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參數(shù)資料
| 型號： | MAX738A |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 5V, Step-Down, Current-Mode PWM DC-DC Converters |
| 中文描述： | 5V、降壓型、電流模式PWM DC-DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/16頁 |
| 文件大?。?/td> | 229K |
| 代理商： | MAX738A |
M
5V, S tep-Down,
Current-Mode PWM DC-DC Converters
_______________________________________________________________________________________
7
NAME
FUNCTION
1
SHDN
Shutdown—active low. Ground to power-down chip, tie to V+ for normal operation.
Output voltage falls to 0V when
SHDN
is low.
2
REF
3
SS
Soft-Start. Capacitor between SS and GND provides soft-start and short-circuit protection.
510k
resistor from SS to
SHDN
provides current boost.
2
3
4
CC
Compensation Capacitor Input externally compensates the outer feedback loop.
Connect to OUT with a 330pF capacitor.
5
6
7
OUT
GND
LX
Output Voltage Sense Input provides regulation feedback sensing. Connect to +5V output.
Ground pins are internally connected. Connect both pins to ground.
Drain of internal P-channel power MOSFET.
7
8
9
8
V+
Supply-Voltage Input. Bypass to GND with 1μF ceramic and large-value electrolytic capaci-
tors in parallel. The 1μF capacitor must be as close to V+ and GND pins as possible.
N.C.
No Connect—no internal connections to these pins.
10, 11
12, 13, 14
1, 15, 16
4, 5, 6
______________________________________________________________Pin Desc ription
MAX730A
LOAD-TRANSIENT RESPONSE
50ms/div
A: VOUT, 50mV/div, DC-COUPLED
B: IOUT, 200mA/div, 20mA TO300mA
V+ = 9V
MAX738A/MAX744A
LOAD-TRANSIENT RESPONSE
50ms/div
A: VOUT, 50mV/div, DC-COUPLED
B: IOUT, 500mA/div, 50mA TO750mA
V+ = 12V
300mA
20mA
A
B
____________________________Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 3, T
A
= +25°C, unless otherwise noted.)
16-PIN
WIDE SO
8-PIN
DIP/SO
Reference-Voltage Output (+1.23V) supplies up to 100μA for extended loads.
Bypass to GND with a capacitor that does not exceed 0.047μF.
750mA
50mA
A
B
PIN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX738AC/D | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 DICE SALES DICE 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 |
| MAX738AC/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX738ACPA | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down DC/DC Converter 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 |
| MAX738ACPA+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down DC/DC Converter 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 |
| MAX738ACWE | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down DC/DC Converter 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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