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LA5756 の電気的特性と機能

LA5756のメーカーはSanyo Semicon Deviceです、この部品の機能は「Switching Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 LA5756
部品説明 Switching Regulator
メーカ Sanyo Semicon Device
ロゴ Sanyo Semicon Device ロゴ 




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LA5756 Datasheet, LA5756 PDF,ピン配置, 機能
Ordering number : ENA1438B
LA5756
Monolithic Linear IC
Separately-excited Step-down
Switching Regulator (Variable Type)
Overview
The LA5756 is a separately-excited step-down switching regulator (variable type).
Features
Output smoothing condenser can use a Low ESR condenser for the reliability improvement
High efficiency
Four external parts
Time-base generator (80kHz) incorporated
Current limiter incorporated
Thermal shutdown circuit incorporated
Soft start circuit incorporated
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Input voltage
Output current
SW pin application reverse
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VIN max
IO max
VSW
Pd max1
Pd max2
Topr
Tstg
Conditions
Infinite heat sink.
No heat sink.
Ratings
34
3.5
-1
7.5
1.75
-30 to +125
-40 to +150
Unit
V
A
V
W
W
°C
°C
Recommended Operating Conditions at Ta = 25°C
Parameter
Input voltage range
Symbol
VIN
Conditions
Ratings
4.5 to 32
Unit
V
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.
62409 SY 20090611-S00001 / 41509 MS / 40809 MS 20090326-S00003 No.A1438-1/4

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LA5756 pdf, ピン配列
Block Diagram
LA5756
VIN 1
Constnt
Current
Circuit
Reg.
OSC
OCP
RESET
DRIVE
2 SWOUT
ON/OFF Comp.
0.4V
Comp.
TSD
Amp.
VREF
4 VOS
5
SS
Application Circuit Example
VIN
3
GND
SWOUT
L1
LA5756
C1
D1 C2
SS GND
C3
VOS
R2
R1
Notes: C3 is for the soft start function. Delete C3 and keep the SS pin open when the soft function is not necessary.
Description of Functional Settings
1. Calculation equation to set the output voltage
This IC controls the switching output so that the VOS pin voltage becomes 1.26V (typ).
The equation to set the output voltage is as follows:
VO =
1+
R2
R1
× 1.26V(typ)
The VOS pin has the inrush current of 1μA (typ). Therefore, the error becomes larger when R1 and R2 resistance
values are large.
No.A1438-3/4


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共有リンク

Link :


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