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参数资料
| 型号： | MAX1917 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Tracking, Sinking and Sourcing, Synchronous Buck Controller for DDR Memory and Termination Supplies |
| 中文描述： | 跟踪、可吸入/源出电流、同步buck控制器，用于DDR存储器及端接电源 |
| 文件页数： | 3/18页 |
| 文件大小： | 336K |
| 代理商： | MAX1917 |
M
Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
_______________________________________________________________________________________
3
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
CONDITIONS
MIN
TYP
+160
MAX
UNITS
°
C
Thermal Shutdown
SOFT-START
Rising temperature, typical hysteresis = 15
°
C
ILIM Ramp Period
Ramps the ILIM trip threshold from 20% to 100%
in 20% increments
1.7
ms
OSCILLATOR
FSEL = VL
FSEL = unconnected
FSEL = REF
FSEL = GND
FSEL = VL
FSEL not connected
FSEL = REF
FSEL = GND
200
300
400
550
2.5
1.67
1.25
0.91
350
Oscillator Frequency
kHz
2.18
1.45
1.09
0.82
2.83
1.89
1.41
1.00
400
On Time (Note 1)
μs
Minimum Off Time (Note 1)
CURRENT LIMIT
ns
LX to PGND, ILIM = VL
LX to PGND, R
ILIM
= 100k
LX to PGND, R
ILIM
= 400k
LX to PGND, ILIM = VL, with percentage of positive
current-limit threshold
90
40
170
100
50
200
110
60
230
Current-Limit Threshold
(Positive Direction)
mV
Current-Limit Threshold
(Negative Direction)
-90
-110
-130
%
ILIM Input Current
V
L
REGULATOR
5
μA
Output Voltage
5.5V < V+ < 14V
1mA < I
VL
< 35mA
5.5V < V+ < 14V, I
VL
= 10mA
4.8
5.0
5.2
V
Line Regulation
RMS Output Current
Bypass Capacitor
DRIVER
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
(Source)
0.2
%
mA
μF
35
ESR < 100m
2.2
V
BST
- V
LX
= 5V
1.4
2.5
DL high state
1.6
3
DL Gate-Driver On-Resistance
(Sink)
DL low state
0.75
1.25
DL rising
DL falling
32
30
Dead Time
ns
FSEL LOGIC
Logic Input Current
Logic GND Level
Logic REF Level
Logic Float Level
-3
3
μA
V
V
V
0.5
2.35
3.85
FSEL = VREF
FSEL floating
1.65
3.15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1917EEE | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1917EEE+ | 功能描述:直流/直流开关转换器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1917EEE+T | 功能描述:直流/直流开关转换器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1917EEE-T | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX1917EEE-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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