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參數(shù)資料
| 型號(hào)： | MAX1672EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Step-Up/Down DC-DC Converter in QSOP Package |
| 中文描述： | 1.1 A SWITCHING REGULATOR, PDSO16 |
| 封裝： | 0.150 INCH, QSOP-16 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 143K |
| 代理商： | MAX1672EEE |
M
S tep-Up/Down DC-DC Converter
in QS OP Pac kage
_______________________________________________________________________________________
9
Capac itor S elec tion
The equivalent series resistance (ESR) of both bypass
and filter capacitors affects efficiency and output rip-
ple. Output voltage ripple is the product of peak induc-
tor current and filter capacitor ESR. Use low-ESR
capacitors for best performance, or connect two or
more filter capacitors in parallel.
A 100μF, 16V, input bypass capacitor (C1) with low
ESR reduces peak battery currents and reflected noise
due to inductor current ripple. Smaller ceramic capaci-
tors may also be used for light loads or in applications
that can tolerate higher input ripple.
A 100μF, 16V, surface-mount (SMT) tantalum PS filter
capacitor (C2) with 0.1
ESR typically exhibits 20mV
output ripple (at OUT) when stepping up from 2V to 5V
at 100mA load. Smaller capacitors (down to 10μF with
higher ESR) are acceptable for light loads or in applica-
tions that can tolerate higher output ripple.
Only 4.7μF is needed at OUT (C4) to maintain linear
regulator stability. During boost operation, this capaci-
tor reduces output voltage spikes from the step-up con-
verter by forming an R-C lowpass filter along with the
P-channel MOSFET on-resistance. Output ripple can be
further reduced by increasing C4.
See Tables 4 and 5 for a list of suggested capacitors
and suppliers.
Diode S elec tion
The MAX1672’s high switching frequency demands a
high-speed rectifier. Schottky diodes, such as the
1N5817 or MBRS130T3, are recommended. Make sure
the diode’s current rating exceeds the maximum load
current. See Tables 4 and 5 for a list of suggested
diodes and suppliers.
Table 3. Suggested Inductor Values
Table 4. Suggested Components
ILIM
INDUCTOR VALUE
(μH)
0 (5V)
0 (0.5A)
10 to 22
0 (5V)
1 (0.8A)
10
3/
5
1 (3.3V)
0 (0.5A)
10
1 (3.3V)
1 (0.8A)
4.7 to 10
INDUCTORS
Sumida
CD43-100 (1.04A, 0.182
)
CD54-100 (1.44A, 0.100
)
CDRH73-100 (1.68A, 0.072
)
Coilcraft
DT1608C-103 (0.7A, 0.095
)
L1
10μH
CAPACITORS
AVX
TPSE Series
Sprague
593D or 595D Series
Tantalum
DIODES
Motorola
MBRS130LT3 (1.0A, 30V)
MBR0520LT3 (0.5A, 20V)
Schottky
1N5817 Equivalent
International Rectifier
10BQ40 (1.0A, 40V)
Table 5. Component Suppliers
PHONE
AVX
(803) 946-0690
Coilcraft
(847) 639-6400
SUPPLIER
International
Rectifier
(310) 322-3331
Motorola
(602) 303-5454
FAX
(803) 626-3123
(847) 639-1469
(310) 322-3332
(602) 994-6430
Sanyo
(619) 661-6835
(619) 661-1055
Sprague
(603) 224-1961
(603) 224-1430
Sumida
(847) 956-0666
(847) 956-0702
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| MAX1672EVKIT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Evaluation Kit for the MAX1672 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 |
| MAX1673ESA | 功能描述:電荷泵 Regulated 125mA Charge Pump RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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