Rainbow Electronics MAX17031 - Manual (Page 4)

MAX17031
Dual Quick-PWM Step-Down Controller with Low-
Power LDO and RTC Regulator for MAIN Supplies
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 2, no load on LDO5, RTC, OUT1, OUT2, and REF, V IN = 12V, V DD = V CC = V SKIP = 5V, ONLDO = RTC, ON1 = ON2
= V CC , T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER-GOOD
PGOOD Lower Trip Threshold
With respect to either error comparator
threshold, falling edge, hysteresis = 1%
-16 -13 -10 %
PGOOD Propagation Delay t PGOOD
OUT1 or OUT2 forced 50mV beyond
PGOOD trip threshold, falling edge
10 µs
PGOOD Output Low Voltage
ON1 or ON2 = GND (PGOOD low
impedance), I
SINK = 4mA
0.3 V
PGOOD Leakage Current I PGOOD
OUT1 and OUT2 in regulation (PGOOD
high impedance), PGOOD forced to 5.5V,
T
A = +25°C
1 µA
CURRENT LIMIT
ILIM_ Adjustment Range 0.2 2 V
ILIM_ Current 5 µA
R ILIM _ = 100k
(V ILIM _ = 500mV)
44 50 56
R ILIM _ = 200k
(V ILIM _ = 1.00V)
90 100 110
Valley Current-Limit Threshold
(Adjustable)
V LIM _ (VAL) V AGND - V LX _
R
ILIM
_ = 400k
(V ILIM _ = 2.00V)
180 200 220
mV
Current-Limit Threshold
(Negative)
V NEG
With respect to valley current-limit
threshold, V
SKIP = V REF
-120 %
Ultrasonic Current-Limit Threshold V NEG(US) V OUT2 = 3.5V, V OUT1 = 5.3V 20 mV
Current-Limit Threshold
(Zero Crossing)
V ZX
V AGND - V LX _,
V SKIP = V CC or GND
1.5 mV
GATE DRIVERS
DH_ Gate-Driver On-Resistance R DH BST1 - LX1 and BST2 - LX2 forced to 5V 1.5 3.5
DL1, DL2; high state 1.4 4.5
DL_ Gate-Driver On-Resistance R DL
DL1, DL2; low state 0.5 1.5
DH_ Gate-Driver
Source/Sink Current
I DH
DH1, DH2 forced to 2.5V,
BST1 - LX1 and BST2 - LX2 forced to 5V
2 A
DL_ Gate-Driver Source Current
I DL
(SOURCE)
DL1, DL2 forced to 2.5V 1.7 A
DL_ Gate-Driver Sink Current I DL (SINK) DL1, DL2 forced to 2.5V 3.3 A
DL1, DL2 rising (Note 4) 30
Dead Time t DEAD
DH1, DH2 rising (Note 4) 35
ns
Internal BST_ Switch
On-Resistance
R BST I BST _ = 10mA, V DD = 5V 5.5
BST_Leakage Current
V
BST
_ = 26V, T
A
= +25°C;
OUT1 and OUT2 above regulation threshold
0.1 5 µA