MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
V+ to GND.............................................................-0.3V to 17V
V+ to SGND.............................................................-0.3V to 7V
SGND........................................................-0.3V to (V+ + 0.3V)
EXT, CS, REF, LBO, LBI, SHDN, FB.............-0.3V to (V+ + 0.3V)
EXTH, EXTL..................................................-0.3V to (V+ + 0.3V)
V5, V12, V15.............................................................-0.3V to 17V
GND to AGND .........................................................0.1V to -0.1V
I
SGND
..................................................................................50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)....727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW
14-Pin Plastic DIP
(derate 10.00mW/°C above +70°C) .............................800mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C)......727mW
Operating Temperature Ranges
MAX77_C__ ........................................................0°C to +70°C
MAX77_E__......................................................-40°C to +85°C
MAX77_MJ_ ...................................................-55°C to +125°C
Junction Temperatures
MAX77_C__/E__ ..........................................................+150°C
MAX77_MJ_..................................................................+175°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = 5V, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Current 85 110
µA
Standby Current
2 5
µA
4
Output Voltage (Note 1)
V+ = 2.0V to 5.0V, over full load range 4.80 5.0 5.20
V
V+ = 2.0V to 12.0V, over full load range 11.52 12.0 12.48
V+ = 2.0V to 15.0V, over full load range 14.40 15.0 15.60
Figure 2a, V+ = 2.7V to 4.5V,
I
LOAD
= 700mA, V
OUT
= 5V
5 mV/V
Figure 2a, V+ = 3V, I
LOAD
= 30mA to 1A,
V
OUT
= 5V
20 mV/A
Maximum Switch On-Time t
ON
(max) 12 16 20
µs
Minimum Switch Off-Time t
OFF
(min) 1.8 2.3 2.8
µs
Efficiency 87 %
Reference Voltage V
REF
I
REF =
0µA
MAX77_C 1.4700 1.5 1.5300
V
MAX77_E 1.4625 1.5 1.5375
MAX77_M 1.4550 1.5 1.5450
Output Voltage Line Regulation
(Note 2)
Output Voltage Load Regulation
(Note 2)
V+ = 4V, I
LOAD
= 500mA, V
OUT
= 5V
V+ = 10.0V, SHDN ≥ 1.6V (shutdown)
V+ = 16.5V, SHDN ≥ 1.6V (shutdown)
V+ = 16.5V, SHDN = 0V (normal operation)
Minimum Start-Up Voltage MAX770/MAX771/MAX772 1.8 2.0 V
MAX770–772 (internal feedback resistors) 2.0 16.5
MAX770–772C/E (external resistors) 3.0 16.5
MAX770–772MJA (external resistors) 3.1 16.5
MAX773C/E 3.0 16.5
MAX773MJD 3.1 16.5
Input Voltage Range V
