LV58063MC [ONSEMI]
Step-down Switching Regulator;
| 型号： | LV58063MC |
| 厂家： | 
ONSEMI |
| 描述： | Step-down Switching Regulator 开关 光电二极管 |
| 文件： | 总6页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA2120B
LV58063MC
Bi-CMOS IC
Step-down Switching Regulator
http://onsemi.com
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.
Function
• 3A 1ch step-down switching regulator
• Thermal shutdown
• Wide input range (8 to 28V)
• Reference voltage: 0.8V
• High efficiency (90% I
=1A, V =12V, V =5V)
OUT
IN OUT
• Fixed frequency: 370kHz
• Standby mode
• Soft start
• Over-current protection
• Compact package: SOP8L (200mil) with exposed pad
• Overshoot control after over-current protection event
SOP8L (200mil)
Application
• LCD/PDP-TV
• STB
• White Goods
• Office equipment
• General consumer electronics
ORDERING INFORMATION
See detailed ordering and shipping information on page 6 of this data sheet.
Semiconductor Components Industries, LLC, 2014
July, 2014
71814NK 20140707-S00003/40414NK/91212NKPC No.A2120-1/6
LV58063MC
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Maximum input V voltage
IN
V
V
V
V
max
32
37
max
7
IN
BOOT pin maximum voltage
SW pin maximum voltage
max
max
V
BT
V
V
SW
IN
BOOT pin-SW pin maximum voltage
max
V
BS-SW
FB, EN, COMP, SS pin maximum
voltage
Vfs max
7
V
Allowable power dissipation
Pd max
Tj max
Topr
Mount on a specified board *
2.05
150
W
°C
°C
°C
Junction temperature
Operating temperature
Storage temperature
-20 to +80
Tstg
-40 to +150
* 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.
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed,
damage may occur and reliability may be affected.
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
V
pin voltage
V
V
V
V
V
8 to 28
IN
IN
BOOT pin voltage
-0.3 to 34
V
BT
SW pin voltage
-0.4 to V
IN
V
SW
BOOT pin-SW pin voltage
FB, EN, COMP, SS pin voltage
6.5
6
V
BS-SW
FSO
V
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended
Operating Ranges limits may affect device reliability.
Electrical Characteristics at Ta = 25°C V = 12V, unless otherwise specified.
IN
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
IC current drain in standby
IC current drain in operation
Efficiency
I
I
1
2
EN=0V
EN=open, FB=1V
=12V, I =1A, V
70
μA
mA
%
CC
5
CC
Effcy
V
=5V
OUT
90
IN OUT
Design target: *1
=8V to 28V (±2%)
Reference voltage
Vref
V
-2%
0.8
10
+2%
V
nA
Ω
IN
FB pin bias current
Iref
FB=0.8V application
BOOT=5V
100
High-side ON resistance
Low-side ON resistance
Oscillation frequency
RonH
RonL
0.13
7
Ω
F
296
30
370
38
444
46
kHz
kHz
OSC
Oscillation frequency during
short-circuit protection
F
OSCS
EN high-threshold voltage
Venh
Venl
Ien
1.9
V
V
EN low-threshold voltage
EN pull-up corrent
0.8
3.8
EN=0V
16
80
μA
%
A
Maximum ON DUTY
D max
Icl
Current limit peak value
Thermal shutdown temperature
V
=12V, V
=5V, L=10μH
OUT
IN
Ttsd
Dtsd
*Design guarantee *2
*Design guarantee *2
160
40
°C
°C
Thermal shutdown temperature
hysteresis
Soft start current
I
SS=0V
6
10
14
μA
SS
*1: Design target (not tested before shipment)
*2: Design guarantee (value guaranteed by design and not tested before shipment)
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be
indicated by the Electrical Characteristics if operated under different conditions.
No.A2120-2/6
LV58063MC
Package Dimensions
unit : mm
SOIC8 N EP / SOP8L (200 mil)
CASE 751DM
ISSUE O
No.A2120-3/6
LV58063MC
Pd max -- Ta
Mounted on a specified board: 46.4×31.8×1.7mm3
2.5
glass epoxy both side
2.05
2.0
1.5
1.0
0.5
0
1.15
-20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
Pin Assignment
BOOT
1
2
3
4
8
7
6
5
SS
V
EN
IN
SW
COMP
FB
GND
Top view
Block Diagram and Sample Application Circuit (3.3V output)
BOOT (SW +Vreg.)
BOOT
C2=10μF/25V
V =12V
IN
Current Sense
Amp.
Rb=0Ω
+
C8=10μF/25V
C1=
0.01μF
Pre-Drive
UVLO
V =3.3V
OUT
1:N
SW
L1=10μH
R10=4.3kΩ
R1=27kΩ
-
-
OSC
370kHz
Error
Amp.
PWM
comparator
Pre-Drive
C5=22μF/16V
+
+
FB
R3=10kΩ
GND
COMP
C9=22μF/16V
R2=2.4kΩ
+
-
C3=
C4=OPEN
6800pF
Current
Limit Logic
Internal Stable
supply
SS
EN
V
IN
C6=0.015μF
Vref
0.8V
Internal
Regulator
TSD
Internal Regulator
(5V)
H:ON or OPEN
L:OFF
•
C1,C8,C5,C9 = Ceramic capacitor
• L1=CDRH105RNP-100NC (sumida)
No.A2120-4/6
LV58063MC
Pin Function
Pin No.
Pin name
Description
Equivalent Circuit
1
BOOT
Internal high side mos fet boot strap capacitor
Pin.
Connect around 0.01μF capacitor or greater
between SW and BOOT.
To operate within absolute maximum rating of
SW, to keep stable operation, and to reduce
switching noise, please use a series resistor, Rb
(value is around 100Ω) is recommended to use.
2
V
Input Voltage Pin.
See BOOT
IN
Large Filter Capacitor ( equal or larger than
20μF) should be connected between V and
IN
GND to eliminate noise on the input and to
operate properly.
When using electrolytic capacitors, it is
recommended to add a ceramic capacitor of
about 0.1uF between VIN-GND for stability.
Power Switching Pin.
3
SW
See BOOT
Connect the output LC filter.
Connect the above-mentioned capacitor between
this pin and BOOT pin.
4
5
GND
FB
Ground pin.
Feedback pin.
Connect a voltage divider resistor across FB to
set the regulated output voltage. The output
voltage is given by next equation.
Internal regulated
V
IN
(R1 + R10)
10μA
V
= Vref × { 1 +
}
OUT
R3
Vref = 0.8V
Example: 3.3V output voltage
(See Block Diagram and Sample Application
Circuit)
FB
SS
VREF
0.8V
(27k + 4.3k)
V
= 0.8 × { 1 +
}
OUT
10k
=3.304V
Phase compensation pin.
6
COMP
Connect an external capacitor and a resistor for
the DC DC converter close loop-phase
compensation.
Internal regulation line
V
IN
COMP
Clump circuit
Continued on next page.
No.A2120-5/6
LV58063MC
Continued from preceding page.
Pin No.
7
Pin name
EN
Description
Equivalent Circuit
Enable Pin.
V
IN
If applying logically high voltage, or left open, the
converter operates.
If connected to GND, the converter’s operation
stops.
EN
Q117
It is not applied to the EN before VIN is applied.
2pF
8
SS
Soft start Pin
See FB
Internal source current (10μA) and external
capacitor will make soft start time.
Soft start capacitor, C6 is given by next equation,
Tss
Vref
C6 = 10μA ×
Where, Tss : soft start time,
Vref : reference voltage
Example : soft start time 1.2ms
1.2ms
0.8 V
C6 = 10μA ×
= 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.
ORDERING INFORMATION
Device
LV58063MC-AH
LV58063MCZ-AH
Package
SOP8L (200mil)
(Pb-Free / Halogen Free)
Shipping (Qty / Packing)
2000 / Tape & Reel
SOP8L (200mil)
(Pb-Free / Halogen Free)
2000 / Tape & Reel
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further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitabilityof its products for any particular purpose,
nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including
without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can
and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are
not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applicationsintended to support or
sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
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directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was
negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all
applicable copyright laws and is not for resale in any manner.
PS No.A2120-6/6
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