- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98262 > TLV62065DSGT (TEXAS INSTRUMENTS INC) 2 A SWITCHING REGULATOR, 3400 kHz SWITCHING FREQ-MAX, PDSO8 PDF資料下載
參數(shù)資料
| 型號(hào)： | TLV62065DSGT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 3400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 2 X 2 MM, 0.75 MM HEIGHT, PLASTIC, WSON-8 |
| 文件頁數(shù)： | 10/26頁 |
| 文件大?。?/td> | 1182K |
| 代理商： | TLV62065DSGT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當(dāng)前第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
I
RMSCout + Vout
1 *
Vout
Vin
L
1
2
3
SLVSAC4 – NOVEMBER 2010
www.ti.com
In case additional ceramic capacitors in the supplied system are connected to the output of the DC/DC converter,
the output capacitor COUT need to be decreased in order not to exceed the recommended effective capacitance
range. In this case a loop stability analysis must be performed as described later.
At nominal load current, the device operates in PWM mode and the RMS ripple current is calculated as:
(3)
Input Capacitor Selection
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is
required for best input voltage filtering and minimizing the interference with other circuits caused by high input
voltage spikes. For most applications a 10F ceramic capacitor is recommended. The input capacitor can be
increased without any limit for better input voltage filtering.
Take care when using only small ceramic input capacitors. When a ceramic capacitor is used at the input and the
power is being supplied through long wires, such as from a wall adapter, a load step at the output or VIN step on
the input can induce ringing at the VIN pin. This ringing can couple to the output and be mistaken as loop
instability or could even damage the part by exceeding the maximum ratings.
Table 3. List of Capacitors
CAPACITANCE
TYPE
SIZE [ mm3]
SUPPLIER
10mF
GRM188R60J106M
0603: 1.6 x 0.8 x 0.8
Murata
22mF
GRM188R60G226M
0603: 1.6 x 0.8 x 0.8
Murata
22F
CL10A226MQ8NRNC
0603: 1.6 x 0.8 x 0.8
Samsung
10F
CL10A106MQ8NRNC
0603: 1.6 x 0.8 x 0.8
Samsung
CHECKING LOOP STABILITY
The first step of circuit and stability evaluation is to look from a steady-state perspective at the following signal
Switching node, SW
Inductor current, IL
Output ripple voltage, VOUT(AC)
These are the basic signals that need to be measured when evaluating a switching converter. When the
switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the
regulation loop may be unstable. This is often a result of board layout and/or wrong L-C output filter
combinations. As a next step in the evaluation of the regulation loop, the load transient response is tested. The
time between the application of the load transient and the turn on of the P-channel MOSFET, the output
capacitor must supply all of the current required by the load. VOUT immediately shifts by an amount equal to
ΔI(LOAD) x ESR, where ESR is the effective series resistance of COUT. ΔI(LOAD) begins to charge or discharge CO
generating a feedback error signal used by the regulator to return VOUT to its steady-state value. The results are
most easily interpreted when the device operates in PWM mode at medium to high load currents.
During this recovery time, VOUT can be monitored for settling time, overshoot, or ringing; that helps evaluate
stability of the converter. Without any ringing, the loop has usually more than 45° of phase margin.
18
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s) :TLV62065
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TLV977-10CPFB | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| TLV987CPFB | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| TLV990-13PFB | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TLV990-13PFBG4 | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| TLV990-21PFB | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV62065EVM719 | 制造商:Texas Instruments 功能描述:TLV62065EVM719 |
| TLV62065EVM-719 | 功能描述:電源管理IC開發(fā)工具 TLV62065 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)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 |
| TLV62065-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:3-MHz 2-A Step-Down Converter in 2-mm x 2-mm SON Package |
| TLV62065TDSGRQ1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 AC 3MHz,2A SD 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 |
| TLV62080 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.2A High Efficient Step Down Converter in 2x2mm SON Package |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。