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PDF LV5818M Data sheet ( Hoja de datos )
| Número de pieza | LV5818M | |
| Descripción | Step-down Switching Regulator | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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www.DataSheet.co.kr
Ordering number : ENA1900
LV5818M
Bi-CMOS IC
Step-down Switching Regulator
Overview
LV5818M is a 1ch step-down switching regulator. 0.3Ω FET is incorporated on the upper side to achieve high-efficiency
operation for large output current. Low-heat resistance and compact-package MFP12 employed. Current mode control
type, with superior load current response and easy phase compensation EN pin, allowing the standby mode with the current
drain of 70μA or less Pulse-by-pulse over-current protection and overheat protection available for protection of load
devices Soft start pin to be provided with a capacitance for soft start.
Functions
• 2A 1ch step-down switching regulator
• Wide input dynamic range ( to 28V)
• High efficiency (90% IOUT = 1A, VIN = 12V, VO = 5V)
• Standby mode
• Over-current protection
• External synchronous driving
• Thermal shutdown
• Reference voltage: 0.8V
• The frequency is changeable in external resistance.
• Soft start
• Compact package: MFP12
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum input VIN voltage
BOOT pin maximum voltage
SW pin maximum voltage
BOOT pin-SW pin maximum voltage
FB, EN, COMP, SS, SYNC, RT pin
maximum voltage
Symbol
VIN max
VBT max
VSW max
VBS-SW max
Vfs max
Conditions
Ratings
32
37
VIN max
7
7
Allowable power dissipation
Pd max
Mount on a specified board *
1.65
Junction temperature
Tj max
150
Operating temperature
Topr
-20 to 80
Storage temperature
Tstg
-40 to 150
* Specified board: 46.4mm × 31.8mm ×1.7mm, glass epoxy both side.
Note: Plan the maximum voltage while including coil and surge voltages, so that the maximum voltage is not exceeded even for an instant.
Unit
V
V
V
V
V
W
°C
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
D0810 SY 20101130-S00002 No.A1900-1/6
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
LV5818M
Continued from preceding page.
Pin No. Pin name
Function
11 RT
RT pin.
To set the frequency, resistance is connected.
Equivalent circuit
VIN
RT
12 SYNC
SYNC pin.
The external cycle clock is impressed.
VIN
SYNC
Considerations for the design
Insertion of serial beads in the Schottky diode for removal of noise may cause generation of the negative voltage
deviating from the absolute maximum rating at the SW pin, resulting in failure of normal operation. In such an event,
do not insert beads as above described and, instead, remove noise by means of the BOOT resistance Rb.
Please set the internal frequency decided by the terminal RT about 50kHz lower than an external input frequency when
you use the external cycle function.
PS No.A1900-5/6
Datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LV5818M.PDF ] | |
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