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Ordering number : ENA1475
Bi-CMOS IC
LV5809MX
Overview
Step-down Switching Regulator
LV5809MX is a 1ch step-down switching regulator. 0.2 FET is incorporated on the upper side to achieve high-efficiency operation for large output current. Low-heat resistance and compact-package MFP8 (200mil) employed. Current mode control type, with superior load current response and easy phase compensation ON/OFF pin, allowing the standby mode with the current drain of 40A 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
* 2.5A 1ch step-down switching regulator * Wide input dynamic range (4.5 to 18V) * High efficiency (90% IOUT = 1A, VIN = 12V, VO = 5V) * Standby mode * Over-current protection
* Thermal shutdown * Reference voltage: 0.8V * Fixed frequency: 330kHz * Soft start * Compact package: MFP8 (200mil) with Exposed Pad
Specifications
Maximum Ratings at Ta = 25C
Parameter Maximum input VIN voltage BOOT pin maximum voltage SW pin maximum voltage BOOT pin-SW pin maximum voltage EN pin maximum voltage FB, COMP, SS pin maximum voltage Allowable power dissipation Junction temperature Operating temperature Storage temperature Symbol VIN max VBT max VSW max VBS-SW max VEN max Vfs max Pd max Tj max Topr Tstg Mount on a specified board * Conditions Ratings 20 25 VIN max 7 20 7 2.05 150 -20 to 80 -40 to 150 Unit V V V V V V W C C C
* Specified board: 46.4mm x 31.8mm x1.7mm, 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.
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.
52009 MS 20090507-S00003 No.A1475-1/5
LV5809MX
Recommended Operating Conditions at Ta = 25C
Parameter VIN pin voltage BOOT pin voltage SW pin voltage BOOT pin-SW pin maximum voltage EN pin maximum voltage FB, COMP, SS pin voltage VEN VFSO 18 6 V V VIN VBT VSW VBS-SW Symbol Conditions Ratings 4.5 to 18 -0.3 to 23 -0.4 to VIN 6.5 Unit V V V V
Electrical Characteristics at Ta = 25C, VIN = 12V, unless otherwise specified.
Parameter IC current drain at standby IC current drain in operation Efficiency Reference voltage FB pin bias current High-side ON resistance Oscillation frequency Oscillation frequency during short-circuit protection EN high-threshold voltage EN low-threshold voltage Maximum ON DUTY Current limit peak value 1 Current limit peak value 2 Current limit peak value 3 Thermal shutdown temperature Thermal shutdown temperature hysteresis Soft start current ISS SS=0V 6 10 14 A *1: Reference value (not tested before shipment) *2: Design guarantee (value guaranteed by design and not tested before shipment) Venh Venl D max Ic1 Ic2 Ic3 Ttsd Dtsd VIN=12V, VOUT=5V, L=10H VIN=12V, VOUT=3.3V, L=10H VIN=12V, VOUT=1.2V, L=10H *Design guarantee *2 *Design guarantee *2 2.7 3.0 3.3 160 40 0.8 80 5.3 5.6 5.9 2.1 V V % A A A C C Symbol ICC1 ICC2 Effcy Vref Iref RonH fOSC fOSCS EN=0V EN=open VIN=12V, IOUT=1A, Vo=5V, Design target *1 VIN=4.5V to 18V (2%) FB=0.8V application BOOT=5V 265 26 -2% Conditions Ratings min typ 40 2 90 0.8 10 0.2 330 33 395 40 +2% 100 max Unit A mA % V nA kHz kHz
No.A1475-2/5
LV5809MX
Package Dimensions
unit : mm (typ) 3372
1.4
Pd max -- Ta
Mounted on a specified board: 46.4x31.8x1.7mm3 glass epoxy both side
TOP VIEW 5.0 8
SIDE VIEW
BOTTOM VIEW (3.4)
Allowable power dissipation, Pd max -- W
1.2 1.15 1.0
0.8 1.15
(2.6)
4.4
6.0
0.6
0.43
1 (0.65)
2 0.35 1.27 SIDE VIEW 0.15
0.4
0.2
1.7 MAX
(1.5)
0 -20
0
20
40
60
80
100
Ambient temperature, Ta -- C
0.05
SANYO : MFP8(200mil)
Pin Assignment
BOOT 1 VIN 2 SW 3 GND 4 Top view 8 SS 7 EN 6 COMP 5 FB
Block Diagram and Sample Application Circuit (3.3V output)
BOOT (SW + Vreg.) BOOT VIN=12V
+
UVLO
R10 R1
Current Sense Amp. Pre-Drive 1:N
Rb C2 C1 C8
SW
L1
VOUT=3.3V
OSC 330kHz FB
+
Error Amp.
+
PWM comparator
D1
C5
C9
R3
COMP
C4=OPEN
GND BOOT Short protect circuit COMP SW
R2 C3
SS
C6
Internal Stable supply VIN Vref 0.8V TSD Internal Regulator
Short protect circuit Internal Regulator (5V)
EN
H : ON L or open : OFF
* C1,C8,C5,C9 = ceramic capacitor used.
No.A1475-3/5
LV5809MX
Pin Function
Pin No. 1 Pin name BOOT Function Upper MOS transistor boot strap capacitance connection pin. Connect the boot capacitance of about 0.022F between SW pins. To protect the SW pin's absolute maximum rating, to ensure stable operation, and to eliminate noise, the boot capacitance serial resistance (about 100) Rb proves effective. 2 VIN Input voltage pin. Connect substantially large (10F 2 parallel or more) capacitance between this pin and GND. 3 SW Power switch pin. Connect the output LC filter. Connect the above capacitance between this pin and BOOT pin. 4 5 GND FB Ground pin. Feedback pin. Sets the output voltage by means of split resistor in the section of the output voltage VOUT - FB - GND. VOUT setting is made as calculated below: VOUT = Vref x { 1 + (R1 + R10) } R3 Vref = 0.8V Example: 3.3V output voltage (See Block Diagram and Sample Application Circuit) VOUT = Vref x { 1 + =3.304V 8 SS Soft start pin. Sets the soft start time by means of the built-in 10A source voltage and external soft start capacity. The soft start capacity C6 can be set as follows: Tss C6 = 10A x Vref Where, Tss is the soft start time and Vref is the reference voltage. Example: 1.2ms soft start time achieved 1.2ms C6 = 10A x 0.8V = 0.015F 6 COMP Phase compensation pin. Connects with the phase compensation external capacitance and resistance of DC/DC converter close loop. (27k + 4.3k) } 10k
10A
Short protection circuit
Equivalent circuit
VIN
BOOT
Output MOS
SW
VIN
Internal regulation line
SS
VREF 0.8V
FB
VIN
Internal regulation line
Short protection circuit
COMP
7
EN
Enable pin. Converter enabled when set to the HIGH voltage and disabled when LOW voltage or OPEN state.
VIN
5A 1k
EN
183k Q117 183k 2pF
No.A1475-4/5
LV5809MX
Considerations for the design
* During use with VIN = 12V or less, the boot strap voltage may become deficient due to intermittent operation at no load, resulting in failure of normal operation. In this case, insert a resistance of about 500 between VOUT and GND and avoid the intermittent operation mode during use. * 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.
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of SANYO Semiconductor Co.,Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO Semiconductor Co.,Ltd. product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above.
This catalog provides information as of May, 2009. Specifications and information herein are subject to change without notice. PS No.A1475-5/5

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