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參數(shù)資料
| 型號： | TPS54226PW |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 封裝： | PACKAGE-14 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 501K |
| 代理商： | TPS54226PW |
SW
VBST
EN
VO
VFB
GND
PGND
VO
4
6
9
10
11
1
2
7
12
VIN
SS
VIN
VREG5
EN
Logic
SW
PGND
UV
OV
Protection
Logic
Ref
SS
UV
OV
UVLO
Softstart
SS
REF
TSD
Ref
VREG5
5
PG
13
8
VCC
Ceramic
Capacitor
3
GND
PGND
VCC
+20%
-10%
Ref
SW
PGND
ZC
GND
14
-30%
PGND
VREG5
ControlLogic
OCP
SLVSA14B – OCTOBER 2009 – REVISED JUNE 2010
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
A.
Block diagram shown is for PWP 14 pin package. QFN 16 pin package block diagram is identical except for pin out.
OVERVIEW
The TPS54226 is a 2-A synchronous step-down (buck) converter with two integrated N-channel MOSFETs and
Auto-Skip Eco-Mode to improve light lode efficiency . It operates using D-CAP2 mode control. The fast
transient response of D-CAP2 control reduces the output capacitance required to meet a specific level of
performance. Proprietary internal circuitry allows the use of low ESR output capacitors including ceramic and
special polymer types.
DETAILED DESCRIPTION
PWM Operation
The main control loop of the TPS54226 is an adaptive on-time pulse width modulation (PWM) controller that
supports a proprietary D-CAP2 mode control. D-CAP2 mode control combines constant on-time control with
an internal compensation circuit for pseudo-fixed frequency and low external component count configuration with
both low ESR and ceramic output capacitors. It is stable even with virtually no ripple at the output.
6
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54226
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54226PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4.5-18V 2A Sync Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54226PWP | 制造商:Texas Instruments 功能描述:DC/DC STEP DOWN CONVERTER IC 700kHz HT 制造商:Texas Instruments 功能描述:IC, SYNC STEP-DOWN DC/DC CONV, HTSSOP-14 |
| TPS54226PWPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4.5-18V 2A Sync Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54226RGTR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 4.5-18V Inp,2A Synch Step Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| TPS54226RGTT | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 4.5-18V Inp,2A Synch Step Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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