- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44549 > LM2645MTD/NOPB (NATIONAL SEMICONDUCTOR CORP) SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO48 PDF資料下載
參數(shù)資料
| 型號： | LM2645MTD/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO48 |
| 封裝： | TSSOP-48 |
| 文件頁數(shù)： | 3/20頁 |
| 文件大?。?/td> | 911K |
| 代理商： | LM2645MTD/NOPB |
Electrical Characteristics (Continued)
Unless otherwise specified, V
IN = 15V, SGND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply
over the entire operating junction temperature range, 0C to +125C. Specifications appearing in plain type are measured using
low duty cycle pulse testing with T
A = 25C (Note 5), (Note 6). Min/Max limits are guaranteed by design, test, or statistical
analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
SYSTEM
I
IL
Maximum Input Leakage
Current (SD,
FPWM/2NDFB, ON1,
ON2, FSEL).
Logic Input Voltage 0 or 5V
±0.1
A
Logic Outputs
I
OL
PGOOD Low Sink
Current
V
PGOOD = 0.4V
1.4
mA
I
OH
PGOOD High Leakage
Current
V
PGOOD =5V
50
200
nA
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is guaranteed. For guaranteed performance limits and associated test conditions, see the Electrical Characteristic tables.
Note 2: Maximum allowable power dissipation is calculated by using PDMAX =(TJMAX -TA)/θJA, where TJMAX is the maximum junction temperature, TA is the
ambient temperature and
θJA is the junction-to-ambient thermal resistance of the specified package. The 1.56W rating results from using 150C, 25C, and 80C/W
for TJMAX,TA, and θJA respectively. A θJA of 90C/W represents the worst-case condition of no heat sinking of the 48-pin TSSOP. Heat sinking allows the safe
dissipation of more power. The Absolute Maximum power dissipation should be derated by 12.5mW per C above 25C ambient. The LM2645 actively limits its
junction temperature to about 150C.
Note 3: For detailed information on soldering plastic small-outline packages, refer to the Packaging Databook available from National Semiconductor Corporation.
Note 4: Except for SW1, SW2, CBOOT1 and CBOOT2 pins which are 1.5kV. For testing purposes, ESD was applied using the human-body model, a 100pF
capacitor discharged through a 1.5k
resistor.
Note 5: A typical is the center of characterization data measured with low duty cycle pulse tsting at TA = 25C. Typicals are not guaranteed.
Note 6: All limits are guaranteed. All electrical characteristics having room-temperature limits are tested during production with TA =TJ = 25C. All hot and cold limits
are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control.
Note 7: Both switching controllers are OFF. The linear regulators VLIN5 and 3OUT remain ON.
Note 8: The output voltage at the VLIN5 pin may be as high as 6.5V in shutdown mode (SD
≤ 0.6V).
Note 9: When SS1, SS2 pins are charged above this voltage and either of the output voltage at VOUT1 or VOUT2 is still below the regulation limit, the under voltage
protection feature is initialized.
Note 10: Above this voltage, the under voltage protection is enabled.
Note 11: For each device, there is a 10% (typical) gap of the measured output voltage between the PGOOD signal transitions from high to low and the under voltage
protection is activated. The under voltage protection will not be activated while the PGOOD signal is in the logic HIGH state.
Note 12: During normal shutdown or UVP, LDRV1or LDRV2 pin goes high when VO1, VO2 detects an output voltage below this level.
LM2645
www.national.com
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2651MTCX-2.5/NOPB | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| LM2651MTC-2.5/NOPB | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| LM2651MTC-1.8/NOPB | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| LM2670-5.0MDC | 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, UUC |
| LM2670LDX-3.3 | 5.4 A SWITCHING REGULATOR, 280 kHz SWITCHING FREQ-MAX, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2645MTDX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LM2645MTDX/NOPB | 功能描述:IC CTLR SW 2PHS 2OUTPUT 48TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件 |
| LM2647 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Synchronous Buck Regulator Controller |
| LM2647EVAL | 功能描述:電源管理IC開發(fā)工具 LM2647 EVAL BOARD 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 |
| LM2647LQ | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。