參數(shù)資料
型號(hào)： LM2647MTC
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： Dual Synchronous Buck Regulator Controller
中文描述： DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PDSO28
封裝： TSSOP-28
文件頁數(shù)： 5/25頁
文件大?。?/td> 763K
代理商： LM2647MTC
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 1)
Voltages from the indicated pins to SGND/PGND unless
otherwise indicated (Note 2):
VIN
V5
VDD
BOOT1, BOOT2
BOOT1 to SW1, BOOT2 to
SW2
SW1, SW2
ILIM1, ILIM2
SENSE1, SENSE2, FB1, FB2
PGOOD
EN
30V
7V
7V
36V
7V
30V
30V
7V
7V
7V
Power Dissipation (T
A
= 25C)
(Note 3)
Junction Temperature
ESD Rating (Note 4)
Ambient Storage Temperature
Range
Soldering Dwell Time,
Temperature
Wave
Infrared
Vapor Phase
1.0W
+150C
2kV
-65C to +150C
4 sec, 260C
10 sec, 240C
75 sec, 219C
Operating Ratings
(Note 1)
VIN
VDD, V5
Junction Temperature
5.5V to 28V
4.5V to 5.5V
-5C to +125C
Electrical Characteristics
Specifications with standard typeface are for T
= 25C, and those with
boldface
apply over full Operating Junction Tempera-
ture range. VDD = V5 = 5V, V
SGND
= V
PGND
= 0V, VIN = 15V, V
EN
= 3V, R
FADJ
= 22.1K unless otherwise stated. (Note 5)
Symbol
Parameter
Conditions
Min
(Note 6)
Typical
(Note 7)
Max
(Note 6)
Units
Reference
V
FB_REG
FB Pin Voltage at Regualtion
(either FB Pin)
V
FB
Line Regulation
VDD = 4.5V to 5.5V,
VIN = 5.5V to 28V
VDD = 4.5V to 5.5V,
VIN = 5.5V to 28V
V
FB
at regulation
591
600
609
mV
0.5
I
FB
Chip Supply
I
Q_VIN
I
SD_VN
I
Q_VDD
I
SD_VDD
I
Q_V5
FB Pin Current (sourcing)
20
100
nA
VIN Quiescent Current
VIN Shutdown Current
VDD Quiescent Current
VDD Shutdown Current
V5 Normal Operating Current
V
FB1
= V
FB2
= 0.7V
V
EN
= 0V
V
FB1
= V
FB2
= 0.7V
V
EN
= 0V
V
FB1
= V
FB2
= 0.7V
V
FB1
= V
FB2
= 0.5V
V
EN
= 0V
V
FB1
= V
FB2
= 0.7V
V
FB1
= V
FB2
= 0.5V
V
EN
= 0V
VDD rising from 0V
VDD = V5 falling from V
UVLO
100
0
2.5
8
0.3
1
0
2
300
1
4.2
0.7
200
5
4
15
0.5
1.5
5
5
500
5
4.5
0.9
μA
μA
mA
μA
mA
I
SD_V5
I
Q_BOOT
V5 Shutdown Current
BOOT Quiescent Current
μA
μA
I
SD_BOOT
V
UVLO
BOOT Shutdown Current
VDD UVLO Threshold
VDD UVLO Hysteresis
μA
V
V
3.9
0.5
Logic
I
EN
V
EN_HI
V
EN_LO
EN Input Current
EN Input Logic High
EN Input Logic Low
FPWM Pull-down
FPWM Input Logic High
FPWM Input Logic Low
V
EN
= 0 to 5V
0
μA
V
V
k
V
V
2
1.8
1.3
200
1.8
1.3
0.8
1000
V
FPWM
= 2V
100
2
V
FPWM_HI
V
FPWM_LO
0.8
L
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2647MTC/NOPB 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
LM2647MTCX 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
LM2647MTCX/NOPB 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
LM2648 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Two-Phase, Synchronous Step-Down 3-Channel Switching Regulator Controller
LM26480 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Externally Programmable Dual High-Current Step-Down DC/DC and Dual Linear Regulators
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