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參數(shù)資料
| 型號(hào)： | MAX710ESE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.3V/5V or Adjustable, Step-Up/Down DC-DC Converters |
| 中文描述： | 0.7 A SWITCHING REGULATOR, PDSO16 |
| 封裝： | 0.150 INCH, MS-012C, SOIC-16 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 140K |
| 代理商： | MAX710ESE |
M
3.3V /5V or Adjustable,
S tep-Up/Down DC-DC Converters
10
______________________________________________________________________________________
where V
LBT
is the desired threshold of the low-battery
detector and V
LBI-
is the voltage applied to the invert-
ing input of the low-battery comparator. Since LBI cur-
rent is less than 50nA, R3 and R4 can be large
(typically 100k
to 1M
), minimizing input supply load-
ing. If the low-battery comparator is not used, connect
LBI+ to PS and LBI- to REF, leaving LBO unconnected.
Induc tor S elec tion
A 22μH inductor value performs well in most
MAX710/MAX711 applications. The inductance value is
not critical, however, since the MAX710/MAX711 work
with inductors in the 18μH to 100μH range. Smaller
inductance values typically offer a smaller size for a
given series resistance, allowing the smallest overall
circuit dimensions. Circuits using larger inductance val-
ues exhibit higher output current capability and larger
physical dimensions for a given series resistance. The
inductor’s incremental saturation current rating should
be greater than the peak switch-current limit, which is
1.5A for ILIM = GND and 0.8A for ILIM = PS. However,
it is generally acceptable to bias most inductors into
saturation by as much as 20%, although this slightly
reduces efficiency. The inductor’s DC resistance signif-
icantly affects efficiency. See Tables 2 and 3 for a list of
suggested inductors and suppliers.
Capac itor S elec tion
A 100μF, 16V, 0.1
equivalent series resistance (ESR),
surface-mount tantalum (SMT) output filter capacitor,
C2, typically exhibits 50mV output ripple when stepping
up from 2V to 5V at 100mA. Smaller capacitors (down
to 10μF with higher ESRs) are acceptable for light loads
or in applications that can tolerate higher output ripple.
The ESR of both bypass and filter capacitors affects
efficiency and output ripple. Output voltage ripple is the
product of the peak inductor current and the output
capacitor’s ESR. Use low-ESR capacitors for best per-
formance, or connect two or more filter capacitors in
parallel. Low-ESR, SMT capacitors are currently avail-
able from Sprague (595D series) and AVX (TPS series).
Sanyo OS-CON organic-semiconductor through-hole
capacitors also exhibit very low ESR and are especially
useful for operation at cold temperatures. The output
capacitor, C3, needs to be only 4.7μF to maintain linear
regulator stability. See Tables 2 and 3 for a list of sug-
gested capacitors and suppliers.
Rec tifier Diode
For optimum performance, use a switching Schottky
diode. Refer to Tables 2 and 3 for the suggested diode
and supplier.
__________Applic ations Information
The MAX710/MAX711 high-frequency operation makes
PC layout important for minimizing ground bounce and
noise. Keep the IC’s GND pin and the ground leads of
C1 and C2 (Figure 1) less than 0.2in. (5mm) apart. Also
keep all connections to the FB and LX pins as short as
possible. To maximize output power and efficiency and
minimize output ripple voltage, use a ground plane and
solder the IC’s GND pin directly to the ground plane.
4.7μF, 16V tantalum capacitor
Sprague 595D475X0016A2T
RECTIFIERS (D1)
Schottky diode
Motorola MBRS130T3
Coilcraft DO33-08P-223
INDUCTORS (L1)
Sumida CD75-220 (1.5A),
CDRH-74-220 (1.23A), or
CD54-220
CAPACITORS
100μF, 16V low-ESR tantalum capacitor
AVX TPSE107M016R0100 or
Sprague 593D107X0016E2W
Table 2. Component Selection
Table 3. Component Suppliers
(803) 626-3123
(803) 946-0690
FAX
AVX
SUPPLIER
PHONE
(847) 639-1469
(847) 639-6400
Coilcraft
(602) 994-6430
(602) 303-5454
(603) 224-1430
(603) 224-1961
Sprague
Motorola
(847) 956-0702
(847) 956-0666
Sumida
___________________Chip Information
TRANSISTOR COUNT: 661
SUBSTRATE CONNECTED TO GND
(619) 661-1055
(619) 661-6835
Sanyo
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX710ESE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5V or Adjustable Step-Up 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 |
| MAX710ESE+ | 制造商:Maxim Integrated Products 功能描述:CONVERTOR DC/DC ((NW)) |
| MAX710ESE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5V or Adjustable Step-Up 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 |
| MAX710ESE-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/5V or Adjustable Step-Up 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 |
| MAX710EVKIT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Evaluation Kit for the MAX710 MAX711 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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