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Ordering number : EN2770B
Monolithic Linear IC
LA5692D, 5692S, 5692M
Voltage Regulator Driver
with Watchdog Timer
Overview
Package Dimensions
The LA5692 is a single-chip voltage regulator for unit: mm
microcomputer system monitor use that performs the 3001B-DIP8
functions of 5V output voltage control, watchdog timer,
and voltage detector. Since the LA5692 can hold the reset
output, it is especially suited for use in peripheral control
[LA5692D]
85
and monitor output applications (example : valves used in
refrigeration equipment, hot water supply system).
Applications
14
9.4
• Microcomputer system for car equipment, refrigeration/
heating equipment, office automation equipment.
Functions
• Output voltage 5V control.
• Watchdog timer.
0.5 1.4
0.89 2.54
unit: mm
3017B-SIP9
• Reset generation at power-ON mode.
• Reset hold output [RES (2)] (Cleared with CK reinput).
Features
[LA5692S]
22.3
1.5
• An external PNP transistor can be used to provide a low-
saturation voltage regulator.
• CK input with edge detector.
• Variable detection voltage.
1
0.99 2.54
0.5
9
1.3
• The watchdog time can be made longer.
unit: mm
3032B-MFP8
[LA5692M]
85
SANYO : DIP8
3.0
0.25
1.35
SANYO : SIP9
14
5.1
0.15
0.35 1.27 0.645
SANYO : MFP8
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
D0597HA (KT)/8099YT/8037TA, TS No.2770-1/6

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LA5692D, 5692S, 5692M
Specifications
Maximum Ratings at Ta=25°C
Parameter
Symbol
Conditions
Ratings
Unit
Control pin voltage
VCONTmax 1s
60 V
Control pin voltage
Control pin current
VCONTmax
ICONTmax *VCC6V
41 V
11 mA
CK input voltage
VCKmax
25 V
Reset pin voltage
VRES(1)max,
VRES(2)max
41 V
Allowable power dissipation Pd max
LA5692D, 5692S
500 mW
LA5692M
370 mW
Operating temperature
Topr
–40 to +85 °C
Storage temperature
Tstg
–55 to +150 °C
* : A PNP transistor is connected to the LA5692D, 5692S externally to provide a low-saturation voltage regulator.
Therefore, ICONT100mA will flow, as starting current, in the VCC range where the output cannot be regulated.
Operating Conditions at Ta=25°C
Parameter
Symbol
Control pin voltage
Control pin current
VCONT
ICONTmax
Reset output current
Reset detection voltage
IRES(1)max,
IRES(2)max
VS min
Conditions
External R pull-up
Ratings
6 to 40
10
8
Unit
V
mA
mA
4V
Operating Characteristics at Ta=25°C, VCC=14V, IO=50mA, unless otherwise specified.
Parameter
Symbol
Conditions
Ratings
min typ max
Output voltage
Line regulation1
Line regulation2
Load regulation
Current dissipation
Output noise voltage
Temperature coefficient
VO
VOLN1
VOLN2
VOLD
ICC
VNO
VO /Ta
9VVCC16V
6VVCC40V
1mAIO50mA
IO=0
10Hzf100kHz, VCK=0
IO=5mA, –40°CTa+85°C
4.8 5.0
2
4
4
4.4
150
±0.2
5.2
10
30
30
6.5
of output voltage
Reference voltage
VREF
1.13 1.18 1.23
‘H’-level CK input voltage
‘L’-level CK input voltage
‘H’-level CK input current
VIH
VIL
IIH
VCK=5V
2
0.8
0.3 0.7
‘L’-level CK input current
IIL
‘H’-level reset output voltage VORH(1)/
VCK=0V
RES(2) : 10kpull-up
–1.0 –0.1
4.8 5.0
5.2
VORH(2)
‘L’-level reset output voltage1 VORL(1)1/
RES(2) : 10kpull-up
40 200
VORL(2)1
‘L’-level reset output voltage2 VORL(1)2/
VORL(2)2
IRES(1)=IRES(2)=8mA
0.16 0.8
CK input pulse width
Reset output delay time
tCKW
td
VCK=5V
Ct=1µF
3
7.5 10 12.5
Watchdog time
Watchdog reset time
tWD
tWR
Ct=1µF
Ct=1µF
30 40
0.1 0.25
50
0.4
Reset hysteresis voltage
Vhys
VS=4.5V
100 200 300
Unit
V
mV
mV
mV
mA
µV
mV/°C
V
V
V
mA
µA
V
mV
V
µs
ms
ms
ms
mV
No.2770-2/6

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Pin Assignment
LA5692D, 5692S, 5692M
Equivalent Circuit Block Diagram
Do not use the NC pin.
Top view
Starter
Eamrrpor
Voltage detector
Rgeenseertator
RES(1) : Contains a pull-up resistor of 10k.
RES(2) : Open collector
Test Circuit
Unit (resistance : , capacitance : F)
No.2770-3/6

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Sample Application Circuit
LA5692D, 5692S, 5692M
Unit (resistance : , capacitance : F)
Note on application
1. For stable operation, place Cin, CO, and TR1 as near to the IC as possible.
2. When used in 0°C 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 VS to the output voltage level where the circuit will be reset using external resistors R1 and R2. VS should be set
to 4V or greater due to internal circuit operation.
4. CCK 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
Application of power
Instantaneous drop
Digital output at I/O
port of microcomputer
Microcomputer
operation start
CPU
abnormality
Note : Edge-triggered at the point indicated by the arrow of CK signal.
No.2770-4/6

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LA5692D, 5692S, 5692M
Ambient temperature, Ta – °C
Supply voltage, VCC – V
Indeterminate operation
Output voltage, VO – V
Ambient temperature, Ta – °C
Supply voltage, VCC – V
Ambient temperature, Ta – °C
Frequency, f – Hz
Ambient temperature, Ta – °C
No.2770-5/6