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PDF LA5683T Data sheet ( Hoja de datos )

Número de pieza LA5683T
Descripción Monolithic Linear IC 4ch Switching Regulator Control IC
Fabricantes Sanyo Semicon Device 
Logotipo Sanyo Semicon Device Logotipo



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No Preview Available ! LA5683T Hoja de datos, Descripción, Manual

Ordering number : EN8214
Monolithic Linear IC
LA5683T 4ch Switching Regulator Control IC
Overview
The LA5683T is 4ch switching regulator control IC.
Functions
Low-voltage operation (minimum 1.8V).
OUT1 and OUT2 can drive external PNP transistors.
OUT3 and OUT4 can drive external NPN transistors.
4-independent-channel standby circuit built-in.
• ±1% accuracy reference voltage.
Supports MOS transistor drive.
Channel 2 dead time internally set fixed, duty cycle = 100%.
(The dead time for channels 1, 3, and 4 are set externally.)
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Supply voltage 1
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Topr
Tstg
Conditions
Independent IC
Ratings
9
0.4
-20 to +85
-55 to +150
Unit
V
W
°C
°C
Operating Conditions at Ta = 25°C
Parameter
Supply voltage 1
Supply voltage 2
Output sync current
Reference voltage output current
Timing resistor
Timing capacity
Triangular wave frequency
Symbol
VCC
VBIAS
ISINK max
IREF
RT
CT
fOSC
Conditions
Ratings
1.8 to 8
1.8 to 8
0 to 30
0 to 1
3 to 30
100 to 1000
0.1 to 1
Unit
V
V
mA
mA
k
pF
MHz
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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
products described or contained herein.
www.DataSheet.in
92706 / 40506 MS IM B8-7242 No.8214-1/12

1 page




LA5683T pdf
Application Circuit Examples 2
4-dry battery (3.5V to 6.5V) configuration
LA5683T
to VO2
DTC1
33
R6=1k
IN1-
30
31 FB1
C9=0.047µF
CSOFT1
32
to VO1
R9=1k
IN2-
7
FB2
6
C11=0.047µF
CSOFT2
5
to VO3
14 DTC3
11 IN3-
R14=100
12 FB3
C13=0.047µF
CSOFT3
13
to VO4
DTC4
15
R19=100
IN4-
22
FB4
21
C15=0.047µF
CSOFT4
20
GND
18
25
SCP
28
VREF
++ --
-+
VCC 9
CAPH1
34
CAPL1
35
OUT1
36
++ --
-+
++ ++
--
CAPH2
4
CAPL2
3
OUT2
2
VS
1
VBIAS
16
OUT3
17
++ ++
--
OUT4
19
STBY
OSC
29 8 10 23
27 24 26
VCC
Q3 : MCH3309
L7 : 47µH
D6 : SBS004
VO2=1.5V/200mA
Q2 : MCH3309
L4 : 22µH
D5 : SBS004
VO1=3.3V/500mA
D2 : SBS005
T1 4
1 3 D1 :
2 SBS004
6
7, 8
5
D3 : SBS004
Q1 : MCH3409
VO3A=15V/15mA
VO3=3.3V/140mA
VO3B=-7.5V/10mA
L9 : 10µH D7 : SBS005
Q102 : CPH3308 VO4=12V/100mA
Q4 : MCH3409 to STBY4
Q103 :
CPH3215
ILA07051
T1 = Sumida product
L4 = TDK product: RLF5018-220MR63
L7 = Toko product: 636CY-470M
L9 = Toko product: 636CY-100M
www.DataSheet.in
No.8214-5/12

5 Page





LA5683T arduino
Sample Circuit That Makes Use of VBIAS (2)
LA5683T
This IC can be used to implement the circuit that is shown below since the power to the channels 3 and 4 output stages
is supplied via VBIAS.
Apply the power voltage to VBIAS through the path that is made up of VCC, L to Schottky diode (through path formation).
Then feed the stabilized voltage VO3 that is raised to 3.3V in channel 3 to VBIAS.
A voltage of approx. VBIAS3-1 volt develops at VOUT3, so that the IC can drive MOS transistors in a low-voltage
environment like this sample circuit.
VBIAS
Fed to VBIAS
Schottky barrier diode
VCC
OUT3
L
VO3=3.3V
SW
VOUT3
MCH3409
to IN3
VBIAS Circuit Example 2
Using the IC in a Step-down Circuit (CH1 and CH2)
The IC detects a short-circuit condition and activates the SCP when VCC falls below the preset voltage VO+VF in such
a step-down application as the one shown below.
VCC
OUT
VF (diode forward voltage)
VO1
VO1
VF IN+
VCC
SCP activated
1.8V
When stepping down VCC<V0+VF
VCC
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No.8214-11/12

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