Datasheet

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
DH
= 400pF, 90% point to 90% point; see drawing below for
measurement details).
ELECTRICAL CHARACTERISTICS (continued)
(V
VP
= 15V, VL enabled, C
VL
= 1µF, C
REF
= 0.1µF,
T
A
= -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
V
IH
1.6 V
SHDN Logic Input Low
Threshold Voltage
V
IL
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
DH
90% 90%
t
ON