參數(shù)資料
型號(hào)： LM2746
廠商： National Semiconductor Corporation
英文描述： Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
中文描述： 低壓N溝道MOSFET同步降壓穩(wěn)壓控制器
文件頁(yè)數(shù)： 4/24頁(yè)
文件大?。?/td> 1087K
代理商： LM2746
Electrical Characteristics
(Continued)
V
= 3.3V unless otherwise indicated. Limits in standard type are for T
= 25C only; limits in
boldface type
apply over the
junction temperature (T
) range of -40C to +125C. Minimum and Maximum limits are guaranteed through test, design, or sta-
tistical correlation. Typical values represent the most likely parametric norm at T
J
= 25C, and are provided for reference pur-
poses only.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
GATE DRIVE
I
Q-BOOT
R
HG_UP
BOOT Pin Quiescent Current
High-Side MOSFET Driver
Pull-Up ON resistance
High-Side MOSFET Driver
Pull-Down ON resistance
Low-Side MOSFET Driver
Pull-Up ON resistance
Low-Side MOSFET Driver
Pull-Down ON resistance
V
BOOT
= 12V, V
SD
= 0
18
90
μA
V
BOOT
= 5V
@
350mA Sourcing
3
R
HG_DN
V
BOOT
= 5V
@
350mA Sinking
2
R
LG_UP
V
BOOT
= 5V
@
350mA Sourcing
3
R
LG_DN
V
BOOT
= 5V
@
350mA Sinking
2
OSCILLATOR
f
SW
PWM Frequency
R
FADJ
= 702.1 k
R
FADJ
= 98.74 k
R
FADJ
= 45.74 k
R
FADJ
= 24.91 k
f
SW
= 300kHz
f
SW
= 600kHz
f
SW
= 1MHz
50
300
600
1000
80
76
73
kHz
475
725
D
Max High-Side Duty Cycle
%
LOGIC INPUTS AND OUTPUTS
V
SD-IH
V
SD-IL
V
PWGD-TH-LO
V
PWGD-TH-HI
V
PWGD-HYS
SD Pin Logic High Trip Point
SD Pin Logic Low Trip Point
PWGD Pin Trip Points
PWGD Pin Trip Points
PWGD Hysteresis
V
SD
Rising
V
SD
Falling
FB Falling
FB Rising
FB Falling
FB Rising
1.3
V
V
V
V
0.8
0.408
0.677
0.434
0.710
60
90
0.457
0.742
mV
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the device may occur.
Operating ratings
indicate conditions for which the device
operates correctly.
Opearting Ratings
do not imply guaranteed performance limits.
Note 2:
The human body model is a 100pF capacitor discharged through a 1.5k resistor into each pin.
L
www.national.com
4
相關(guān)PDF資料
PDF描述
LM2746MXA Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXAX Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2753SD High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753 High Power Switched Capacitor Voltage Convertor/Flash LED Driver
LM2753SDX High Power Switched Capacitor Voltage Convertor/Flash LED Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM2746MXA 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXA/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 14TSSOP RoHS:是 類(lèi)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(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤(pán) 包裝:帶卷 (TR)
LM2746MXAX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2746MXAX/NOPB 功能描述:IC REG CTRLR BUCK PWM VM 14TSSOP RoHS:是 類(lèi)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(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 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(yè)面:1316 (CN2011-ZH PDF)
LM2747 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
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