ncp5252 ON Semiconductor, ncp5252 Datasheet
ncp5252
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ncp5252 Summary of contents
Page 1
... V supply and can output a voltage down to 0.6 V. The switching frequency is adjustable from 333 kHz up to 1.0 MHz and has the ability to provide skip mode for light load efficiency. NCP5252 protection features include Under Voltage Lock Out (UVLO), Over Voltage Protection (OVP), Cycle-by-Cycle Current Protection (OCP) and Thermal Shutdown ...
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... Control SKIP NCP5252 PGH + − PGL + Control Logic, Protection, − RAMP UVP + Generator and PWM Logic − OVP + − OSC / DIV AGND Figure 1. NCP5252 Typical Block Diagram http://onsemi.com 2 LDO VCC UVLO Control OC monitor BST LX VO Soft stop OC monitor VCC PGND ...
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... COMP FB VO AGND Figure 2. NCP5252 Typical Application Circuits PIN FUNCTION DESCRIPTION Pin No Symbol 1 V Internal LDO power supply CC 2 BST Top MOSFET driver input supply, a bootstrap capacitor connection between LX and this pin. 3 PGOOD Power good indicator of the output voltage. High impedance (open drain) if power good (in regulation). ...
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ABSOLUTE MAXIMUM RATINGS Rating V Power Supply Voltage to AGND SKIP to AGND Bootstrap Supply Voltage: BST to LX LDO regulator AGND Input / Output Pins to AGND Switch Node to PGND PGND Thermal Resistance ...
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ELECTRICAL CHARACTERISTICS (V Characteristics Symbol SUPPLY VOLTAGE Input Voltage POR Threshold for Internal Reset V Logic SUPPLY CURRENT V Quiescent Supply Current I CC CC_FPWM V Shutdown Current I CC VCC_SD BST Quiescent Supply Current I BST_FPWM BST Shut Down ...
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ELECTRICAL CHARACTERISTICS (V Characteristics Symbol SWITCHING MODULATOR Minimum Minimum T T off PWM Comparator Offset Propagation Delay of PWM TD_PWM Comparator VOLTAGE ERROR AMPLIFIER DC Gain GAIN_VEA Open−Loop Phase Margin PH_EA Unity Gain Bandwidth BW_VEA Slew Rate ...
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TYPICAL OPERATING CHARACTERISTICS 175 150 125 100 −50 − AMBIENT TEMPERATURE (°C) A Figure 3. Sync FET ON Resistance vs. Temperature 1075 1050 1025 1000 975 950 925 −50 − ...
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TYPICAL OPERATING CHARACTERISTICS 0.75 0.50 0.25 0.00 −0.25 −0.50 −0.75 0.01 0 OUTPUT CURRENT (A) OUT Figure 9. Output Voltage Change vs. Output Current 0.75 0.50 0.25 0.00 −0.25 −0.50 −0.75 0.01 0 OUTPUT CURRENT (A) ...
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mA, LOAD mH,C = 100 mF) OUT Upper trace: Input voltage, 5 V/div Lower trace: Output voltage, 1 V/div Time base: 500 ms/div Figure 15. Soft−Start Waveforms for V (Vin ...
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200 mA mH LOAD OUT Upper trace: Output ripple voltage, 50 mV/div Middle trace: Lx pin switching waveform, 5 V/div Lower trace: Inductor current waveforms, 1 A/div Time base: ...
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mH 100 mF, Freq = 500 kHz) in OUT Upper trace: Output dynamic voltage, 100 mV/div Lower trace: Output current, 1 A/div Time base : 50 ms/div Figure 21. Load Transient ...
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... General The NCP5252 is a PWM regulator intended for DC−DC conversion from 5 V & buses and supplies load. The NCP5252 is a step down synchronous−rectifier buck topology regulator with integrated high−side and a low−side NMOS switch. The output voltage of the converter can be precisely regulated down to 600 mV ± ...
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... The IC will shutdown if the die temperature exceeds 150°C. The IC will restart with soft−start operation only voltage is after the junction temperature drops below 125° NCP5252 PGND Figure 26. Typical Application Circuit http://onsemi.com 13 voltage is higher than 4.0 V, the UVLO flag 4 ...
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Table 1. Typical Design Value For Vcc = 12 V Application Vin Vout Fsw C1 C2 (V) (V) (kHz) (nF) (pF Any 10 2.0 12 3.3 Any 10 2.0 12 1.2 Any 10 2 Any 10 ...
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Timing 1 (SMPS Enable and Disable by EN_SKIP) VIN EN_SKIP V5 SMPS VOUT PGOOD Logic Block Ready when VCC > PORth Device Ready when VCC > VINth Timing 2 (SMPS OVP & UVP Operation) VCC 115% 110% SMPS VOUT TG ...
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... PAD AS WELL AS THE TERMINALS. MILLIMETERS DIM MIN MAX A 0.80 1. 0.00 0.05 A3 0.20 REF b 0.18 0.30 D 3.00 BSC D2 1.65 1.85 E 3.00 BSC E2 1.65 1.85 e 0.50 BSC K 0.18 TYP L 0.30 0.50 L1 0.00 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 NCP5252/D ...