Rainbow-electronics MAX1718 Manual de usuario descargar pdf (Pagina 4)

MAX1718

Notebook CPU Step-Down Controller for Intel

Mobile Voltage Positioning (IMVP

II)

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 15V, V

= V

= SKP/SDN = 5V, V

OUT

= 1.25V, T

= -40°C to +85°C, unless otherwise noted.) (Note 2)

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V+ = 15V, V

= V

= SKP/SDN = 5V, V

OUT

= 1.25V, T

= 0°C to +85°C, unless otherwise noted.)

-8 +8

-2.0 +2.0

-1.5 +1.5

MIN TYP MAX

-12 +12

230 290

165 215

320 390

465 565

TON = V

(200kHz)

TON = open (300kHz)

TON = REF (550kHz)

V+ = 12V, FB = 1.2V

On-Time (Note 1)

V+ = 5V, FB = 1.2V, TON = GND (1000kHz)

38kHz nominal, R

TIME

= 470kΩ

380kHz nominal, R

TIME

= 47kΩ

150kHz nominal, R

TIME

= 120kΩ

TIME Frequency Accuracy

DAC codes from 0.6V to 0.875V

DAC codes from 0.9V to 1.75V

V+ = 4.5V to 28V,

includes load

regulation error

CONDITIONS

DC Output Voltage Accuracy

PARAMETER UNITS

PWM CONTROLLER

SKP/SDN Float Level

SKP/SDN

= 0µA

1.8 2.2

PARAMETER CONDITIONS MIN TYP MAX UNITS

1.6

DL forced to 2.5VDL Gate-Driver Source Current

D0–D4 Pullup/Pulldown Entering impedance mode

Pullup

Pulldown

kΩ

µA

-1 +1

D0–D4, ZMODE = GND

ZMODE, SUS, OVP

Logic Input Current

4 Level Input Logic Levels

(TON, S0, S1)

For high

For open

For REF

For low

- 0.4

3.15 3.85

1.65 2.35

0.5

µA

-3 +3

SKP/SDN, S0, S1, TON forced to GND or V

SKP/SDN, S0, S1, and TON Input

Current

SKP/SDN Input Levels

SKP/SDN = logic high (SKIP mode)

SKP/SDN = open (PWM mode)

SKP/SDN = logic low (shutdown mode)

To enable no-fault mode

12 15

0.5

1.4 2.2

2.8 6

kΩ

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

ZMODE = V

DAC B-Mode Programming

Resistor, High

kΩ

1.05

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

ZMODE = V

DAC B-Mode Programming

Resistor, Low

0.8

D0–D4, ZMODE, SUS, OVP

Logic Input Low Voltage

2.4

D0–D4, ZMODE, SUS, OVP

Logic Input High Voltage

DH rising

DL rising

Dead Time

LOGIC AND I/O

1 2 3 4 5 6 7 8 9 ... 34 35

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Rainbow-electronics MAX1718 Manual de usuario Pagina 4

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