MAX1714(1999) Просмотр технического описания (PDF) - Maxim Integrated

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MAX1714
(Rev.:1999)

High-Speed Step-Down Controller for Notebook Computers

Maxim Integrated 

High-Speed Step-Down Controller

for Notebook Computers

_____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 1, components from Table 1, VIN = +15V, SKIP = AGND, TON = unconnected, TA = +25°C, unless otherwise noted.)

LOAD-TRANSIENT RESPONSE

(4A COMPONENTS, VOUT = 2.5V, 300kHz)

LOAD-TRANSIENT RESPONSE

(8A COMPONENTS, VOUT = 1.6V, 300kHz)

LOAD-TRANSIENT RESPONSE

(1.5A COMPONENTS, VIN = 5V,

VOUT = 2.5V, 600kHz)

A

A

A

B

C

10µs/div

A = VOUT, AC-COUPLED, 100mV/div

B = INDUCTOR CURRENT, 2A/div

C = DL, 10V/div

B

C

10µs/div

A = VOUT, AC-COUPLED, 100mV/div

B = INDUCTOR CURRENT, 5A/div

C = DL, 5V/div

START-UP WAVEFORM

(4A COMPONENTS, IOUT = 4A, ACTIVE LOAD,

VOUT = 2.5V, 300kHz)

A

B

OUTPUT OVERLOAD WAVEFORM

(4A COMPONENTS, VOUT = 2.5V, 300kHz)

OUTPUT

UNDERVOLTAGE

A

PROTECTION

THRESHOLD

B

C

500µs/div

A = VOUT, 1V/div

B = INDUCTOR CURRENT, 5A/div

C = DL, 5V/div

C

200µs/div

A = VOUT, 1V/div

B = INDUCTOR CURRENT, 5A/div

C = DL, 5V/div

B

C

5µs/div

A = VOUT, AC-COUPLED, 100mV/div

B = INDUCTOR CURRENT, 1A/div

C = DL, 5V/div

SHUTDOWN WAVEFORM

(4A COMPONENTS, VOUT = 2.5V, 300kHz)

A

B

C

50µs/div

A = VOUT, 1V/div

B = INDUCTOR CURRENT, 5A/div

C = DL, 5V/div

_______________________________________________________________________________________ 7

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