Rainbow Electronics MAX773 - Manual (Page 3)

MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I Q , Step-Up DC-DC Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, I LOAD = 0mA, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETERS SYMBOL CONDITIONS MIN TYP MAX UNITS
REF Load Regulation 0
µ
A
≤
I REF
≤
100
µ
A
MAX77_C/E 4 10
mV
MAX77_M 4 15
REF Line Regulation 3V
≤
V+
≤
16.5V 40 100
µ
V/V
FB Trip-Point Voltage V FB
MAX77_C 1.4700 1.50 1.5300
V MAX77_E 1.4625 1.50 1.5375
MAX77_M 1.4550 1.50 1.5450
FB Input Current I FB
MAX77_C ±20
nA MAX77_E ±40
MAX77_M ±60
SHDN Input High Voltage V IH V+ = 2.0V to 16.5V 1.6 V
SHDN Input Low Voltage V IL
MAX77_C/E, V+ = 2.0V to 16.5V 0.4
V
SHDN Input Current ±1
µ A
LBI Input Current MAX773, V+ = 16.5V, LBI = 1.5V ±20 nA
LBI Hysteresis MAX773 20
LBI Threshold Voltage MAX773, LBI falling
MAX77_C 1.4700 1.50 1.5300
V MAX77_E 1.4625 1.50 1.5375
MAX77_M 1.4550 1.50 1.5450
LBO Leakage Current MAX773, V+ = 16.5V, V LBO = 16.5V 0.01 1.00
µ
A
LBO Output Voltage Low V OL MAX773, V+ = 5V, LBO sinking 1mA 0.1 0.4 V
V+ = 16.5V, SHDN = 0V or V+
mV
Current-Limit Trip Level V CS V+ = 5V to 16.5V 170 200 230 mV
V SHUNT
MAX773, I SHUNT = 1mA to 20mA,
SGND = 0V, C SHUNT = 0.1
µ
F
5.5 6.3 V
CS Input Current 0.01 ±1
µ
A
EXT Rise Time V+ = 5V, 1nF from EXT to ground (Note 3) 55 ns
EXT Fall Time V+ = 5V, 1nF from EXT to ground (Note 3) 55 ns
Supply Voltage in
Shunt Mode
Note 1: Output voltage guaranteed using preset voltages. See Figures 7a–7d for output current capability versus input voltage.
Note 2: Output voltage line and load regulation depend on external circuit components.
Note 3: For the MAX773, EXT is EXTH and EXTL shorted together.
LBI Delay 5mV overdrive 2.5 µs
MAX77_M, V+ = 2.0V to 16.5V 0.2