- 您現在的位置：買賣IC網 > PDF目錄98282 > TPS5420MDREP (TEXAS INSTRUMENTS INC) 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數資料
| 型號： | TPS5420MDREP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數： | 20/23頁 |
| 文件大小： | 658K |
| 代理商： | TPS5420MDREP |
www.ti.com
APPLICATION INFORMATION
VIN
UVLO
ENABLE
Thermal
Protection
Reference
Overcurrent
GateDrive
Oscillator
Ramp
Generator
VREF
PH
ENA
GND
SHDN
BOOT
Z1
Z2
SHDN
VIN
SHDN
HICCUP
SHDN
NC
FeedForward
BOOT
NC
VIN
VOUT
5 A
1.221VBandgap
SlowStart
Boot
Regulator
Error
Amplifier
Gain=25
PWM
Comparator
Protection
Gate
Driver
Control
VSENSE
DETAILED DESCRIPTION
Oscillator Frequency
Voltage Reference
Enable (ENA) and Internal Slow Start
SLVS717 – DECEMBER 2006
FUNCTIONAL BLOCK DIAGRAM
The internal free-running oscillator sets the PWM switching frequency at 500 kHz. The 500-kHz switching
frequency allows less output inductance for the same output ripple requirement, resulting in a smaller output
inductor.
The voltage reference system produces a precision reference signal by scaling the output of a
temperature-stable bandgap circuit. The bandgap and scaling circuits are trimmed during production testing to
an output of 1.221 V at room temperature.
The ENA pin provides electrical on/off control of the regulator. Once the ENA pin voltage exceeds the threshold
voltage, the regulator starts operation and the internal slow start begins to ramp. If the ENA pin voltage is pulled
below the threshold voltage the regulator stops switching and the internal slow start resets. Connecting the pin
to ground or to any voltage less than 0.5 V disables the regulator and activates the shutdown mode. The
quiescent current of the TPS5420 in shutdown mode is typically 18
A.
The ENA pin has an internal pullup current source, allowing the user to float the ENA pin. If an application
requires controlling the ENA pin, use open-drain or open-collector output logic to interface with the pin. To limit
the start-up inrush current, an internal slow start circuit is used to ramp up the reference voltage from 0 V to its
final value, linearly. The internal slow start time is 8 ms, typically.
6
相關PDF資料 |
PDF描述 |
|---|---|
| TPS54225PWP | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
| 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS5420MDREPG4 | 功能描述:直流/直流開關調節器 EP 2A Wide-Inp-Range StepDwn SWIFT Cnvrtr 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 |
| TPS5420-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-A WIDE-INPUT-RANGE STEP-DOWN SWIFTa?￠ CONVERTER |
| TPS5420QDRQ1 | 功能描述:直流/直流開關調節器 2A Wide-Input-Range Step-Down Converter 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 |
| TPS54218 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.95 V to 6 V Input 2 A Output 2MHz Synchronous Step Down Switcher With Integrated FETs (SWIFT) |
| TPS54218_12 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.95 V to 6 V Input, 2 A Output, 2MHz, Synchronous Step Down |
發布緊急采購，3分鐘左右您將得到回復。