CS5323 ON Semiconductor, CS5323 Datasheet
CS5323
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CS5323 Summary of contents
Page 1
... The CS5323 is a three–phase step down controller that incorporates all control functions required to power next generation processors. Proprietary multi–phase architecture guarantees balanced load current distribution and reduces overall solution cost in high current 2 applications. Enhanced V control architecture provides the fastest possible transient response, excellent overall regulation, and ease of use ...
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... F C11 2.0 nF C28 R9 1 1.0 k 7.5 k R13 10 k C23 C24 C22 .01 F .01 F .01 F C21 .01 F R17 30.1 k R16 R15 30.1 k 30.1 k Figure 1. Application Diagram 1.7 V Converter CS5323 D1 C5 BAS40LT1 1 C17 R12 . OSC GATE1 COMP GATE2 C19 V FB BAS40LT1 1.0 F ...
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... MAXIMUM RATINGS Pin Number Pin Symbol COMP 5–7 CS1–CS3 REF 11–15 VID0–4 16 17–19 GATE 1–3 20 CS5323 Rating Reflow: (SMD styles only) (Note MAX MIN 6.0 V –0.3 V OSC 6.0 V –0 6.0 V –0 6.0 V –0.3 V DRP 6.0 V –0.3 V 6.0 V –0.3 V ...
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... Input Threshold Input Pull–up Resistance Pull–up Voltage CS5323 (0 C < T < < T < 4.7 V < 0.1 F, DAC Code 10000 0 VCC Test Conditions ; 1 = Open or Pull– Measure V = COMP FB – – – – – – – – – – – – ...
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... Measure V Maximum V Voltage |(CS1 = CS2 = CS3) – C DRP V Current Share Amp to V Gain DRP 2. The V Bias Current changes with the value Guaranteed by design. Not tested in production. CS5323 (0 C < T < < T < 4.7 V < 0 VCC Test Conditions < 1 1.8 V; DAC = 00000 FB = 1.9 V; DAC = 00000 FB – ...
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... Start Threshold GATEs switching, COMP charging CC V Stop Threshold GATEs stop switching, COMP discharging CC V Hysteresis GATEs not switching, COMP not charging CC 4. Guaranteed by design. Not tested in production. CS5323 (0 C < T < < T < 4.7 V < 0 VCC Test Conditions ) = 0 V REF – ...
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... CS1–CS3 11–15 VID0–VID4 16 17–19 20 CS5323 PACKAGE PIN DESCRIPTION R A resistor from this pin to ground sets operating frequency OSC and V bias current. FB COMP Output of the error amplifier and input for the PWM comparators. V Voltage Feedback Pin. To use Adaptive Positioning, set the ...
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... REF Gnd V DRP TYPICAL PERFORMANCE CHARACTERISTICS 900 800 700 600 500 400 300 200 100 Value, k OSC Figure 3. Oscillator Frequency CS5323 V CC PWMC1 CO1 MAXC1 FAULT CO1 0.44 V OVIC PWMC2 CO2 MAXC2 FAULT CO2 0.44 V PWMC3 CO3 MAXC3 FAULT FAULT CO3 ...
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... The CS5323 uses a three–phase, fixed frequency, 2 enhanced V architecture. Each phase is delayed 120 from the previous phase. Normally the GATE transitions high at the beginning of each oscillator cycle ...
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... Copper magnet wire has a temperature coefficient of 0.39% per C. The increase in winding resistance at higher temperatures should be CS5323 considered when setting the I accurate current sense is required than inductive sensing can provide, current can be sensed through a resistor as shown in Figure 5 ...
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... With this compensation the I threshold must be set more than 50% above the full load current to avoid triggering hiccup mode during a large output load step. CS5323 or greater is typically than optimum might L Figure 9. Inductive Sensing waveform during a Step ...
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... Normal Fast Adaptive Positioning Slow Adaptive Positioning Limits Figure 10. Adaptive Positioning The CS5323 uses two methods to provide fast and accurate adaptive positioning. For low frequency positioning the V and V pins are used to adjust the FB DRP output voltage with varying load currents. For high frequency positioning, the current sense input pins can be used to control the power stage output impedance ...
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... CS5323 controller. The slots should typically not be placed between the controller and the output voltage or in the return path of the gate drive ...
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... I OUT(LIM LIM Gain where CS5323 I OUT(LIM) For the overcurrent to work properly the inductor time constant (L/R) should be the Current sense RC. If the will too fast, during step loads the current waveform L will appear larger than it is (typically for a few hundred ...
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... A. Current Sensing, Power Stage and Output Filter Components 1. Assume 1 output filter ESR OUT ) 2. (V OUT V IN (12 * 1.5) (1.5 12) (250 å Choose . 200 ms Choose 2 200 ms + 400 nH CS5323 3. n/a PwrstgZ + 1.5 mW ConverterZ + DVR + 1 n Current Limit V I(LIM 1.5 mW Adaptive Positioning R V(FB Position V FB Bias Current 7 ...
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... Typical JAPAN: ON Semiconductor, Japan Customer Focus Center 2–9–1 Kamimeguro, Meguro–ku, Tokyo, Japan 153–0051 Phone: 81–3–5773–3850 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com Unit 17 C/W 90 C/W CS5323/D ...