LT8641A中文资料PDF规格书
LT8641A规格书详情
GENERAL DESCRIPTION
The LT®8641A step-down regulator features Silent
Switcher architecture designed to minimize EMI
emissions while delivering high efficiency at frequencies
up to 3MHz. Assembled in a 3mm × 4mm side wettable
QFN, the monolithic construction with integrated power
switches and inclusion of all necessary circuitry yields a
solution with a minimal PCB footprint. An ultralow 2.5μA
quiescent current — with the output in full regulation —
enables applications requiring highest efficiency at very
small load currents. Transient response remains
excellent and output voltage ripple is below 10mVP-P at
any load, from zero to full current.
The LT8641A allows high VIN to low VOUT conversion at
high frequency with a fast minimum top switch on-time
of 35ns. Operation is safe in overload even with a
saturated inductor.
Essential features are included and easy to use: an opendrain
PG pin signals when the output is in regulation.
The SYNC/MODE pin selects between Burst Mode, pulseskipping,
or spread spectrum mode, and also allows
synchronization to an external clock. Soft-start and
tracking functionality are accessed through the TR/SS
pin. An accurate enable threshold can be set using the
EN/UV pin and a resistor at the RT pin programs switch frequency.
FEATURES
Silent Switcher® Architecture
Ultralow EMI Emissions
Spread Spectrum Frequency Modulation
High Efficiency at High Frequency
Up to 95 Efficiency at 1MHz, 12VIN to 5VOUT
Up to 94 Efficiency at 2MHz, 12VIN to 5VOUT
Wide Input Voltage Range: 3V to 65V
3.5A Maximum Continuous, 5A Peak Transient
Output
Ultralow Quiescent Current Burst Mode®
Operation
2.5μA IQ Regulating 12VIN to 3.3VOUT
Output Ripple < 10mVP-P
Fast Minimum Switch On-Time: 35ns
True 2MHz Operation for 24VIN Systems
Low Dropout Under All Conditions: 130mV at 1A
Safely Tolerates Inductor Saturation in Overload
Adjustable and Synchronizable: 200kHz to 3MHz
Output Soft-Start and Tracking
Small 18-Lead 3mm × 4mm Side Wettable QFN with Improved Solder Joint Reliability
AEC-Q100 Qualified for Automotive Applications
APPLICATIONS
Automotive and Industrial Supplies
General Purpose Step-Down
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ADI/亚德诺 |
21+ |
QFN |
13880 |
公司只售原装,支持实单 |
询价 | ||
LinearTechnology/AnalogD |
23+ |
20-QFN(3x4) |
66800 |
全新更新库存原厂原装现货 |
询价 | ||
Linear |
23+ |
18QFN (3x4) |
9000 |
原装正品,支持实单 |
询价 | ||
ADI/亚德诺 |
21+ |
QFN |
2500 |
询价 | |||
LINEAR/凌特 |
2022 |
QFN |
80000 |
原装现货,OEM渠道,欢迎咨询 |
询价 | ||
LINEAR |
1725+ |
QFN |
6528 |
只做原装正品现货或订货!假一赔十! |
询价 | ||
NA |
23+ |
NA |
26094 |
10年以上分销经验原装进口正品,做服务型企业 |
询价 | ||
ADI(亚德诺)/LINEAR |
1921+ |
QFN-18 |
3575 |
向鸿仓库现货,优势绝对的原装! |
询价 | ||
ADI |
24+ |
20(18)-Lead QFN (3mm x 4mm x 0 |
3660 |
十年信誉,只做全新原装正品现货,以优势说话 !! |
询价 | ||
LT |
QFN |
68900 |
原包原标签100%进口原装常备现货! |
询价 |