- 您现在的位置：买卖IC网 > PDF目录67757 > LT3513EUHF#TRPBF (LINEAR TECHNOLOGY CORP) 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38 PDF资料下载
参数资料
| 型号： | LT3513EUHF#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封装： | 5 X 7 MM, LEAD FREE, PLASTIC, MO-220WHKD, QFN-38 |
| 文件页数： | 5/22页 |
| 文件大小： | 374K |
| 代理商： | LT3513EUHF#TRPBF |
LT3513
13
3513fc
(~0.3V at maximum load). This leads to a minimum input
voltage of:
VIN(MIN) =
VOUT + VF
DcMAX – VF + VSW
with DCMAX = 0.75.
The user defined undervoltage is set by a resistor divider
connected to the UVLO pin. The comparator pulls 3A
from the pin when the UVLO pin is higher than 1.25V.
The hysteresis and minimum input voltage equations are
as follows:
VHYS = R2+ 2k
(
)3.9A
VIN(MIN) =1.25V
R1
+R2
R1
currentshouldbeatleast30%higher.Forhighestefficiency,
the series resistance (DCR) should be less than 0.1
Ω.
Table 1 lists several vendors and types that are suitable.
Table 1. Inductor Vendors
VENDOR
URL
PART SERIES
TYPE
Coilcraft
www.coilcraft.com
MSS7341
Shielded
Murata
www.murata.com
LQH55D
Open
TDK
www.component.tdk.com
SLF7045
SLF10145
Shielded
Toko
www.toko.com
DC62CB
D63CB
D75C
D75F
Shielded
Open
Sumida
www.sumida.com
CR54
CDRH74
CDRH6D38
CR75
Open
Shielded
Open
The optimum inductor for a given application may differ
fromtheoneindicatedbythissimpledesignguide.Alarger
value inductor provides a higher maximum load current,
and reduces the output voltage ripple. If your load is lower
than the maximum load current, then you can relax the
value of the inductor and operate with higher ripple cur-
rent. This allows you to use a physically smaller inductor
or one with a lower DCR resulting in higher efficiency. Be
aware that the maximum load current depends on input
voltage. A graph in the Typical Performance Characteris-
tics section of this data sheet shows the maximum load
current as a function of input voltage and inductor value
for VOUT = 3.3V. In addition, low inductance may result
in discontinuous mode operation, which further reduces
maximum load current. For details of maximum output
current and discontinuous mode operation, see Linear
Technology’s Application Note 44. Finally, for duty cycles
greater than 50% (VOUT/VIN > 0.5), a minimum induc-
tance is required to avoid subharmonic oscillations, see
Application Note 19.
operaTion
R2
R1
UVLO
3513 A1
VIN
38
INDUCTOR SELECTION AND MAXIMUM OUTPUT
CURRENT
A good first choice for the inductor value is:
L
=
VOUT + VF
1.8
where VF is the voltage drop of the catch diode (~0.4V)
and L is in H. The inductor’s RMS current rating must be
greater than the maximum load current and its saturation
相关PDF资料 |
PDF描述 |
|---|---|
| LT3513EUHF#PBF | 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38 |
| LT3513IUHF#TRPBF | 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38 |
| LT3573EMSE#TRPBF | 1.85 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3573IMSE#PBF | 1.85 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3573EMSE#PBF | 1.85 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3513IUHF#PBF | 功能描述:IC REG 5-OUT FOR TFT-LCD 38QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT3513IUHF#TRPBF | 功能描述:IC REG 5-OUT FOR TFT-LCD 38QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT3513IUHF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz High Current 5-Output Regulator for TFT-LCD Panels |
| LT3513IUHF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz High Current 5-Output Regulator for TFT-LCD Panels |
| LT3514EFE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK ADJ 24-TSSOP 制造商:Linear Technology 功能描述:BUCK 350KHZ-2.2MHZ 3.2-36V 制造商:Linear Technology 功能描述:BUCK, 350KHZ-2.2MHZ, 3.2-36V, TSSOP-24 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK, ADJ, 2.1MHZ, TSSOP-24, Primary Input Voltage:36V, No. of Outputs:3, Output Current:2A, No. of Pins:24, Operating Temperature Min:-40C, Operating Temperature Max:125C, MSL:MSL 1 - Unlimited, Package / Case:24-TSSOP |
发布紧急采购，3分钟左右您将得到回复。