Datasheet

MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= 5V, SHDN = V
CC
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
V
CC
to GND............................................................-0.3V to +12V
PGND to GND .......................................................-0.1V to +0.1V
FB to GND (MAX5025/MAX5026)...............-0.3V to (V
CC
+ 0.3V)
FB to GND (MAX5027/MAX5028)...........................-0.3V to +40V
SHDN to GND.............................................-0.3V to (V
CC
+ 0.3V)
LX to GND ..............................................................-0.3V to +45V
Peak LX Current ................................................................600mA
Operating Temperature Range ...........................-40°C to +85°C
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........695.7mW
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +165°C
Lead Temperature (soldering 10s) ..................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
SUPPLY VOLTAGE
MAX5026/MAX5028 3.0 11
Input Voltage Range V
CC
MAX5025/MAX5027 4.5 11
V
Undervoltage Lockout
V
UVLO
Rise/fall, hysteresis = 3mV
2.25 2.65 2.95
V
Supply Current I
CC
MAX5025/MAX5026, FB = 1.4V
MAX5027/MAX5028, FB = 35V
350 1000
µA
Shutdown Current I
SHDN
SHDN = GND
0.01
1µA
BOOST CONVERTER
MAX5025/MAX5027
345 500 1000
Switching Frequency f
SW
MAX5026/MAX5028, V
CC
= 3.3V
410 500
670
kHz
MAX5025/MAX5027,
I
LOAD
= 2mA, V
CC
= 4.5V to 11V,
V
OUT
= 30V
0.25
Line Regulation
MAX5026/MAX5028,
I
LOAD
= 0.5mA, V
CC
= 3V to 11V,
V
OUT
= 30V
0.25
%/V
MAX5025/MAX5027,
V
CC
= 5V, I
LOAD
= 0 to 4mA,
V
OUT
= 30V
2.0
Load Regulation
MAX5026/MAX5028,
V
CC
= 3.3V, I
LOAD
= 0 to 1mA,
V
OUT
= 30V
1.0
%
Thermal Shutdown
140
°C
Thermal Shutdown Hysteresis 2°C