Manual

MAX17101
Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, no load on LDO, RTC, OUT1, OUT2, and REF, V
IN
= 12V, V
DD
= V
CC
= V
SECFB
= 5V, V
REFIN2
= 1.0V, BYP =
LDOSEL = GND, ONLDO = IN, 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
OUT2 FAULT DETECTION
With respect to error-comparator threshold 12 16 20 %
OUT2 Overvoltage Trip
Threshold
V
OVP(OUT2)
Minimum overvoltage threshold 0.7 V
OUT2 Overvoltage
Fault-Propagation Delay
t
OVP
OUT2 forced 50mV above trip threshold 10 μs
OUT2 Undervoltage Protection
Trip Threshold
V
UVP(OUT2)
With respect to error-comparator threshold 65 70 75 %
OUT2 Overvoltage
Fault-Propagation Delay
t
OVP
OUT2 forced 50mV above trip threshold 10 μs
OUT2 Output Undervoltage
Fault-Propagation Delay
t
UVP
OUT2 forced 50mV below trip threshold 10 μs
PGOOD2 Lower Trip Threshold
With respect to error-comparator threshold,
falling edge, hysteresis = 2%
-20 -16 -12 %
PGOOD2 Propagation Delay t
PGOOD
_
OUT2 forced 50mV beyond PGOOD1 trip
threshold, falling edge
10 μs
PGOOD2 Output-Low Voltage
V
OUT2
= V
REFIN2
- 150mV (PGOOD2 low
impedance), I
SINK
= 4mA
0.3 V
PGOOD2 Leakage Current I
PGOOD
_
OUT2 = REFIN2 (PGOOD2 high impedance),
PGOOD2 forced to 5.5V, T
A
= +25°C
1 μA
CURRENT LIMIT
ILIM_ Adjustment Range V
ILIM
0.2 2.0 V
ILIM_ Current I
ILIM
5 μA
R
ILIM
_ = 100k 40 50 60
Valley Current-Limit Threshold
(Adjustable)
V
VALLEY
V
AGND
- V
LX
_
R
ILIM
_ = 200k 87 100 113
mV
Current-Limit Threshold
(Negative)
V
NEG
With respect to valley current-limit threshold,
SKIP = V
CC
-120 %
Ultrasonic Current-Limit
Threshold
V
NEG(US)
V
OUT1
= V
OUT2
= V
FB1
= 0.77V, V
REFIN2
= 0.70V 25 mV
Current-Limit Threshold
(Zero Crossing)
V
ZX
V
AGND
- V
LX
_, SKIP = GND or OPEN/REF 1 mV