Page 1
Ordering number: EN 5196
Monolithic Linear IC
LA5611
Multifunctional Voltage Regulator
for TVs and VCRs
Applications
.
Audiovisual equipment, VCRs and TVs
Package Dimensions
unit : mm
3107-SIP13H
Features
.
Low saturation type of regulator (ON/OFF function built in)
.
Control amplifier built in.
.
Current limit and thermal limit circuits built in
.
Reverse current prevention provided (VO4)
[LA5611]
SANYO : SIP13H
Specfications
Maximum Ratings atTa=25°C
Parameter Symbol Conditions Ratings Unit
V
1 max 22
Maximum input voltage
Allowable power dissipation Pd max No heat sink 2 W
Thermal resistance between
junction and case
Operating temperature Topr –20 to +80
Storage temperature Tstg –40 to +150
IN
V
2 max VIN1 ^ VIN2V
IN
θj-c 4.7
1
IN
C/W
°
V
C
°
C
°
Operating Conditions atTa=25°C
Parameter Symbol Conditions Ratings Unit
V
1 11.5 to 20 V
Input voltage
Output current 1 I
Output current 2 I
Output current 3 I
Output current 4 I
IN
V
2 6.2 to 20 V
IN
1 Within ASO of external Tr mA
O
2 10 to 480 mA
O
3 10 to 240 mA
O
4 5 to 48 mA
O
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
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92895HA (II) No.5196-1/5
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LA5611
Operating Characteristics atTa=25°C, See specified Test Circuit.
Parameter Symbol Conditions min typ max Unit
[No-load mode] V
Quiescent current
[Regulator 1] V
Output voltage 1 V
Dropout voltage V
Line regulation nV
Load regulation nV
Ripple rejection Rrej1 50 dB
Output low-level voltage V
Control output current I
Output voltage/temperature
coefficient
[Regulator 2] VEN= low, VIN1=14V,VIN2 = 6.6 V, IO2 = 400 mA
Output voltage 2 V
Dropout voltage V
Line regulation nV
Load regulation nV
Peak output current I
Output short-circuit current I
Ripple rejection Rrej2 50 dB
Output low-level voltage V
Output voltage/temperature
coefficient
[Regulator 3] VEN= high, VIN1=14V,VIN2 = 6.6 V, IO3 = 200 mA
Output voltage 3 V
Dropout voltage V
Line regulation nV
Load regulation nV
Peak output current I
Output short-circuit current I
Ripple rejection Rrej3 50 dB
Output voltage/temperature
coefficient
[Regulator 4] VEN= high, VIN1=14V,VIN2 = 6.6 V, IO4=40mA
Output voltage 4 V
Dropout voltage V
Line regulation nV
Load regulation nV
Peak output current I
Output short-circuit current I
Ripple rejection Rrej4 50 dB
Output voltage/temperature
coefficient
[Output on/off control] VIN1=14V,VIN2 = 6.6 V
Output on control voltage V
Output off control voltage V
[Control Amplifier] V
Control output current I
Resistance ratio K
= low, VIN1=14V,VIN2 = 6.6 V, IO1toIO4=0mA
EN
= low, VIN1=14V,VIN2 = 6.6 V, IO1 = 500 mA, with specified extenal transistor
EN
1=14V,VIN2 = 6.6 V
IN
I
1 816mA
IN
I
2 24mA
IN
1 8.5 9.0 9.5 V
O
1 0.8 1.6 V
DROP
112V%VIN1 % 16 V 140 mV
OLN
1 0.1 A % IO1 % 1 A 150 mV
OLD
1 OFF 0.2 V
O
110mA
CONT
nV
1/nTa ±1
O
2 4.80 5.05 5.30 V
O
2 0.5 1.0 V
DROP
26V%VIN2 % 7.2 V 20 mV
OLN
2 0.1 A % IO2 % 0.4 A 100 mV
OLD
2 480 mA
OP
2 90 240 mA
OSC
2 OFF 0.2 V
O
nV
2/nTa ±0.5
O
3 4.80 5.05 5.30 V
O
3 0.5 1.0 V
DROP
36V%VIN2 % 7.2 V 20 mV
OLN
310mA%IO3%200 mA 100 mV
OLD
3 240 mA
OP
3 40 120 mA
OSC
nV
3/nTa ±0.5
O
4 5.4 5.7 6.0 V
O
4 3.8 5.0 V
DROP
412V%VIN1 % 16 V 40 mV
OLN
410mA%IO4%40 mA 65 mV
OLD
440mA
OP
470mA
OSC
nV
4/nTa ±1
O
ENL
ENH
CONT
VO1, VO2: on 1.0 V
VO1, VO2: off 3.0 VIN1V
210mA
KR= R4/R3, Vref = 1.28 V typ 9.94
R
mV/°C
mV/°C
mV/°C
mV/°C
No.5196 - 2/5
Page 3
LA5611
Pd max — Ta
Aluminum heat sink
Infinite heat sink
No heat sink
Allowable power dissipation, Pd max — W
Ambient temperature, Ta —°C
Note 1: The tightening torque referred to in the above figure is a condition specified for the heat dissipation characteristics and not
a working condition to be met when mounting the heat sink.
Test Circuit
mounting conditions
Tightening torque: 4 kg.cm Note 1
With plain washer and
silicone grease applied
Pin Functions
No. Symbol Function
1V
2 EN Regulator 1 and regulator 2 on/off control. Low active.
3 GND Substrate of the LA5611 (minimum potential).
4V
5V
6V
7 ADJ2
8V
9 CONT1
10 ADJ1
11 PC Phase correction pin of switching regulator control amplifier.
12 CONT2 Drive output of switching regulator control amplifier.
13 V
3 5.05 V/240 mA regulator, with current limit, thermal shutdown.
O
2 5.05 V/480 mA regulator, with on/off, current limit, thermal shutdown.
O
2 Low voltage input.
IN
4 5.7 V/40 mA regulator with reverse current prevention.
O
1 Output voltage sensor of 9.0 V regulator
O
1 High voltage input.
IN
1 adjustment pin. Resistance between pin 7 and ground → VO1 up.
V
O
Resistance between pin 7 and pin 8 → V
Base control of external NPN transistor. I
the internal thermal shutdown of this regulator.
V
1 adjustment pin. Resistance between pin 10 and ground → VIN1 up.
IN
Resistance between pin 13 and pin 10 → V
1 down
O
1 = 10 mA, with on/off, thermal shutdown coupled with
CONT
1 down
IN
or
its equivalent
Phase
compensation
No.5196 - 3/5
Page 4
LA5611
Function Table (V: built in, ×: not built in)
Function
Circuit block
Input line V
Current limit × VVV ×
Thermal limit VVV ××
On/off control VV ×××
Usage Notes
(1) Apply voltages to the voltage input pins on condition that VIN1 ^ VIN2.
(2) Supply the voltages simultaneously to V
(3) Since the control circuit of regulator 1 does not have current limit protection of such as an external NPN transistor, provide
this protection in each application.
Logic Table
Conditions : when VIN1^ VIN2 (at VIN1 ^ 11.5 V, VIN2 ^ 6.2 V)
EN VO1, VO2
L or open H
HL
VO1V
1V
IN
1 and VIN2. Do not use the LA5611 with voltage applied to only one of these pins.
IN
2V
O
2V
IN
3V
O
2V
IN
4 Control
O
1V
IN
amplifier
IN
1
(1) ‘‘H’’ for EN denotes high level; ‘‘L’’ denotes low level.
(2) ‘‘H’’ for V
denotes output ON voltage; ‘‘L’’ denotes output OFF voltage.
O
Thermal Design Notes
(1) In the LA5611, the junction temperature (Tj) at which thermal shutdown is activated is approximately equal to 130°C.
(2) Consequently, the operating temperature range of REG1, REG2 and REG3 with the thermal shutdown function is restricted
by the thermal shutdown characteristics (typical value) shown in the figure below.
(3) The thermal shutdown characteristics vary ±20°C or so. Since thermal shutdown is liable to occur with inadequate heat
dissipation, sufficient consideration must be given to the heat dissipation design.
Thermal Shutdown Characteristics
Typical Characteristics
Allowable power dissipation, Pd — W
Ambient temperature, Ta —°C
No.5196 - 4/5
Page 5
LA5611
Equivalent Circuit Block Diagram and Sample Application Circuit
Converter transformer
Switching
regulator
Photocoupler
Start-up
Reverse
current
prevention
Thermal
Shutdown
detection
Error
amplifier
External Tr
Phase
compensation
Switching
regulator
control
amplifier
Application Notes
(1) Depending on the type, load current and connection position (distance from the LA5611) of the external NPN transistor, the
capacitor C7 and resistance R6 is necessary for preventing oscillation.
(2) C1 to C6 are bypass capacitors for preventing oscillation: as such, they must be positioned as close to the LA5611 as possible
in order to stabilize operation.
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of September, 1995. Specifications and information herein are subject to change without notice.
No.5196 - 5/5
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