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參數資料
| 型號： | TPS54225PWP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | GREEN, PLASTIC, HTSSOP-14 |
| 文件頁數： | 20/23頁 |
| 文件大小： | 733K |
| 代理商： | TPS54225PWP |
SW
VBST
EN
VO
VFB
GND
PGND
VO
4
6
9
10
11
1
2
7
12
VIN
SS
VIN
VREG5
EN
Logic
UV
OV
Protection
Logic
Ref
SS
UV
OV
UVLO
Softstart
SS
REF
TSD
Ref
VREG5
5
PG
1mF
13
8
VCC
Ceramic
Capacitor
3
SGND
PGND
VCC
+20%
-10%
Ref
VREG5
Control logic
1 shot
XCON
-30%
OCP
SW
PGND
ZC
SW
PGND
14
VREG5
SLVSA15C
– OCTOBER 2009 – REVISED FEBRUARY 2011
Functional Block Diagram
OVERVIEW
The TPS54225 is a 2-A synchronous step-down (buck) converter with two integrated N-channel MOSFETs. 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 TPS54225 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.
At the beginning of each cycle, the high-side MOSFET is turned on. This MOSFET is turned off after internal one
6
2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TPS54225
相關PDF資料 |
PDF描述 |
|---|---|
| TPS54225PWPR | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| TPS54225TPWPRQ1 | SWITCHING REGULATOR, PDSO14 |
| TPS54226PW | |
| TPS54227DDA | 4.7 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS54233DG4 | 2 A SWITCHING REGULATOR, 390 kHz SWITCHING FREQ-MAX, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS54225PWP | 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 |
| TPS54225PWPR | 功能描述:直流/直流開關轉換器 4.5-18V 2A Sync Step Down Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| TPS54225-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 18V Input, 2-A Synchronous Step-Down SWIFTTM Converter |
| TPS54225TPWPRQ1 | 功能描述:直流/直流開關調節器 4.5V-18Vin,2A Sync Step-Down DCAP2 Mode RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54226 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:4.5V to 18V Input 2-A Synchronous Step-Down SWIFTTM Converter with Light Load Efficiency |
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