ncp5230 ON Semiconductor, ncp5230 Datasheet
ncp5230
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ncp5230 Summary of contents
Page 1
... Precise Low Voltage Synchronous Buck Controller with Power Saving Mode The NCP5230 is a simple single phase solution with differential phase current sensing, power saving operation, and gate drivers to provide accurately regulated power. The adaptive non overlap gate drive and power saving operation circuit provide a low switching loss and high efficiency solution for server, notebook, and desktop systems ...
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... Connects with the silicon substrate for good thermal contact with the PCB. Connect to GND plane. 15 Over Current Detector UVP − Control Logic, + Protection, VREF*75% Generator and PWM Logic + OVP VREF*125% − OVP, UNLATCHED − + VREF*50% Figure 1. NCP5230 BLOCK DIAGRAM Description http://onsemi.com 2 6 2.2 W BOOT OSC RAMP UVLO Control VCCP GND ...
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... Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. *All signals referenced to GND unless noted otherwise. VCC 6 RS3 PGOOD VCCP 7 SYNC CSEN1 BOOT RS4 13 CSP NCP5230 12 CSN/ FBG COMP RF1 CH1 LG RVFB1 ...
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THERMAL INFORMATION Rating Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case Operating Junction Temperature Range Operating Ambient Temperature Range Maximum Storage Temperature Range Moisture Sensitivity Level QFN Package ELECTRICAL CHARACTERISTICS Parameter SUPPLY OPERATING CONDITIONS VCC Voltage Range VCCP Voltage Range dV/dt on ...
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ELECTRICAL CHARACTERISTICS Parameter OSCILLATOR (with no ROSC Resistor Defaults to 200 kHz) Switching Frequency Accuracy OSC Gain (Note 1) Disable threshold MODULATORS (PWM Comparators) Minimum Pulse Width Minimum Turn Off Time (LG on) Magnitude of the PWM Ramp Maximum Duty ...
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ELECTRICAL CHARACTERISTICS Parameter HIGH SIDE DRIVER UG R Output Resistance, Sourcing H_TG R Output Resistance, Sinking H_TG Tr Transition Time DRVH Tf Transition Time DRVH Tpdh Propagation Delay (Notes 1, 2) DRVH UG Internal Resistor to LX LOW SIDE DRIVER ...
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... UG and LG pins will be pulled low. Toggling VCC power or EN will reset the undervoltage protection. PreOVP Protection If the NCP5230 is powered on but not enabled, the VSEN pin will be monitored for preOVP condition. If the VSEN exceeds the preset threshold, the device will force LG pin high to protect the load ...
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... IC to startup without Vin or with insufficient Vin voltage. Overcurrent Protection NCP5230 measures the differential current sensing signal through CSP and CSN/VO pin. There are two current protection levels: OCP1 and OCP2. If the differential voltage across pin CSP and CSN/VO is over 20 mV (but below 30 mV) for four consecutive cycles, OCP1 will be tripped ...
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... Light Load Operation In the light load condition, NCP5230 will work in a diode emulation mode with bottom gate turning off if the inductor current is below zero. The system therefore works in discontinuous conduction mode (DCM). The zero current detection is done by sensing switch node and automatically ...
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Vin POR_VCC UVLO_VCC VCC 1.24V 0.75V OSC/EN LG (Stays Low until first PWM pulse except in case of a Fault 0.8 V ref 80% V rer Vout monitor SoftStart 1024cycle ~5ms@200kHzz Pre-OVP valid Figure 7. ...
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Yes No UV (after Vout reaches UV threshold in softstart ) UVP OVP TG OFF OFF OFF PGOOD =0 PGOOD=0 No Vout < Vth_disoff Yes OVP PWR ON EN>Vdis_th No VCC> POR & VCCDR > UVLO ...
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... PAD AS WELL AS THE TERMINALS. MILLIMETERS DIM MIN NOM MAX A 0.80 0.90 1. 0.00 0.03 0.05 A3 0.20 REF b 0.18 0.24 0.30 D 3.00 BSC D2 1.65 1.75 1.85 E 3.00 BSC E2 1.65 1.75 1.85 e 0.50 BSC K 0.18 TYP L 0.30 0.40 0.50 L1 0.00 0.08 0.15 RECOMMENDED 16X 0. 1.84 3.30 0.50 PITCH DIMENSIONS: MILLIMETERS ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP5230/D ...