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參數(shù)資料
| 型號(hào)： | MAX8893AEWV+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA30 |
| 封裝： | 3 X 2.50 MM, 0.64 MM HEIGHT, ROHS COMPLIANT, WLP-30 |
| 文件頁數(shù)： | 41/51頁 |
| 文件大?。?/td> | 4976K |
| 代理商： | MAX8893AEWV+ |
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FPMIC for Multimedia Application Processor
in 2.5mm x 3.0mm WLP
MAX8893A/MAX8893B/MAX8893C
46 _____________________________________________________________________________________
Applications Information
Step-Down Converter
Input Capacitor
The input capacitor, CIN1, reduces the current peaks
drawn from the battery or input power source and reduc-
es switching noise in the IC. The impedance of CIN1 at
the switching frequency should be kept very low. Ceramic
capacitors with X5R or X7R temperature characteristics
are highly recommended due to their small size, low ESR,
and small temperature coefficients. Due to the step-down
converter’s fast soft-start, the input capacitance can be
very low. For most applications, a 2.2FF capacitor is suf-
ficient. Connect CIN1 as close as possible to the IC to
minimize the impact of PCB trace inductance.
For other input capacitors, use a 2.2FF ceramic capaci-
tor from IN2 to ground and a 2.2FF ceramic capacitor
from BATT to ground.
Output Capacitor
The output capacitor, CBUCK, is required to keep the
output voltage ripple small and to ensure regulation loop
stability. CBUCK must have low impedance at the switch-
ing frequency. Ceramic capacitors with X5R or X7R
temperature characteristics are highly recommended
due to their small size, low ESR, and small temperature
coefficients. Due to the unique feedback network, the
output capacitance can be very low. For most applica-
tions a 2.2FF capacitor is sufficient. For optimum load-
transient performance and very low output ripple, the
output capacitor value in FF should be equal to or larger
than the inductor value in FH.
Inductor Selection
The recommended inductor for the step-down converter
is from 1.0FH and 4.7FH. Low inductance values are
physically smaller, but require faster switching, resulting
in some efficiency loss. The inductor’s DC current rating
needs to be only 100mA greater than the application’s
maximum load current because the step-down converter
features zero current overshoot during startup and load
transients.
For output voltages above 2.0V, when light load efficien-
cy is important, the minimum recommended inductor is
2.2FH. For optimum voltage-positioning load transients,
choose an inductor with DC series resistance in the
50mω to 150mω range. To achieve higher efficiency at
heavy loads (above 200mA) or minimum load regulation
(but some transient overshoot), the inductor resistance
should be kept below 100mω. For light -oad applications
up to 200mA, much higher resistance is acceptable with
very little impact on performance. See Table 17 for some
suggested inductors.
Table 16. SVER
This register contains the MAX8893A/MAX8893B/MAX8893C version number.
REGISTER NAME
SVER
Register Pointer
0x46
Reset Value
N/A
Type
Read
Special Features
—
BIT
NAME
DESCRIPTION
DEFAULT VALUE
B7 (MSB)
—
Reserved for future use
—
B6
—
Reserved for future use
—
B5
—
Reserved for future use
—
B4
—
Reserved for future use
—
B3
—
Reserved for future use
—
B2
—
Reserved for future use
—
B1
SVER
00 = MAX8893A
01 = MAX8893B
10 = MAX8893C
—
B0 (LSB)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8893AEWV+T | 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Tape and Reel |
| MAX8893BEWV+T | 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Tape and Reel |
| MAX8893CEWV+ | 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Rail/Tube |
| MAX8893CEWV+T | 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Tape and Reel |
| MAX8895EVKIT+ | 功能描述:電池管理 EVKIT for MAX8895 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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