Electrical characteristics (continued) – Rainbow Electronics MAX15023 User Manual
Page 4
MAX15023
Wide 4.5V to 28V Input, Dual-Output
Synchronous Buck Controller
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, R
T
= 33k
Ω, 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 _
/
24
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
Temperature rising
+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
R k
f
kHz
has a
T
SW
(
)
(
(
))
(
.
Ω =
×
24806
24806
1 0663
).
1
farad
unit