AMC7638
www.addmtek.com
DESCRIPTION
The AMC7638 series is a low dropout regulator
rated for 450mA output current. Low power
consumption and high accuracy is achieved through
CMOS technology and internal trimmed reference
voltage.
The AMC7638 series consists of a high-precision
voltage reference, error correction circuit, and a current
limit output driver. The fast transient response is an
outstanding feature for applications with various loads
450mA L
OW
D
ROP
O
UT
R
EGULATOR
FEATURES
2% internally trimmed output
Input-Output differential of typ. 360mV at 300mA
& low quiescent current of 10µA in typical
P-MOS output stage with low R
DS, ON
.
Short circuit protection
Internal thermal overload protection
Enhanced pin-to-pin compatible to the XC62FP
series, RT9261/A.
3-Lead SOT-89 and SOT-223 packages.
Lead (Pb) free process
PACKAGE PIN OUT
3.
V
OUT
2.
V
IN
1.
GND
AMC76381-X.XPKF
APPLICATIONS
CD ROM, DVD
Wireless Communication Systems
Digital Camera
Battery Powered Applications
VOLTAGE OPTIONS
AMC76381-1.5 – 1.5V Fixed
AMC76381-1.8 – 1.8V Fixed
AMC76381-2.5 – 2.5V Fixed
AMC76381-3.3 – 3.3V Fixed
AMC76382-1.5 – 1.5V Fixed
AMC76382-2.5 – 2.5V Fixed
AMC76382-3.3 – 3.3V Fixed
AMC76383-1.5 – 1.5V Fixed
AMC76383-2.5 – 2.5V Fixed
AMC76383-3.3 – 3.3V Fixed
AMC76385-2.5 – 2.5V Fixed
AMC76385-3.3 – 3.3V Fixed
3.
V
IN
2.
GND
1.
V
OUT
AMC76382-X.XPKF
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3.
V
OUT
2.
GND
1.
V
IN
AMC76383-X.XSKF
3-Pin Plastic SOT-223
Surface Mount
(Top View)
3.
V
IN
2.
V
OUT
1.
GND
AMC76385-X.XSKF
3-Pin Plastic SOT-223
Surface Mount
(Top View)
T
A
(
O
C)
-40 to 85
Note:
ORDER INFORMATION
Plastic
Plastic
PK
3-pin SOT-89
SK
3-pin SOT-223
AMC76381-X.XPKF
AMC76382-X.XPKF
AMC76383-X.XSKF
AMC76385-X.XSKF
1. All surface-mount packages are available in Tape & Reel.
Append the letter “T” to part number (i.e. AMC76381-X.XPKFT, AMC76383-X.XSKFT).
2. The letter ”F” is marked for Lead Free process.
1
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Copyright
©
2007 ADDtek Corp.
AMC7638
TYPICAL APPLICATION
V
IN
AMC7638
C
IN
1µF
C
OUT
4.7µF
V
OUT
ABSOLUTE MAXIMUM RATINGS
Input Voltage, V
IN
Maximum Operating Junction Temperature, T
J
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
(Note)
13V
150
O
C
-65
O
C to 150
O
C
260
O
C
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground.
Currents are positive into, negative out of the specified terminal.
RECOMMENDED OPERATING CONDITIONS
Parameter
Input Voltage
Load Current (with adequate heat sinking)
Input Capacitor (V
IN
to GND)
Output Capacitor with ESR of 10Ω max., (V
OUT
to GND)
Operating ambient temperature range
Operating junction temperature
Symbol
V
IN
I
O
Min.
3.0
5
0.1
1.0
-40
Typ.
300
Max.
10
500
Units
V
mA
µF
µF
O
C
O
C
T
A
T
J
85
125
POWER DISSIPATION TABLE
Package
PK
Note:
θ
JA
O
( C/ W )
71(Note)
Derating factor (mW/
O
C )
T
A
≥
25
O
C
14.1
T
A
≤
25
O
C
Power rating (mW)
1763
T
A
=70
O
C
Power rating (mW)
1128
T
A
= 85
O
C
Power rating (mW)
916
T
J
= T
A
+ (P
D
× θ
JA
)
P
D
: Power dissipation.
θ
JA
: Thermal resistance from Junction to Ambient.
For PK package,
θ
JT
= 35
O
C / W.
T
J
= T
TAB
+ (P
D
× θ
JT
)
T
TAB
: Tab temperature.
θ
JT:
Thermal resistance from junction to tab of the package.
The
θ
JA
numbers are guidelines for the thermal performance of the device/PC-board system.
All of the above assume no ambient airflow.
Copyright
©
2007 ADDtek Corp.
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AMC7638
BLOCK DIAGRAM
V
IN
Current
Limiter
V
OUT
V
REF
GND
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
IN
= V
OUT(TYP)
+
1V, I
O
= 10mA, C
OUT
= 4.7µF, T
A
=25
O
C. (Low duty cycle pulse testing techniques
are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
AMC7638X-1.5
AMC7638X-1.8
AMC7638X-2.5
AMC7638X-3.3
Symbol
Test Conditions
Min
1.470
1.764
2.450
3.234
Typ
1.500
1.800
2.500
3.300
0.2
15
45
100
300
150
450
200
600
8
Max
1.530
1.836
2.550
3.366
0.4
30
80
180
550
300
800
400
1100
20
Units
Output Voltage
V
O
∆V
OI
∆V
OL
I
O
= 10mA
V
IN
= (V
OUT
+
0.5V) to 10V
10mA
≤
I
O
≤100mA
10mA
≤
I
O
≤
300mA
I
O
= 100mA
V
O
>2.5V
I
O
= 300mA
I
O
= 100mA
2.0V<V
O
≤2.5V
I
O
= 300mA
I
O
= 100mA
V
O
≤2.0V
I
O
= 300mA
I
O
= 10mA ~ 300mA
V
IN
= V
OUT
+ 0.5V
I
O
=100mA, -40
O
C
≤
T
J
≤
125
O
C
V
Line Regulation
Load regulation
%/V
mV
Dropout Voltage
∆V
mV
Ground Pin Current
Current Limit
Output Voltage Temperature
Coefficient
I
Q
I
CL
400
±100
µA
mA
ppm/
O
C
Copyright
©
2007 ADDtek Corp.
3
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AMC7638
CHARACTERISTIC CURVES
Load Regulation
3.5
3.4
Line Regulation
3.50
AMC7638X-3.3
3.45
AMC7638X-3.3
3.3
3.2
3.1
3.0
2.9
2.8
0
100
200
300
400
500
Output Voltage (V)
Output Voltage (V)
3.40
3.35
3.30
3.25
3.20
3.5
4.5
5.5
6.5
7.5
8.5
9.5
10.5
Dropout Voltage vs. Temperature
0.6
0.5
Io (mA)
Input Voltage (V)
Output Voltage vs. Temperature
3.5
3.4
Dropout Voltage (V)
AMC7638X-3.3
Io=10mA
0.4
Output Voltage (V)
3.3
3.2
3.1
3.0
2.9
Io=500mA
Io=100mA
0.3
0.2
0.1
0
0
100
200
300
400
500
Io=300mA
2.8
-40
-20
0
20
40
o
Io (mA)
60
80
100 120 140
TA ( C)
Dropout Voltage vs. Temperature
0.50
0.45
0.40
14
Quiescent Current vs. Output
Current
Dropout Voltage
12
Quiescent Current (uA)
0.35
0.30
0.25
0.20
0.15
0.10
0.05
-40
-20
0
20
40
Io=100mA
Io=300mA
10
8
6
60
80
100
120
140
4
0
100
200
300
Io (mA)
400
500
TA (oC)
Copyright
©
2007 ADDtek Corp.
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AMC7638
CHARACTERIZATION CURVES
(Continued)
Quiescent Current vs. Temperature
20
18
16
Quiescent Current (uA)
Load Transient Response
Output Voltage
Deviation ( mV)
Io = 50mA
V
IN
=5V
C
IN
= 1 uF
C
OUT
=
4.7 uF
14
12
10
8
6
4
2
0
-40
-20
0
20
40
60
TA (oC)
80
100
120
20mV/Div
Time: 100µs/ Div
Load Transient Response
Output Voltage
Deviation ( mV)
20mV/Div
Io = 100mA
V
IN
=5V
C
IN
= 1 uF
C
OUT
=
4.7 uF
Time: 100µs/ Div
Copyright
©
2007 ADDtek Corp.
Load current ( mA)
50mA/Div
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Load current ( mA)
50mA/Div
