AMC D
OC
. #:AMC7638_F(LP)
March 2004
A
DD MICROTECH CORP.
DESCRIPTION
AMC7638
450mA L
OW
D
ROP
O
UT
R
EGULATOR
FEATURES
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.
2% internally trimmed output
Output current is excess of 450mA
Input-Output differential of typ. 360mV
at 300mA & low quiescent current of
10µA typical
P-MOS output stage with low Rds
ON
.
Short circuit protection
Internal thermal overload protection
Enhanced pin-pin compatible to the
XC62FP series
Available in 3-Lead TO-92 and surface
mount SOT-89 packages
PACKAGE PIN OUT
3.
V
OUT
2.
V
IN
1.
GND
3.
V
IN
2.
GND
1.
V
OUT
(AMC76382-X.XPK)
APPLICATIONS
CD ROM, DVD
Wireless Communication Systems
Digital Camera
Battery Powered Applications
(AMC76381-X.XPK)
Voltage Options:
AMC76381-1.5 – 1.5V 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
T
A
(
O
C)
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3.
V
OUT
2.
V
IN
1.
GND
(AMC76381-X.XLP)
3.
V
IN
2.
GND
1.
V
OUT
(AMC76382-X.XLP)
3.
V
OUT
2.
GND
1.
V
IN
(AMC76383-X.XLP)
3-Pin Plastic TO-92
(Top View)
ORDER INFORMATION
3-Pin Plastic TO-92
(Top View)
3-Pin Plastic TO-92
(Top View)
Plastic SOT-89
LP
Plastic TO-92
3-pin
3-pin
AMC76381-X.XPK
AMC76381-X.XLP
AMC76381-X.XPKF (Lead Free)
AMC76381-X.XLPF (Lead Free)
AMC76382-X.XPK
AMC76382-X.XLP
-40 to 85
AMC76382-X.XPKF (Lead Free)
AMC76382-X.XLPF (Lead Free)
--
AMC76383-X.XLP
--
AMC76383-X.XLPF (Lead Free)
Note: 1.All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e.
AMC76381-X.XPKT).
2. For TO-92 in Tape & Box (without reel), add suffix “TB” (i.e. AMC76381-X.XLPTB).
3. The letter ”F” is marked for Lead Free process.
PK
Copyright
2004, ADD Microtech Corp.
1
www.addmtek.com
AMC D
OC
. #: AMC7638_F(LP)
March 2004
AMC7638
450mA L
OW
D
ROP
O
UT
R
EGULATOR
TYPICAL APPLICATION
V
IN
V
OUT
AMC7638
C
IN
1µF
C
OUT
4.7µF
ABSOLUTE MAXIMUM RATINGS
(Note)
13V
Input Voltage, V
IN
150
O
C
Maximum Operating Junction Temperature, T
J
Storage Temperature Range
-65
O
C to 150
O
C
Lead Temperature (soldering, 10 seconds)
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.
POWER DISSIPATION TABLE
T
A
=70
O
C
T
A
= 85
O
C
Derating factor (mW/
O
C )
T
A
≤
25
O
C
T
A
≥
25
O
C
Power rating (mW) Power rating (mW) Power rating (mW)
6.41
6.41
14.1
14.1
801
801
1763
1763
513
513
1128
1128
417
417
916
916
Package
LP
LPF
PK
PKF
θ
JA
( C/ W )
O
156
156
71(Note)
71(Note)
Note:
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
2004, ADD Microtech Corp.
2
www.addmtek.com
AMC D
OC
. #: AMC7638_F(LP)
March 2004
AMC7638
450mA L
OW
D
ROP
O
UT
R
EGULATOR
BLOCK DIAGRAM
V
IN
Current
Limiter
V
OUT
V
REF
GND
RECOMMENDED OPERATING CONDITIONS
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Input Voltage
V
IN
3.0
10
Load Current (with adequate heat sinking)
I
O
5
450
Input Capacitor (V
IN
to GND)
0.1
Output Capacitor with ESR of 10Ω max., (V
OUT
to GND)
1.0
Operating ambient temperature range
Operating junction temperature
T
A
T
J
-40
85
125
Units
V
mA
µF
µF
O
O
C
C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
IN
= V
OUT(TYP)
+
1V, I
O
= 10mA, C
OUT
= 4.7µF, T
A
=25
O
C, and are for DC characteristics only.
(Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient
temperature.)
Parameter
Output Voltage
Line Regulation
Load regulation
AMC7638X-1.5
AMC7638X-2.5
AMC7638X-3.3
Symbol
V
O
∆V
OI
∆V
OL
Test Conditions
I
O
= 10mA
V
IN
= (V
OUT
+
0.5V) to 8V
10mA
≤
I
O
≤100mA
10mA
≤
I
O
≤
300mA
10mA
≤
I
O
≤
450mA
I
O
= 100mA
I
O
= 300mA
I
O
= 450mA
I
O
= 10mA~450mA
V
IN
= V
OUT
+ 0.5V
I
O
=100mA, -40
O
C
≤
T
J
≤
125
O
C
AMC7638
Min
Typ
Max
1.470 1.500 1.530
2.450 2.500 2.550
3.234 3.300 3.366
0.1
0.3
30
15
80
45
140
95
120
180
360
540
540
810
8
20
450
±100
Units
V
%/V
mV
Dropout Voltage
Ground Pin Current
Current Limit
Output Voltage Temperature Coefficient
∆V
I
Q
I
CL
mV
µA
mA
ppm/
O
C
Copyright
2004, ADD Microtech Corp.
3
www.addmtek.com
AMC D
OC
. #: AMC7638_F(LP)
March 2004
AMC7638
450mA L
OW
D
ROP
O
UT
R
EGULATOR
CHARACTERIZATION CURVES
Typical Performance Characteristics
(V
IN
=5V，C
IN
=1µF，C
OUT
=4.7µF，T
A
=25
O
C unless otherwise specified.)
Load Regulation
3.5
3.4
3.3
V
O
(V)
AMC7638X-3.3
Line Regulation
3.5
3.4
AMC7638X-3.3
3.2
3.1
3
2.9
2.8
0
100
200
300
400
500
V
O
(V)
3.3
3.2
3.1
3
3.5 4.5 5.5 6.5 7.5 8.5 9.5 10.5
I
O
(mA)
V
IN
(V)
Dropout vs. Load Current
0.6
0.5
Output Voltage vs. Temperature
3.5
3.4
3.3
AMC7638X-3.3
Dropout voltage (V)
Io=10mA
Io=100mA
Io=300mA
Io=450mA
V
O
(V)
0.4
0.3
0.2
0.1
0
0
100
200
300
400
500
I
O
(mA)
3.2
3.1
3
2.9
2.8
-40
-20
0
20
40
O
60
80
100
120
T
A
(
C
)
Dropout vs. Temperature
0.5
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
-40
-20
0
20
Current Limit vs. Supply Voltage
2
Dropout voltage (V)
Io=300mA
Current limit (A)
100 120
1.6
1.2
0.8
0.4
0
Io=100mA
40
O
60
80
4
5
6
7
8
9
10
T
A
(
C
)
V
IN
(V)
Copyright
2004, ADD Microtech Corp.
4
www.addmtek.com
AMC D
OC
. #: AMC7638_F(LP)
March 2004
AMC7638
450mA L
OW
D
ROP
O
UT
R
EGULATOR
CHARACTERIZATION CURVES
(Continued)
Typical Performance Characteristics
V
IN
= 5V，C
IN
=1µF，C
OUT
= 4.7µF，T
A
=25
O
C unless otherwise specified.
Quiescent Current vs. Load
14
12
Quiescent Current vs. Temperature
20
18
16
14
12
10
8
6
4
2
0
-40 -20
0
20 40 60 80 100 120
I
Q
(μA)
10
8
6
4
0
100
200
300
400
500
I
Q
(μA)
I
O
(mA)
T
A
(
C
)
O
Load Transient Response
with I
O
=300mA
150mA/Div
Load Transient Response
with I
O
=100mA
50mA/Div
I
O
V
O
I
O
V
O
20mV/Div
100mV/Div
Time: 20µs/ Div
Time: 20µs/ Div
Copyright
2004, ADD Microtech Corp.
5
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