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參數資料
| 型號： | P95020NQG8 |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132 |
| 封裝： | 10 X 10 MM, 0.85 MM HEIGHT, QFN-132 |
| 文件頁數： | 14/169頁 |
| 文件大小： | 4297K |
| 代理商： | P95020NQG8 |
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IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
110
2011 Integrated Device Technology, Inc.
Output Capacitor
For proper load voltage regulation and operational stability,
a capacitor is required on the BOOST5_OUT output. The
output capacitor connection to the ground pin
(BOOST5_GND) should be made as directly as practically
possible for maximum device performance. Since the
boost has been designed to function with very low ESR
capacitors, a ceramic capacitor is recommended with a
6.3V rating for best performance.
Inductor Selection
Inductor manufacturer’s specifications list both the
inductor DC current rating, which is a thermal limitation,
and the peak current rating, which is determined by the
saturation characteristics. The inductor should not show
any appreciable saturation under normal load conditions.
Some inductors may meet the peak and average current
ratings yet result in excessive losses due to a high DCR.
Always consider the losses associated with the DCR and
its effect on the total converter efficiency when selecting
an inductor.
Selecting the Schottky Diode
To ensure minimum forward voltage drop and no recovery,
high voltage Schottky diodes are considered the best
choice for the boost converters. The output diode is sized
to maintain acceptable efficiency and reasonable
operating junction temperature under full load operating
conditions. Forward voltage (VF) and package thermal
resistance (θJA) are the dominant factors to consider in
selecting a diode. Manufacturers’ datasheets should be
consulted to verify reliability under peak loading conditions.
The diode’s published current rating may not reflect actual
operating conditions and should be used only as a
comparative measure between similarly rated devices.
20V rated Schottky diodes are recommended for outputs
less than 15V, while 50V rated Schottky diodes are
recommended for outputs greater than 40V.
Recommended External Components
Table 172. Boost5 Recommended External Components
ID
QTY
Description
Part Number
Manufacturer
CIN
1
Capacitor, Ceramic, 22 F 6.3V, X5R
C0603X5R6R3-226MNE
Venkel
COUT
1
Capacitor, Ceramic, 22 F, 6.3V, X5R
C0603X5R6R3-226KNP
Venkel
L
1
Inductor, 2.2 H, 2.6A
CDRH3D23HPNP-2R2P
SUMIDA
D1
1
Diode, Schottky, 50V, 1 A
MSS1P5-E3/89A
Vishay/General Semiconductor
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