Page 1
Overview
The LA5616 is appropriate for use in power supplies for
microprocessor-controlled CD players, tuners, receivers,
and similar audio equipment.
Functions
• Low-saturation 5-V, 400-mA power supply
• 7.0-V, 1.0-A power supply
• Output reset generation function
• The 5.0-V system can be controlled (on/off) from the
provided active-high enable pin.
Features
• The reset output delay time can be set with an external
capacitor.
• Sharp-cutoff current limiter circuit and thermal
protection circuit
• Active pull-up element incorporated in reset output
circuit for improved noise suppression.
Package Dimensions
unit: mm
3018A-SIP10F
Monolithic Linear IC
93096HA (OT)No. 5286-1/5
SANYO: SIP10F
[LA5616]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Microprocessor-Controlled
Audio Power Supply
LA5616
Ordering number : EN5286
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Input voltage V
IN
max 18 V
Enable pin voltage V
EN
max VINmax V
Reset output pin voltage V
RES
max 18 V
Allowable power dissipation Pd max 2W
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –55 to +150 °C
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Input voltage V
IN
5.6 to 17 V
Output current
I
OUT
1 0 to 400 mA
I
OUT
2 0 to 1.0 A
Reset output source current I
ORH
High level 0 to 200 µA
Reset output sink current I
ORL
Low level 0 to 2 mA
Page 2
No. 5286-2/5
LA5616
Parameter Symbol Conditions
Ratings
Unit
min typ max
[5.0-V Power Supply Block] V
IN
1 = VIN2, C
OUT
2 = 47 µF
Output voltage V
OUT
1 VIN1 = 12 V, I
OUT
1 = 400 mA 4.75 5.0 5.25 V
Dropout voltage V
DROP
1 VIN1 = 4.9 V, I
OUT
1 = 400 mA 0.5 1.0 V
Line regulation ∆V
OLN
1 5.6 ≤ VIN1 ≤ 17 V, I
OUT
1 = 400 mA 20 100 mV
Load regulation ∆V
OLD
1 5 mA ≤ IO≤ 400 mA, VIN1 = 12 V 50 150 mV
Peak output current I
OP
1 VIN1 = 12 V 400 500 mA
Output shorted current I
OSC
1 VIN1 = 12 V 100 400 mA
Output noise voltage V
N
1 10 Hz ≤ f ≤ 100 kHz 70 µVrms
Output voltage temperature
∆V
O
/∆Tal Tj = 25 to 125°C 1.6 mV/°C
coefficient
Ripple rejection Rref1 f = 120 Hz, 6 V ≤V
IN
1 ≤ 17 V 60 dB
Output on control voltage V
ENH
1 VIN1 = 12 V 2.6 V
Output off control voltage V
ENL
1 VIN1 = 12 V 1.0 V
Low-level output voltage V
O OFF
1 VIN1 = 12 V 0.3 V
[Reset Block] V
IN
1 = VIN2 = 12 V
High reset output voltage V
ORHIORH
= 200 µA, Cd pin open 4.73 4.98 5.23 V
Low reset output voltage V
ORLISRL
= 2 mA, with Cd shorted to GND 100 200 mV
Reset threshold voltage V
RT
3.95 4.2 4.45 V
Reset hysteresis voltage Vhys 40 100 200 mV
Reset output delay time td Cd = 0.1 µF 7.5 10 12.5 ms
[7.0-V Power Supply Block] V
IN
1 = VIN2, C
OUT
2 = 47 µF
Output voltage V
OUT
2 VIN2 = 12 V, I
OUT
2 = 1 A 6.5 7.0 7.5 V
Dropout voltage V
DROP
2 VIN2 = 6.5 V, I
OUT
2 = 1 A 1.0 2.0 V
Line regulation ∆V
OLN
2 9.0 ≤ VIN2 ≤ 17 V, I
OUT
2 = 1 A 200 mV
Load regulation ∆V
OLD
2 5 mA ≤ IO≤ 1.0 A, VIN2 = 12 V 300 mV
Peak output current I
OP
2 VIN2 = 12 V 1.0 A
Output shorted current I
OSC
2 VIN2 = 12 V 500 mA
Ripple rejection Rref2 f = 120 Hz, 9.0 V ≤ V
IN
2 ≤ 17 V 50 dB
Output on control voltage V
ENH
2 VIN2 = 12 V 2.6 V
Output off control voltage V
ENL
2 VIN2 = 12 V 1.0 V
Low-level output voltage V
O OFF
2 VIN2 = 12 V 0.3 V
Electrical Characteristics at Ta = 25°C
Page 3
Pin Assignment
No. 5286-3/5
LA5616
Equivalent Circuit Block Diagram
Test Circuit Diagram
Page 4
Application Circuit Example
No. 5286-4/5
LA5616
Note: 1. The capacitors Cn and C
RES
are only needed when external noise is a problem.
If these capacitors are used, then capacitor Co must have a value at least 1/3 that of capacitor CIN.
A certain amount of noise may occur when VINgoes off due to differences in discharge timings between the
capacitors.
2. A capacitor with a low temperature dependence must be used for the delay capacitor Cd.
3. The minimum value for the output capacitor Co is 47 µF.
4. The input voltages must obey the relationship VIN1 ≤ VIN2, and must be brought up at the same time.
Function Table
Enable Input Equivalent Circuit
Note: Open is also possible for the VEN1 = VEN2 = high state.
(EN
1
, EN2is independent.)
EN1, EN2 VO1
L L
H H
Page 5
No. 5286-5/5
LA5616
Reset Operation
This catalog provides information as of December, 1997. Specifications and information herein are subject to
change without notice.
■ 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:
➀ 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:
➁ 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.
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