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Ordering number:ENN1402D
Monolithic Linear IC
LA5550, 5550M
Low-Voltage DC Motor Speed Controller
with Logic Circiuit
Applications
The LA5550, 5550M are low-voltage (3V min.) DC
motor speed control IC with bidirectional driver and
logic circuit. Speed control, function control of DC
motor for cassette tape recorder, tape deck, telephone
answering machine.
Package Dimensions
unit:mm
3006B-DIP16
[LA5550]
16 9
Features
• Wide operating voltage range :1.8 to 8V.
• Has a logic circuit which operates in such a manner as
2 logic inputs cause FF, REW, GOVERNOR, BRAKE
mode to occur.
• Easy to vary speed at the GOVERNOR mode.
• Turning OFF the strobe pin cause little ICC to flow
(100µA).
• Large starting torque.
18
19.2
0.71 2.54 0.48
1.2
SANYO : DIP16
unit:mm
3036B-MFP20
20
[LA5550M]
11
1 10
12.6 0.15
0.35 1.27 0.59
SANYO : MFP20
Any and all SANYO 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 representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO 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 products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
81099TH (KT)/73098HA (KT)/1100YT/9087KI/4035MY, TS No.1402-1/4

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LA5550, 5550M
Specifications
Maximum Ratings at Ta = 25˚C
Parameter
Maximum supply voltage
Allowable power dissipation
Maximum motor current
Operating temperature
Storage temperature
Symbol
VCC max
Pd max
Im max
Topr
Tstg
LA5550
LA5550M
Operating Conditions at Ta = 25˚C
Parameter
Symbol
Supply voltage range
VCC op
Operating Characteristics at Ta = 25˚C
Conditions
Conditions
Parameter
[GOVERNOR Mode (G)]
Reference voltage
Quiescent flow-in current dissipation
Shunt ratio
Residual voltage
Voltage characteristic of reference voltage
Voltage characteristic of shunt ratio
Current characteristic of reference voltage
Current chacacteristic of shunt ratio
[FF Mode]
Quiescent current dissipation
Residual voltage
[REW Mode]
Quiescent current dissipation
Residual voltage
[STOP Mode]
Quiescent current dissipation
Strobe current
Base Pull–in current
Symbol
Conditions
Vref VCC=3V, Im=100mA
Id VCC=3V, motor open
K VCC=3V, Im=50mA, 150mA
Vsat(G)
Vref /V
Vref
VCC=3V, Im=200mA
VCC=1.8 to 8V, Im=100mA
K /V
K
VCC=1.8 to 8V, Im=50mA, 150mA
Vref
Vref
/Im
VCC=3V, Im=20 to 200mA,
K
K
/Im
VCC=3V, Im=50, 100mA to 150, 200mA
Id(F)
Vast(F)
VCC=3V, motor open
VCC=3V, Im=200mA
Id(R)
Vast(R)
VCC=3V, motor open
VCC=3V, Im=200mA
Id(S)
ISTB
IB1, IB2
VCC=3V (STB–ON)
VCC=3V (STB–OFF)
VCC=3V, Modes other than BRAKE
Equivalent Circuit Block Diagram
Ratings
8
1
0.42
1000
–20 to +80
–40 to +150
Unit
V
W
W
mA
˚C
˚C
Ratings
Unit
1.8 to 8 V
Ratings
min typ max
Unit
1.1 1.2
8
45 50
0.27
0.26
0.45
0.05
–0.02
1.3 V
15 mA
55
0.5 V
0.5 %/V
%/V
0.1 %/mA
%/mA
18.5
0.28
23 mA
0.5 V
18.5
0.30
23 mA
0.5 V
26 30 mA
100 200 µA
3.8 4.4 5.8 mA
No.1402-2/4

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Pin Assignments
LA5550, 5550M
Sample Application Circuit (1)
(Top view)
* Assuming RT<K•Rm
Mode
High-speed FF
GOVERNOR FF
High-speed REW
Brake
0 : 0 to 0.3V
1 : 1.8V to VCC
LR
00
01
10
11
Sample Application Circuit (2) : Bidirectional Governor
RA=2.2k
RC=50k, VR
RC=30k, VR
Turning OFF the STB pin causes ICC<100µA (at 3V).
Mode
High-speed FF
FF control
REW control
Brake
LR
00
01
10
11
No.1402-3/4

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LA5550, 5550M
Specifications of any and all SANYO 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.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or 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 products(including technical data,services) described or
contained herein are controlled under any of applicable local export control laws and regulations,
such products must not be exported without obtaining 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 permission of SANYO Electric 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 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. 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 August, 1999. Specifications and information herein are subject to
change without notice.
PS No.1402-4/4