Electrical characteristics (continued) – Rainbow Electronics MAX15026 User Manual
Page 4
MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LIM Reference Current
I
LIM
V
LIM
= 0.3V to 3V (Note 4)
45
50
55
µA
LIM Reference Current Tempco
V
LIM
= 0.3V to 3V
2300
ppm/°C
Number of Consecutive Current-
Limit Events to Hiccup
7
Events
Soft-Start Timeout
4096
Switching
Cycles
Soft-Start Restart Timeout
8192
Switching
Cycles
Hiccup Timeout
Out of soft-start
4096
Switching
Cycles
Peak Low-Side Sink Current
Limit
Sink limit = 1.5V, R
LIM
= 30k
Ω (Note 4)
75
mV
BOOST
Boost Switch Resistance
V
IN
= V
CC
= 5V, I
BST
= 10mA
3
8
Ω
POWER-GOOD OUTPUT
PGOOD Threshold Rising
88
93
97
% V
FB
PGOOD Threshold Falling
86
90
94
%V
FB
PGOOD Output Leakage
I
LEAK_PGD
V
IN
= V
PGOOD
= 28V, V
EN
= 5V, V
FB
= 1V
-1
+1
µA
PGOOD Output Low Voltage
V
PGOOD_L
I
PGOOD
= 2mA, EN = GND
0.4
V
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Temperature rising
+150
°C
Thermal-Shutdown Hysteresis
Temperature falling
20
°C
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 12V, R
RT
= 27k
Ω, R
LIM
= 30k
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 2)
Note 2: All devices are 100% tested at room temperature and guaranteed by design over the specified temperature range.
Note 3: Select R
RT
as: where
f
SW
is in Hertz.
Note 4: T
A
= +25°C.
R
17.3 10
f
1x10 )x(f
RT
9
SW
7
SW
=
Ч
+
−
(
)
2