Bi-CMOS LV5809MX Step-down Switching Regulator LV5809MX

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Bi-CMOS LV5809MX Step-down Switching Regulator LV5809MX

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Ordering number ENA1475
Bi-CMOS
LV5809MX
Step-down Switching Regulator
LV5809MX step-down switching regulator. incorporated upper side achieve high-efficiency operation large output current. Low-heat resistance compact-package MFP8 (200mil) employed. Current mode control type, with superior load current response easy phase compensation ON/OFF pin, allowing standby mode with current drain 40µA less Pulse-by-pulse over-current protection overheat protection available protection load devices Soft start provided with capacitance soft start.
Functions
2.5A step-down switching regulator Wide input dynamic range (4.5 18V) High efficiency (90% IOUT 12V, Standby mode Over-current protection
Thermal shutdown Reference voltage: 0.8V Fixed frequency: 330kHz Soft start Compact package: MFP8 (200mil) with Exposed
Specifications
Maximum Ratings 25°C
Parameter Maximum input voltage BOOT maximum voltage maximum voltage BOOT pin-SW maximum voltage maximum voltage COMP, maximum voltage Allowable power dissipation Junction temperature Operating temperature Storage temperature Symbol VBS-SW Topr Tstg Mount specified board Conditions Ratings 2.05 Unit
Specified board: 46.4mm 31.8mm glass epoxy both side. Note: Plan maximum voltage while including coil surge voltages, that maximum voltage exceeded even instant.
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.
52009 20090507-S00003 No.A1475-1/5
LV5809MX
Recommended Operating Conditions 25°C
Parameter voltage BOOT voltage voltage BOOT pin-SW maximum voltage maximum voltage COMP, voltage VFSO VBS-SW Symbol Conditions Ratings -0.3 -0.4 Unit
Electrical Characteristics 25°C, 12V, unless otherwise specified.
Parameter current drain standby current drain operation Efficiency Reference voltage bias current High-side resistance Oscillation frequency Oscillation frequency during short-circuit protection high-threshold voltage low-threshold voltage Maximum DUTY Current limit peak value Current limit peak value Current limit peak value Thermal shutdown temperature Thermal shutdown temperature hysteresis Soft start current SS=0V Reference value (not tested before shipment) Design guarantee (value guaranteed design tested before shipment) Venh Venl Ttsd Dtsd VIN=12V, VOUT=5V, L=10µH VIN=12V, VOUT=3.3V, L=10µH VIN=12V, VOUT=1.2V, L=10µH *Design guarantee *Design guarantee Symbol ICC1 ICC2 Effcy Vref Iref RonH fOSC fOSCS EN=0V EN=open VIN=12V, IOUT=1A, Vo=5V, Design target VIN=4.5V (±2%) FB=0.8V application BOOT=5V Conditions Ratings Unit
No.A1475-2/5
LV5809MX
Package Dimensions
unit (typ) 3372
Mounted specified board: glass epoxy both side
VIEW
SIDE VIEW
BOTTOM VIEW (3.4)
Allowable power dissipation,
1.15
1.15
(2.6)
0.43
(0.65)
0.35 1.27 SIDE VIEW 0.15
(1.5)
Ambient temperature,
0.05
SANYO MFP8(200mil)
Assignment
BOOT view COMP
Block Diagram Sample Application Circuit (3.3V output)
BOOT Vreg.) BOOT VIN=12V
UVLO
Current Sense Amp. Pre-Drive
VOUT=3.3V
330kHz
Error Amp.
comparator
COMP
C4=OPEN
BOOT Short protect circuit COMP
Internal Stable supply Vref 0.8V Internal Regulator
Short protect circuit Internal Regulator (5V)
open
C1,C8,C5,C9 ceramic capacitor used.
No.A1475-3/5
LV5809MX
Function
name BOOT Function Upper transistor boot strap capacitance connection pin. Connect boot capacitance about 0.022µF between pins. protect pin's absolute maximum rating, ensure stable operation, eliminate noise, boot capacitance serial resistance (about 100) proves effective. Input voltage pin. Connect substantially large (10µF parallel more) capacitance between this GND. Power switch pin. Connect output filter. Connect above capacitance between this BOOT pin. Ground pin. Feedback pin. Sets output voltage means split resistor section output voltage VOUT GND. VOUT setting made calculated below: VOUT Vref R10) Vref 0.8V Example: 3.3V output voltage (See Block Diagram Sample Application Circuit) VOUT Vref =3.304V Soft start pin. Sets soft start time means built-in 10µA source voltage external soft start capacity. soft start capacity follows: 10µA Vref Where, soft start time Vref reference voltage. Example: 1.2ms soft start time achieved 1.2ms 10µA 0.8V 0.015µF COMP Phase compensation pin. Connects with phase compensation external capacitance resistance DC/DC converter close loop. (27k 4.3k)
10µA
Short protection circuit
Equivalent circuit
BOOT
Output
Internal regulation line
VREF 0.8V
Internal regulation line
Short protection circuit
COMP
Enable pin. Converter enabled when HIGH voltage disabled when voltage OPEN state.
183k Q117 183k
No.A1475-4/5
LV5809MX
Considerations design
During with less, boot strap voltage become deficient intermittent operation load, resulting failure normal operation. this case, insert resistance about between VOUT avoid intermittent operation mode during use. Insertion serial beads Schottky diode removal noise cause generation negative voltage deviating from absolute maximum rating pin, resulting failure normal operation. such event, insert beads above described and, instead, remove noise means BOOT resistance
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 May, 2009. Specifications information herein subject change without notice. No.A1475-5/5

Bi-CMOS LV5809MX Step-down Switching Regulator LV5809MX

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