MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
4
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, R
T
= 33kΩ, C
VCC
= 4.7µF, C
IN
= 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
(Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CURRENT LIMIT/HICCUP
Cycle-by-Cycle, Low-Side,
Source Peak Current-Limit
Threshold Adjustment Range
Source peak limit = V
LIM_
/10 30 300 mV
LIM_ Reference Current I
LIM_
V
LIM_
= 0.3V to 3V, T
A
= +25°C 45 50 55 µA
LIM_ Reference Current TC V
LIM_
= 0.3V 2400 ppm/°C
Number of Consecutive Current-
Limit Events to Hiccup
7 Events
Hiccup Timeout Out of soft-start 7936
Switching
cycles
Cycle-by-Cycle, Low-Side,
Sink Peak Current-Limit Sense
Voltage
V
L IM _
/
20
V
BOOST
Boost Switch Resistance V
IN
= V
CC
= 5.2V, I
BST_
= 10mA 4.5 8 Ω
POWER-GOOD OUTPUTS
V
FB_
rising 88.5 92.5 96.5
PGOOD_ Threshold
V
FB_
falling 85.5 89.5 93.5
%
V
FB
N OM IN A L
PGOOD_ Output Leakage I
LEAK_PGD
V
PGOOD_
= 28V, V
EN_
= 5V, V
FB_
= 0.8V 1 µA
PGOOD_ Output Low Voltage V
PGOOD_L
I
PGOOD_
= 2mA, EN_ = SGND 0.4 V
THERMAL SHUTDOWN
Thermal Shutdown Threshold +150 °C
Thermal Shutdown Hysteresis Temperature falling 20 °C
Note 3: All
Electrical Characteristics
limits over temperature are 100% tested at room temperature and guaranteed by design over
the specified temperature range.
Note 4: Select R
T
as
Rk
fkHz
has a
T
SW
()
(())
(
.
Ω=
24806
24806
1 0663
11
farad
unit).
