Rainbow-electronics MAX1717 Manual de usuario descargar pdf (Pagina 5)

MAX1717

Dynamically Adjustable, Synchronous

Step-Down Controller for Notebook CPUs

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

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

= V

= SKP/SDN = +5V, V

OUT

=1.6V, T

= -40°C to +85°C, unless otherwise noted.) (Note 3)

VGATE Lower Trip Threshold

-8.4 -4.6

VGATE Upper Trip Threshold

+10 +15

Measured at FB with respect to unloaded output voltage,

falling edge, hysteresis = 1%

Measured at FB with respect to unloaded output voltage,

rising edge, hysteresis = 1%

ILIM = REF (2V)

ILIM = 0.5V

DAC B-Mode Programming

Resistor, Low

kΩ

DAC B-Mode Programming

Resistor, High

100

kΩ

Output Undervoltage Protection

Threshold

65 75

Current-Limit Threshold

(Positive, Default)

80 115

Current-Limit Threshold

(Positive, Adjustable)

33 65

160 240

Overvoltage Trip Threshold

2.20 2.30

Current-Limit Threshold

(Negative)

-140 -80

Undervoltage Lockout

Threshold

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

A/B = GND

4.1 4.4

DH Gate Driver On-Resistance

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

A/B = GND

3.5

Ω

DL Gate Driver On-Resistance

3.5

Ω

1.0

Ω

Logic Input High Voltage

2.4

Logic Input Low Voltage

0.8

LX - GND, ILIM = V

With respect to unloaded output voltage

GND - LX, ILIM = V

Rising edge, hysteresis = 20mV, PWM disabled below this

level

BST - LX forced to 5V

GND - LX

DL, high state (pullup)

DL, low state (pulldown)

Measured at FB

D0–D4, A/B

PARAMETER MIN TYP MAX UNITS

Quiescent Supply Current (V

)

1200

µA

Shutdown Battery Supply

Current (V+)

µA

Reference Voltage

1.98 2.02

CONDITIONS

Measured at V

, FB forced above the regulation point

SKP/SDN = 0, V

= V

= 0 or 5V

= 4.5V to 5.5V, no REF load

Note 1: Output voltage accuracy specifications apply to DAC voltages from 0.925V to 2V. Includes load-regulation error.

Note 2: On-Time specifications are measured from 50% to 50% at the DH pin, with LX forced to 0, BST forced to 5V, and a 500pF

capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be different due to

MOSFET switching speeds.

Note 3: Specifications to -40°C are guaranteed by design and not production tested.

Shutdown Supply Current (V

)

µA

Shutdown Supply Current (V

)

µA

SKP/SDN = 0

Quiescent Battery Supply

Current (V+)

µA

Quiescent Supply Current (V

)

µAMeasured at V

, FB forced above the regulation point

1 2 3 4 5 6 7 8 9 10 ... 32 33

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics MAX1717 Manual de usuario Pagina 5

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics MAX1717