ADDtek AMC76385-3.3 450ma low dropout regulator Datasheet

AMC7638
450mA LOW DROPOUT REGULATOR
www.addmtek.com
DESCRIPTION
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
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APPLICATIONS
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PACKAGE PIN OUT
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
TA (OC)
-40 to 85
Note:
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 RDS, 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
3. VIN
2. GND
1. VOUT
3. VOUT
2. VIN
1. GND
AMC76381-X.XPKF
AMC76382-X.XPKF
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3-Pin Plastic SOT-89
Surface Mount
(Top View)
3. VOUT
3. VIN
2. GND
1. VIN
2. VOUT
1. GND
AMC76383-X.XSKF
AMC76385-X.XSKF
3-Pin Plastic SOT-223
Surface Mount
(Top View)
3-Pin Plastic SOT-223
Surface Mount
(Top View)
ORDER INFORMATION
Plastic SOT-89
Plastic SOT-223
PK 3-pin
SK 3-pin
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.
Copyright © 2007 ADDtek Corp.
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AMC7638
TYPICAL APPLICATION
VOUT
VIN
AMC7638
CIN
COUT
1µF
4.7µF
(Note)
ABSOLUTE MAXIMUM RATINGS
13V
150OC
-65OC to 150OC
260OC
Input Voltage, VIN
Maximum Operating Junction Temperature, TJ
Storage Temperature Range
Lead Temperature (soldering, 10 seconds)
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
Symbol
Min.
VIN
IO
3.0
5
0.1
1.0
-40
Input Voltage
Load Current (with adequate heat sinking)
Input Capacitor (VIN to GND)
Output Capacitor with ESR of 10Ω max., (VOUT to GND)
Operating ambient temperature range
Operating junction temperature
TA
TJ
Typ.
Max.
Units
300
10
500
V
mA
µF
µF
O
C
O
C
85
125
POWER DISSIPATION TABLE
Package
θJA
( C/ W )
Derating factor (mW/OC )
TA ≥ 25OC
TA ≤ 25OC
Power rating (mW)
TA=70OC
Power rating (mW)
TA= 85OC
Power rating (mW)
PK
71(Note)
14.1
1763
1128
916
Note:
O
TJ = TA + (PD × θJA)
PD: Power dissipation.
θJA: Thermal resistance from Junction to Ambient.
For PK package, θJT = 35O C / W.
TJ = TTAB + (PD × θJT)
TTAB: Tab temperature.
θJT: Thermal resistance from junction to tab of the package.
The θJA 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
VIN
Current
Limiter
VOUT
VREF
GND
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VIN = VOUT(TYP) + 1V, IO = 10mA, COUT = 4.7µF, TA=25 OC. (Low duty cycle pulse testing techniques
are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Output Voltage
AMC7638X-1.5
AMC7638X-1.8
AMC7638X-2.5
AMC7638X-3.3
Symbol
VO
Line Regulation
∆VOI
Load regulation
∆VOL
Dropout Voltage
∆V
Ground Pin Current
Current Limit
Output Voltage Temperature
Coefficient
Copyright © 2007 ADDtek Corp.
IQ
ICL
Test Conditions
IO = 10mA
Min
Typ
Max
1.470
1.764
2.450
3.234
1.500
1.800
2.500
3.300
0.2
1.530
1.836
2.550
3.366
0.4
30
80
180
550
300
800
400
1100
20
VIN = (VOUT + 0.5V) to 10V
10mA ≤ IO ≤100mA
10mA ≤ IO ≤ 300mA
IO = 100mA
VO>2.5V
IO = 300mA
IO = 100mA
2.0V<VO≤2.5V
IO = 300mA
IO = 100mA
VO≤2.0V
IO = 300mA
IO = 10mA ~ 300mA
VIN = VOUT+ 0.5V
IO=100mA, -40 C ≤ TJ ≤ 125 C
O
3
O
15
45
100
300
150
450
200
600
8
400
V
%/V
mV
mV
µA
mA
ppm/OC
±100
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AMC7638
CHARACTERISTIC CURVES
Load Regulation
Line Regulation
3.5
3.50
AMC7638X-3.3
AMC7638X-3.3
3.45
Output Voltage (V)
Output Voltage (V)
3.4
3.3
3.2
3.1
3.0
3.40
3.35
3.30
3.25
2.9
3.20
2.8
0
100
200
300
400
3.5
500
4.5
5.5
Io (mA)
7.5
8.5
9.5
10.5
Input Voltage (V)
Dropout Voltage vs. Temperature
0.6
Output Voltage vs. Temperature
3.5
0.5
AMC7638X-3.3
3.4
Io=10mA
0.4
Output Voltage (V)
Dropout Voltage (V)
6.5
0.3
0.2
0.1
3.3
Io=100mA
3.2
3.1
Io=300mA
3.0
2.9
Io=500mA
0
0
100
200
300
400
2.8
500
Io (mA)
-40
-20
0
20
40
60
80
100 120 140
TA (oC)
Dropout Voltage vs. Temperature
Quiescent Current vs. Output
Current
0.50
14
0.45
12
Quiescent Current (uA)
Dropout Voltage
0.40
0.35
0.30
Io=300mA
0.25
0.20
0.15
10
8
6
0.10
0.05
Io=100mA
-40
-20
0
20
40
60
80
100
120
4
140
0
TA (oC)
Copyright © 2007 ADDtek Corp.
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100
200
300
Io (mA)
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AMC7638
CHARACTERIZATION CURVES (Continued)
Quiescent Current vs. Temperature
Load Transient Response
Output Voltage
Deviation ( mV)
20
20mV/Div
18
14
12
Load current ( mA)
10
8
50mA/Div
Quiescent Current (uA)
16
6
4
2
0
-40
-20
0
20
40
60
TA (oC)
80
100
Io = 50mA
VIN=5V
CIN = 1 uF
COUT = 4.7 uF
Time: 100µs/ Div
120
Io = 100mA
VIN=5V
CIN = 1 uF
COUT = 4.7 uF
Load current ( mA)
50mA/Div
20mV/Div
Output Voltage
Deviation ( mV)
Load Transient Response
Time: 100µs/ Div
Copyright © 2007 ADDtek Corp.
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AMC7638
APPLICATION INFORMATION
The maximum power dissipation of a single-output regulator
PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ
VOUT(NOM) = the nominal output voltage
IOUT(NOM) = the nominal output current, and
IQ = the quiescent current the regulator consumes at IOUT(MAX)
VIN(MAX) = the maximum input voltage
Thermal consideration
The AMC7638 series have internal power and thermal limiting circuitry designed to protect the device under
overload conditions. However maximum junction temperature ratings should not be exceeded under continuous normal
load conditions. The thermal protection circuit of AMC7638 series will prevent the device from damage due to
excessive power dissipation. When the device temperature rises to approximately 150 OC, the regulator will be turned
off.
When power consumption is over about 775mW (SOT89 package, at TA=70 OC), additional heat sink is required
to control the junction temperature below 125 OC.
The junction temperature is: TJ = PD (θJT + θCS + θSA ) + TA
P D:Dissipated power.
θJT:Thermal resistance from the junction to the mounting tab of the package.
θCS:Thermal resistance through the interface between the IC and the surface on which it is mounted.
(typically, θCS < 1.0 OC /W)
θSA:Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink).
If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of
copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with
several through hole vias.
PCB θSA (OC /W )
2
PCB heat sink size (mm )
59
45
38
33
27
24
21
500
1000
1500
2000
3000
4000
5000
Recommended figure of PCB area used as a heat sink.
through hole vias
(Top View)
Copyright © 2007 ADDtek Corp.
(Bottom View)
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AMC7638
PACKAGE
3-Pin Surface Mount SOT-89
INCHES
A
C
D
L
B
K
N
E
M
F
J
G
H
MILLIMETERS
MIN
TYP
MAX
MIN
TYP
MAX
A
0.173
-
0.181
4.39
-
4.59
B
0.090
-
0.102
2.28
-
2.59
C 0.055
-
0.063
1.39
-
1.60
D 0.015
-
0.017
0.38
-
0.43
E
0.084
-
0.090
2.13
-
2.28
F
0.016
-
0.019
0.33
-
0.48
G
0.059 BSC
1.49 BSC
H
0.118 BSC
2.99 BSC
J
0.018
-
0.022
0.45
-
0.55
K
0.155
-
0.167
3.94
-
4.24
L
0.067
-
0.072
1.70
-
1.82
M
0°
-
8°
0°
-
8°
-
0.047
0.89
-
1.19
N 0.035
3-Pin Surface Mount SOT-223 ( SK )
D
A
c
MILLIMETERS
B1
H
E
K
L
e
A1
e1
MIN
TYP
MAX
A
1.50
1.65
1.80
A1
0.02
0.05
0.08
B
0.60
0.70
0.80
B1
2.90
-
3.15
c
0.28
0.30
0.32
D
6.30
6.50
6.70
E
3.30
3.50
3.70
e
2.3 BSC
e1
4.6 BSC
H
B
7
7.00
7.30
L
0.91
1.00
1.10
K
1.50
1.75
2.00
α
0°
5°
10°
β
Copyright © 2007 ADDtek Corp.
6.70
3°
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AMC7638
IMPORTANT NOTICE
ADDtek reserves the right to make changes to its products or to discontinue any integrated circuit product or service
without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing
orders, that the information being relied on is current.
A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe
property or environmental damage. ADDtek integrated circuit products are not designed, intended, authorized, or
warranted to be suitable for use in life-support applications, devices or systems or other critical applications. Use of
ADDtek products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer’s applications, the customer should provide adequate design and operating safeguards.
ADDtek assumes to no liability to customer product design or application support. ADDtek warrants the performance of
its products to the specifications applicable at the time of sale.
ADDtek Corp.
9F, No. 20, Sec. 3, Bade Rd., Taipei, Taiwan, 105
TEL: 2-25700299
FAX: 2-25700196
Copyright © 2007 ADDtek Corp.
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