LA5693D, 5693S, 5693M
Ordering number : EN2769B
Voltage Regulator Driver
with Watchdog Timer
Monolithic Linear IC
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
D0597HA (KT)/8199YT/4268TA, TS No.2769-1/6
Overview
The LA5693 is a single-chip voltage regulator for
microcomputer system monitor use that performs the
functions of 5V output voltage control, watchdog timer,
and voltage detector. Since the LA5693 can hold the reset
output, it is especially suited for use in peripheral control
and monitor output applications (example : valves used in
refrigeration equipment, hot water supply system).
Applications
Microcomputer system for car equipment, refrigeration/
heating equipment, office automation equipment.
Functions
Output voltage 5V control.
Watchdog timer.
Power-ON reset function.
Reset hold output [RES (2)] (Cleared with CK reinput).
Features
An external PNP transistor can be used to provide a low-
saturation voltage regulator.
Since the CK input has no edge detector, a high degree of
flexibility is allowed in applications.
Variable detection voltage.
The watchdog time can be made longer.
Package Dimensions
unit: mm
3001B-DIP8
[LA5693D]
SANYO : DIP8
1
4
8
5
3.0
3.2
0.25
7.62
6.4
3.9max
0.51min
9.4
0.89
2.54
1.4
0.5
unit: mm
3017B-SIP9
[LA5693S]
SANYO : SIP9
0.99
0.25
1.35
3.0
22.3
0.51
min
5.7
max
3.2
1.5
4.8
1.0
2.54
1.3
0.5
1
9
unit: mm
3032B-MFP8
[LA5693M]
SANYO : MFP8
1
8
4
5
0.645
1.27
0.35
5.1
0.15
1.8max
1.5
0.1
0.625
4.4
5.15
6.4
Specifications
Maximum Ratings
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Control pin voltage
V
CONT
max
1s
60
V
Control pin voltage
V
CONT
max
41
V
Control pin current
I
CONT
max
*V
CC
6V
11
mA
CK input voltage
V
CK
max
25
V
Reset pin voltage
V
RES(1)
max,
41
V
V
RES(2)
max
Allowable power dissipation
Pd max
LA5693D, 5693S
500
mW
LA5693M
370
mW
Operating temperature
Topr
40 to +85
C
Storage temperature
Tstg
55 to +150
C
* : A PNP transistor is connected to the LA5693D, 5693S externally to provide a low-saturation voltage regulator.
Therefore, I
CONT
100mA will flow, as starting current, in the V
CC
range where the output cannot be regulated.
Operating Conditions
at Ta=25C
Parameter
Symbol
Conditions
Ratings
Unit
Control pin voltage
V
CONT
6 to 40
V
Control pin current
I
CONT
max
10
mA
Reset output current
I
RES(1)
max,
External R pull-up
8
mA
I
RES(2)
max
Reset detection voltage
V
S
min
4
V
Operating Characteristics
at Ta=25C, V
CC
=14V, I
O
=50mA, unless otherwise specified.
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
Output voltage
V
O
4.8
5.0
5.2
V
Line regulation1
V
OLN
1
9V
V
CC
16V
2
10
mV
Line regulation2
V
OLN
2
6V
V
CC
40V
4
30
mV
Load regulation
V
OLD
1mA
I
O
50mA
4
30
mV
Current dissipation
I
CC
I
O
=0
4.4
6.5
mA
Output noise voltage
V
NO
10Hz
f
100kHz, V
CK
=0
150
V
Temperature coefficient
V
O
/
Ta
I
O
=5mA, 40C
Ta
+85C
0.2
mV/C
of output voltage
Reference voltage
V
REF
1.13
1.18
1.23
V
`H'-level CK input voltage
V
IH
2
V
`L'-level CK input voltage
V
IL
0.8
V
`H'-level CK input current
I
IH
V
CK
=5V
0.3
0.7
mA
`L'-level CK input current
I
IL
V
CK
=0V
1.0
0.1
A
`H'-level reset output voltage
V
ORH(1)
/
RES(2) : 10k
pull-up
4.8
5.0
5.2
V
V
ORH(2)
`L'-level reset output voltage1 V
ORL(1)
1/
RES(2) : 10k
pull-up
40
200
mV
V
ORL(2)
1
`L'-level reset output voltage2 V
ORL(1)
2/
I
RES(1)
=I
RES(2)
=8mA
0.16
0.8
V
V
ORL(2)
2
CK input pulse width
t
CKW
V
CK
=5V
3
s
Reset output delay time
t
d
C
t
=1F
7.5
10
12.5
ms
Watchdog time
t
WD
C
t
=1F
30
40
50
ms
Watchdog reset time
t
WR
C
t
=1F
0.1
0.25
0.4
ms
Reset hysteresis voltage
Vhys
V
S
=4.5V
100
200
300
mV
LA5693D, 5693S, 5693M
No.2769-2/6
LA5693D, 5693S, 5693M
No.2769-3/6
Pin Assignment
Unit (resistance :
, capacitance : F)
Equivalent Circuit Block Diagram
RES(1) : Contains a pull-up resistor of 10k
.
RES(2) : Open collector
Test Circuit
Starter
Error
amp
Voltage detector
Reset
generator
Top view
Do not use the NC pin.
LA5693D, 5693S, 5693M
No.2769-4/6
Sample Application Circuit
Note on application
1. For stable operation, place C
in
, C
O
, and TR1 as near to the IC as possible.
2. When used in 0C or below it, a capacitor of which impedance at high-frequency operation is low and has a good
temperature characteristic (such as SANYO OS-CON capacitor or others) should be used to prevent oscillation.
3. Set V
S
to the output voltage level where the circuit will be reset using external resistors R1 and R2. V
S
should be set
to 4V or greater due to internal circuit operation.
4. C
CK
must be inserted to cut the high range element of clock noise to prevent it from becoming a reset output noise.
5. For Ct, a capacitor which less varies the capacitance according to the temperature should be used.
Timing Chart
Digital output at I/O
port of microcomputer
Microcomputer
operation start
Note : Edge-triggered at the point indicated by the arrow of C
K
signal.
CPU
abnormality
Unit (resistance :
, capacitance : F)
Application of power
Instantaneous drop
LA5693D, 5693S, 5693M
No.2769-5/6
Ambient temperature, Ta C
Allowable power dissipation, Pd max mW
Output voltage, V
O
V
Reset output voltage, V
RES
V
Supply voltage, V
CC
V
Current drain, I
CC
mA
Frequency, f Hz
Ripple rejection, R
rej
dB
Ambient temperature, Ta C
Reset output delay time, t
d
ms
Watchdog time, t
WD
ms
Ambient temperature, Ta C
Current drain, I
CC
mA
Ambient temperature, Ta C
Output voltage, V
O
V
Supply voltage, V
CC
V
Output voltage, V
O
V
Indeterminate operation
LA5693D, 5693S, 5693M
No.2769-6/6
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:
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:
Not impose any responsibilty 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 guarant-
eed 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 December, 1997. Specifications and information herein are subject
to change without notice.
Ambient temperature, Ta C
Watchdog time, t
WR
ms
Ambient temperature, Ta C
CK input current, I
IH
A
Reset output current, I
RES(2)
mA
L reset output voltage, V
ORL(2)
mV
Ambient temperature, Ta C
CK input threshold voltage, V
IN
V
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