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参数资料
| 型号： | LTC3866EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/36页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 24TSSOP |
| 标准包装： | 62 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 850kHz |
| 占空比： | 95% |
| 电源电压： | 4.5 V ~ 38 V |
| 降压： | 是 |
| 升压： | 无 |
| 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-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 管件 |
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LTC3866
Current Mode Synchronous
Controller for Sub Milliohm
DCR Sensing
Sub Milliohm DCR Current Sensing
High Efficiency: Up to 95%
Selectable Current Sensing Limit
Programmable DCR Temperature Compensation
Die Overtemperature Thermal Shutdown
± 0.5% 0.6V Output Voltage Accuracy
Programmable Fixed Frequency 250kHz to 770kHz
High Speed Differential Remote Sense Amplifier
Wide Input Voltage Range: 4.5V to 38V
Output Voltage Range: 0.6V to 3.5V with Diffamp
Adjustable Soft-Start or Output Voltage Tracking
Foldback Output Current Limit
Short-Circuit Soft Recovery
Output Overvoltage Protection
24-Lead (4mm × 4mm) QFN and 24-Lead FE Packages
Computer Systems
Telecom Systems
Industrial and Medical Instruments
DC Power Distribution Systems
FEATURES
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APPLICATIONS
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TYPICAL APPLICATION
DESCRIPTION
The LTC ? 3866 is a single phase current mode synchronous
step-down switching regulator controller that drives all
N-channel power MOSFET switches. It employs a unique
architecture which enhances the signal-to-noise ratio of
the current sense signal, allowing the use of a very low
DC resistance power inductor to maximize the efficiency
in high current applications. This feature also reduces the
switching jitter commonly found in low DCR applications.
The LTC3866 also includes a high speed remote sense dif-
ferential amplifier, a programmable current sense limit that
can be selected to 10mV, 15mV, 20mV, 25mV or 30mV,
and DCR temperature compensation to limit the maximum
output current precisely over temperature.
The LTC3866 also features a precise 0.6V reference with a
guaranteed limit of ±0.5% that provides an accurate output
voltage from 0.6V to 3.5V. A 4.5V to 38V input voltage
range allows it to support a wide variety of bus voltages
and various types of batteries.
The LTC3866 is offered in a low profile 24-lead 4mm ×
4mm QFN and 24-lead exposed pad FE packages.
L , LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are
registered trademarks and No R SENSE is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
5481178, 5705919, 5929620, 6177787, 6580258, 6498466, 6611131, patent pending.
V IN
4.5V TO 20V
RUN
PGOOD
TK/SS
ITEMP
HighEfficiency,1.5V/30AStep-DownConverterwithVeryLowDCRSensing
100k
FREQ MODE/PLLIN
0.1μF 220μF
4.7μF
100
90
Efficiency vs Load Current
and Mode
ITH
EXTV CC
80
V FB
LTC3866
V IN
70
220pF
30.1k
20k
10k
1.5nF
C1
220nF
C2
220nF
DIFFP BOOST
DIFFN TG
SNSD + SW
SNS – BG
SNSA + PGND
ILIM CLKOUT
SGND
DIFFOUT INTV CC
0.1μF
R2
931
0.33μH
DCR = 0.32m
R1
4.64k
C OUT
470μF
× 2
V OUT
1.5V
30A
60
50
40
30
20
10
0
0.01
0.1
V IN = 12V
V OUT = 1.5V
L = 0.33μH
(DCR = 0.32m TYP)
CCM
PULSE SKIPPING
Burst Mode
OPERATION
1 10 100
LOAD CURRENT (A)
3866 TA01b
3866 TA01a
3866fb
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3866EUF#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN 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) |
| LTC3866EUF#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24-QFN 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) |
| LTC3866IFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC3866IFE#PBF | 制造商:Linear Technology 功能描述:BUCK REGULATOR CURRENT MODE SYNC TSSOP |
| LTC3866IFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 24TSSOP 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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