High-Efficiency, PWM, Step-Down,

N-Channel DC-DC Controller

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5

A: LOAD CURRENT, 0.1A TO 1.5A, 1A/div

V+ = 10V

LOAD-TRANSIENT RESPONSE

A

B

200

µs/div

A: EXT VOLTAGE, 10V/div

B: INDUCTOR CURRENT, 500mA/div

A

B

MODERATE-LOAD, IDLE-MODE

WAVEFORMS

20

µs/div

C

A: LOAD CURRENT, 0.1A TO 1.5A, 1A/div

V+ = 10V

LOAD-TRANSIENT RESPONSE

A

B

1ms/div

A : EXT VOLTAGE, 20V/div

B : INDUCTOR CURRENT 1A/div

CONTINUOUS-CONDUCTION MODE

WAVEFORMS

A

B

C

5

µs/div

0V

8V

A: V+ = 8V TO 10V, 2V/div

LINE-TRANSIENT RESPONSE

A

B

10V

500ms/div

A: EXT VOLTAGE, 10V/div

B: INDUCTOR CURRENT, 500mA/div

DISCONTINUOUS-CONDUCTION

IDLE-MODE WAVEFORMS

A

B

20

µs/div

C

____________________________Typical Operating Characteristics (continued)