Rainbow-electronics MAX1791 Manual do Utilizador descarregar pdf (Página 5)

MAX1762/MAX1791

High-Efficiency, 10-Pin µMAX, Step-Down

Controllers for Notebooks

_______________________________________________________________________________________ 5

Note 1: Specifications to -40°C are guaranteed by design, not production tested.

Note 2: One-shot times are measured at the DH pin (VP = 15V, C

= 400pF, 90% point to 90% point; see drawing below for

measurement details).

ELECTRICAL CHARACTERISTICS (continued)

= 15V, VL enabled, C

= 1µF, C

REF

= 0.1µF, T

= -40 to +85°C, unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

VL Undervoltage Lockout

Threshold

Rising edge, hysteresis = 20mV, PWM

disabled below this level

4.1 4.4 V

SHDN Logic Input High

Threshold Voltage

1.6 V

SHDN Logic Input Low

Threshold Voltage

0.6 V

MAX1762 V

OUT

= 1.8V fixed

MAX1791 V

OUT

= 3.3V fixed

50 150 mV

MAX1762 V

OUT

= 2.5V fixed

Dual Mode Threshold Voltage

MAX1791 V

OUT

= 5V fixed

2.5 4 V

90% 90%

1 2 3 4 5 6 7 8 9 10 ... 19 20

Sem comentários

Rainbow-electronics MAX1791 Manual do Utilizador Página 5