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| 型號(hào)： | S-8340B00AFT-T2-U |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 690 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | HALOGEN FREE AND LEAD FREE, TSSOP-8 |
| 文件頁數(shù)： | 1/55頁 |
| 文件大小： | 740K |
| 代理商： | S-8340B00AFT-T2-U |
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S-8340/8341 Series
www.sii-ic.com
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM
SWITCHABLE SWITCHING REGULATOR CONTROLLER
Seiko Instruments Inc., 1999-2010
Rev.4.0_00
Seiko Instruments Inc.
1
The S-8340/8341 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, oscillation circuit, error amplifier, phase compensation circuit, PWM control circuit (S-8340 Series), and PWM/PFM
switching control circuit (S-8341 Series).
Since the oscillation frequency is a high 300 kHz or 600 kHz, with the addition of a small external part, the S-8340/8341
Series functions as a highly efficient step-up switching regulator with a high output current. The speed of the output stage is
enhanced so that the N-channel power MOS with a low on-resistance can be switched quickly.
The S-8340 Series realizes low ripple, high efficiency, and excellent transient characteristics thanks to a PMW control circuit
capable of varying the duty ratio linearly from 0 to 82%, optimized error amplifier, and phase compensation circuit.
The S-8341 Series contains a PWM/PFM switching control circuit so that it operates using PWM control with a duty ratio of
27% or higher and using PFM control with a duty ratio of lower than 27% to ensure high efficiency in all load ranges.
These S-8340/8341 Series serve as ideal main power supply units for portable devices when coupled with the 8-Pin TSSOP
package and high oscillation frequencies.
Features
Oscillation frequency :
600 kHz (A and B types), 300 kHz (C and D types).
Output voltage :
Selectable in 0.1 V steps between 2.5 to 6.0 V (output voltage fixed output type)
Output voltage accuracy : ±2.0%
Output voltage external setting (FB) type available. FB terminal voltage (V
FB) 1.0 V
External parts :
Coil, diode, capacitors (3), transistor, and resistor only
Duty ratio :
0 to 82% (typ.) PWM control (S-8340 Series)
27 to 82% (typ.) PWM/PFM switching control (S-8341 Series A and B types)
21 to 82% (typ.) PWM/PFM switching control (S-8341 Series C and D types)
Low-voltage operation:
Oscillation guaranteed to start when VDD = 0.9 V
Built-in current limit circuit: Can be set with an external resistor (R
SENSE)
Soft-start function set by an external capacitor (C
SS)
Shutdown function
Lead-free, Sn 100%, halogen-free*1
*1. Refer to “
Product Name Structure” for details.
Applications
Power supplies for portable equipments such as PDAs, electronic notebooks, and cellular phones
Power supplies for audio equipments such as portable CD players, portable MD players, and headphone stereos
Main or local power supplies for notebook PCs and peripherals
Constant voltage power supplies for cameras, VCRs, and communication devices
Package
8-Pin TSSOP
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S-8340C25AFT-T2 | 功能描述:DC/DC 開關(guān)控制器 2.5V Step-Up 2.0% 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-8340C25AFT-T2-G | 功能描述:DC/DC 開關(guān)控制器 2.5V Step-Up 2.0% 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-8340C30AFT-T2 | 功能描述:DC/DC 開關(guān)控制器 3.0V Step-Up 2.0% 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-8340C30AFT-T2-G | 功能描述:DC/DC 開關(guān)控制器 3.0V Step-Up 2.0% 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-8340C33AFT-T2 | 功能描述:DC/DC 開關(guān)控制器 3.3V Step-Up 2.0% 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 |
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