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參數(shù)資料
| 型號： | P95020NQG |
| 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(shù)： | 166/169頁 |
| 文件大?。?/td> | 4297K |
| 代理商： | P95020NQG |
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IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
96
2011 Integrated Device Technology, Inc.
Soft-Start Sequence
There is a 50 s delay after the ENABLE bit is set and
then an internal counter starts the soft-start. The soft-start
ramp-up time is 80 s/volt from zero to the programmed
output voltage setting. Once the soft-start sequence is
initiated, any changes to the values in the Output Voltage
Register are ignored until the Soft Start sequence is
complete.
Current Limit Protection
The Buck Converter includes pulse by pulse peak current
limiting circuitry for over-current conditions. The limit can
be set at various percentages of the maximum setting
(See Table 149). During an over-current condition, the
output voltage is allowed to drop below the specified
voltage and will be indicated by the status of the PGOOD
bit. When the over-current state is ended, the output
returns to normal operation.
Short Circuit Protection
The Buck Converter includes short-circuit protection
circuitry. When a short circuit occurs, the output will be
latched into a disabled mode and a fault will be indicated
in the SC_FAULT bit. The local ENABLE bit must be first
toggled LOW and then back to HIGH again to clear the
short circuit latch. Any subsequent Short Circuit will
override the local ENABLE bit setting and re-latch the
output to a disabled mode.
Buck Regulators – Application
Figure 27. Buck Regulators Application Diagram
Input Capacitor
All input capacitors should be located as physically close
as possible to the power pin (VIN) and power ground
(GND). Ceramic capacitors are recommended for their
higher current operation and small profile. Also, ceramic
capacitors are inherently capable to withstand input
current surges from low impedance sources such as
batteries in portable devices than are tantalum capacitors.
Typically, 10V or 16V rated capacitors are required. See
Table 156 and Table 157 for recommended external
components.
Output Capacitor
For proper load voltage regulation and operational stability,
a capacitor is required on the output of each buck. The
output capacitor connection to the ground pin
(BUCKXX00_X_GND) should be made as directly as
practically possible for maximum device performance.
Since the bucks have been designed to function with very
low ESR capacitors, a ceramic capacitor is recommended
for best performance. An additional decoupling capacitor
on the Buck output in parallel to the larger COUT is also
recommended.
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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P95020NQG8 | 制造商:Integrated Device Technology Inc 功能描述:Power Management and Control 132-Pin QFN EP T/R 制造商:Integrated Device Technology Inc 功能描述:POWER MANAGEMENT AUDIO & CONTROL - Tape and Reel 制造商:Integrated Device Technology Inc 功能描述:Integrates Audio, LED B/Light Pwr Mgt |
| P95020ZDLLG | 制造商:Integrated Device Technology Inc 功能描述:124-LGA - Bulk |
| P95020ZDLLG8 | 制造商:Integrated Device Technology Inc 功能描述:124-LGA - Tape and Reel |
| P95020ZDNQG | 制造商:Integrated Device Technology Inc 功能描述:132-VFQFPN - Bulk |
| P95020ZDNQG8 | 制造商:Integrated Device Technology Inc 功能描述:132-VFQFPN - Tape and Reel |
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