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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
(Note) 7V 150 OC -65 OC to 150 OC 300 OC
ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) Operating Junction temperature 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. POWER DISSIPATION TABLE TA=70 OC Derating factor ( mW/ OC ) TA 25 OC O TA 25 C Power rating(mW) Power rating(mW) 22.2 22.2 22.2 22.2 12.5 12.5 2775 2775 2775 2775 1562 1562 1776 1776 1776 1776 1000 1000
Package T TF ST/ST3 ST/ST3F SJ SJF
JA ( C /W )
O
TA= 85 OC Power rating (mW) 1443 1443 1443 1443 812 812
45 45 45 45 80 80
Note: TJ = TA + (PD x JA) PD: Power dissipation. JA: Thermal resistance from Junction to Ambient. For T and ST/ST3 packages, JT = 3.0 OC / W. For SJ package, JT = 7.0 OC /W.
TJ = TTAB + (PD x JT)
TTAB: Tab temperature. JT: Thermal resistance from junction to tab of the package. 1. 2. 3. The JA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. If power consumption is over above rating, adequate heat sink is required to dissipate heat. RECOMMENDED OPERATING CONDITIONS Parameter Symbol Recommended Operating Conditions Min. Typ. Max. Input Voltage Load Current (with adequate heatsinking) Input Capacitor (VIN to GND) Output Capacitor with ESR of 10 max., (VOUT to GND) Operating Ambient Temperature Range Operating junction temperature TJ VIN IO 2.75 0.010 1 10 0 70 125 7 5
Units V A F F O C
O
C
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AMC DOC. #: AMC7585_E (LF) Feb 2005 BLOCK DIAGRAM
AMC7585
5A LOW DROPOUT REGULATOR
VIN
VOUT
THERMAL LIMIT
1.25V VREF
GND
AMC7585-X.X circuit schematic
VIN
1.25V VREF
THERMAL LIMIT
VOUT ADJ
AMC7585-ADJ circuit schematic
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VIN = VOUT + 2V, IO = 10mA. These specifications apply operating ambient temperature range, 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 AMC7585-2.5 Output Voltage AMC7585-3.3 AMC7585-5.0 AMC7585-2.5 Output Voltage AMC7585-3.3 AMC7585-5.0 Reference Voltage (Note 1) AMC7585-ADJ VREF VOI VOL V IQ IADJ ICL Imin RR (VIN - VOUT)=2V VRIPPLE = 1VPP, IO = 100mA, fO=120Hz 5.1 IO = 10mA to 5A, (Note 1) (1.5V + VOUT) VIN 7V IO = 10mA to 5A (Note 3) IO = 10mA IO = 5A VOUT IO = 10mA to 5A VOUT Symbol Test Conditions TA = 25 OC TA = 25 C TA = 25 C
O O
AMC7585 Min. Typ. Max. 2.475 3.267 4.950 2.460 3.247 4.920 1.238 1.230 2.500 3.300 5.000 2.500 3.300 5.000 1.250 1.250 0.04 0.08 1.00 1.15 8 50 6.8 5 80 2.525 3.333 5.050 2.540 3.353 5.080 1.262 1.270 0.2 0.3 1.15 1.30 13 120 10
Units
V
V
V
Line Regulation (Note 2) Load regulation (Note 2) Dropout Voltage Quiescent Current ( for AMC7585-X.X) Adjust Pin Current ( for AMC7585-ADJ) Current Limit Minimum Load Current (Note 4) Ripple Rejection (Note 5)
% % V mA A A mA dB
VIN 7V, IO = 10mA to 3A
60
Note 1 Output voltage is set to be 2.5V. Note 2: Line and load regulations are guaranteed up to maximum power dissipation determined by input/output differential and the output current. However, the maximum power will not be available over the full input/output voltage range. Note 3: The specifications represent the minimum input/output voltage required to maintain 1% regulation. Note 4: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note 5: These parameters, although guaranteed, are not tested in production prior to shipment
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
CHARACTERIZATION CURVES
CIN=10uF, COUT=22uF, TA=25 OC, unless otherwise specified.
Load Regulation
2 1.95
Load Regulation
2.6 2.58
Output Voltage (V)
Output Voltage (V)
1.9 1.85 1.8 1.75 1.7 1.65 1.6 1.55 1.5 0 1
VIN =3.8V, VOUT =1.8V
2.56 2.54 2.52 2.5 2.48 2.46 2.44 2.42 2.4
VIN =4.5V,VOUT =2.5V
2
3
4
5
0
1
2
3
4
5
Output Current (A)
Output Current (A)
Load Regulation
3 .5 3.45
Load Regulation
5.2 5.15
Output Voltage (V)
3 .4 3.35 3 .3 3.25 3 .2 3.15 3 .1 3.05 3 0 1
VIN =5.3V, VOUT =3.3V
Output Voltage (V)
5.1 5.05 5 4.95 4.9 4.85 4.8 4.75 4.7
VIN =7.0V, VOUT =5.0V
2
3
4
5
0
1
2
3
4
5
Output Current (A)
Output Current (A)
Output Voltage v.s. Temperature
2.6 2.58 2.56 2.54
Quiescent Current vs. Temperature
8
Quiescent Current (mA)
VIN =5V, VOUT=2.5V IO=10mA
7 6 5 4 3 2 -40 -20 0 20 40 60 80 100 120
VOUT(V)
2.52 2.5 2.48 2.46 2.44 2.42 2.4 -40 -20 0 20 40 60
O
IO=5A
80
100 120
Temperature (
C)
6
Temperature (OC)
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
Application Note:
The maximum power dissipation of a single-output regulator: PD(MAX) = [(VIN(MAX) - VOUT(NOM))] x IOUT(NOM) + VIN(MAX) x 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 AMC7585 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 AMC7585 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 1.2W (for TO-220/ TO-263 package, 687mW for TO-252 package, at TA=70 oC), additional heat sink is required to control the junction temperature below 125 OC. The junction temperature is: TJ = PD (JT + CS + SA ) + TA P D : Dissipated power. JT : Thermal resistance from the junction to the mounting tab of the package. CS : Thermal resistance through the interface between the IC and the surface on which it is mounted. (typically, CS < 1.0 C / W) SA : 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 SA (C / W )
59
45 1000
38 1500
33 2000
27 3000
24 4000
21 5000
PCB heat sink size (mm2) 500
Recommended figure of PCB area used as a heat sink.
through hole vias
(Top View)
(Bottom View)
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
3-Pin Plastic TO-220 (T)
INCHES MIN
E P Q H1 A F SEATING PLAN
MILLIMETERS MAX 0.190 0.070 0.045 0.045 MIN 3.56 1.14 0.51 0.30 TYP MAX 4.83 1.78 1.14 1.14 16.51 10.67 2.79 5.33 1.40 6.86 2.92 14.73 4.09 3.43 6.35
TYP -
A
0.140
b1 0.045 b 0.020 0.012
D
c
D 0.560 E e
L1
0.650 14.22 0.420 0.110 0.210 0.055 9.65 2.29 4.83 0.51 5.84 2.03 12.7 3.53 2.54 -
0.380 0.090
e1 0.190 F
L
0.020 -
H1 0.230 J1 0.080 L
b1 e e1 b c J1
0.270 0.115 0.580 0.161 0.135 0.250
0.500 0.139
P
Q 0.100 L1 -
3-Pin Surface Mount TO-263 (ST)
INCHES MIN
E A c2
MILLIMETERS MAX 0.190 0.039 0.055 MIN 4.06 0.51 1.14 TYP 0.38 TYP. 1.14 8.64 9.65 1.40 9.65 10.29 MAX 4.83 0.99 1.40
TYP -
A b
0.160 0.020
b2 0.045
D L
c
0.015 TYP. 0.055 0.380 0.405
c2 0.045 D 0.340
L3
E
L1 c
0.380
e L
0.100 BSC 0.575 -
2.54 BSC 15.88 2.79 2.92 1.78
b e b2
0.625 14.61 0.110 0.115 0.070 2.29 1.27
L1 0.090 L2 -
L3 0.050
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
3-Pin Surface Mount TO-263 (ST3)
INCHES
E A c2
MILLIMETERS MAX 0.190 0.039 0.055 MIN 4.06 0.51 1.14 TYP 0.38 TYP. 1.14 8.64 9.65 1.40 9.65 10.29 MAX 4.83 0.99 1.40
MIN A b 0.160 0.020
TYP -
b2 0.045
D L
c
0.015 TYP. 0.055 0.380 0.405
c2 0.045 D 0.340 E
L1
0.380
e L
0.100 BSC 0.575 -
2.54 BSC 15.88 2.79 2.92
0.625 14.61 0.110 0.115 2.29 -
b
c
L1 0.090 L2 -
e
b2
3-Pin Surface Mount TO-252 (SJ)
INCHES
E b2 L2
SEATING PLAN
MILLIMETERS MAX 0.094 0.050 0.215 0.023 0.023 0.220 0.265 MIN 2.18 1.02 5.21 0.46 0.46 5.33 6.35 TYP 0.61 2.29 BSC 4.58 BSC 9.40 0.51 0.64 1.52 10.41 1.02 2.03 MAX 2.39 1.27 5.46 0.58 0.58 5.59 6.73
A A1 c1
MIN A 0.086
TYP 0.024 -
A1 0.040 b -
b2 0.205
D H
c
0.018
c1 0.018 D 0.210
L1 b e1 L
E
e c
0.250
e e1
0.090 BSC 0.180 BSC 0.410 0.040 0.080
H 0.370 L 0.020
L1 0.025 L2 0.060
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AMC DOC. #: AMC7585_E (LF) Feb 2005
AMC7585
5A LOW DROPOUT REGULATOR
IMPORTANT NOTICE
ADD Microtech (ADDM) 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. ADDM 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 ADDM 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. ADDM assumes to no liability to customer product design or application support. ADDM warrants the performance of its products to the specifications applicable at the time of sale.
U.S.
ADD Microtech Inc. 492 Altamont Drive Milpitas, CA 95035 T E L : (408) 9410420 F A X : (408) 9410864
Asia Pacific region
ADD Microtech Corp 13F, NO. 287, Sec. 3, Nan Jing E. Rd., Taipei, Taiwan 105 T E L : 2-27132800 F A X : 2-27132805
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