RT8204BGQW Richtek USA Inc, RT8204BGQW Datasheet
RT8204BGQW
Specifications of RT8204BGQW
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RT8204BGQW Summary of contents
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Single Synchronous Buck with LDO Controller General Description The RT8204B PWM controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset ...
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RT8204B Pin Configurations Typical Application Circuit LEN LPGOOD www.richtek.com 2 (TOP VIEW UGATE VOUT 12 1 VDD PHASE 11 2 GND VDDP PGOOD WQFN-16L 3x3 ...
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Functional Pin Description Pin No. Pin Name 1 VOUT 2 VDD PGOOD 5 LPGOOD 6 LFB 7 LDRV 8 LGATE 9 VDDP PHASE 12 UGATE 13 BOOT 14 LEN 15 EN/DEM 16 TON 17 ...
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RT8204B Function Block Diagram PWM Controller TRIG On-time VOUT Compute TON 1-SHOT SS + (Internal 0.75V V REF + 115% V REF - FB - 70% V REF + SS Timer VDD GND EN/DEM LDO Controller ...
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Absolute Maximum Ratings Input Voltage, TON to GND ---------------------------------------------------------------------------------------------- BOOT to GND -------------------------------------------------------------------------------------------------------------- PHASE to BOOT ---------------------------------------------------------------------------------------------------------- PHASE to GND DC ----------------------------------------------------------------------------------------------------------------------------- −0.3V to 32V <20ns ------------------------------------------------------------------------------------------------------------------------ −8V to 38V VDD, VDDP, VOUT, EN/DEM, LEN, LFB, FB, PGOOD, LPGOOD, LDRV ...
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RT8204B Parameter Output Voltage Range On-Time Minimum Off-Time V Shutdown Discharge OUT Resistance Current Sensing I Source Current LIM Current Comparator Offset Zero Crossing Threshold Fault Protection Current Limit Sense Voltage Output UV Threshold OVP Threshold OV Fault Delay VDD ...
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Parameter PGOOD (upper side threshold decide by OV threshold) Trip Threshold (Falling) Fault Propagation Delay Output Low Voltage Leakage Current LDO Controller Quiescent Current I Shut-down Current I Input Voltage UVLO LEN Logic High Voltage V LEN Logic Low Voltage ...
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RT8204B Typical Operating Characteristics VOUT1 Efficiency vs. Load Current 100 90 80 DEM 0.001 0.01 Load Current (A) VOUT1 Efficiency vs. Load Current 100 90 80 DEM ...
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LDO Output Voltage vs. Output Current 1.0540 1.0535 1.0530 1.0525 1.0520 1.0515 1.0510 1.0505 1.0500 0 0.5 1 1.5 2 Output Current (A) Shutdown Current vs. Input Voltage 3.0 2.5 2.0 1.5 1.0 0.5 0 ...
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RT8204B VOUT1 Load Transient Response V OUT_ac (50mV/Div) I LOAD (5A/Div) UGATE (20V/Div) LGATE (5V/Div 12V Floating Time (10μs/Div) V OUT (1V/Div) Inductor Current (10A/Div) UGATE (20V/Div) LGATE (5V/Div Time (20μs/Div) LDO ...
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LDO Short-Circuit Protection V OUT (1V/Div) LDRI (5V/Div) I LOAD (20A/Div) LPGOOD (5V/Div 1.25V Time (100μs/Div) DS8204B-03 March 2011 = 10μ Short OUT OUT2 RT8204B www.richtek.com 11 ...
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RT8204B Application Information The RT8204B PWM controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. ...
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The switching waveforms may appear noisy and asynchronous when light loading causes diode-emulation operation, but this is a normal operating condition that results in high light-load efficiency. Trade-off in DEM noise vs. light-load efficiency is made by varying the inductor ...
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RT8204B MOSFET Gate Driver (UGATE, LGATE) The high side driver is designed to drive high current, low R N-MOSFETs. When configured as a floating driver, DS(ON) 5V bias voltage is delivered from VDDP supply. The average drive current is proportional ...
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R1 × + ⎜ ⎟ OUT FB ⎢ ⎥ R2 ⎝ ⎠ ⎣ ⎦ where V is 0.75V. FB Note that in order for the device to regulate in a controlled manner, ...
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RT8204B Find a low pass inductor having the lowest possible DC resistance that fits in the allowed dimensions. Ferrite cores are often the best choice, although powdered iron is inexpensive and can work well at 200kHz. The core must be ...
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The RT8204B LDO contains a power good output pin (LPGOOD pin) which is an open drain output that will be pulled low if the output is below the power good threshold (typically 90% of the programmed output voltage, or 93% ...
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RT8204B LDO_VIN LDRV R3 LFB R4 Figure 8. LDO Output Voltage Setting LDO Output Capacitor Selection Low ESR capacitors such as Sanyo POSCAPs or Panasonic SP-caps are recommended for bulk capacitance, and ceramic bypass capacitors are recommended for decoupling high ...
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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 Information that is provided by ...