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參數(shù)資料
| 型號(hào)： | S-8520A28MC-AVN-T2 |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 216 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數(shù)： | 1/43頁 |
| 文件大?。?/td> | 488K |
| 代理商： | S-8520A28MC-AVN-T2 |
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Rev.7.5_00
STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE
SWITCHING REGULATOR CONTROLLER
S-8520 / 8521 Series
Seiko Instruments Inc.
1
The S-8520 / 8521 Series consists of CMOS step-down
switching regulator-controllers with PWM control (S-8520
Series) and PWM / PFM switching control (S-8521
Series).
These devices contain a reference voltage
source, oscillation circuit, error amplifier, and other
components.
The S-8520 Series provides low-ripple power, high-
efficiency, and excellent transient characteristics thanks to
a PWM control circuit capable of varying the duty ratio
linearly from 0% up to 100%. The series also contains
an error amplifier circuit as well as a soft-start circuit that
prevents overshoot at startup.
The S-8521 Series works with either PWM control or PFM
control, and can switch from one to the other. It normally
operates using PWM control with a duty ratio of 25 to
100%, but under a light load, it automatically switches to
PFM control with a duty ratio of 25%.
This series
ensures high efficiency over a wide range of conditions,
from standby mode to operation of peripheral equipment.
With the addition of an external Pch power MOS FET or
PNP transistor, a coil, capacitors, and a diode connected
externally, these ICs can function as step-down switching
regulators. They serve as ideal power supply units for
portable devices when coupled with the SOT-23-5 small
package, providing such outstanding features as low
current
consumption.
Since
this
series
can
accommodate an input voltage of up to 16 V, it is also
ideal when operating via an AC adapter.
Features
Low current consumption
During operation: 60
A max.
(A, B types)
21
A max.
(C, D types)
100
A max. (E, F types)
During shutdown: 0.5
A max.
Input voltage:
2.5 to 16 V (B, D, F types)
2.5 to 10 V (A, C, E types)
Output voltage:
Selectable between 1.5 V and 6.0 V in 0.1 V step
Duty ratio:
0 to 100% PWM control (S-8520 Series)
25 to100% PWM / PFM switching control (S-8521 Series)
The only peripheral components that can be used with this IC are a Pch power MOS FET or PNP
transistor, a coil, a diode, and capacitors (If a PNP transistor is used, a base resistance and a capacitor will
also be required).
Oscillation frequency:
180 kHz typ.
(A, B types)
60 kHz typ.
(C, D types)
300 kHz typ.
(E, F types)
Soft-start function:
8 ms. typ.
(A, B types)
12 ms. typ.
(C, D types)
4.5 ms. typ.
(E, F types)
With a shutdown function
With a built-in overload protection circuit
Overload detection time:
4 ms. typ. (A type)
14 ms. typ.
(C type)
2.6 ms. typ.
(E type)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8520A28MC-AVNT2G | 功能描述:DC/DC 開關(guān)控制器 2.8V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A29MC-ARO-T2 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS |
| S-8520A29MC-AVO-T2 | 功能描述:DC/DC 開關(guān)控制器 2.9V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A29MC-AVOT2G | 功能描述:DC/DC 開關(guān)控制器 2.9V Step-Down PWM RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| S-8520A30MC-ARP-T2 | 制造商:SII 制造商全稱:Seiko Instruments Inc 功能描述:PWM CONTROL & PWM/PFM CONTROL STEP-DOWN SWITCHING REGULATOR-CONTROLLERS |
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