Ordering number : ENA1513
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
Symbol
Conditions
Ratings
Unit
Maximum input VIN voltage
VIN max
32
BOOT pin maximum voltage
VBT max
37
V
V
SW pin maximum voltage
VSW max
VIN max
V
BOOT pin-SW pin maximum voltage
VBS-SW max
7
V
FB, EN, COMP, SS pin maximum voltage
Vfs max
7
V
Continued on next page.
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.
70809 SY PC 20090625-S00004 No.A1513-1/5
LV5806MX
Continued from preceding page.
Parameter
Allowable power dissipation
Symbol
Pd max
Conditions
Ratings
With specified substrate *
Unit
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
VIN pin voltage
Symbol
Conditions
Ratings
VIN
Unit
8 to 28
V
BOOT pin voltage
VBT
-0.3 to 34
V
SW pin voltage
VSW
-0.4 to VIN
V
BOOT pin-SW pin maximum
VBS-SW
6.5
V
6
V
voltage
FB, EN, COMP, SS pin voltage
VFSO
Electrical Characteristics at Ta = 25°C, VIN = 12V, unless otherwise specified.
Parameter
Symbol
Ratings
Conditions
min
IC current drain at standby
ICC1
EN = 0V
IC current drain in operation
ICC2
EN = open, FB = 1V
Efficiency
Effcy
VIN = 12V, IOUT = 1A, VO = 5V,
Design target *1
Reference voltage
Vref
VIN = 8V to 28V (±2%)
FB pin bias current
Iref
FB = 0.8V application
High-side ON resistance
RonH
BOOT = 5V
Low-side ON resistance
RonL
Oscillation frequency
fOSC
Oscillation frequency during
short-circuit protection
fOSCS
EN high-threshold voltage
Venh
EN low-threshold voltage
Venl
EN pull-up current
Ien
Maximum ON DUTY
D max
Current limit peak value 1
Icl1
typ
-2%
Unit
max
70
μA
5
mA
90
%
0.8
+2%
V
10
100
nA
Ω
0.13
Ω
6
296
370
444
kHz
26
32
39
kHz
1.9
0.8
EN = 0V
VIN = 12V, VOUT = 5V, L = 10μH
V
V
16
μA
80
%
4
A
Thermal shutdown temperature
Ttsd
Design guarantee *2
160
°C
Thermal shutdown temperature
hysteresis
Dtsd
Design guarantee *2
40
°C
Soft start current
ISS
SS = 0V
6
10
14
μA
*1 : Reference value (not tested before shipment)
*2 : Design guarantee (value guaranteed by design and not tested before shipment)
No.A1513-2/5
LV5806MX
Package Dimensions
unit : mm (typ)
3372
Pd max -- Ta
TOP VIEW
SIDE VIEW
Allowable power dissipation, Pd max -- W
2.5
BOTTOM VIEW
5.0
(3.4)
(2.6)
0.43
6.0
4.4
8
1
2
0.35
(0.65)
0.15
0.05
(1.5)
SIDE VIEW
1.7 MAX
1.27
Mounted on a specified board : 46.4×31.8×1.7mm3
glass epoxy board
2.05
2.0
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
8 SS
VIN 2
7 EN
SW 3
6 COMP
GND 4
5 FB
Top view
Block Diagram and Sample Application Circuit (3.3V output)
BOOT
BOOT (SW+Vreg.)
C2 = 10μF/25V
Current Sense
Amp
C8 = 10μF/25V
Rb = 0
Pre Drive
UVLO
D1=SBM30-03
VOUT = 3.3V
SW
OSC
370kHz
FB
R3 = 10kΩ
C1 = 0.01μF
1:N
R10 = 4.3kΩ
R1 = 27kΩ
+
Error
Amp
+
VIN = 12V
PWM
comparator
Pre Drive
COMP
L1 = 10μH
C5 = 22μF/16V
GND
C9 = 22μF/16V
R2 = 2.4kΩ
-
+
C4 = OPEN
Current
Limit Logic
Internal Stable
supply
C3 = 6800pF
EN
• L1
= Ceramic capacitor
= CDRH105RNP-100NC (sumida)
VIN
SS
C6 = 0.015μF
• C1,C8,C5,C9
Vref
0.8V
TSD
Internal
Regulator
Internal regulator
(5V)
H : ON or OPEN
L : OFF
No.A1513-3/5
LV5806MX
Pin Function
Pin No.
1
Pin name
BOOT
Function
Equivalent circuit
Upper MOS transistor boot strap capacitance
connection pin.
Connect the boot capacitance of about 0.022μF
VIN
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
CBOOT
proves effective.
Considerations for design :
• Insertion of serial beads in the Schottky diode to
eliminate noise may cause occurrence of the
Hi side MOS
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
SW
resistance.
2
VIN
Input voltage pin.
Low side MOS
Connect substantially large (20μF 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
GND
Ground pin.
5
FB
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 :
(R1 + R10)
}
VOUT = Vref × {1+
R3
Vref = 0.8V
VIN
Internal regulation line
Example : 3.3V output voltage
(See Block Diagram and Sample Application Circuit)
VOUT = 0.8 × {1+
10μA
(27k + 4.3k)
}
10k
= 3.304V
8
SS
Soft start pin.
FB
Sets the soft start time by means of the built-in 10μA
SS
source voltage and external soft start capacity. The
VREF
0.8V
soft start capacity C6 can be set as follows :
Tss
C6 = 10μA × Vref
Where, Tss is the soft start time and Vref is the
reference voltage.
Example : 1.2ms soft start time achieved
C6 = 10μA ×
6
COMP
1.2msec
0.8V = 0.015μF
Phase compensation pin.
Connects with the phase compensation external
capacitance and resistance of DCDC converter close
VIN
Internal regulation line
loop.
COMP
Clamp circuit
Continued on next page.
No.A1513-4/5
LV5806MX
Continued from preceding page.
Pin No.
7
Pin name
BOOT
Function
Equivalent circuit
Enable pin.
Converter enabled when set to the HIGH voltage or
OPEN state and disabled when connected to GND.
VIN
5μA
1kΩ
EN
274.5kΩ
Q117
2pF
186kΩ
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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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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intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of July, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1513-5/5