Rainbow Electronics MAX652 - Manual (Page 3)

MAX649/MAX651/MAX652
5V/3.3V/3V or Adjustable, High-Efficiency,
Low I Q , Step-Down DC-DC Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL MIN TYP MAX
-45
UNITS
V+ = 16.5V, SHDN = 0V or V+
-45
SHDN Input Current 1 µA
Output Voltage
Load Regulation
-47
mV/A
CONDITIONS
Circuit of
Figure 1
MAX649, 0 ≤ I LOAD
≤ 1.5A,
V IN = 10V
MAX651, 0 ≤ I LOAD
≤ 1.5A,
V IN = 5V
MAX652, 0 ≤ I LOAD
≤ 1.5A,
V IN = 5V
MAX649, V+ = 10V,
I
LOAD = 1A
MAX651, V+ = 5V,
I
LOAD = 1A
89
MAX652, V+ = 5V,
I
LOAD = 1A
88
Efficiency
92
%
Circuit of
Figure 1
4V ≤ V+ ≤ 16.5V SHDN Input Voltage High 1.6 V V IH
4V ≤ V+ ≤ 16.5V 0.4 V V IL SHDN Input Voltage Low
4V ≤ V+ ≤ 16.5V CS Input Current ±1 µA
V+ = 12V 12 16 20 µs
t ON
(max)
Switch Maximum
On-Time
C EXT = 0.001µF, V+ = 12V EXT Rise Time 50 ns
C EXT = 0.001µF, V+ = 12V EXT Fall Time 50 ns
V+ = 12V
Switch Minimum
Off-Time
1.8 2.3 2.8 µs
t OFF
(min)
MAX649C/E, MAX65_C/E Current-Limit Trip
Level (V+ to CS) 180 210 240
mV V CS
MAX649M, MAX65_M 160 210 260
4V ≤ V+ ≤ 16.5V