ADP3051 データシートの表示（PDF） - Analog Devices

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ADP3051

500 mA PWM Step-Down DC-DC with Synchronous Rectifier

Analog Devices 

ADP3051

CH1 = VIN, CH2 = SW, CH3 = VOUT, CH4 = IL (1A/DIV)

VIN = 3.6V, VOUT = 1.2V, ILOAD = 500mA

Figure 9. Start-Up Behavior

CH1 = COMP, CH3 = VOUT, CH4 = ILOAD (50mA TO 490mA)

VIN = 3.6V, VOUT = 2.5V, COUT = 22µF, CC = 150pF, RC = 100kΩ

Figure 12. Load Transient Response

CH2 = IL (100mA/DIV), CH4 = SW

VIN = 3.6V, VOUT = 2.5V, L = 22µH, IOUT = 50mA

Figure 10. Light Load Switching Waveforms

CH2 = IL (500mA/DIV), CH4 = SW

VIN = 3.6V, VOUT = 2.5V, L = 22µH, IOUT = 500mA

Figure 11. Heavy Load Switching Waveforms

CH1 = VIN, CH2 = VOUT

VIN = 3V TO 4V, VOUT = 2.5V, ILOAD = 500mA

Figure 13. Line Transient Response

210

200

190

PMOS

180

170

160

VOUT = 2.5V

IOUT = 500mA

150

140

NMOS

130

120

110

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

SUPPLY VOLTAGE (V)

Figure 14. Switch On Resistance vs. Input Voltage

Rev. 0 | Page 7 of 16

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