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參數(shù)資料
| 型號(hào)： | MAX1672 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類(lèi)： | DC/DC變換器 |
| 英文描述： | Step-Up/Down DC-DC Converter in QSOP Package |
| 中文描述： | 升/降壓型DC-DC轉(zhuǎn)換器，QSOP封裝 |
| 文件頁(yè)數(shù)： | 5/12頁(yè) |
| 文件大?。?/td> | 143K |
| 代理商： | MAX1672 |
M
S tep-Up/Down DC-DC Converter
in QS OP Pac kage
_______________________________________________________________________________________
5
______________________________________________________________Pin Desc ription
NAME
FUNCTION
1
2
LX
Inductor Connection to the Drain of the Internal N-Channel Power MOSFET
Power Ground
PIN
_____________________________Typic al Operating Charac teristic s (c ontinued)
(T
A
= +25°C, unless otherwise noted.)
A
B
10
μ
s/div
OUTPUT RIPPLE (HEAVY LOAD)
MAX1672-13
A: V
OUT
= 5V (20mV/div, AC COUPLED)
B: I
L1
(500mA /div) (V
IN
= 2.7V, I
OUT
= 250mA)
A
B
50
μ
s/div
START-UP DELAY
MAX1672-14
A: V
OUT
= (2V/div)
B: ONB (2V/div) (V
IN
= 2.7V, R
LOAD
= 50
)
A
B
200
μ
s/div
TURN-OFF DELAY
MAX1672-15
A: V
= (2V/div)
B: ONB (2V/div) (V
IN
= 2.7V, R
LOAD
= 50
)
PGND
3
ONB
On Control Input. When
ONB
= low or ONA = high, the IC is on. Connect
ONB
to GND for normal operation
(Table 1).
4
ONA
On Control Input. When ONA = low and
ONB
= high, the IC is off. Connect ONA to PS for normal operation
(Table 1).
5
3/
5
Output Voltage Selection Input. Connect to PS for 3.3V output and to GND for 5V output. With V
FB
> 80mV,
the state of the 3/
5
pin is ignored. (Table 2).
6
7
8
9
PGI
PGO
ILIM
OUT
Low-Battery Detector Input (1.25V threshold)
Low-Battery Detector Output (open drain).
PGO
pulls low when V
PGI
is greater than 1.25V.
Inductor-Current-Limit Selection Input. Connect to PS for 0.8A current limit and to GND for 0.5A current limit.
Regulator Output. Drain of internal PFET linear regulator. Bypass with a 4.7μF capacitor to GND.
10
FB
Feedback Input. For 3.3V or 5V output, connect to GND. For adjustable output, connect to feedback resistor-
divider network. With V
FB
> 70mV, the state of the 3/
5
pin is ignored.
11
PS
Bootstrapped Power Supply. Output of step-up switch-mode regulator and source of internal PFET linear
regulator. The IC is powered from this pin.
12
13
14
15
16
IN
REF
GND
PGND
LX
Input Voltage Sense Input. Connect to input supply.
Reference Voltage Output. Bypass with a 0.1μF capacitor to GND.
Analog Ground
Power Ground
Inductor Connection to the Drain of the Internal N-Channel Power MOSFET
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| MAX1672C/D | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX1672EEE | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-Up/Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX1672EEE+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-Up/Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX1672EEE+T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-Up/Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX1672EEE-T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 Step-Up/Down RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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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