LA5756 Monolithic Linear Separately-excited Step-down S

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

LA5756 Monolithic Linear Separately-excited Step-down S

Datasheet Thumbnail

Top Searches for this datasheet

Ordering number ENA1438B
LA5756
Monolithic Linear
Separately-excited Step-down
Switching Regulator (Variable Type)
LA5756 separately-excited step-down switching regulator (variable type).
Features
Output smoothing condenser condenser 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 25°C
Parameter Input voltage Output current application reverse Allowable power dissipation Symbol max1 max2 Operating temperature Storage temperature Topr Tstg Infinite heat sink. heat sink. Conditions Ratings 1.75 +125 +150 Unit
Recommended Operating Conditions 25°C
Parameter Input voltage range Symbol Conditions Ratings Unit
SANYO Semiconductor Co.,Ltd. products described contained herein are, with regard "standard application", intended general electronics equipment (home appliances, equipment, communication device, office equipment, industrial equipment etc.). products mentioned herein shall intended "special application" (medical equipment whose purpose sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level reliability directly threaten human lives case failure malfunction product cause harm human bodies, shall they grant guarantee thereof. should intend products applications outside standard applications customer considering such and/or outside scope intended standard applications, please consult with prior intended use. there consultation inquiry before intended use, customer shall solely responsible use. Specifications SANYO Semiconductor Co.,Ltd. products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer' products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer' products equipment.
62409 20090611-S00001 41509 40809 20090326-S00003 No.A1438-1/4
LA5756
Electrical Characteristics 25°C, 3.3V
Parameter Reference voltage Efficiency Switching frequency Line regulation Load regulation Output voltage temperature coefficient Ripple attenuation factor Current limiter operating voltage Thermal shutdown operating temperature Thermal shutdown hysteresis width Symbol VOLINE VOLOAD VO/Ta RREJ 15V, 1.0A VIN= 20V, IO=1.0A 15V, 1.5A Designed target value* 120Hz Designed target value* Designed target value* Conditions 1.235 Ratings 1.26 ±0.5 1.285 mV/°C Unit
Designed target value: measurement made.
Package Dimensions
unit (typ) 3376
10.0
10.4 10.0
Allowable power dissipation,
Infinite heat sink jc=5°C
15.0
heat sink mounting torque 39Ncm silicone grease applied
MSG07021
(8.8)
15.5
21.3
1.75
heat sink
(1.6)
3.15 7.05
Ambient temperature,
SANYO 220-5HMDB
Assignment
(1)VIN (2)SWOUT (3)GND (4)VOS (5)SS
No.A1438-2/4
LA5756
Block Diagram
Constnt Current Circuit Reg. SWOUT
RESET DRIVE
Comp.
Amp.
ON/OFF Comp. 0.4V
VREF
Application Circuit Example
SWOUT
LA5756
Notes: soft start function. Delete keep open when soft function necessary.
Description Functional Settings
Calculation equation output voltage This controls switching output that voltage becomes 1.26V (typ). equation output voltage follows:
1.26V(typ)
inrush current (typ). Therefore, error becomes larger when resistance values large.
No.A1438-3/4
LA5756
Start delay function internally-connected (typ) constant-current supply. When voltage exceeds threshold voltage, regulator starts operation. threshold 0.62V(typ), start delay time calculated follows: setting
msec
Timing Chart
SWOUT
VOUT
SANYO Semiconductor Co.,Ltd. assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO Semiconductor Co.,Ltd. products described contained herein. SANYO Semiconductor Co.,Ltd. strives supply high-quality high-reliability products, however, semiconductor products fail malfunction with some probability. possible that these probabilistic failures malfunction could give rise accidents events that could endanger human lives, trouble that could give rise smoke fire, accidents that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO Semiconductor Co.,Ltd. products described contained herein controlled under applicable local export control laws regulations, such products require export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written consent SANYO Semiconductor Co.,Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO Semiconductor Co.,Ltd. product that intend use. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. Upon using technical information products described herein, neither warranty license shall granted with regard intellectual property rights other rights SANYO Semiconductor Co.,Ltd. third party. SANYO Semiconductor Co.,Ltd. shall liable claim suits with regard third party's intellctual property rights which resulted from technical information products mentioned above.
This catalog provides information June, 2009. Specifications information herein subject change without notice. No.A1438-4/4

LA5756 Monolithic Linear Separately-excited Step-down S

Top Searches for this datasheet

Other recent searches