參數(shù)資料
型號(hào)： MAX1672
廠商： Maxim Integrated Products, Inc.
元件分類： 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
文件頁數(shù)： 1/12頁
文件大?。?/td> 143K
代理商： MAX1672
________________General Desc ription
The MAX1672 integrates a step-up DC-DC converter with a
linear regulator to provide step-up/down voltage conver-
sion. This device provides a constant output voltage for
inputs that vary above and below the output voltage. It has
a 1.8V to 11V input range and a preset 3.3V or 5V output.
The output can also be set from 1.25V to 5.5V using two
resistors. Typical efficiency is 85%.
The MAX1672’s step-up/linear-regulator configuration per-
mits the use of a single, physically smaller inductor than
can be used with competing SEPIC and flyback configura-
tions. Switch current is also selectable, permitting the use
of smaller inductors in low-current applications. The linear
regulator also acts as a filter to reduce output ripple voltage.
The MAX1672 has a low 85μA quiescent supply current, which
is further reduced to 0.1μA in logic-controlled shutdown. The
output voltage is disconnected from the input in shutdown.
The MAX1672 also has a PGI/
PGO
low-battery detector.
The MAX1672 comes in a 16-pin QSOP package (same size
as a standard 8-pin SO). For a larger device that delivers more
output current, refer to the MAX710/MAX711. The preassem-
bled MAX1672 evaluation kit is available to speed designs.
________________________Applic ations
Single-Cell, Lithium-Powered
Portable Devices
3.3V and Other Low-Voltage
Systems
Digital Cameras
2-Cell to 4-Cell AA Alkaline
Hand-Held Equipment
Battery-Powered Devices
with AC Input Adapters
____________________________Features
o
Step-Up/Down Voltage Conversion
o
1.8V to 11V Input Range
o
3.3V/5V or Adjustable Output Voltage Range
o
Output Current:
300mA at 5V (V
IN
≥
2.5V)
150mA at 5V (V
IN
≥
1.8V)
o
Smaller Inductor than SEPIC and Flybacks
o
Load Disconnects from Input in Shutdown
o
Supply Current from Battery:
85μA (No-Load)
0.1μA (Shutdown)
o
PGI/
PGO
Low-Battery Comparator
o
16-Pin QSOP Package
(same footprint as 8-pin SO)
o
No External FETs Required
o
Thermal and Short-Circuit Protection
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.
M
S tep-Up/Down DC-DC Converter
in QS OP Pac kage
________________________________________________________________ Maxim Integrated Products
1
19-1307; Rev 0a; 11/97
EVALUATION KIT
AVAILABLE
______________Ordering Information
*
Dice are tested at T
A
= +25°C.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
LX
LX
PGND
GND
REF
IN
PS
FB
OUT
TOP VIEW
MAX1672
QSOP
PGND
ONA
ILIM
PGO
PGI
3/5
ONB
__________________Pin Configuration
MAX1672
IN
ONA
ONB
3/5
ILIM
PGI
OFF
OFF
5V
0.8A
ON
PGND
GND
PS
3.3V/5V
OUTPUT
INPUT
1.8V TO11V
LOW-BATTERY
DETECTOR
OUTPUT
OUT
PG0
FB
REF
LX
ON
3.3V
0.5A
__________Typic al Operating Circ uit
PART
MAX1672C/D
MAX1672EEE
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
Dice*
16 QSOP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1672C/D 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 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
MAX1672EEE 功能描述:直流/直流開關(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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