參數(shù)資料
型號： LM26480QSQX-CF/NOPB
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 2.4 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, QCC24
封裝： 4 X 4 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, LLP-24
文件頁數(shù)： 14/30頁
文件大?。?/td> 2455K
代理商： LM26480QSQX-CF/NOPB
Application Notes
EXTERNAL COMPONENT SELECTION
30040410
Target
Vout (V)
Ideal Resistor Values
Common R Values
Actual VOUT
W/ Com/R (V)
Actual VOUT
Delta from
Target (V)
Feedback Capacitors
R1 (K
)
R2 (K
)
R1 (K
)
R2 (K
)
C1(pF)
C2(pF)
0.8
120
200
121
200
0.803
0.002
15
none
Buck1
0.9
160
200
162
200
0.905
0.005
15
none
Only
1
200
1
0
15
none
^
1.1
240
200
240
200
1.1
0
15
none
|
1.2
280
200
280
200
1.2
0
12
none
|
1.3
320
200
324
200
1.31
0.01
12
none
Buck1
1.4
360
200
357
200
1.393
-0.008
10
none
And
1.5
400
200
402
200
1.505
0.005
10
none
Buck2
1.6
440
200
442
200
1.605
0.005
8.2
none
|
1.7
427
178
432
178
1.713
0.013
8.2
none
|
1.8
463
178
464
178
1.803
0.003
8.2
none
|
1.9
498
178
499
178
1.902
0.002
8.2
none
|
2
450
150
453
150
2.01
0.01
8.2
none
>
2.1
480
150
475
150
2.083
-0.017
8.2
none
^
2.2
422
124
422
124
2.202
0.002
8.2
none
|
2.3
446
124
442
124
2.282
-0.018
8.2
none
|
2.4
471
124
475
124
2.415
0.015
8.2
none
|
2.5
400
100
402
100
2.51
0.01
8.2
none
|
2.6
420
100
422
100
2.61
0.01
8.2
none
|
2.7
440
100
442
100
2.71
0.01
8.2
33
Buck2
2.8
460
100
464
100
2.82
0.02
8.2
33
Only
2.9
480
100
475
100
2.875
-0.025
8.2
33
|
3
500
100
499
100
2.995
-0.005
6.8
33
|
3.1
520
100
523
100
3.115
0.015
6.8
33
|
3.2
540
100
536
100
3.18
-0.02
6.8
33
|
3.3
560
100
562
100
3.31
0.01
6.8
33
|
The output voltages of the bucks of the LM26480 are estab-
lished by the feedback resistor dividers R1 and R2 shown on
the application circuit above. The equation for determining V
is: V
OUT = VFB (R1+R2)/R2 where VFB is the voltage on the
Buck FBx pin.
The Buck control loop will force the voltage on V
FB to be 0.50
V ±3%.
The above table shows ideal resistor values to establish buck
voltages from 0.8V to 3.3 V along with common resistor val-
ues to establish these voltages. Common resistors do not
always produce the target value, error is given in the delta
column.
In addition to the resistor feedback, capacitor feedback C1 is
always required, and depending on the output voltage capac-
itor C2 is also required. See the application diagram below
and the above table for these requirements.
Inductor
Value
Unit
Description
Notes
L
SW1,2
2.2
H
SW1,2 inductor
D.C.R. 70 m
21
www.national.com
LM26480
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM26480SQ-AA 制造商:Texas Instruments 功能描述:DC/ DC STEP DOWN, DUAL LINEAR REG, IC
LM26480SQ-AA/NOPB 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) DUAL HI-CRNT STEP- DOWN DC/DC RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L
LM26480SQ-AA/S7002404 制造商:Texas Instruments 功能描述:
LM26480SQ-AAEV 功能描述:BOARD EVALUATION LM26480SQ-AA RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 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
LM26480SQ-AAEV/NOPB 功能描述:電源管理IC開發(fā)工具 LM26480SQ-AAEV 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
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