5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
MAX770–MAX773
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
MAX770–772 (internal feedback resistors)
MAX770–772C/E (external resistors)
Input Voltage Range
MAX770–772MJA (external resistors)
MAX773C/E
MAX773MJD
Minimum Start-Up Voltage
Supply Current
Standby Current
MAX770/MAX771/MAX772
V+ = 16.5V, SHDN = 0V (normal operation)
V+ = 10.0V, SHDN
≥
1.6V (shutdown)
V+ = 16.5V, SHDN
≥
1.6V (shutdown)
V+ = 2.0V to 5.0V, over full load range
Output Voltage (Note 1)
V+ = 2.0V to 12.0V, over full load range
V+ = 2.0V to 15.0V, over full load range
Output Voltage Line Regulation
(Note 2)
Output Voltage Load Regulation
(Note 2)
Maximum Switch On-Time
Minimum Switch Off-Time
Efficiency
Reference Voltage
V
REF
t
ON
(max)
t
OFF
(min)
V+ = 4V, I
LOAD
= 500mA, V
OUT
= 5V
MAX77_C
I
REF =
0µA
MAX77_E
MAX77_M
1.4700
1.4625
1.4550
Figure 2a, V+ = 2.7V to 4.5V,
I
LOAD
= 700mA, V
OUT
= 5V
Figure 2a, V+ = 3V, I
LOAD
= 30mA to 1A,
V
OUT
= 5V
12
1.8
4.80
11.52
14.40
MIN
2.0
3.0
3.1
3.0
3.1
1.8
85
2
4
5.0
12.0
15.0
5
5.20
12.48
15.60
mV/V
V
TYP
MAX
16.5
16.5
16.5
16.5
16.5
2.0
110
5
V
µA
µA
V
UNITS
20
16
2.3
87
1.5
1.5
1.5
1.5300
1.5375
1.5450
20
2.8
mV/A
µs
µs
%
V
2
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
