PDF LN2351 Data sheet ( Hoja de datos )

Número de pieza	LN2351
Descripción	Super-Small Package VFM Control Step-up Switching Regulator
Fabricantes	Natlinear
Logotipo
Hay una vista previa y un enlace de descarga de LN2351 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas
No Preview Available ! LN2351 Super-Small Package VFM Control Step-up Switching Regulator ■ General Description The LN2351 Series is a CMOS VFM-control step-up switching regulator that mainly consists of a reference voltage source, an oscillator, and a comparator. enabling products with a low ripple over a wide range, high efficiency, and high output current. Products with a fixed duty ratio of 75 % （ Lower Output Voltage ） or 88%(Higher Output Voltage) are also available. With the LN2351 Series, a step-up switching regulator can be configured by using an external coil, capacitor, and diode. A protection circuit turns off the built-in MOS FET when the voltage at the CONT pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the LN2351 Series ideal for applications such as the power supply unit of portable equipment. ■ Features  Low voltage operation: Start up at 0.9 V min(IOUT=1 mA) guaranteed  Low input current: During maximum operation: 6.5 μA (VOUT=3.3 V, typ.) ■ Ordering Information LN2351P ②③④⑤⑥ ① Designator ① Symbol 51 Description Indicates the product number ②③ 15～70 Output Voltage e.g: 33: 3.3V 50: 5.0V  Duty ratio: 77 % Built-in fixed-type PFM controller  External parts: Coil, capacitor, and diode  Output voltage: Settable to between 2.5V to 5.5V ,accuracy of 2% ■ Applications  Power supply for portable equipment such as digital cameras, electronic notebooks, and PDA  Power supply for audio equipment such as portable CD/MD players  Constant voltage power supply for cameras, video equipment and communications equipment  Power supply for microcomputers ■ Package  SOT-23-5L  SOT-23-3L  SOT-23-3B  SOT-89-3L Designator ④ ⑤ ⑥ Symbol Description Output Voltage 2 Accuracy e.g. 2: ±2% M SOT-23-3L N SOT-23-3B P SOT-89-3L S SOT-23-5L(A) K SOT-23-5L(B) Embossed Tape ： R Standard Feed Embossed Tape ： L Reverse Feed Rev.1.0 —July. 25, 2012 1 http://www.natlinear.com 1 page ■ Electrical Characteristics LN2351 (Ta=25℃, VIN=1.5V，VOUT=3.3V unless otherwise noted) Item Symbol Output voltage VOUT Input Voltage Operation start voltage VIN VST1 Active current Iact Input current without load Line regulation Load regulation Output voltage temperature coefficient Maximum oscillation frequency Iss △ VOUT1 △ VOUT2 △ VOUT △ Ta*VOUT fosc Duty ratio Duty Efficiency EFFI Condition - - IOUT=1mA VOUT＝Output voltage×0.9 VOUT＝Output voltage×1.1 IOUT=30mA IOUT=10uA—100mA Ta=-40℃～＋85℃ VOUT＝Output voltage×0.95 VOUT＝Output voltage×0.95 － Min. Typ. Max. Unit VOUT(s) VOUT(S) VOUT(s) ×0.98 ×1.02 - - 6.5 - - 1.1 V Test circuit 1 40 55 uA － 6.5 7.5 2 － 0.22 0.4 % － 0.35 0.5 1 － ±40 － ppm/℃ 225 300 375 kHz 70 77 84 ％－ 88 －％ 2 1 Remarks: VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output voltage. fo is the working frequency. ■ Test Circuits Test circuit 1 Test circuit 2 L VIN C1 LX VOUT LN2351 CE NC 1K VSS VOUT C2 LX VOUT LN2351 CE NC VSS VOUT C1 Rev.1.0 —July. 25, 2012 5 http://www.natlinear.com 5 Page  SOT-23-3B LN2351 Rev.1.0 —July. 25, 2012 11 http://www.natlinear.com 11 Page

Páginas	Total 11 Páginas
PDF Descargar	[ Datasheet LN2351.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
LN2351	Super-Small Package VFM Control Step-up Switching Regulator	Natlinear

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar