参数资料
型号: MAX8554EEE+T
厂商: Maxim Integrated Products
文件页数: 4/24页
文件大小: 0K
描述: IC CNTRLR BUCK PWM 16-QSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
系列: Quick-PWM™
应用: 控制器,DDR,DDR2
输入电压: 4.5 V ~ 28 V
输出数: 1
输出电压: 0.6 V ~ 3.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-QSOP
包装: 带卷 (TR)
4.5V to 28V Input, Synchronous PWM Buck Controllers
for DDR Termination and Point-of-Load Applications
ELECTRICAL CHARACTERISTICS (continued)
(V V+ = V HSD = +12V, V EN/HSD = V REFIN = +2.5V, V EN = +5V, C VL = 4.7μF, C VTTR = 1μF, C REF = 0.22μF, V FSEL = 0V, ILIM = VL,
PGND = LX = GND, BST = VL, T A = 0°C to +85°C. Typical values are at T A = +25 ° C, unless otherwise specified.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT LIMIT
LX to PGND, ILIM = VL
80
100
115
Current-Limit Threshold (Positive
Direction)
Current-Limit Threshold (Negative
Direction)
LX to PGND, R ILIM = 100k ?
LX to PGND, R ILIM = 400k ?
LX to PGND, ILIM = VL, with respect to positive
current-limit threshold
35
160
-130
50
200
-110
65
230
-90
mV
%
ILIM Input Current
FAULT DETECTION
5
μA
MAX8553 (V REFIN > +1V)
57
60
63
% V REFIN
Overvoltage Threshold
MAX8553 (V REFIN ≤ +1V)
MAX8554
0.576
0.696
0.600
0.720
0.624
0.744
V
VL REGULATOR
Output Voltage
Line Regulation
+6V < V V+ <+28V, 1mA < I VL < 35mA
+6V < V V+ < +28V, I VL = 10mA
4.80
5.0
0.2
5.33
V
%
RMS Output Current
35
mA
Bypass Capacitor
ESR < 100m ?
2.2
μF
DRIVER
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
(Source)
DL Gate-Driver On-Resistance
(Sink)
Dead Time
V BST - V LX = +5V
DL high state
DL low state
DL rising
DL falling
1.4
1.6
0.75
32
30
2.5
3.0
1.25
?
?
?
ns
FSEL LOGIC
Logic Input Current
Logic Low (GND)
-3
+3
0.5
μA
V
Logic REF Level
Logic Float Level
Logic VL Level
FSEL = REF
FSEL unconnected
FSEL = VL
1.65
3.15
V VL - 0.4
2.35
3.85
V
V
V
EN/HSD OR EN LOGIC
EN/HSD or EN Shutdown Current
Max I EN/HSD for V EN/HSD < +0.8V or V EN < +0.8V
0.5
3.0
μA
Logic High
Logic Low
V VL = V V+ = +4.5 to +5.5V, 100mV hysteresis
V VL = V V+ = +4.5 to +5.5V
1.5
0.8
V
V
4
_______________________________________________________________________________________
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