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參數資料
| 型號： | TPS61081DRCTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, 1 MM HEIGHT, GREEN, PLASTIC, QFN-10 |
| 文件頁數： | 12/25頁 |
| 文件大小： | 925K |
| 代理商： | TPS61081DRCTG4 |
www.ti.com
L
1
10
SW
Charge
Pump
2
VIN
EN
SC
Ramp
Generator
Oscillator
FB
5
Clamp
MUX
BandGap
1.229V
SS
EN
PWM
Control
Current
Sensor
Error
Amplifer
OVP
Thermal
Shutdown
OVP
ShortCircuit
9
OUT
FSW
7
PGND
8
SC
OVP
1.2MHz
600KHz
6
3
GND
4
+
FB
R1
R2
R3
C3
C2
Cs
C1
L1
SLVS644B – FEBRUARY 2006 – REVISED JANUARY 2007
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
The inductor is connected between this pin and the SW pin. This pin connects to the source of the
L
1
I
isolation FET as well. Minimize trace area at this pin to reduce EMI.
Input pin to the IC. It is the input to the boost regulator, and also powers the IC circuit. It is connected to
VIN
2
I
the drain of the isolation FET as well.
Enable pin. When the voltage of this pin falls below enable threshold for more than 74ms, the IC turns off
EN
6
I
and consumes less than 2
A current.
GND
4
Signal ground of the IC
Power ground of the IC. It is connected to the source of the PWM switch. This pin should be made very
PGND
8
close to the output capacitor in layout.
Voltage feedback pin for the output regulation. It is regulated to an internal reference voltage. An external
FB
5
I
voltage divider from the output to GND with the center tap connected to this pin programs the regulated
voltage. This pin can also be connected to a low side current sense resistor to program current regulation.
Output of the boost regulator. When the output voltage exceeds the 27V overvoltage protection (OVP)
OUT
9
O
threshold, the PWM switch turns off until Vout drops 0.7V below the overvoltage threshold.
SW
10
I
Switching node of the IC. Connect the inductor between this pin and the L pin.
SS
3
I
Soft start programming pin. A capacitor between the SS pin and GND pin programs soft start timing.
Switching frequency selection pin. Logic high on the pin selects 1.2MHz, while logic low reduces the
FSW
7
I
frequency to 600KHz for better light load efficiency.
The thermal pad should be soldered to the analog ground. If possible, use thermal via to connect to
Thermal Pad
–
ground plane for ideal power dissipation.
FUNCTIONAL BLOCK DIAGRAM
2
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相關代理商/技術參數 |
參數描述 |
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| TPS61081EVM-147 | 功能描述:電源管理IC開發工具 TPS61081-147 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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| TPS61085DGK | 制造商:TI 制造商全稱:Texas Instruments 功能描述:650 kHz/1.2 MHz, 18.5 V STEP-UP DC-DC CONVERTER |
| TPS61085DGKR | 功能描述:直流/直流開關調節器 650kHz 1.2MHz Step- Up DC-DC 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 |
| TPS61085DGKRG4 | 功能描述:直流/直流開關調節器 650kHz 1.2MHz Step- Up DC-DC 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 |
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