參數資料
型號： MAX1809
廠商： Maxim Integrated Products, Inc.
英文描述： 3A, 1MHz, DDR Memory Termination Supply
中文描述： 3A、1MHz、DDR存儲器端接電源
文件頁數： 2/17頁
文件大?。?/td> 803K
代理商： MAX1809
M
3A, 1MHz, DDR Memory Termination Supply
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V
CC
, IN to GND ........................................................-0.3V to +6V
IN to V
CC
.............................................................................±0.3V
GND to PGND.....................................................................±0.3V
SHDN
, SS, FB, T
OFF
, R
REF
,
EXTREF to GND.......................................-0.3V to (V
CC
+ 0.3V)
LX Current (Note 1).............................................................±4.7A
REF Short Circuit to GND Duration ............................Continuous
ELECTRICAL CHARACTERISTICS
(V
IN
= V
CC
= 3.3V, V
EXTREF
= 1.1V,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1:
LX has clamp diodes to PGND and IN. If continuous current is applied through these diodes, thermal limits must be
observed.
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QFN (derate 20mW/°C above +70°C;
part mounted on 1in
2
of 1oz copper)..............................1.6W
16-Pin QSOP (derate 12.5mW/°C above +70°C;
part mounted on 1in
2
of 1oz copper).................................1W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETER
SYMBOL
V
IN
,V
CC
CONDITIONS
MIN
3.0
TYP
MAX
5.5
UNITS
V
Input Voltage
Feedback Voltage Accuracy
(V
FB
- V
EXTREF
)
Feedback Load Regulation Error
V
IN
= V
CC
= 3V to 5.5V, I
LOAD
= 0,
V
EXTREF
= 1.25V (Note 2)
I
LOAD
= -3A to +3A, V
EXTREF
= 1.25V
-12
+12
mV
V
FB
20
mV
External Reference Voltage
Range
V
EXTREF
V
IN
= V
CC
= 3V to 5.5V
V
REF
-
0.01
V
IN
-
1.7
V
Reference Voltage
Reference Load Regulation
V
REF
1.078
1.100
0.5
90
110
70
80
4.1
1.122
2.0
200
250
150
200
4.7
1
V
I
REF
= -1μA to +10μA
mV
V
IN
= 4.5V
V
IN
= 3V
V
IN
= 4.5V
V
IN
= 3V
PMOS Switch
On-Resistance
R
PMOS
I
LX
= 0.5A
m
NMOS Switch
On-Resistance
R
NMOS
I
LX
= 0.5A
m
Current-Limit Threshold
Switching Frequency
I
LIMIT
f
SW
I
CC
I
IN
I
SHDN
V
IN
> V
LX
(Note 3)
f
SW
= 500kHz
f
SW
= 500kHz
SHDN
= GND, I
CC
+ I
IN
Hysteresis = 15
°
C
V
CC
falling, hysteresis = 90mV
V
FB
= V
EXTREF
+ 0.1V
R
TOFF
= 30.1k
R
TOFF
= 110k
R
TOFF
= 499k
3.5
A
MHz
1
16
<1
160
2.6
60
0.30
1.0
4.5
4 x t
OFF
No Load Supply Current
mA
Shutdown Supply Current
Thermal-Shutdown Threshold
Undervoltage Lockout Threshold
FB Input Bias Current
15
μA
°
C
V
nA
2.5
0
0.24
0.9
3.8
2.7
250
0.37
1.1
5.2
I
FB
Off-Time
t
OFF
μs
Startup Off-Time
On-Time
μs
μs
t
ON
(Note 3)
0.35
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相關代理商/技術參數
參數描述
MAX1809EEE 功能描述:直流/直流開關轉換器 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 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX1809EEE+ 功能描述:電壓模式 PWM 控制器 3A 1MHz DDR Memory Termination Supply RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX1809EEE+T 功能描述:電壓模式 PWM 控制器 3A 1MHz DDR Memory Termination Supply RoHS:否 制造商:Texas Instruments 輸出端數量:1 拓撲結構:Buck 輸出電壓:34 V 輸出電流: 開關頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel
MAX1809EEE-T 功能描述:直流/直流開關轉換器 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 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
MAX1809EGI 功能描述:直流/直流開關轉換器 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 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT
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