- 您現在的位置：買賣IC網 > PDF目錄98285 > TPS62690YFFR (TEXAS INSTRUMENTS INC) 0.5 A SWITCHING REGULATOR, 4400 kHz SWITCHING FREQ-MAX, BGA6 PDF資料下載
參數資料
| 型號： | TPS62690YFFR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.5 A SWITCHING REGULATOR, 4400 kHz SWITCHING FREQ-MAX, BGA6 |
| 封裝： | GREEN, DSBGA-6 |
| 文件頁數： | 9/27頁 |
| 文件大小： | 870K |
| 代理商： | TPS62690YFFR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第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頁第27頁
PFMModeatLightLoad
PFMRipple
PWMModeatHeavyLoad
NominalDCOutputVoltage
(
)
IN
OUT
DS(on)
L
V min = V
max + I
max
R
max + R
SLVS965
– MARCH 2011
Figure 35. Operation in PFM Mode and Transfer to PWM Mode
MODE SELECTION
The MODE pin allows to select the operating mode of the device. Connecting this pin to GND enables the
automatic PWM and power-save mode operation. The converter operates in regulated frequency PWM mode at
moderate to heavy loads and in the PFM mode during light loads, which maintains high efficiency over a wide
load current range.
Pulling the MODE pin high forces the converter to operate in the PWM mode even at light load currents. The
advantage is that the converter modulates its switching frequency according to a spread spectrum PWM
modulation technique allowing simple filtering of the switching harmonics in noise-sensitive applications. In this
mode, the efficiency is lower compared to the power-save mode during light loads.
For additional flexibility, it is possible to switch from power-save mode to PWM mode during operation. This
allows efficient power management by adjusting the operation of the converter to the specific system
requirements.
LOW DROPOUT, 100% DUTY CYCLE OPERATION
The device starts to enter 100% duty cycle mode once input and output voltage come close together. In order to
maintain the output voltage, the P-channel MOSFET is turned on 100% for one or more cycles.
With further decreasing VIN the high-side switch is constantly turned on, thereby providing a low input-to-output
voltage difference. This is particularly useful in battery-powered applications to achieve longest operation time by
taking full advantage of the whole battery voltage range.
The minimum input voltage to maintain regulation depends on the load current and output voltage, and can be
calculated as:
(1)
With:
IOUTmax = Maximum output current, plus inductor ripple current.
RDS(on)max = Maximum P-channel MOSFET RDS(on).
RL = Inductor DC resistance.
VOUTmax = Nominal output voltage, plus maximum output voltage tolerance.
2011, Texas Instruments Incorporated
17
相關PDF資料 |
PDF描述 |
|---|---|
| TPS62691YFFT | 0.6 A SWITCHING REGULATOR, 4400 kHz SWITCHING FREQ-MAX, BGA6 |
| TPS62751DSKR | 1.8 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS63000IDRCRQ1 | 2.1 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS65011RGZT | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC48 |
| TPS65023QRHARQ1 | POWER SUPPLY SUPPORT CKT, PQCC40 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS62690YFFT | 功能描述:直流/直流開關轉換器 500mA,4MHz,2.85Vout Hi-Eff St-Dwn Cnvrtr 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 |
| TPS62691EVM-076 | 功能描述:電源管理IC開發工具 TPS62691 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 |
| TPS62692EVM-076 | 制造商:Texas Instruments 功能描述:TPS62692EVM-076 EVALUATION MODULE |
| TPS62692YFDR | 制造商:Texas Instruments 功能描述: |
| TPS62693YFDR | 功能描述:直流/直流開關轉換器 800-mA 3-MHz Hi-Eff SD Cnvtr 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 |
發布緊急采購，3分鐘左右您將得到回復。