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參數(shù)資料
| 型號： | MAX640 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters |
| 中文描述： | 5V/3.3V/3V/可調(diào)、高效率、低IQ、降壓型DC-DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 166K |
| 代理商： | MAX640 |
M
5V /3.3V /3V /Adjustable, High-Effic ienc y,
Low I
Q
, S tep-Down DC-DC Converters
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
V+...........................................................................................12V
LX .........................................................(V+ - 12V) to (V+ + 0.3V)
LBI, LBO, VFB, SHDN, VOUT........................-0.3V to (V+ + 0.3V)
LX Output Current (Note 1)......................................................1A
LBO Output Current............................................................10mA
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C)..........................471mW
CERDIP (derate 8.00mW/°C above +70°C)..................640mW
ELECTRICAL CHARACTERISTICS
(V+ = 9V for the MAX639, V+ = 5V for the MAX640/MAX653, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
, typical values are at T
A
= +25°C,
unless otherwise noted.)
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.
PARAMETER
MIN
4.0
TYP
MAX
11.5
20
5.20
UNITS
V
μA
91
94
87
91
85
89
12.5
16.7
8.8
71.4
8.3
Dropout Voltage
0.5
V
Output Voltage (Note 2)
2.88
3.00
3.12
V
3.17
3.30
3.43
Supply Current
Supply Voltage
10
5.00
4.80
Efficiency
%
CONDITIONS
MAX653
I
OUT
= 100mA, L = 100μH
MAX653, V+ = 4.0V to 11.5V, 0mA < I
OUT
< 100mA
MAX640, V+ = 4.0V to 11.5V, 0mA < I
OUT
< 100mA
MAX639
MAX640
SHDN
= V+, no load
MAX639, V+ = 6.0V to 11.5V, 0mA < I
OUT
< 100mA
Operating Temperature Ranges:
MAX639C_ _ .......................................................0°C to +70°C
MAX639E_ _ ....................................................-40°C to +85°C
MAX639MJ A ..................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
I
OUT
= 100mA, L = 100μH
I
OUT
= 25mA, L = 470μH
I
OUT
= 100mA, L = 100μH
I
OUT
= 25mA, L = 470μH
I
OUT
= 100mA, L = 100μH
I
OUT
= 25mA, L = 470μH
V+ = 9V, V
OUT
= 5V
V+ = 6V, V
OUT
= 3V
V+ = 9V, V
OUT
= 3.3V
V+ = 4V, V
OUT
= 3.3V
V+ = 9V, V
OUT
= 3V
V+ = 4V, V
OUT
= 3V
V+ = 9V, V
OUT
= 5V
V+ = 6V, V
OUT
= 3V
V+ = 9V, V
OUT
= 3.3V
V+ = 4V, V
OUT
= 3.3V
V+ = 9V, V
OUT
= 3V
V+ = 4V, V
OUT
= 3V
Switch On-Time
42.5
9.0
16.6
13.3
13.3
14.6
50.0
11.7
19.5
15.6
15.6
17.2
57.5
13.5
22.4
17.9
17.9
19.8
μs
10.6
14.2
7.5
60.7
7.1
14.4
19.2
10.1
82.1
9.5
MAX653
MAX639
MAX640
Switch Off-Time
14.6
17.2
19.8
μs
MAX653
MAX639
MAX640
Note 1:
Peak inductor current must be limited to 600mA by using an inductor of 100μH or greater.
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| MAX640ESA | CABLE ASSEMBLY; SMA MALE TO SMC PLUG; 50 OHM, RG188-DS COAX, DOUBLE SHIELDED; 6" CABLE LENGTH |
| MAX639CSA | 700-mW Mono, Differential Input, Class-AB Audio Amplifier with Active High Shutdown and Depop 8-SOIC -40 to 85 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6400BS22 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT IN 4-BUMP 2X2 CHIP-SCA - Bulk |
| MAX6400BS22+ | 制造商:Maxim Integrated Products 功能描述:PROCESSOR SUPERVISOR 2.2V 1UA 4UCSP - Rail/Tube |
| MAX6400BS22+T | 功能描述:監(jiān)控電路 uPower Supervisor RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6400BS22-T | 功能描述:監(jiān)控電路 RoHS:否 制造商:STMicroelectronics 監(jiān)測電壓數(shù): 監(jiān)測電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| MAX6400BS23 | 制造商:Maxim Integrated Products 功能描述:UP SUPERVISORY CIRCUIT IN 4-BUMP 2X - Rail/Tube |
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