12313NKPC CAV 20120301-S00005/32112SY No.A2033-1/8
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment. The products mentioned herein
shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life,
aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system,
safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives
in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any
guarantee thereof. If you should intend to use our products for new introduction or other application different
from current conditions on the usage of automotive device, communication device, office equipment, industrial
equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the
intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely
responsible for the use.
LA4537MC
Features
• Low current drain
• 16Ω load drive capability
• Excellent reduced voltage characteristics
• Excellent power supply ripple rejection
• Minimum number of external parts required (no input capacitor, feedback capacitor required)
• Less harmonic interference in radio band
• On-chip power switch function, muting function
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max Quiescent 4.5 V
Allowable power dissipation Pd max 290 mW
Operating temperature Topr −20 to +75 °C
Storage temperature Tstg −40 to +125 °C
Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Recommended supply voltage VCC 1.5 V
Operating voltage range VCC op 0.9 to 4.0 V
Recommended load resistance RL 16 to 32 Ω
Monolithic Linear IC
Power Amplifier For 1.5V
Head
p
hone Stereos
Orderin
g
numbe
r
: ENA2033A
LA4537MC
No.A2033-2/8
Electrical Characteristics at Ta = 25°C, RL = 16Ω, Rg = 600Ω, See specified Test Circuit.
Ratings
Parameter Symbol Conditions min typ max
Unit
ICCO1 VCC = 1.2V, quiescent 3.5 6.0 mA
ICCO2 VCC = 2.5V, pin 10 → GND 1.4 2.5 mA
Quiescent current
ICCO3 VCC = 2.5V, pin 1 → GND 1.0 μA
Voltage gain VG VCC = 1.2V, f = 1kHz, VO = −20dBm 28.5 30.0 31.5 dB
Voltage gain difference ΔVG VCC = 1.2V, f = 1kHz, VO = −20dBm 1.0 dB
Total harmonic distortion THD VCC = 1.2V, f = 1kHz, PO = 0.5mW 0.5 1.5 %
Output power PO V
CC = 1.5V, f = 1kHz, THD = 10% 5 8 mW
Crosstalk CT VCC = 1.2V, f = 100Hz, Rg = 1kΩ,
VO = −20dB 40 45 dB
Ripple rejection SVRR VCC = 1.0V, f = 100Hz, Rg = 1kΩ,
VR = −30dBm, BPF = 100Hz 40 46 dB
Output noise voltage VNO V
CC = 2.5V, Rg = 1kΩ, BPF = 20Hz to 20kHz 55 80 μV
Power on current sensitivity I1 (on) VCC = 0.85V, V5 ≥ 0.5V 0.1 1.0 μA
Power off voltage sensitivity V1 (off) VCC = 0.85V, V5 ≤ 0.1V 0.5 0.6 V
Muting off current sensitivity I10 (off) VCC = 0.85V, V5 ≥ 0.5V 0.1 1.0 μA
Muting on voltage sensitivity V10 (on) VCC = 0.85V, V5 ≤ 0.1V 0.5 0.6 V
Note) The quiescent curre nt is resprese nted by the current flow ing into pin 6. Th e respectiv e maximum currents flow ing into pin 1 and pin 10 are calculated by
(pin voltage -0.5) / 16 [V/kΩ] and the total current increases by these current values.
Package Dimensions
unit : mm (typ)
3426
SANYO : SOIC10
5.0
4.4
6.4
610
51
0.835
0.15
0.37
0.35
1.0
0.175 1.5 1.75 MAX
LA4537MC
No.A2033-3/8
Block Diagram
Test Circuit
V10
I10
V1
I1
A
6
1
2
2
2
2
3
4
SG
P/SW P/SW MT/SW
MT/SW
GND
POWER
OUT 2
OUT 1
IN 1
IN 2
PRE GND
LA4537MC
REF
1
1
1
3
4
5
7
8
12
3
DC RIPPLE
4
9
10
VCC
ICC
VCC
Rg
RL
VR
RL
Rg
+
+
+
+
Sample Application Circuit 1
(Standard)
6
1
2
OFF
ON
SG SG
P/SW P/SW MT/SW
MT/SW
GND
POWER
OUT 2
OUT 1
IN 1
IN 2
PRE GND
LA4537MC
REF
3
4
5
7
8
ON
OFF
9
10
VCC
VR
VR
VCC
RL
RL
+
+
+
+
+
12
LA4537MC
No.A2033-4/8
Sample Application Circuit 2
(Output capacitor shared)
6
1
2
OFF
ON
SG SG
P/SW P/SW MT/SW
MT/SW
GND
POWER
OUT 2
OUT 1
IN 1
IN 2
PRE GND
LA4537MC
REF
3
4
5
7
8
ON
OFF
9
10
VCC
VR
VR
VCC
RL
RL
+
+
+
+
12
LA4537MC
No.A2033-5/8
THD --
P
O
0.1
2
3
1
5
7
2
3
10
5
7
2
3
5
7
2
4
6
8
10
2
4
6
100
0.1
2
3
5
7
1
2
3
5
7
2
3
5
7
10
100
0.1 23 57 23 57 23 5723 57
1
1 1.5 2 2.5 3 3.5 1 1.5 2 2.5 3 3.5
2357 2357 23 57 2357
0.1 1 10
23 10
57 2 3 57 2 3 57 2 3 57
1
1 1.5 2 2.5 3 3.5
10
10 10
Output power, PO-- mW
THD --
P
O
Total harmonic distortion, THD -- %
0.1
Supply voltage, VCC -- V
PO-- VCC
Output power,
P
O--
m
W
0
12
0.5 4
Supply voltage, VCC -- V
PO-- VCC
Output power, PO-- mW
0
8
0.5 4
Output power, PO-- mW
Total harmonic distortion, THD -- %
2
3
5
7
2
3
5
7
1
0.4
0.6
0.8
1
Frequency, fin -- kHz
THD -- fin
Total harmonic distortion, THD -- %
0.1
10
0.01 100 Supply voltage, VCC -- V
THD -- V CC
Total harmonic distortion, THD -- %
0.2
1.2
0.5 4
50
100
150
20
40
60
80
Output power, PO-- mW/ch
Pd -- PO
Power dissipation, Pd --
m
W
0
200
1100
Output power, PO-- mW/ch
ICCOP -- PO
Supply current, ICCOP -- mA
0
100
1 100
VCC=0.9V
VCC=1.2V
VCC=3V
VCC=1.5V
fin=100Hz
fin=10kHz
fin=1kHz
fin=100Hz
THD=10%
THD=1%
THD=10%
THD=1%
fin=10kHz
fin=1kHz
VCC=1.2V
RL=16Ω
PO=0.5mW
RL=16Ω
fin=1kHz
RL=16Ω
RL=16Ω
fin=1kHz
RL=32Ω
fin=1kHz
VCC=1.2V
RL=32Ω
PO=0.5mW
fin=1kHz
RL=16Ω
VCC=3V
fin=1kHz
RL=16Ω
LA4537MC
No.A2033-6/8
Vg -- fin
20
25
30
35
55
60
65
50
60
70
80
90
40
25
27.5
30
32.5
35
0.01 23 57 23 57 1 1.5 2 2.5 3.5
123 57 23 57
100.1
1 1.5 2 2.5 3 3.5 1
23 57 10
2 3 57 2 3 57
2357 23 57 2357 23 57
0.1 1 10
23 10
57 23 57 23 57 23 57
3
1 1.5 2 2.5 3 3.5
10
100 4
Supply voltage, VCC -- V
Vg -- VCC
Voltage gain, Vg -- dB
0.5
Supply voltage, VCC -- V
Vno -- VCC
Output noise voltage, Vno --
µ
Vrms
50
70
0.5 4
Signal source resistance, Rg -- kΩ
Vno -- Rg
Output noise voltage, Vno -- µVrms
40
100
0.1 100
Frequency, fin -- kHz
Voltage gain, Vg -- dB
40
50
40
45
50
Frequency, fin -- kHz
CT -- fin
Crosstalk, CT -- dB
30
60
0.01 100
Supply voltage, VCC -- V
CT -- VCC
Crosstalk, CT -- dB
35
55
0.5 4
30
40
50
60
2
3
5
7
2
3
5
7
100
Capacitance, Cref -- µF
CT -- Cre f
Crosstalk, CT -- d
B
20
70
1100
Capacitance, Cref -- µF
AMP On-time -- Cref
On-time -- msec
10
1000
1100
VCC=1.2V
VO=-20dBm
RL=16Ω
Cout=220µF
VO=-20dBm
fin=1kHz
RL=16Ω
Cout=220µF
VCC=1.2V
VO=-20dBm
Rg=1kΩ
RL=16Ω
VCC=1.2V
VO=-20dBm
f=100Hz
Rg=1kΩ
RL=16Ω
VCC=1.2V
RL=16Ω
VO=-20dBm
fin=100Hz
Rg=1kΩ
RL=16Ω
Rg=1kΩ
RL=16Ω
VCC=2.5V
RL=16Ω
LA4537MC
No.A2033-7/8
SVR
R
-- Cref
30
40
50
60
35
40
45
50
55
--100
--95
--90
70
35
40
45
50
55
60
65
123 57 23 57 2357
10
1 1.5 2 2.5 3 3.5 0.1
23 57 1
23 57 10
23 57 23 57
1 1.5 2 2.5 3 3.5
1 1.5 2 2.5 3 3.5
0.1 23 57123 57 23 57
10
11.50.5 2 2.5 3 43.5
100 100
Frequency, f -- kHz
SVR
R
-- f
SVRR -- dB
0.01
Supply voltage, VCC -- V
SVRR -- VCC
SVRR -- dB
30
60
0.5 4
Frequency, fin -- kHz
VMT -- fin
Mutting level, VMT -- dBm
--105
--85
0.01 100
Capacitance, Cref -- µF
SVRR -- dB
-- 100
--95
--90
1
2
3
4
5
6
7
8
Supply voltage, VCC -- V
VMT -- VCC
Mutting level, VMT -- dB
m
-- 105
--85
0.5 4
Supply voltage, VCC -- V
ICCO -- VCC
Quiescent current drain, ICCO -- m A
0
9
04.5
0.2
0.4
0.6
0.8
Supply voltage, VCC -- V
Pin voltage -- VCC
Pin voltage -- V
0
1
0.5 4
VCC=1.0V
VR=-30dBm
f=100Hz
Rg=1kΩ
RL=16Ω
VCC=1.0V
VR=-30dBm
Rg=1kΩ
RL=16Ω
VR=-30dBm
f=100Hz
Rg=1kΩ
RL=16Ω
Vin=-10dBm
fin=100Hz
RL=16Ω
V1=0.85V
V10=0.3V
V1=0.85V
V10=0.85V
REF (5pin)
OUT (7pin, 9pin)
V1=0.85V
no load
no signal
VCC=0.9V
Vin=-10dBm
RL=16Ω
V1=0.85V
V10=0.3V
Same characteristics
during power-off mode
Same characteristics
during power-off mode
Mute off
Mute on
LA4537MC
PS No.A2033-8/8
SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd.
products described or co ntained herein.
Regarding monolithic semiconductors, if you should intend to use this IC continuously under high temperature,
high current, high voltage, or drastic temperature change, even if it is used within the range of absolute
maximum ratings or operating conditions, there is a possibility of decrease reliability. Please contact us for a
confirmation.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the author ities con cer n ed in accor dance 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 consent of SANYO Semiconductor 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 Semiconductor Co.,Ltd. product that you intend to use.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellectual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of January, 2013. Specifications and information herein are subject
to change without notice.
