rt9259 Richtek Technology Corporation, rt9259 Datasheet
rt9259
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rt9259 Summary of contents
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... Synchronous Buck PWM DC-DC and Linear Power Controller General Description The RT9259 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. RT9259 S RT9259 A RT9259PQV www.richtek.com 2 (TOP VIEW) BOOT RT_DIS 2 COMP DRV 5 FBL 6 GND 7 GND ...
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... Pin No. RT9259 S RT9259 A RT9259PQV 10 11, 12 Exposed Pad (17 Function Block Diagram Voltage Reference V REF2 FBL VCC12 - + DRV + Inhibit Shutdown V REF1 Oscillator RT_DIS GND DS9259-03T00 August 2007 Pin Name Linear regulator feedback voltage. This pin is the inverting input of the LDO error amplifier and protection monitor ...
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... RT9259 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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... A Min Typ 250 300 -- 1.6 0.792 0.8 0.784 0 12V 0.36 0 -400 0.35 0.4 9.5 10 0.5 -- RT9259 Max Units 350 kHz -- V 0.808 V 0.816 MHz -- V/us Ω 8 Ω 8 Ω 6 Ω www.richtek.com 5 ...
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... RT9259 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) RT9259 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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... LDO controller drives an external N-MOSFET for lower power requirement. Internal 5VDD Regulator It is highly recommended to power the RT9259 with well- decoupled 12V to VCC12 pin. VCC12 powers the RT9259 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 ...
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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 RT9259 PWM controller is shut down when V lower than the UVP threshold. In Figure 5, the RT9259 shuts down after 4 time UVP hiccups triggered by FBL. DS9259-03T00 August 2007 UGATE (20V/Div) ...
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... Time (5μs/Div) Figure 7. Shorted then Start Up (Extended Figure 3) Feedback Compensation The RT9259 is a voltage mode controller. The control loop is a single voltage feedback path including a compensator and modulator as shown Figure 8. The modulator consists of the PWM comparator and power stage. The PWM ...
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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 RT9259 packages, the Figure 11 of derating curves RT9259 is the maximum A is 54°C/W on the JA = 25°C can be ...
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... PCB traces help in minimizing the magnitude of voltage spikes. There are two sets of critical components in a DC-DC converter using the RT9259. The switching power components are most critical because they switch large amounts of energy, and as such, they tend to generate equally large amounts of noise ...
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... Lead SOP Plastic Package RT9259 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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... RT9259 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 RT9259 1 2 DETAIL A Pin #1 ID and Tie Bar Mark Options Dimensions In Inches Min Max 0 ...