MAX8553 Просмотр технического описания (PDF) - Maxim Integrated
Номер в каталоге
Компоненты Описание
производитель
MAX8553 Datasheet PDF : 24 Pages
| |||
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)
(VV+ = VHSD = +12V, VEN/HSD = VREFIN = +2.5V, VEN = +5V, CVL = 4.7µF, CVTTR = 1µF, CREF = 0.22µF, VFSEL = 0V, ILIM = VL,
PGND = LX = GND, BST = VL, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise specified.)
PARAMETER
CURRENT LIMIT
Current-Limit Threshold (Positive
Direction)
Current-Limit Threshold (Negative
Direction)
CONDITIONS
LX to PGND, ILIM = VL
LX to PGND, RILIM = 100kΩ
LX to PGND, RILIM = 400kΩ
LX to PGND, ILIM = VL, with respect to positive
current-limit threshold
MIN TYP MAX UNITS
80
100 115
35
50
65
mV
160 200 230
-130 -110 -90
%
ILIM Input Current
FAULT DETECTION
Overvoltage Threshold
VL REGULATOR
Output Voltage
Line Regulation
RMS Output Current
Bypass Capacitor
DRIVER
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
(Source)
MAX8553 (VREFIN > +1V)
MAX8553 (VREFIN ≤ +1V)
MAX8554
+6V < VV+ <+28V, 1mA < IVL < 35mA
+6V < VV+ < +28V, IVL = 10mA
ESR < 100mΩ
VBST - VLX = +5V
DL high state
5
µA
57
0.576
0.696
60
0.600
0.720
63
0.624
0.744
% VREFIN
V
4.80
5.0
5.33
V
0.2
%
35
mA
2.2
µF
1.4
2.5
Ω
1.6
3.0
Ω
DL Gate-Driver On-Resistance
(Sink)
Dead Time
FSEL LOGIC
Logic Input Current
Logic Low (GND)
Logic REF Level
Logic Float Level
Logic VL Level
EN/HSD OR EN LOGIC
EN/HSD or EN Shutdown Current
Logic High
Logic Low
DL low state
DL rising
DL falling
FSEL = REF
FSEL unconnected
FSEL = VL
Max IEN/HSD for VEN/HSD < +0.8V or VEN < +0.8V
VVL = VV+ = +4.5 to +5.5V, 100mV hysteresis
VVL = VV+ = +4.5 to +5.5V
0.75 1.25
Ω
32
ns
30
-3
1.65
3.15
VVL - 0.4
+3
µA
0.5
V
2.35
V
3.85
V
V
0.5
3.0
µA
1.5
V
0.8
V
4 _______________________________________________________________________________________
Share Link: 