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參數(shù)資料
| 型號： | MAX639CPA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 5V/3.3V/3V/Adjustable, High-Efficiency, Low IQ, Step-Down DC-DC Converters |
| 中文描述： | 1 A SWITCHING REGULATOR, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 166K |
| 代理商： | MAX639CPA |
________________________________________________________________ Maxim Integrated Products
1
_______________General Desc ription
The MAX639/MAX640/MAX653 step-down switching
regulators provide high efficiency over a wide range of
load currents, delivering up to 225mA. A current-limiting
pulse-frequency-modulated (PFM) control scheme gives
the devices the benefits of pulse-width-modulated
(PWM) converters (high efficiency at heavy loads), while
using only 10μA of supply current (vs. 2mA to 10mA for
PWM converters). The result is high efficiency over a
wide range of loads.
The MAX639/MAX640/MAX653 input range is 4V to
11.5V, and the devices provide lower preset output volt-
ages of 5V, 3.3V, and 3V, respectively. Or, the output
can be user-adjusted to any voltage from 1.3V to the
input voltage.
The MAX639/MAX640/MAX653 have an internal 1A power
MOSFET switch, making them ideal for minimum-compo-
nent, low- and medium-power applications. For increased
output drive capability, use the MAX649/MAX651/MAX652
step-down controllers, which drive an external P-channel
FET to deliver up to 5W.
________________________Applic ations
9V Battery to 5V, 3.3V, or 3V Conversion
High-Efficiency Linear Regulator Replacement
Portable Instruments and Handy-Terminals
5V-to-3.3V Converters
____________________________Features
o
High Efficiency for a Wide Range of Load Currents
o
10μA Quiescent Current
o
Output Currents Up to 225mA
o
Preset or Adjustable Output Voltage:
5.0V (MAX639)
3.3V (MAX640)
3.0V (MAX653)
o
Low-Battery Detection Comparator
o
Current-Limiting PFM Control Scheme
______________Ordering Information
Ordering Information continued on last page.
*Contact factory for dice specifications.
M
5V /3.3V /3V /Adjustable, High-Effic ienc y,
Low I
Q
, S tep-Down DC-DC Converters
19-4505; Rev 3; 8/97
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
MAX639
CPA
MAX639CSA
MAX639C/D
MAX639EPA
1
2
3
4
5
8
7
6
MAX639
MAX640
MAX653
DIP/SO
TOP VIEW
VFB
SHDN
V+
LX
VOUT
LBO
LBI
GND
__________________Pin Configuration
GND
MAX639
SHDN
LX
VOUT
LBO
LOW-BATTERY
DETECTOR
OUTPUT
ON/OFF
LBI
LOW-BATTERY
DETECTOR
INPUT
OUTPUT
5V
225mA
INPUT
5.5V TO 11.5V
V+
VFB
__________Typic al Operating Circ uit
MAX639ESA
MAX639MJ A
-40°C to +85°C
-55°C to +125°C
8 SO
8 CERDIP
INFEVALUATION KIT
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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PDF描述 |
|---|---|
| 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 |
| MAX639EPA | 700-mW Mono, Differential Input, Class-AB Audio Amplifier with Active High Shutdown and Depop 8-SOIC -40 to 85 |
| MAX640CPA | 700-mW Mono, Differential Input, Class-AB Audio Amplifier with Active Low Shutdown 8-SOIC -40 to 85 |
| MAX640CSA | 700-mW Mono, Differential Input, Class-AB Audio Amplifier with Active Low Shutdown 8-MSOP-PowerPAD -40 to 85 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX639CPA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5/3.3/3V Adjustable Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| MAX639CSA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5/3.3/3V Adjustable Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| MAX639CSA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5/3.3/3V Adjustable Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| MAX639CSA+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5/3.3/3V Adjustable Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
| MAX639CSA-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5/3.3/3V Adjustable Step-Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT |
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