Rainbow Electronics MAX15046B - Manual (Page 4)

40V, High-Performance Synchronous
Buck Controller
MAX15046
4 ______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 24V, V EN = 5V, V GND = V PGND = 0V, C IN = 1FF, C VCC = 4.7FF, R RT = 49.9kI, T A = T J = -40NC to +125NC, unless otherwise
noted. Typical values are at T A = +25NC.) (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:
9
RT
-7 2
SW SW
17.3 10
R
f (1 x 10 )(f )
×
=
+
, where f SW is in Hertz.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DL Peak Current C LOAD = 10nF
Sinking, V DRV = V CC
= 5.25V
3
A
Sourcing, V DRV =
V CC = 5.25V
2
DH, DL Break-Before-Make Time
(Dead Time)
10 ns
SOFT-START
Soft-Start Duration 2048
Switching
Cycles
Reference Voltage Steps 64 Steps
CURRENT LIMIT/HICCUP
Cycle-by-Cycle Valley Current-
Limit Threshold Adjustment
Range V CSP - V PGND ,
valley limit =
V
LIM /10
V LIM = 0.3V 30
mV
V LIM = 3V 300
LIM Reference Current I LIM V LIM = 0.3V to 3V, T A = +25NC 45 50 55 F A
LIM Reference Current
Temperature Coefficient
2300 ppm/NC
CSP Input Bias Current V CSP = 40V -1 +1 F A
Number of Consecutive Current-
Limit Events to Hiccup
7 Events
Hiccup Timeout 4096
Switching
Cycles
Peak Low-Side Sink Current-Limit
Threshold
V CSP - V PGND , sink limit = V LIM /20,
R ILIM = 30kI, V LIM = 1.5V,
T A = +25NC
75 mV
POWER-GOOD (PGOOD)
PGOOD Threshold V FB rising 90 94 97.5 %V FB
PGOOD Threshold Hysteresis V FB falling 2.65 %V FB
PGOOD Output Low Voltage V PGOOD_L I PGOOD = 2mA, V EN = 0V 0.4 V
PGOOD Output Leakage Current I LEAK_PGOOD V PGOOD = 40V, V EN = 5V, V FB = 1V -1 +1 F A
THERMAL SHUTDOWN
Thermal Shutdown Threshold
Temperature rising +150 N C
Thermal Shutdown Hysteresis 20 N C