MAX15046_10 Datasheet, PDF (4/24 Pages) Maxim Integrated Products – 40V, High-Performance, Synchronous Buck Controller

40V, High-Performance Synchronous
Buck Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 24V, VEN = 5V, VGND = VPGND = 0V, CIN = 1FF, CVCC = 4.7FF, RRT = 49.9kI, TA = TJ = -40NC to +125NC, unless otherwise
noted. Typical values are at TA = +25NC.) (Note 2)
PARAMETER
DL Peak Current
DH, DL Break-Before-Make Time
(Dead Time)
SOFT-START
Soft-Start Duration
Reference Voltage Steps
CURRENT LIMIT/HICCUP
SYMBOL
CONDITIONS
MIN
Sinking, VDRV = VCC
= 5.25V
CLOAD = 10nF
Sourcing, VDRV =
VCC = 5.25V
TYP
3
2
10
MAX
UNITS
A
ns
2048
64
Switching
Cycles
Steps
Cycle-by-Cycle Valley Current-
Limit Threshold Adjustment
Range
VCSP - VPGND,
valley limit =
VLIM/10
VLIM = 0.3V
VLIM = 3V
30
mV
300
LIM Reference Current
LIM Reference Current
Temperature Coefficient
ILIM
VLIM = 0.3V to 3V, TA = +25NC
45
50
55
FA
2300
ppm/NC
CSP Input Bias Current
Number of Consecutive Current-
Limit Events to Hiccup
VCSP = 40V
-1
+1
FA
7
Events
Hiccup Timeout
4096
Switching
Cycles
Peak Low-Side Sink Current-Limit
Threshold
VCSP - VPGND, sink limit = VLIM/20,
RILIM = 30kI, VLIM = 1.5V,
TA = +25NC
POWER-GOOD (PGOOD)
PGOOD Threshold
VFB rising
90
PGOOD Threshold Hysteresis
VFB falling
PGOOD Output Low Voltage
VPGOOD_L IPGOOD = 2mA, VEN = 0V
PGOOD Output Leakage Current ILEAK_PGOOD VPGOOD = 40V, VEN = 5V, VFB = 1V -1
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Temperature rising
Thermal Shutdown Hysteresis
75
94
97.5
2.65
0.4
+1
+150
20
mV
%VFB
%VFB
V
FA
NC
NC
Note 2: All devices are 100% tested at room temperature and guaranteed by design over the specified temperature range.
Note 3:
Select
RRT
as:
R_RT
=
f_SW
17.3 ×10 ⁹
+ (1 x 10 ^-7)(f_SW ²)
,
where
fSW
is
in
Hertz.
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