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Ordering number : ENA1513
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Bi-CMOS IC
LV5806MX Step-down Switching Regulator
Overview
LV5806MX is a 1ch step-down switching regulator. 0.13Ω FET is incorporated on the upper side to achieve
high-efficiency operation for large output current. Low-heat resistance and compact-package MFP8 (with Heat sink)
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 100μA 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
3A 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
Thermal shutdown
Reference voltage : 0.8V
Fixed frequency : 370kHz
Soft start
Compact package : MFP8 (200mil) with Heat sink
Applications
LCD TV.
Pre-regulator of linear regulator
Power supply for χDSL
Amusement
Specifications
Absolute 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 pin maximum voltage
Symbol
VIN max
VBT max
VSW max
VBS-SW max
Vfs max
Conditions
Ratings
32
37
VIN max
7
7
Unit
V
V
V
V
V
Continued on next page.
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"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
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thereof. If you should intend to use our products for applications outside the standard applications of our
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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.
70809 SY PC 20090625-S00004 No.A1513-1/5

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LV5806MX
Continued from preceding page.
Parameter
Symbol
Conditions
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Ratings
Unit
Allowable power dissipation
Pd max
With specified substrate *
2.05 W
Junction temperature
Tj max
150 °C
Operating temperature
Topr
-20 to +80
°C
Storage temperature
Tstg
-40 to +150
°C
* Specified substrate : 46.4mm × 31.8mm × 1.7mm, glass epoxy substrate
Note : Plan the maximum voltage while including coil and surge voltages, so that the maximum voltage is not exceeded even for an instant.
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
VIN pin voltage
BOOT pin voltage
SW pin voltage
BOOT pin-SW pin maximum
voltage
FB, EN, COMP, SS pin voltage
VIN
VBT
VSW
VBS-SW
VFSO
Ratings
8 to 28
-0.3 to 34
-0.4 to VIN
6.5
Unit
V
V
V
V
6V
Electrical Characteristics at Ta = 25°C, VIN = 12V, unless otherwise specified.
Parameter
Symbol
Conditions
IC current drain at standby
IC current drain in operation
Efficiency
ICC1
ICC2
Effcy
EN = 0V
EN = open, FB = 1V
VIN = 12V, IOUT = 1A, VO = 5V,
Design target *1
Reference voltage
FB pin bias current
Vref VIN = 8V to 28V (±2%)
Iref FB = 0.8V application
High-side ON resistance
RonH
BOOT = 5V
Low-side ON resistance
RonL
Oscillation frequency
Oscillation frequency during
short-circuit protection
fOSC
fOSCS
EN high-threshold voltage
Venh
EN low-threshold voltage
Venl
EN pull-up current
Ien EN = 0V
Maximum ON DUTY
D max
Current limit peak value 1
Thermal shutdown temperature
Icl1
Ttsd
VIN = 12V, VOUT = 5V, L = 10μH
Design guarantee *2
Thermal shutdown temperature
hysteresis
Dtsd
Design guarantee *2
Soft start current
ISS SS = 0V
*1 : Reference value (not tested before shipment)
*2 : Design guarantee (value guaranteed by design and not tested before shipment)
min
-2%
296
26
0.8
4
6
Ratings
typ
70
5
90
0.8
10
0.13
6
370
32
16
80
160
40
10
Unit
max
μA
mA
%
+2%
100
444
39
V
nA
Ω
Ω
kHz
kHz
1.9 V
V
μA
%
A
°C
°C
14 μA
No.A1513-2/5

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Package Dimensions
unit : mm (typ)
3372
TOP VIEW
5.0
8
SIDE VIEW
1
(0.65)
2
0.35
1.27
SIDE VIEW
0.15
LV5806MX
BOTTOM VIEW
(3.4)
2.5
2.0
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Pd max -- Ta
Mounted on a specified board : 46.4×31.8×1.7mm3
glass epoxy board
2.05
1.5
1.15
1.0
0.5
0
--20 0 20 40 60 80 100
Ambient temperature, Ta -- °C
SANYO : MFP8(200mil)
Pin Assignment
BOOT 1
VIN 2
SW 3
GND 4
8 SS
7 EN
6 COMP
5 FB
Top view
Block Diagram and Sample Application Circuit (3.3V output)
R10 = 4.3kΩ
R1 = 27kΩ
UVLO
FB
BOOT
Current Sense
Amp
OSC
370kHz
- Error
Amp
+
- PWM
comparator
+
BOOT (SW+Vreg.)
Pre Drive
1:N
Pre Drive
C2 = 10μF/25V
Rb = 0
VIN = 12V
C8 = 10μF/25V
C1 = 0.01μF
SW L1 = 10μH
VOUT = 3.3V
C5 = 22μF/16V
R3 = 10kΩ
COMP
R2 = 2.4kΩ C4 = OPEN
C3 = 6800pF
C6 = 0.015μF
H : ON or OPEN
SS
EN
Internal Stable
supply
+-
Current
Limit Logic
VIN
Vref
0.8V
Internal
TSD Regulator
Internal regulator
(5V)
GND
C9 = 22μF/16V
C1,C8,C5,C9 = Ceramic capacitor
L1 = CDRH105RNP-100NC (sumida)
L : OFF
No.A1513-3/5

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LV5806MX
Pin Function
Pin No.
1
2
3
4
5
8
6
Pin name
BOOT
VIN
SW
GND
FB
SS
COMP
Function
Upper MOS transistor boot strap capacitance
connection pin.
Connect the boot capacitance of about 0.022μF
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 100Ω) Rb
proves effective.
Considerations for design :
Insertion of serial beads in the Schottky diode to
eliminate noise may cause occurrence of the
negative voltage beyond the absolute maximum
rating at the SW pin, resulting in failure of normal
operation. Accordingly, eliminate noise not by
inserting above beads, but by means of the BOOT
resistance.
Input voltage pin.
Connect substantially large (20μF or more)
capacitance between this pin and GND.
Power switch pin.
Connect the output LC filter. Connect the above
capacitance between this pin and BOOT pin.
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
×
{1+
(R1
+ R10)
R3
}
Vref = 0.8V
Example : 3.3V output voltage
(See Block Diagram and Sample Application Circuit)
VOUT
=
0.8
×
{1+
(27k + 4.3k)
10k
}
= 3.304V
Soft start pin.
Sets the soft start time by means of the built-in 10μA
source voltage and external soft start capacity. The
soft start capacity C6 can be set as follows :
C6
=
10μA
×
Tss
Vref
Where, Tss is the soft start time and Vref is the
reference voltage.
Example : 1.2ms soft start time achieved
C6
=
10μA
×
1.2msec
0.8V
=
0.015μF
Phase compensation pin.
Connects with the phase compensation external
capacitance and resistance of DCDC converter close
loop.
VIN
FB
VIN
SS
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Equivalent circuit
VIN
CBOOT
Hi side MOS
SW
Low side MOS
10μA
Internal regulation line
VREF
0.8V
Internal regulation line
COMP
Clamp circuit
Continued on next page.
No.A1513-4/5

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LV5806MX
Continued from preceding page.
Pin No. Pin name
Function
7 BOOT Enable pin.
Converter enabled when set to the HIGH voltage or
OPEN state and disabled when connected to GND.
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Equivalent circuit
VIN
5μA
1kΩ
EN
274.5kΩ
186kΩ
Q117
2pF
93kΩ
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.
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.
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No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
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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.
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above.
This catalog provides information as of July, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1513-5/5