Datasheet

MAX8650
4.5V to 28V Input Current-Mode Step-Down
Controller with Adjustable Frequency
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, V
BST
- V
LX
= 6.5V, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
POK
REFIN = AVL, V
FB
rising, typical hysteresis is 3% 629.0 650.0 671.0 mV
Power-OK Threshold
V
REFIN
= 0.7V to 1.5V, V
FB
rising, typical hysteresis is 3% 88.7 91.7 94.7
% of
POK Output Voltage, Low V
FB
= 0.6V, I
POK
= 2mA 25 200 mV
POK Leakage Current, High V
POK
= 5.5V 1 µA
OVP
REFIN = AVL 770 800 840 mV
OVP Threshold Voltage
V
REFIN
= 0.7V to 1.5V 110 115 120
% of
V
REFIN
OVP Leakage Current, High V
OVP
= 0.8V 500 nA
MODE CONTROL
MODE Logic-Level Low 4.5V ≤ V
AVL
≤ 5.5V 0.4 V
MODE Logic-Level High 4.5V ≤ V
AVL
≤ 5.5V 1.8 V
MODE Input Current V
MODE
= 0 to V
AVL
-1 +1 µA
SHUTDOWN CONTROL
EN Logic-Level Low 4.5V ≤ V
AVL
≤ 5.5V 0.45 V
EN Logic-Level High 4.5V ≤ V
AVL
≤ 5.5V 2 V
V
EN
= 0V -1 +1
EN Input Current
V
EN
= 28V 1.5 6.0
µA
Note 1: Specifications are 100% production tested at T
A
= +85°C. Limits over the operating temperature range are guaranteed
by design.