Rainbow Electronics MAX776 - Manual (Page 3)

MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I
Q
Inverting DC-DC Controllers
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ELECTRICAL CHARACTERISTICS (continued)
PARAMETER
EXT Rise Time
SYMBOL MIN TYP MAX
160 210 260
UNITS
50
CS Input Current ±1
µ A
Switch Maximum On-Time t ON (max) 12 16 20
µ s
Switch Minimum Off-Time t OFF (max) 1.8 2.3 2.8
3V ≤ V+ ≤ 16.5V
ns
88
µ
s
EXT Fall Time
MAX77_M
V+ = 12V
V+ = 12V
50 ns
C EXT = 1nF, V+ = 12V
C EXT = 1nF, V+ = 12V
87
Efficiency
(Circuit of Figure 2—
Bootstrapped) 82
%
SHDN Input Current ±1
µ
A
SHDN Input Voltage High V IH 1.6 V
SHDN Input Voltage Low V IL 0.4 V
Current-Limit Trip Level
(V+ – CS)
V CS
180 210 240
mV
CONDITIONS
MAX775, V+ = 5V, I LOAD = 500mA
MAX776, V+ = 5V, I LOAD = 400mA
MAX774, V+ = 5V, I LOAD = 1A
V+ = 16.5V, SHDN = 0V or V+
3V ≤ V+ ≤ 16.5V
3V ≤ V+ ≤ 16.5V
MAX77_C/E