Datasheet

MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable, High-Efficiency,
Low I
Q
Inverting DC-to-DC Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, I
LOAD
= 0mA, C
REF
= 0.1µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
3V ≤ V+ ≤ 16.5V
V+ = 16.5V, SHDN = 0V or V+
MAX774, V+ = 5V, I
LOAD
= 1A
MAX776, V+ = 5V, I
LOAD
= 400mA
MAX775, V+ = 5V, I
LOAD
= 500mA
CONDITIONS
V1.6 V
IH
SHDN Input Voltage High
µA±1SHDN Input Current
%
82
Efficiency
(Circuit of Figure 2—
Bootstrapped)
87
C
EXT
= 1nF, V+ = 12V
C
EXT
= 1nF, V+ = 12V
ns50
V+ = 12V
V+ = 12V
EXT Fall Time
µs
88
ns
1.8 2.3 2.8t
OFF
(max)Switch Minimum Off-Time
µs12 16 20 t
ON
(max)Switch Maximum On-Time
µA±1CS Input Current
50
UNITS
MIN TYP MAX
SYMBOL
EXT Rise Time
PARAMETER
160 210 260
3V ≤ V+ ≤ 16.5V
mV
180 210 240
V
CS
Current-Limit Trip Level
(V+ – CS)
0.3
3V ≤ V+ ≤ 16.5V
V
0.4
V
IL
SHDN Input Voltage Low
MAX77_M
MAX77_C/E
MAX77_M
MAX77_C/E