB1 0.8V LFB2 VDD COMP FB SS/EN PGOOD DS9206-11 March 2007 LCTR2 + - + 6.0V Reg + 0. PWM CP - RAMP Soft Start Generator 8uA + OVP 0.72V LCTR1 0.8V + LDRV1 - + LDRV2 VINT Thermal Protection BOOT UGATE Driver PHS Control VINT Logic LGATE GND OSC RT RT9206 www.richtek.com 3 ...
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... RT pin and ground. Soft-Start RT9206 has a programmable soft-start to control the output voltage rise time and limit the current surge at the start- up. The soft-start will begin while V threshold for correct start-up. Soft-start function operates by an internal sourcing current to charge an external capacitor to around the voltage of VINT ...
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... High side floating driver supply with (+) terminal bootstrap flying capacitor connection. Voltage swing is from a diode drop below VINT to VIN+VINT LFB1 (Pin 16) LDO1 feedback input. The feed back set point is 0.8V. Connect to a resistive divider between the positive linear regulator output and GND to adjust the output voltage. RT9206 3 www.richtek.com 5 ...
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... RT9206 Absolute Maximum Ratings Supply Voltage (V ) ------------------------------------------------------------------------------------------------ 0.3 to 30V l IN PHS --------------------------------------------------------------------------------------------------------------------- 0.6V to 30V l PHS (PHS Transient Time Interval < 50ns) --------------------------------------------------------------------- 5V l BOOT PHS --------------------------------------------------------------------------------------------------- 0. BOOT to GND -------------------------------------------------------------------------------------------------------- 0.3V to 35V l LDRI1, LDRI2 --------------------------------------------------------------------------------------------------------- 0.3V to 30V l Power Good Voltage ------------------------------------------------------------------------------------------------- 0. The other pins -------------------------------------------------------------------------------------------------------- 0. Power Dissipation SOP-16 ---------------------------------------------------------------------------------------------------------------- 0 ...
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... R LGATE R LGATE 12V, C R_UGATE DD LOAD 12V, C F_UGATE DD LOAD 12V, C R_LGATE DD LOAD 12V, C F_LGATE DD LOAD VFB VFB LFB1 / LFB2 LDRV1/LDRV2 LFB1 / LFB2 RT9206 Min Typ Max 0.784 0.8 0.816 5 160 200 240 -30 -- + 140 45 90 140 ...
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... RT9206 Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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... V OUT1 2V/Div V OUT3 2V/Div V 5V/Div OUT2 PGOOD V IN 20V/Div BOOT 5V/Div PHS 20V/Div UGATE 20V/Div LGATE V IN RT9206 Power On 5V/Div I OUT1 I OUT2 = 24V 200kHz I OUT3 Time (200ms/Div) Power Off I OUT1 I OUT2 I OUT3 = 24V 200kHz Time (20ms/Div) Bootstrap Wave Form = 24V Time (1 s/Div) www ...
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... RT9206 Dead Time LGATE 2V/Div UGATE 5V/Div V = 12V OUT1 Time (20ns/Div) Dead Time UGATE 5V/Div LGATE 2V/Div V = 12V OUT1 Time (20ns/Div) Dynamic Loading UGATE 10V/Div LGATE 5V/Div V OUT1 100mV/Div I OUT1 5A/Div Time (10 s/Div) www.richtek.com 10 LGATE 2V/Div UGATE 10V/Div V = 24V, I ...
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... Temperature Reference Voltage vs. Temperature 0. 12V 200kHz 0.815 0.81 0.805 0.8 0.795 0.79 0.785 -50 - Temperature Quiescent Current vs. Input Voltage 1055 1050 1045 1040 1035 1030 1025 (V) IN RT9206 75 100 125 150 ( C) 75 100 125 150 ( www.richtek.com 11 ...
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... RT9206 Fosc vs. R 800 700 600 500 400 300 200 100 Over Current Threshold vs. Temperature 450 400 350 300 250 200 -50 - Temperature www.richtek.com 12V 12V 100 125 ...
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... Application Information Synchronous Buck Converter The RT9206 is specifically designed for synchronous buck converter with wide input voltage from 4.75V to 28V and operating frequency from 200kHz to 600kHz. To fully utilize its advantages, peripheral components should be appropriately selected. The following information provides basic considerations for component selection. ...
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... RT9206 OUT 1 Figure 2. The related waveforms of output capacitor. The AC impedance of output capacitor at operating frequency is quite smaller than the load impedance, so the ripple current ( the inductor current flows mainly L through output capacitor. The output ripple voltage is described as : Δ ...
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... The output voltage set point can be more accurate by using precision resistor. Soft-start setting Figure 4 shows the typical soft-start timing waveforms of C RT9206. The soft-start time of Buck converter can be set = 43m C by selecting the soft-start capacitance value. The delay time between input voltage applied and output voltage ...
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... PGOOD the RT9206. C with short and wide traces. Generally, a 4.7uF high frequency ceramic capacitor is recommended. Feedback Compensation The RT9206 is a voltage mode controller. The control loop is a single voltage feedback loop including a trans- ) conductance error amplifier and a PWM comparator achieve fast transient response and accurate output and switching frequency ...
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... C OUT( Gain VIN/ Phase 0° -90° -180° Figure 7. The Bode plot of Buck power stage RT9206 (s) of the direct C (19 (20 (Hz) (21) www.richtek.com 17 ...
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... RT9206 The effective series resistance (ESR) of capacitor and capacitance introduces one zero into system, the zero is given the voltage-mode Buck converter shown in Figure 5, the loop gain of system L(S) (S) P(S) (S) Vr The desired loop gain and phase margin is show in the Bode plot of Figure 8 ...
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... Figure 4, where the parameters as following: V =12V, V =5V OUT frequency=200kHz, L= parameters of RT9206 as following: gm=1.6ms, ramp amplitude=1.9V,and reference voltage Vref=0.8V. Step1. Determine the power stage poles and zeros. The pole caused by the output inductor and output capacitor is calculated ...
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... MOSFETs. MOSFETs should be as short as possible and can carry 1A peak current. Figure 11 shows the typical PCB layout of synchronous Buck converter with RT9206 controller Figure 11. The PCB layout of synchronous Buck converter with RT9206 controller DS9206-11 March 2007 ...
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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 RT9206 H M Dimensions In Inches Min Max 0.386 0.394 0.150 0.157 0.053 ...