rt9259c Richtek Technology Corporation, rt9259c Datasheet
rt9259c
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rt9259c Summary of contents
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... Synchronous Buck PWM DC-DC and Linear Power Controller General Description The RT9259C is a dual-channel DC/DC controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a synchronous buck controller and an LDO controller. The synchronous buck controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion ...
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... PHASE 3 12 COMP PGND LGATE DRV FBL GND 7 8 VCC12 SOP-14 Typical Application Circuit Functional Pin Description Pin No. RT9259C S RT9259C A RT9259CPQV www.richtek.com 2 (TOP VIEW) 16 BOOT RT_DIS COMP DRV 5 12 ...
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... Pin No. RT9259C S RT9259C A RT9259CPQV 11, 12 Exposed Pad (17 Function Block Diagram Voltage Reference V REF2 FBL VCC12 - + DRV + Inhibit Shutdown V REF1 RT_DIS Oscillator GND DS9259C-03 August 2007 Pin Name Linear regulator feedback voltage. This pin is the ...
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... RT9259C Absolute Maximum Ratings Supply Voltage, V -------------------------------------------------------------------------------------- 15V CC PHASE to GND DC ------------------------------------------------------------------------------------------------------------- −5V to 15V < 200ns ------------------------------------------------------------------------------------------------------ −10V to 30V BOOT to PHASE ------------------------------------------------------------------------------------------ 15V BOOT to GND DC ------------------------------------------------------------------------------------------------------------- −0. < 200ns ------------------------------------------------------------------------------------------------------ −0.3V to 42V UGATE ------------------------------------------------------------------------------------------------------- V LGATE ------------------------------------------------------------------------------------------------------- GND − 0. DRV ---------------------------------------------------------------------------------------------------------- GND − 0. Input, Output or I/O Voltage ----------------------------------------------------------------------------- GND − 0. Power Dissipation 25° ...
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... UGATE R V – LGATE CC LG ATE LGATE LGA TE V UVP DRV V DRV I DRVSR I DRVSC = 25° high effective 4-layers 2S2P thermal conductivity test board A RT9259C Min Typ 250 300 -- 1.6 0.792 0.8 0.792 0 12V 0.36 0.4 ...
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... RT9259C Typical Operating Characteristics Dead Time No Load, Falling V IN1 (5V/Div) Time (25ns/Div) V OUT1 (2V/Div (10A/Div) Time (2.5ms/Div) Shut Down Full Load (20V/Div) (10V/Div) (500mV/Div) (1V/Div) Time (5μs/Div) www.richtek.com 6 UGATE PHASE (5V/Div) LGATE OCP (10V/Div) (10V/Div) (0.5A/Div) (200mV/Div) UGATE (5V/Div) ...
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... IN1 OUT1 20A LOAD V = 12V 2.5V IN2 OUT2 100mA LOAD (10V/Div) (20V/Div) (500mV/Div) (1V/Div) RT9259C Start 20A LOAD RT_Dis V OUT1 Time (1ms/Div) Transient Response V = 12V IN1 OUT1 I = 20A to 1A LOAD Time (10μs/Div) Under Voltage Protection ...
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... Internal 5VDD Regulator It is highly recommended to power decoupled 12V to VCC12 pin. VCC12 powers the RT9259C control circuit, low side gate driver and bootstrap circuit for high side gate driver. A bootstrap diode is embedded to facilitates PCB design and reduce the total BOM cost. No external Schottky diode is required ...
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... UVP is triggered if one of the feedback voltages is under (50 with a 30us delay. As shown in Figure 4, REFX the RT9259C PWM controller is shut down when V lower than the UVP threshold. In Figure 5, the RT9259C shuts down after 4 time UVP hiccups triggered by DS9259C-03 August 2007 UGATE (20V/Div) ...
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... RT9259C If MOSFET with R = 16mΩ is used, the OCP DS(ON) threshold current is about 25A. Once OCP is triggered, the RT9259C enters hiccup mode and re-soft starts again. The RT9259C shuts down after 4 time OCP hiccups. Inductor Current (20A/Div) Time (2.5ms/Div) Figure 6. Shorted then Start Up Time (5μ ...
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... W for D(MAX 125°C − 25°C) / 100°C/W = 1.000 W for D(MAX 125°C − 25° 110°C/W = 0.909 W for D(MAX) J (MAX) . For RT9259C packages, the Figure 11 of derating RT9259C is the maximum A is 54°C/W on the JA = 25°C can be ...
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... Ambient Temperature Figure 11. Derating Curves for RT9259C Packages PCB Layout Considerations MOSFETs switch very fast and efficiently. The speed with which the current transitions from one device to another causes voltage spikes across the interconnecting impedances and parasitic circuit elements. The voltage spikes can degrade efficiency and radiate noise, that results in over-voltage stress on devices ...
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... Lead SOP Plastic Package RT9259C H M Dimensions In Inches Min Max 0.336 0.344 0.150 0.157 0.053 0.069 0.013 0.020 0.047 0.053 0.007 0.010 0.004 ...
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... RT9259C Symbol www.richtek.com Dimensions In Millimeters Min Max 1.346 1.753 0.102 0.254 1.499 0.203 0.305 0.178 0.254 4.801 5.004 0.635 5.791 6.198 3.810 3.988 0.406 1.270 16-Lead SSOP Plastic Package c L Dimensions In Inches ...
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... V-Type 16L QFN 4x4 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 RT9259C 1 2 DETAIL A Pin #1 ID and Tie Bar Mark Options Dimensions In Inches Min Max 0 ...