Ordering number : ENA1495A
Bi-CMOS IC
LV5807MX
Overview
Step-down Switching Regulator
LV5807MX is a 1ch step-down switching regulator. 0.12Ω 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 40μA 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
•
3A 1ch step-down switching regulator
•
Wide input dynamic range (8 to 18V)
•
High efficiency (90% IOUT = 1A, VIN = 12V, VO = 5V)
•
Standby mode
•
Over-current protection
•
Thermal shutdown
•
Reference voltage: 0.79V
•
Fixed frequency: 385kHz
•
Soft start
•
Compact package: MFP8 (200mil) with Exposed Pad
Specifications
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
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
×
31.8mm
×1.7mm,
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.
61709 SY / 61009 MS 20090602-S00001 No.A1495-1/5
LV5807MX
Recommended Operating Conditions
at Ta = 25°C
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
8 to 18
-0.3 to 23
-0.4 to VIN
6.5
Unit
V
V
V
V
Electrical Characteristics
at Ta
=
25°C, 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
Low-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
Thermal shutdown temperature
Thermal shutdown temperature
hysteresis
Soft start current
Symbol
ICC1
ICC2
Effcy
Vref
Iref
RonH
RonL
fOSC
fOSCS
Venh
Venl
D max
Icl1
Ttsd
Dtsd
ISS
SW pin output current,
VIN=12V, VOUT=5V, L=10μH
*Design guarantee *2
*Design guarantee *2
SS=0V
6
3.8
310
29
1.05
0.8
EN=0V
EN=5V, FB=1V
VIN=12V, IOUT=1A, Vo=5V, Design target *1
VIN=8V to 18V (±2%)
FB=0.79V application
BOOT=5V, IOUT=1A
0.7742
Conditions
Ratings
min
typ
40
3
90
0.79
10
0.12
5
385
38
1.57
1.23
80
5
160
40
10
14
460
47
2.1
1.65
0.8058
100
max
Unit
μA
mA
%
V
nA
Ω
Ω
kHz
kHz
V
V
%
A
°C
°C
μA
*1: Reference value (not tested before shipment)
*2: Design guarantee (value guaranteed by design and not tested before shipment)
No.A1495-2/5
LV5807MX
Package Dimensions
unit : mm (typ)
3372
TOP VIEW
5.0
8
SIDE VIEW
BOTTOM VIEW
(3.4)
2.5
Pd max -- Ta
Mounted on a specified board: 46.4×31.8×1.7mm
3
glass epoxy both side
Allowable power dissipation, Pd max -- W
2.05
2.0
1.5
1.15
1.0
1
(0.65)
2
0.35
1.27
SIDE VIEW
0.15
0.43
(2.6)
4.4
6.0
0.5
1.7 MAX
0
-20
0
20
40
60
80
100
(1.5)
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
C2=10 F/25V×2
VIN=12V
+
UVLO
R10=4.7k
R1=27k
Current Sense
Amp.
Pre-Drive
1:N
Rb=15
C1=
0.1 F
SW
D1=SBM30-03
VOUT=3.3V
L1=10 H
FB
R3=10k
OSC
385kHz
-
+
Error
Amp.
-
+
Pre-Drive
PWM
comparator
Current
Limit
Comparator
Short
protect
circuit
COMP
COMP
C4=OPEN
GND
C5=10 F/16V×3
R2=1.0k
C3=
5600pF
BOOT
SW
SS
C6=0.015 F
Internal Stable
supply
Vref
0.8V
VIN
TSD
Internal
Regulator
Internal Regulator
(5V)
Short
protect
circuit
EN
H : ON
L or open : OFF
C1,C2,C5 = Ceramic capacitor
L1 = CDRH105RNP-100NC (sumida)
No.A1495-3/5
LV5807MX
Pin Function
Pin No.
1
Pin name
BOOT
Function
Upper MOS transistor boot strap capacitance connection pin.
Connect the boot capacitance of about 0.1μF 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 15Ω) Rb proves effective.
2
VIN
Input voltage pin.
Connect substantially large (10μF 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.
Hi side MOS
0.12Ω
Short protection
Equivalent circuit
VIN
BOOT
SW
Low side MOS
5Ω
GND
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
×
{ 1 +
(R1 + R10)
}
R3
Vref = 0.79V
Example: 3.3V output voltage
(See Block Diagram and Sample Application Circuit)
VOUT = 0.79
×
{ 1 +
=3.294V
8
SS
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:
Tss
C6 = 10μA
×
Vref
Where, Tss is the soft start time and Vref is the reference
voltage.
Example: 1.2ms soft start time achieved
1.2ms
C6 = 10μA
×
0.79 V = 0.015μF
6
COMP
Phase compensation pin.
Connects with the phase compensation external capacitance
and resistance of DC/DC converter close loop.
(27k + 4.7k)
}
10k
10μA
VIN
Internal regulation line
SS
VREF
0.8V
FB
VIN
Internal regulation line
COMP
Short
protection
7
EN
Enable pin.
Converter enabled when set to the HIGH voltage and disabled
when LOW voltage or OPEN state.
VIN
5μA
EN
1kΩ
183kΩ
Q117
183kΩ
2pF
No.A1495-4/5
LV5807MX
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.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
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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
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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.
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
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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 June, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1495-5/5
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