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參數(shù)資料
| 型號： | MAX886_EUK33 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23 |
| 中文描述： | 低噪聲，低壓差，150mA的線性穩(wěn)壓器采用SOT23 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 257K |
| 代理商： | MAX886_EUK33 |
M
Wireless and S atellite Handset
Power-Management ICs
______________________________________________________________________________________
17
faster, such as the MUR series, are acceptable. Ensure
that the diode’s peak current rating exceeds the peak
current (1A), and that its breakdown voltage exceeds
V
BATT
. Schottky diodes are preferred for heavy loads
due to their low forward voltage, especially in low-volt-
age applications.
Capac itor S elec tion
Choose filter capacitors to service input and output
peak currents with acceptable voltage ripple. The
capacitor’s equivalent series resistance (ESR) is a
major contributor to ripple; therefore, low-ESR capaci-
tors are recommended for OUT1–OUT5. A tantalum
capacitor is recommended for OUT0 (refer to Figures
2a and 2b, and Table 6).
The input filter capacitor reduces peak currents drawn
from the power source, and reduces noise and voltage
ripple on the input, which are caused by the circuit’s
switching action. Since the current from the battery is
interrupted each time the PMOS switch opens, pay spe-
cial attention to the ripple current rating of the input filter
capacitor and use a low-ESR capacitor. Choose input
capacitors with working voltage ratings higher than the
maximum input voltage. Input capacitors prevent spikes
and ringing on the power source from obscuring the
current-feedback signal and causing jitter.
Bypass REF with 0.22μF to GND. The capacitor should
be placed within 0.2 inches of the IC, next to REF, with
a direct trace to GND.
Table 6. OUT0 and OUT4 Regulator
Component Recommendations
Table 7. Component Suppliers
Layout Considerations
High-frequency switching regulators are sensitive to PC
board layout. Poor layout introduces switching noise
into the current and voltage-feedback signals, resulting
in jitter, instability, or degraded performance. Place the
anode of the Schottky diode and the ground pins of the
input and output capacitors close together, and route
them to a common “star-ground” point. Place compo-
nents and route ground paths so as to prevent high
currents from causing large voltage gradients between
the ground pin of the output filter capacitor, the con-
troller IC, and the reference bypass capacitor. Keep
the extra copper on the component and solder sides of
the PC board rather than etching it away, and connect
it to ground for use as a pseudo-ground plane. Refer to
the MAX886/MAX888 evaluation kit for a two-layer PC
board layout example.
925
670
535
375
0.22
0.33
0.47
1
10
15
22
33
10
15
22
33
C12
(μF)
f
OSC
(kHz)
C6
(μF)
L1
(μH)
10
15
22
33
C11
(μF)
AVX
Coilcraft
Coiltronics
Dale
Internal Rectifier
Motorola
Sanyo
Sprague
Sumida
803-946-0690
847-639-6400
516-241-7876
605-668-4131
310-322-3331
602-303-5454
619-661-6835
408-988-8000
847-956-0666
803-626-3123
847-639-1469
516-241-9339
605-665-1627
310-322-3332
602-994-6430
619-661-1055
408-970-3950
847-956-0702
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8873REUK | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX8873REUK+T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8873REUK-T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8873SEUK | 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product 制造商:Rochester Electronics LLC 功能描述: |
| MAX8873SEUK+ | 制造商:Maxim Integrated Products 功能描述:LDO REG 1.25V TO 6.5V/2.84V 0.12A 5PIN SOT-23 - Rail/Tube |
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