- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44549 > LM2639MX/NOPB (NATIONAL SEMICONDUCTOR CORP) SWITCHING CONTROLLER, 8700 kHz SWITCHING FREQ-MAX, PDSO24 PDF資料下載
參數(shù)資料
| 型號(hào)： | LM2639MX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 8700 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | PLASTIC, SOIC-24 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大?。?/td> | 198K |
| 代理商： | LM2639MX/NOPB |
Electrical Characteristics (Continued)
V
CC5V = 5V, VCC12V = 12V unless otherwise specified. Typicals and limits appearing in plain type apply for TA = TJ = +25C.
Limits appearing in boldface type apply over the entire operating temperature range.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
OCC_CM
Over-current Comparator
Common Mode Range
312
V
IB_OC+
OC+ Input Bias Current
V
IN = 5V, OC+ = 5V, OC =
4V
100
145
200
A
IB_OC
OC Input Bias Current
V
IN = 5V, OC+ = 6V, OC =
5V
85
125
165
A
V
OS_OCC
Over-current Comparator Input
Offset Voltage
V
IN = 5V
2
16
42
mV
V
IN = 12V
21
D
MAX
Maximun Duty Cycle
FB = 0V
78
%
gm
Error Amplifier
Transconductance
1.36
mmho
V
ramp
Ramp Signal Peak-to-Peak
Amplitude
2V
I
comp
COMP Pin Source Current
250
400
550
A
I
comp
COMP Pin Sink Current
160
280
400
A
V
comp_hi
COMP Pin High Clamp
2.9
V
comp_lo
COMP Pin Low Clamp
0.19
V
POR
Power On Reset Trip Point
Vcc5V Pin Voltage Rising
4.0
V
Vcc5V Pin Voltage Falling
3.6
Vcc12V Minimum Working
Voltage
(Note 7)
3.8
V
t
SS
Soft Start Delay
F
OSC = 8MHz
1.6
ms
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating ratings do not imply guaranteed performance limits.
Note 2: Maximum allowable power dissipation is a function of the maximum junction temperature, TJMAX, the junction-to-ambient thermal resistance, θJA, and the
ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PMAX = (TJMAX TA)/θJA. The
junction-to-ambient thermal resistance,
θJA, for LM2639 is 78C/W. For a TJMAX of 150C and TA of 25C, the maximum allowable power dissipation is 1.6W.
Note 3: The letter
N stands for the typical output voltages appearing in italic boldface type in Table 1.
Note 4: Max value of logic low means any voltage below this value is guaranteed to be taken as logic low whereas a voltage higher than this value is not guaranteed
to be taken as a logic low.
Note 5: Min value of logic high means any voltage above this value is guaranteed to be taken as logic high whereas a voltage lower than this value is not guaranteed
to be taken as a logic high.
Note 6: When driving bipolar FET drivers in the typical application circuit.
Note 7: When Vcc12V pin goes below this voltage, all DRV pins go to 0V.
Note 8: ESD ratings for pins DRV0, DRV1, DRV2 and DRV3 is 1kV. ESD rating for all other pins is 2kV.
LM2639
www.national.com
3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM2639M/NOPB | SWITCHING CONTROLLER, 8700 kHz SWITCHING FREQ-MAX, PDSO24 |
| LM2639MWC | SWITCHING CONTROLLER, 8700 kHz SWITCHING FREQ-MAX, UUC |
| LM2641-ADJMDC | DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, UUC |
| LM2645MTD/NOPB | SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO48 |
| LM2651MTCX-2.5/NOPB | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM2640 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Adjustable Step-Down Switching Power Supply Controller |
| LM26400Y | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual 2A, 500kHz Wide Input Range Buck Regulator |
| LM26400Y_0708 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual 2A, 500kHz Wide Input Range Buck Regulator |
| LM26400YEVAL | 功能描述:BOARD EVALUATION LM26400Y RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM26400YEVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM26400Y EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。