Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
V
IN
= +4.5V 150
NMOS Switch On-Resistance R
ON,N
I
LX
= 0.5A
V
IN
= +3V 200
mΩ
Current-Limit Threshold I
LIMIT
2.9 4.3 A
Idle-Mode Current Threshold 0.2 1.0 A
No-Load Supply Current
MAX1843
2.7A, 1MHz, Low-Voltage, Step-Down Regulator with
Internal Synchronous Rectification in QFN Package
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
CC
= +3.3V, FBSEL = GND, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 3)
Note 2: Recommended operating frequency, not production tested.
Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
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