NCP3155BDR2G datasheet(7/25 Pages) ONSEMI

Part #	NCP3155BDR2G

Description	3 A Synchronous Buck Regulator

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Manufacturer	ONSEMI [ON Semiconductor]

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NCP3155A, NCP3155B

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TYPICAL PERFORMANCE CHARACTERISTICS

400

500

600

700

800

900

1000

1100

1200

−40 −25 −10

5

203550

658095 110 125

TEMPERATURE (°C)

Figure 15. Output Protection vs Temperature

Output Overvoltage Threshold

Output Undervoltage Threshold

400

450

500

550

600

650

700

750

800

850

900

950

1000

−40 −25 −10 5

20

355065

8095 110 125

TEMPERATURE (°C)

Figure 16. Ramp Valley Voltage vs Temperature

10

11

12

13

14

15

16

17

−40 −25 −10 5

20

35

50

65

80

95 110 125

TEMPERATURE (°C)

Figure 17. ISET Current vs Temperature

Input = 12 V, Output = 1.8 V, Load = 2 A,

CH3 (Purple) = VIN, (CH2) Green = VOUT, CH1 (Yellow) = VSW

CH3: 10 V/div; CH2: 2.0 V/div; CH1: 5.0 V/div

Time Scale: 1.0 ms/div; Figure 45

Figure 18. Startup Waveforms (NCP3155A)

Input = 12 V, Output = 1.8 V, Load = 2 A,

CH3 (Purple) = VIN, (CH2) Green = VOUT, CH1 (Yellow) = VSW

CH3: 10 V/div; CH2: 1.0 V/div; CH1: 5.0 V/div

Time Scale: 0.5 ms/div; Figure 46

Figure 19. Startup Waveforms (NCP3155B)

Input = 12 V

(CH2) Green = VOUT, CH1 (Yellow) = VSW

CH2: 0.5 V/div; CH1: 5.0 V/div

Time Scale: 2.0 ms/div; Figure 45

Figure 20. Current Limit Waveforms (NCP3155A)

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NCP3155BDR2G Datasheet(PDF) 7 Page - ON Semiconductor

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