Ordering number : ENA2120
LV58063MC
Bi-CMOS LSI
Step-down Switching Regulator
Overview
LV58063MC 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 SOP8L (200mil) employed.
Current mode control gives superior load current response with easy phase compensation.
EN pin, allowing the standby mode with the current drain of 70μA.
Pulse-by-pulse over-current protection and overheat protection available for protection of load devices.
Externally adjustable soft start time.
Features
• 3A 1ch step-down switching regulator
• Wide input range (8 to 28V)
• High efficiency (90% IOUT=1A, VIN=12V, VOUT=5V)
• Standby mode
• Over-current protection
• Overshoot control after over-current protection event
• Thermal shutdown
• Reference voltage: 0.8V
• Fixed frequency: 370kHz
• Soft start
• Compact package: SOP8L (200mil) with exposed pad
Application
• LCD/PDP-TV
STB
White Goods
Office equipment
General consumer electronics
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. 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 new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) 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.
91212NKPC 20120822-S00003 No.A2120-1/5
LV58063MC
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Conditions
Conditions
Ratings
Unit
Maximum input VIN voltage
VIN max
32
V
BOOT pin maximum voltage
VBT max
37
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
Vfs max
7
V
voltage
Allowable power dissipation
Pd max
Junction temperature
Tj max
Operating temperature
Storage temperature
Mount on a specified board *
2.05
W
150
°C
Topr
-20 to +80
°C
Tstg
-40 to +150
°C
* Specified board: 46.4mm × 31.8mm ×1.7mm, glass epoxy.
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
Conditions
Conditions
Ratings
Unit
VIN pin voltage
VIN
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 voltage
VBS-SW
6.5
V
FB, EN, COMP, SS pin voltage
VFSO
6
V
Electrical Characteristics at Ta = 25°C VIN = 12V, unless otherwise specified.
Parameter
Conditions
Conditions
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
FOSCS
Ratings
min
typ
-2%
Unit
max
70
μA
5
mA
90
%
0.8
+2%
V
10
100
nA
0.13
Ω
7
Ω
296
370
444
kHz
30
38
46
kHz
1.9
V
short-circuit protection
EN high-threshold voltage
Venh
EN low-threshold voltage
Venl
EN pull-up corrent
Ien
Maximum ON DUTY
D max
0.8
EN=0V
V
16
μA
80
%
Current limit peak value 1
Icl1
VIN=12V, VOUT=5V, L=10μH
Thermal shutdown temperature
Ttsd
*Design guarantee *2
3.8
160
°C
A
Thermal shutdown temperature
Dtsd
*Design guarantee *2
40
°C
ISS
SS=0V
hysteresis
Soft start current
6
10
14
μA
*1: Reference value (not tested before shipment)
*2: Design guarantee (value guaranteed by design and not tested before shipment)
No.A2120-2/5
LV58063MC
Package Dimensions
unit : mm (typ)
3439
Allowable power dissipation, Pd max -- W
TOP VIEW
BOTTOM VIEW
SIDE VIEW
(3.10)
4.93
0.64
3.94
5.99
(2.41)
8
2
1.27
0.41
0.2
1.68 MAX
1
Pd max -- Ta
2.5
2.05
2.0
1.5
1.15
1.0
0.5
0
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
0.05
(1.5)
SIDE VIEW
Mounted on a specified board: 46.4×31.8×1.7mm3
glass epoxy both side
SANYO : SOP8L(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 (SW +Vreg.)
BOOT
C2=10μF/25V
VIN=12V
+
Current Sense
Amp.
Rb=0Ω
C8=10μF/25V
C1=
0.01μF
Pre-Drive
UVLO
R1=27kΩ
FB
R3=10kΩ
OSC
370kHz
+
Error
Amp.
+
PWM
comparator
Pre-Drive
SW
D1=SBM30-03
1:N
R10=4.3kΩ
VOUT=3.3V
L1=10μH
C5=22μF/16V
GND
COMP
C3=
6800pF
C4=OPEN
C9=22μF/16V
R2=2.4kΩ
+
SS
Internal Stable
supply
VIN
C6=0.015μF
EN
H:ON or OPEN
-
Current
Limit Logic
Vref
0.8V
TSD
Internal
Regulator
Internal Regulator
(5V)
L:OFF
• C1,C8,C5,C9 = Ceramic capacitor
• L1=CDRH105RNP-100NC (sumida)
No.A2120-3/5
LV58063MC
Pin Function
Pin No.
1
Pin name
BOOT
Description
Equivalent Circuit
Internal high side nmos fet boot strap capacitor
VIN
terminal.
Connect around 22nF capacitor or greater
between SW and BOOT.
CBOOT
To operate within absolute maximum rating of
SW, to keep stable operation, and to reduce
switching noise, please, use a series resistor, Rb
Hi side MOS
(value is around 100Ω) is recommended to use.
SW
Low side MOS
2
VIN
See BOOT
Input Voltage Pin.
Large Filter Capacitor ( equal or larger than
20μF) should be connected between VIN and
GND to eliminate noise on the input and to
operate properly.
3
SW
Power Switching Pin.
See BOOT
Connect the output LC filter.
Connect the above-mentioned capacitor between
this pin and BOOT pin.
4
GND
Ground pin.
5
FB
Feedback pin.
Connect a voltage divider resistor across FB to
set the regulated output voltage. The output
Internal regulated
VIN
voltage is given by next equation.
VOUT = Vref × { 1 +
(R1 + R10)
}
R3
10μA
Vref = 0.8V
Example: 3.3V output voltage
(See Block Diagram and Sample Application
FB
SS
Circuit)
(27k + 4.3k)
}
VOUT = 0.8 × { 1 +
10k
VREF
0.8V
=3.304V
6
COMP
Phase compensation pin.
Connect an external capacitor and a resistor for
the DC DC converter close loop-phase
VIN
Internal regulation line
compensation.
COMP
Clump circuit
7
EN
Enable terminal.
If applying logically high voltage, or left open, the
VIN
converter operates.
If connected to GND, the converter’s operation
stops.
EN
Q117
2pF
Continued on next page.
No.A2120-4/5
LV58063MC
Continued from preceding page.
Pin No.
8
Pin name
SS
Description
Soft start terminal
Equivalent Circuit
See FB
Internal source current (10μA) and external
capacitor will make soft start time.
Soft start capacitor, C6 is given by next equation,
Tss
C6 = 10μA × Vref
Where, Tss : soft start time,
Vref : reference voltage
Example : soft start time = 1.2ms
1.2ms
C6 = 10μA × 0.8 V = 0.015μF
Considerations for the design
• Insertion of serial beads in the Schottky diode for removal of noise may cause generation of the negative voltage on SW
pin deviating from the absolute maximum rating at the SW pin, resulting in failure of normal operation. Please, do not
insert beads as above described. Instead, remove noise by Rb resistor.
• Exposed pad on the bottom side of the IC should be soldered. We cannot recommend other usages of the exposed pad.
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.
Regarding monolithic semiconductors, if you should intend to use this IC continuously under high temperature,
high current, high voltage, or drastic temperature change, even if it is used within the range of absolute
maximum ratings or operating conditions, there is a possibility of decrease reliability. Please contact us for a
confirmation.
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
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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.
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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intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of September, 2012. Specifications and information herein are subject
to change without notice.
PS No.A2120-5/5