Ordering number : ENA1761A
LV5813TT
Bi-CMOS IC
Step-down Switching Regulator
Overview
LV5813TT is 1ch step down switching regulator. 0.25Ω FET is incorporated on the upper side to achieve high-efficiency
operation for large output current. Compact-package MSOP8 (150mil) 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 90μA 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
• 1.5A 1ch step-down switching regulator
• Wide input dynamic range (4.75V to 18V)
• High efficiency : 90% (VIN = 12V, VOUT = 5V, IOUT = 1A)
• Compact package : MSOP8 (150mil)
• Standby mode
• Over-current protection
• Thermal shutdown
• Fixed frequency : 370kHz
• Soft start
• Reference voltage : 0.8V
Applications
• LCD TV
• Blu-ray Disc Player/Recorder
• Pre regulator
• PDP TV
• For χDSL power supply
• Amusement
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.
72110 SY/60210 SY PC 20100511-S00007 No.A1761-1/9
LV5813TT
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum input VIN voltage
VIN max
20
V
BOOT pin maximum voltage
VBT max
25
V
SW pin maximum voltage
VSW max
VIN max
V
BOOT pin-SW pin maximum voltage
VBS-SW max
7
V
EN pin maximum voltage
VEN max
VIN+0.3
V
FB, COMP, SS pin maximum voltage
Vfs max
Allowable power dissipation
Pd max
Junction temperature
Tj max
Operating temperature
Storage temperature
*1
7
V
0.85
W
150
°C
Topr
-20 to +80
°C
Tstg
-40 to +150
°C
With specified substrate *2
Note : Plan the maximum voltage while including coil and surge voltages, so that the maximum voltage is not exceeded even for an instant.
*1 : VIN + 0.3 < VIN max
*2 : Specified substrate : 46.4mm × 31.8mm × 1.7mm, glass epoxy substrate
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
VIN pin voltage
VIN
4.75 to 18
BOOT pin voltage
VBT
-0.3 to 23
V
V
SW pin voltage
VSW
-0.4 to VIN
V
BOOT pin-SW pin maximum voltage
VBS-SW
EN pin maximum voltage
VEN
FB, COMP, SS pin voltage
VFSO
6.5
V
VIN + 0.3
V
6
V
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 = 5V, FB = 1V
Efficiency
Effcy
VIN = 12V, IOUT = 1A, VO = 5V,
Design target *3
Reference voltage
Vref
VIN = 4.75V to 18V
FB pin bias current
Iref
FB = 0.8V
High-side ON resistance
RonH
BOOT = 5V
Oscillation frequency
FOSC
Oscillation frequency during
short-circuit protection
typ
-2%
Unit
max
90
μA
2
mA
90
%
0.8
+2%
V
20
200
nA
Ω
0.25
296
370
444
kHz
FOSCS
85
115
145
kHz
EN high-threshold voltage
Venh
0.9
1.8
2.7
V
EN low-threshold voltage
Venl
0.7
1.35
2.0
V
Maximum ON DUTY
D max
Current limit peak value 1
Icl1
VIN = 12V, VOUT = 1.2V, L = 10μH
3.1
5.7
A
Current limit peak value 2
Icl2
VIN = 12V, VOUT = 3.3V, L = 10μH
2.8
5.4
A
2.5
85
%
Current limit peak value 3
Icl3
VIN = 12V, VOUT = 5V, L = 10μH
Thermal shutdown temperature
Ttsd
Design guarantee *4
160
°C
Thermal shutdown temperature
hysteresis
Dtsd
Design guarantee *4
40
°C
Soft start current
ISS
SS = 0V
3
5.1
5
7
A
μA
*3 : Reference value (not tested before shipment)
*4 : Design guarantee (value guaranteed by design and not tested before shipment)
No.A1761-2/9
LV5813TT
Package Dimensions
unit : mm (typ)
3245B
Allowable power dissipation, Pd max -- W
1.0
3.0
0.5
3.0
4.9
8
1
(0.53)
2
0.65
1.1MAX
0.125
0.85
0.8
0.6
0.48
0.4
0.2
0
--20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
0.08
(0.85)
0.25
Pd max -- Ta
Mounted on a specified board : 46.4×31.8×1.7mm3
glass epoxy board
SANYO : MSOP8(150mil)
Specified Board (Bottom side)
Specified Board (Top side)
Pin Assignment
BOOT 1
8 SS
VIN 2
7 EN
SW 3
6 COMP
GND 4
5 FB
Top view
No.A1761-3/9
LV5813TT
Block Diagram and Sample Application Circuit (3.3V output)
BOOT
VIN
VIN
Internal
Regulator
UVLO
Internal
Regulator
H : ON
L : OFF
Rb =
100Ω
EN
+
OSC
370kHz
Slope
comp
PWM
Comparator
Output
logic
0.25
Pre-Drive
C2 C8 = 10μF/25V × 2
C1 =
0.022μF
VOUT
SW
+
-
L1 = 10μH
R10 =
4.7kΩ
D1
R1 =
27kΩ
FB
+
R3 =
10kΩ
Error
Amp
COMP
C3 =
3300pF
R2 =
6.8kΩ
GND
SS
C6 =
0.015μF
C5 C9 =
10μF/6.3V × 3
Pin short
protection
Vref
0.8V
TSD
L1
D1
C8 C2
C5 C9
C
: NR8040T100M [TAIYO YUDEN]
: SBM30-03 [SANYO]
: GRM31CB31E106KA75 [MURATA]
: C2012JB0J106M [TDK]
: Ceramic Capacitor
Pin Function
Pin No.
1
Pin name
BOOT
Description
Equivalent Circuit
Upper MOS transistor boot strap capacitance
VIN
connection pin
Connect the boot capacitance of about 0.022μF
between SW pins
To protect the SW pin’s absolute maximum rating,
Short protection
circuit
to ensure stable operation, and to eliminate
noise, the boot capacitance serial resistance
(about 100Ω) Rb proves effective.
BOOT
Output MOS
SW
2
VIN
Input voltage pin.
See BOOT
Connect substantially large (10μF 2 parameters
or more) capacitance between this pin and GND.
3
SW
Power switch pin.
See BOOT
Connect the output LC filter. Connect the above
capacitance between this pin and BOOT pin.
4
GND
Ground pin.
Continued on next page.
No.A1761-4/9
LV5813TT
Continued from preceding page.
Pin No.
5
Pin name
FB
Description
Equivalent Circuit
Feedback pin
Sets the output voltage by means of split resistor
in the section of the output voltage VOUT - FB -
VIN
Internal regulation
line
GND. VOUT setting is made as calculated
below :
5μA
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+
FB
(27k + 4.3k)
}
10k
VREF
0.8V
SS
= 3.304V
6
COMP
Phase compensation pin
Connects with the phase compensation external
capacitance and resistance of DC/DC converter
VIN
Internal regulation line
close loop.
Short
protection
circuit
COMP
7
EN
Enable pin
Converter enabled when set to the HIGH voltage
and disabled when connected to GND.
VIN
EN
8
SS
Soft start pin
Set the soft start time by means of the built-in 5μA
source voltage and external soft start capacity
Css can be set as follows :
Tss
C6 = 5μA × Vref
Where, Tss is soft start time and Vref is the
reference voltage.
Example : 2.4ms soft start time achieved
2.4ms
Css = 5μA × 0.8V = 0.015μF
No.A1761-5/9
LV5813TT
Reference data (1)
105
ICC1 -- Ta
2.3
VIN = 12V
EN = 0V
IC current drain in operation, ICC2 -- mA
IC current drain at standby, ICC1 -- μA
110
100
95
90
85
80
75
70
--40
--20
0
20
40
60
80
ICC2 -- Ta
VIN = 12V
EN = 5V
FB = 1V
2.2
2.1
2.0
1.9
--40
100
--20
Ambient temperature, Ta -- °C
820
Vref -- Ta
50
VIN = 12V
45
FB pin bias current, Iref -- nA
Reference voltage, Vref -- mV
815
810
805
800
795
790
785
--20
0
20
40
60
80
100
120
80
100
80
100
80
100
80
100
40
35
30
25
20
15
10
--20
FOSC -- Ta
95
VIN = 12V
410
390
370
350
330
310
290
--40
--20
0
20
40
60
0
20
40
60
Ambient temperature, Ta -- °C
Maximum ON DUTY, D max -- %
Oscillation frequency, FOSC -- kHz
60
VIN = 12V
FB = 0.8V
0
--40
140
430
80
D max -- Ta
VIN = 12V
90
85
80
--40
100
--20
Ambient temperature, Ta -- °C
0
20
40
60
Ambient temperature, Ta -- °C
FOSCS -- Ta
7.0
VIN = 12V
6.5
Soft start current, ISS -- μA
Oscillation frequency during
short-circuit protection, FOSCS -- kHz
40
Iref -- Ta
Ambient temperature, Ta -- °C
24
20
5
780
--40
450
0
Ambient temperature, Ta -- °C
18
12
6
ISS -- Ta
VIN = 12V
SS = 0V
6.0
5.5
5.0
4.5
4.0
3.5
0
--40
--20
0
20
40
60
Ambient temperature, Ta -- °C
80
100
3.0
--40
--20
0
20
40
60
Ambient temperature, Ta -- °C
No.A1761-6/9
LV5813TT
Venh -- Ta
2.6
VIN = 12V
EN low-threshold voltage, Venl -- V
EN high-threshold voltage, Venh -- V
2.8
2.4
2.0
1.6
1.2
0.8
--40
--20
0
20
40
60
80
Venl -- Ta
VIN = 12V
2.2
1.8
1.4
1.0
0.6
--40
100
Ambient temperature, Ta -- °C
5.5
--20
0
20
40
60
80
100
Ambient temperature, Ta -- °C
Icl -- Ta
4.0
VIN = 12V
L = 10μH
3.5
Current Limit
VIN = 12V → VOUT = 3.3V
L = 10μH
Output voltage, VOUT -- V
Current limit peak, Icl -- A
5.0
4.5
VOUT
4.0
V
= 1.2
3.3V
5.0V
3.5
3.0
2.5
2.0
* L1 = 10μH (CDRH105RNP-100N,
sumida made),
D1 = SBM30-03 (SANYO made)
1.5
1.0
3.0
0.5
* L1 = 10μH (CDRH105RNP-100N, sumida made),
D1 = SBM30-03 (SANYO made)
2.5
--40
--20
0
20
40
60
80
0.0
0.0
100
Ambient temperature, Ta -- °C
94
Efficiency -- Load current
5.10
°C
25
Output voltage, VOUT -- V
Efficiency -- %
92
90
°C
80
°C
0
-3
88
86
* L1 = 10μH (CDRH105RNP-100N, sumida made),
D1 = SBM30-03 (SANYO made)
84
0.0
0.5
1.0
Load current -- A
2.0
3.0
4.0
Load current -- A
VIN = 12V → VOUT = 5V
=
Ta
1.0
Load Regulation
VIN = 12V → VOUT = 5V
5.06
5.02
Ta = 80°C
4.98
25°C
-30°C
4.94
* L1 = 10μH (CDRH105RNP-100N, sumida made),
D1 = SBM30-03 (SANYO made)
1.5
4.90
0.0
0.5
1.0
1.5
Load current -- A
No.A1761-7/9
LV5813TT
Reference data (2)
(* measurement circuit is shown in “8. Sample Application circuit”, VIN = 12V ⇒ VOUT = 3.3V)
•Load transient response ILoad = 0.5A ⇔ 1.0A [100μsec/div]
CH3:VOUT
[20mV/div]
CH4:ILoad
[0.5A/div]
•VIN start up waveform ILoad = 0.5A
•VIN stop waveform ILoad = 0.5A
CH1:VIN
[10V/div]
CH1:VIN
[10V/div]
CH2:SS
[2.0V/div]
CH2:SS
[2.0V/div]
CH3:VOUT
[2.0V/div]
CH3:VOUT
[2.0V/div]
•EN start up waveform ILoad = 0.5A
•EN stop waveform ILoad = 0.5A
CH1:EN
[5V/div]
CH1:EN
[5V/div]
CH2:SS
[2.0V/div]
CH2:SS
[2.0V/div]
CH3:VOUT
[2.0V/div]
CH3:VOUT
[2.0V/div]
Considerations for the design
• During use with VIN = 12V or less, the boot strap voltage may become deficient due to intermittent operation at no load,
resulting in failure of normal operation. In this case, insert a resistance of about 500Ω between VOUT and GND and
avoid the intermittent operation mode during use.
• 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.
No.A1761-8/9
LV5813TT
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
controlled under any of applicable local export control laws and regulations, such products may require the
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
mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
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
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of July, 2010. Specifications and information herein are subject
to change without notice.
PS No.A1761-9/9