MAX1717 查看數據表（PDF） - Maxim Integrated

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MAX1717

Dynamically Adjustable, Synchronous Step-Down Controller for Notebook CPUs

Maxim Integrated 

Dynamically Adjustable, Synchronous

Step-Down Controller for Notebook CPUs

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = +15V, VCC = VDD = SKP/SDN = +5V, VOUT = 1.6V, TA = 0°C to +85°C, unless otherwise noted.)

PARAMETER

CONDITIONS

MIN TYP MAX

DL Gate-Driver Source Current DL forced to 2.5V

1.3

DL rising

35

Dead Time

DH rising

26

LOGIC AND I/O

Logic Input High Voltage

D0–D4, A/B

2.4

Logic Input Low Voltage

D0–D4, A/B

0.8

DAC B-Mode Programming

Resistor, Low

D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,

A/B = GND

1.05

DAC B-Mode Programming

Resistor, High

D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,

A/B = GND

95

D0–D4 Pullup/Pulldown

Logic Input Current

TON Input Levels

SKP/SDN and TON Input Current

SKP/SDN Input Levels

Entering B mode

D0–D4, A/B = 5V

A/B

Pull up

Pull down

For TON = VCC (200kHz operation)

For TON = open (300kHz operation)

For TON = REF (550kHz operation)

For TON = GND (1000kHz operation)

SKP/SDN, TON forced to GND or VCC

SKP/SDN = logic high (SKIP mode)

SKP/SDN = open (PWM mode)

SKP/SDN = logic low (shutdown mode)

To enable no-fault mode

40

8

-1

1

-1

1

VCC - 0.4

3.15

3.85

1.65

2.35

0.5

-3

3

2.8

6

1.8

2.2

0.5

12

15

UNITS

A

ns

kΩ

kΩ

µA

V

µA

V

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = +15V, VCC = VDD = SKP/SDN = +5V, VOUT = 1.6V, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

DC Output Voltage Accuracy

(Note 1)

V+ = 4.5V to 28V, DAC codes from 1.3V to 2V

-1.5

includes load

regulation error

DAC codes from 0.925V to 1.275V -1.7

1.5

%

1.7

TIME Frequency Accuracy

On-Time (Note 2)

On-Time (Note 2)

Minimum Off-Time (Note 2)

Minimum Off-Time (Note 2)

150kHz nominal, RTIME = 120kΩ

-8

380kHz nominal, RTIME = 47kΩ

-12

38kHz nominal, RTIME = 470kΩ

-12

V+ = 5V, FB = 2V, TON = GND (1000kHz)

375

TON = REF (550kHz)

136

V+ = 24V, FB = 2V

TON = open (300kHz)

260

TON = VCC (200kHz)

365

TON = VCC, open, or REF (200kHz, 300kHz, or 550kHz)

TON = GND (1000kHz)

+8

+12

%

+12

475

ns

173

318

ns

471

500

ns

375

ns

4 _______________________________________________________________________________________

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