參數(shù)資料
型號： MAX1917
廠商： 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： 跟蹤、可吸入/源出電流、同步buck控制器，用于DDR存儲器及端接電源
文件頁數(shù)： 5/18頁
文件大?。?/td> 336K
代理商： MAX1917
M
Tracking, Sinking and Sourcing, Synchronous Buck
Controller for DDR Memory and Termination Supplies
_______________________________________________________________________________________
5
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
1.5
TYP
MAX
1.7
UNITS
V
Reference UVLO
VTTR
VTTR Output Voltage Range
V+ = VL = 5V
0
1.8
50.5
51
50.5
V
I
VTTR
= -5mA to +5mA
I
VTTR
= -25mA to +25mA, V
DDR
= 1.8V
I
VTTR
= -25mA to +25mA, V
DDR
= 3.6V
49.5
49
49.5
VTTR Output Accuracy
%V
DDR
OSCILLATOR
FSEL = VL
FSEL not connected
FSEL = REF
FSEL = GND
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
85
35
160
110
60
230
Current-Limit Threshold
(Positive Direction)
mV
Current-Limit Threshold
(Negative Direction)
VL REGULATOR
Output Voltage
RMS Output Current
Bypass Capacitor
FSEL LOGIC
Logic Input Current
Logic GND Level
Logic REF Level
Logic Float Level
Logic VL Level
EN/HSD LOGIC
EN/HSD Shutdown Current
Logic High
Logic Low
POWER-OK OUTPUT
-90
-130
%
5.5V < V+
< 14V; 1mA < I
VL
< 35mA
ESR < 100m
4.8
2.2
5.2
35
V
mA
μF
3
μA
V
V
V
V
0.5
2.35
3.85
FSEL = VREF
FSEL floating
FSEL = VL
1.65
3.15
VL - 0.4
I
EN/HSD
for V
EN/HSD
= 0.8V
VL = V+ = 4.5V to 5.5V, 100mV hysteresis
VL = V+ = 4.5V to 5.5V
0.5
1.45
3.0
μA
V
V
0.8
Upper VTT Threshold
110
114
%V
DDR
/2
%V
DDR
/2
Lower VTT Threshold
86
90
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參數(shù)描述
MAX1917EEE 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX1917EEE+ 功能描述:直流/直流開關轉(zhuǎn)換器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX1917EEE+T 功能描述:直流/直流開關轉(zhuǎn)換器 Track/Sink/Source Synchronous Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX1917EEE-T 功能描述:直流/直流開關轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格: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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