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| 型号： | LTC1871HMS#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.05 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 11/36页 |
| 文件大小： | 519K |
| 代理商： | LTC1871HMS#TR |
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LTC1871
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1871fe
APPLICATIONS INFORMATION
Table 1. Recommended Component Manufacturers
VENDOR
COMPONENTS
TELEPHONE
WEB ADDRESS
AVX
Capacitors
(207) 282-5111
avxcorp.com
BH Electronics
Inductors, Transformers
(952) 894-9590
bhelectronics.com
Coilcraft
Inductors
(847) 639-6400
coilcraft.com
Coiltronics
Inductors
(407) 241-7876
coiltronics.com
Diodes, Inc
Diodes
(805) 446-4800
diodes.com
Fairchild
MOSFETs
(408) 822-2126
fairchildsemi.com
General Semiconductor
Diodes
(516) 847-3000
generalsemiconductor.com
International Rectier
MOSFETs, Diodes
(310) 322-3331
irf.com
IRC
Sense Resistors
(361) 992-7900
irctt.com
Kemet
Tantalum Capacitors
(408) 986-0424
kemet.com
Magnetics Inc
Toroid Cores
(800) 245-3984
mag-inc.com
Microsemi
Diodes
(617) 926-0404
microsemi.com
Murata-Erie
Inductors, Capacitors
(770) 436-1300
murata.co.jp
Nichicon
Capacitors
(847) 843-7500
nichicon.com
On Semiconductor
Diodes
(602) 244-6600
onsemi.com
Panasonic
Capacitors
(714) 373-7334
panasonic.com
Sanyo
Capacitors
(619) 661-6835
sanyo.co.jp
Sumida
Inductors
(847) 956-0667
sumida.com
Taiyo Yuden
Capacitors
(408) 573-4150
t-yuden.com
TDK
Capacitors, Inductors
(562) 596-1212
component.tdk.com
Thermalloy
Heat Sinks
(972) 243-4321
aavidthermalloy.com
Tokin
Capacitors
(408) 432-8020
nec-tokinamerica.com
Toko
Inductors
(847) 699-3430
tokoam.com
United Chemicon
Capacitors
(847) 696-2000
chemi-com.com
Vishay/Dale
Resistors
(605) 665-9301
vishay.com
Vishay/Siliconix
MOSFETs
(800) 554-5565
vishay.com
Vishay/Sprague
Capacitors
(207) 324-4140
vishay.com
Zetex
Small-Signal Discretes
(631) 543-7100
zetex.com
Pulse skipping prevents a loss of control of the output at
very light loads and reduces output voltage ripple.
Efciency Considerations: How Much Does VDS
Sensing Help?
The efciency of a switching regulator is equal to the out-
put power divided by the input power (×100%). Percent
efciency can be expressed as:
% Efciency = 100% – (L1 + L2 + L3 + …),
where L1, L2, etc. are the individual loss components as a
percentage of the input power. It is often useful to analyze
individual losses to determine what is limiting the efciency
and which change would produce the most improvement.
Although all dissipative elements in the circuit produce
losses, four main sources usually account for the majority
of the losses in LTC1871 application circuits:
1. The supply current into VIN. The VIN current is the sum
of the DC supply current IQ (given in the Electrical Char-
acteristics) and the MOSFET driver and control currents.
The DC supply current into the VIN pin is typically about
550μA and represents a small power loss (much less
than 1%) that increases with VIN. The driver current
results from switching the gate capacitance of the power
MOSFET; this current is typically much larger than the
DC current. Each time the MOSFET is switched on and
相关PDF资料 |
PDF描述 |
|---|---|
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| LTC1929IG-PG | 3 A DUAL SWITCHING CONTROLLER, 310 kHz SWITCHING FREQ-MAX, PDSO28 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1871IMS | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1871IMS#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1871IMS#TR | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1871IMS#TRPBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1871IMS-1#PBF | 功能描述:IC REG CTRLR BST FLYBK CM 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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