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参数资料
| 型号： | MAX1917EEE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/18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 = -40 ° C to +85 ° C , unless otherwise specified.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Upper VTTR Threshold
Lower VTTR Threshold
POK Output Low Level
POK Output High Leakage
I SINK = 2mA
V POK = 5.5V
110
86
114
90
0.4
5
%V DDR
/2
%V DDR
/2
V
μA
Note 1: 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 2: Specifications to -40 ° C are guaranteed by design and are not production tested.
Typical Operating Characteristics
(V+ = 12V, V OUT = 1.25V, T A = +25 ° C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
AT 1.25V OUTPUT
EFFICIENCY vs. LOAD CURRENT
AT 0.9V OUTPUT
EFFICIENCY vs. LOAD CURRENT
AT 1.25V OUTPUT
100
95
V IN = 2.5V
96
94
V IN = 2.5V
100
90
V IN = 2.5V
90
92
80
85
80
75
70
65
60
V IN = 2V
V IN = 5V
90
88
86
84
82
80
V IN = 5V
70
60
50
40
30
20
V IN = 12V
V IN = 5V
55
CIRCUIT OF FIGURE 3
78
CIRCUIT OF FIGURE 3
10
CIRCUIT OF FIGURE 4
50
76
0
0.1
1.0
10.0
0.1
1.0
10.0
0.1
1.0
10.0
95
LOAD CURRENT (A)
EFFICIENCY vs. LOAD CURRENT
AT 0.9V OUTPUT
650
LOAD CURRENT (A)
FREQUENCY vs. LOAD CURRENT
AT 1.25V OUTPUT
650
LOAD CURRENT (A)
FREQUENCY vs. LOAD CURRENT
AT 0.9V OUTPUT
90
85
V IN = 2.5V
600
V IN = 2.5V
600
80
550
V IN = 5V
550
V IN = 2.5V
75
70
65
V IN = 5V
500
450
400
V IN = 12V
500
450
400
V IN = 5V
60
55
CIRCUIT OF FIGURE 4
350
CIRCUIT OF FIGURE 3
350
CIRCUIT OF FIGURE 3
50
300
300
0.1
1.0
10.0
-8
-6
-4
-2
0
2
4
6
8
-8
-6
-4
-2
0
2
4
6
8
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
6
_______________________________________________________________________________________
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