MAX8553 데이터 시트보기 (PDF) - Maxim Integrated
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MAX8553 Datasheet PDF : 24 Pages
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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 = 0, ILIM = VL, PGND
= LX = POK = GND, BST = VL, TA = -40°C to +85°C, unless otherwise specified.) (Note 3)
PARAMETER
CONDITIONS
MIN
MAX UNITS
DRIVER
DH Gate-Driver On-Resistance
VBST - VLX = +5V
2.5
Ω
DL Gate-Driver On-Resistance
(Source)
DL high state
3.0
Ω
DL Gate-Driver On-Resistance
(Sink)
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
POWER-OK OUTPUT
Upper VTT, and VTTR Threshold
Lower VTT, and VTTR Threshold
Upper Threshold
Lower Threshold
POK Output Low Level
POK Output High Leakage
DL low state
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
MAX8553
MAX8553
MAX8554
MAX8554
ISINK = 2mA
VPOK = +5V
-3
1.65
3.15
VVL - 0.4
0.5
1.5
55
43
0.646
0.504
1.25
Ω
+3
µA
0.5
V
2.35
V
3.85
V
V
3.0
µA
V
0.8
V
57
45
0.698
0.552
0.4
5
% VREFIN
% VREFIN
V
V
V
µA
Note 1: Consult factory for applications that require higher than 3.5V output.
Note 2: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX forced to 0V, BST
forced to 5V, and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching
speeds.
Note 3: Specifications to -40°C are guaranteed by design and are not production tested.
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