參數(shù)資料
型號： LM27241
廠商： National Semiconductor Corporation
英文描述： Synchronous Buck Regulator Controller for Mobile Systems
中文描述： 同步降壓穩(wěn)壓控制器，用于移動通信系統(tǒng)
文件頁數(shù)： 5/27頁
文件大?。?/td> 1336K
代理商： LM27241
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltages from the indicated pins to SGND/PGND unless
otherwise indicated (Note 2):
VIN
V5
VDD
BOOT
BOOT to SW
SW
ILIM
SENSE, FB
PGOOD
EN
Power Dissipation (T
A
= 25C)
(Note 3)
-0.3V to 30V
-0.3V to 7V
-0.3V to 7V
-0.3V to 36V
-0.3V to 7V
-0.3V to 30V
-0.3V to 30V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
0.75W
Junction Temperature
ESD Rating (Note 4)
Ambient Storage Temperature
Range
Soldering Dwell Time,
Temperature
Wave
Infrared
Vapor Phase
+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
= V
= 0V, VIN = 15V, V
= 3V, R
= 22.1K unless otherwise stated (Note 5).
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typical
(Note 7)
Max
Units
Reference
V
FB_REG
FB Pin Voltage at
Regualtion
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
V
FB_LINE REG
0.5
I
FB
Chip Supply
I
Q_VIN
I
SD_VIN
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
FB
= 0.7V
V
EN
= 0V
V
FB
= 0.7V
V
EN
= 0V
V
FB
= 0.7V
V
FB
= 0.5V
V
EN
= 0V
V
FB
= 0.7V
V
FB
= 0.5V
V
EN
= 0V
VDD rising from 0V
VDD = V5 falling from
V
DD_UVLO
100
0
1.75
8
0.3
0.5
0
2
300
1
4.2
0.7
200
5
3
15
0.5
1.25
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
DD_UVLO
HYS
VDD_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
R
FPWM
V
FPWM_HI
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_LO
0.8
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM27241MTC 制造商:Texas Instruments 功能描述:PWM CONTROLLER SMD 27241 TSSOP20
LM27241MTC/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
LM27241MTCX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Buck Regulator Controller for Mobile Systems
LM27241MTCX/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁面:1316 (CN2011-ZH PDF)
LM27243A E WAF 制造商:Texas Instruments 功能描述:
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