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参数资料
| 型号： | MAX1917EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/18页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR SYNC BUCK 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 控制器，DDR |
| 输入电压： | 4.5 V ~ 22 V |
| 输出数： | 2 |
| 输出电压： | 0.4 V ~ 5 V |
| 工作温度： | 0°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) |
Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 12V, V EN/HSD = V DDR = 2.5V, C VL = 4.7μF, C VTTR = 1μF, C REF = 0.22μF, V FSEL = 0, ILIM = VL, PGND = LX = POK = GND,
BST = VL. Specifications are for T A = 0 ° C to +85 ° C . Typical values are at T A = +25 ° C, unless otherwise specified.)
PARAMETER
Thermal Shutdown
CONDITIONS
Rising temperature, typical hysteresis = 15 ° C
MIN
TYP
+160
MAX
UNITS
° C
SOFT-START
ILIM Ramp Period
Ramps the ILIM trip threshold from 20% to 100%
in 20% increments
1.7
ms
OSCILLATOR
FSEL = VL
200
Oscillator Frequency
FSEL = unconnected
FSEL = REF
FSEL = GND
300
400
550
kHz
FSEL = VL
2.18
2.5
2.83
On Time (Note 1)
Minimum Off Time (Note 1)
FSEL not connected
FSEL = REF
FSEL = GND
1.45
1.09
0.82
1.67
1.25
0.91
350
1.89
1.41
1.00
400
μs
ns
CURRENT LIMIT
LX to PGND, ILIM = VL
90
100
110
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 percentage of positive
current-limit threshold
40
170
-90
50
200
-110
60
230
-130
mV
%
ILIM Input Current
V L REGULATOR
5
μA
Output Voltage
Line Regulation
5.5V < V+ < 14V
1mA < I VL < 35mA
5.5V < V+ < 14V, I VL = 10mA
4.8
5.0
0.2
5.2
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
1.25
?
?
?
ns
FSEL LOGIC
Logic Input Current
Logic GND Level
-3
3
0.5
μA
V
Logic REF Level
Logic Float Level
FSEL = VREF
FSEL floating
1.65
3.15
2.35
3.85
V
V
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