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AMC7585
www.addmtek.com DESCRIPTION The AMC7585 is a high performance low dropout regulator rated for 5A output current with fixed 2.5V/3.3V/5.0V and adjustable output. It is designed for use in applications requiring low dropout characteristics over the rated current range. On chip trimming adjusts the reference voltage to 1%. These features are ideal for low voltage microprocessor applications requiring a regulated 2.5V to 3.6V power supply. In addition, the AMC7585 provides the device protections including over current and thermal shutdown. Also, reverse battery protection scheme limits the reverse current when the input voltage falls below the output. APPLICATIONS Pentium(R) Processor Supplies PowerPCTM Supplies Computer Add-On Cards Other Applications Requiring Low Dropout Voltage Over Rated Current VOLTAGE OPTIONS AMC7585-2.5 - 2.5V Fixed AMC7585-3.3 - 3.3V Fixed AMC7585-5.0 - 5.0V Fixed AMC7585-ADJ - Adjustable
3-Pin Plastic TO-263 (ST) Surface Mount (Top View) 3-Pin Plastic TO-263-3 (ST3) Surface Mount (Top View)
5A LOW DROPOUT REGULATOR
FEATURES Output current is excess of 5A Fast transient response Reverse battery protection Short circuit protection Internal thermal overload protection Available in 3L plastic TO-220 and surface mount 3L TO-263/252 packages Pin assignment identical to EZ1585B and LT1585A series.
PACKAGE PIN OUT
3.VIN 2.VOUT 1.ADJ/GND
3-Pin Plastic TO-220 (Top View) (Top View)
3.VIN 2.VOUT 1.ADJ/GND
3-Pin Plastic TO-252 Surface Mount
3.VIN 2.VOUT 1.ADJ/GND
3.VIN 2.VOUT 1.ADJ/GND
ORDER INFORMATION TA (OC) 0 to 70 0 to 70 0 to 70 0 to 70
T
TO-220 3-pin
ST
TO-263 3-pin
ST3 3-pin
-
TO-263-3
SJ
TO-252 3-pin
AMC7585-X.XT
AMC7585-X.XST
AMC7585-X.XSJ AMC7585-X.XSJF(Lead Free) AMC7585-ADJSJ
AMC7585-X.XTF(Lead Free) AMC7585-X.XSTF(Lead Free) AMC7585-ADJT
AMC7585-ADJTF(Lead Free)
AMC7585-ADJST
AMC7585-ADJSTF(Lead Free)
AMC7585-ADJST3
AMC7585-ADJST3F(Lead Free) AMC7585-ADJSJF(Lead Free)
Note: 1. All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number (i.e., AMC7585-X.XSTT, AMC7585-X.XST3T, AMC7585-X.XSJT ). 2. The letter "F" is marked for Lead Free process.
Copyright (c) 2007 ADDtek Corp.
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AMC7585
TYPICAL APPLICATION
VIN 4V
AMC7585-X.X
VOUT 2.5V/3.3V/5V
C1 10F
C2 22F
AMC7585-X.X Application Schematic
VIN
AMC7585 - ADJ
ADJ *C1 10F R2 1% R1 1%
VOUT
** C2 22F
* REQUIRED IF REGULATOR IS LOCATED FAR FROM POWER SUPPLY FILTER
VOUT = VREF (1+(R2/R1)) + IADJR2
** DESIGN C2 AS CLOSE TO VOUT PIN AS POSSIBLE
AMC7585-ADJ Application Schematic
Copyright (c) 2007 ADDtek Corp.
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AMC7585
ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) Operating Junction temperature Storage Temperature Range Lead temperature (Soldering, 10 seconds)
(Note)
7V 150 OC -65 OC to 150 OC 300 OC
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 Package T TF ST/ST3 STF/ST3F SJ SJF JT (C /W ) 6 6 6 6 7 7 JA (C /W ) 45 45 45 45 80 80 Derating factor TA=70 C TA= 85 C TA 25 C ( mW/ C ) Power rating (mW) Power rating (mW) Power rating (mW) TA 25OC 22.2 22.2 22.2 22.2 12.5 12.5 2775 2775 2775 2775 1562 1562 1776 1776 1776 1776 1000 1000 1443 1443 1443 1443 812 812
Note: TJ = TA + (PD x JA) PD: Power dissipation. JA: Thermal resistance from Junction to Ambient. For T and ST/ST3 packages, JT = 6.0 C / W. For SJ package, JT = 7.0C /W. TJ = TTAB + (PD x JT) TTAB: Tab temperature. JT: Thermal resistance from junction to tab of the package. 1. The JA numbers are guidelines for the thermal performance of the device/PC-board system. 2. All of the above assume no ambient airflow. 3. If power consumption is over above rating, adequate heat sink is required to dissipate heat.
RECOMMENDED OPERATING CONDITIONS Parameter 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 Symbol VIN IO Recommended Operating Conditions Min. 2.75 0.010 1 10 0 70 125 Typ. Max. 7 5 V A F F O C
O
Units
C
Copyright (c) 2007 ADDtek Corp.
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AMC7585
BLOCK DIAGRAM
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
Copyright (c) 2007 ADDtek Corp.
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AMC7585
ELECTRICAL CHARACTERISTICS Unless otherwise specified, VIN = VOUT + 1.5V, 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 VOUT VIN = VOUT + 1.5V to 10V, IO = 0mA to 5A
(Note 1)
Symbol
Test Conditions
AMC7585 Min. Typ. Max. 2.475 2.500 3.300 5.000 2.500 3.300 5.000 1.250 1.250 0.04 0.2 1.30 8 50 2.525 3.333 5.050 2.550 3.366 5.100 1.262 1.270 0.2 0.4 1.50 13 120 3.267 4.950 2.450 3.234 4.900 1.238 1.230
Units
VOUT
IO = 10mA, TA = 25 C
O
V
V
AMC7585-ADJ VREF
IO = 10mA to 5A, (Note 1)
V % % V mA A A
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)
Note 1 Note 2: Note 3: Note 4: Note 5: Output voltage is set to be 2.5V.
VOI (1.5V + VOUT) VIN 7V VOL V IQ IADJ ICL Imin RR VRIPPLE = 1VPP, IO = 100mA, fO=120Hz 60 (VIN - VOUT)=2V 5.1 IO=10mA to 5A IO = 5A (Note 3) VIN 7V, IO = 10mA to 3A
6.8 5 80 10
mA dB
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. The specifications represent the minimum input/output voltage required to maintain 1% regulation. 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. These parameters, although guaranteed, are not tested in production prior to shipment
Copyright (c) 2007 ADDtek Corp.
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AMC7585
CHARACTERISTIC CURVES CIN=10uF, COUT=22uF, TA=25 OC, unless otherwise specified.
Load Regulation
2 1 .9 5
Load Regulation
2.6 2.58 2.56
VIN =3.8V, VOUT =1.8V Output Voltage (V)
VIN =4.5V,VOUT =2.5V
Output Voltage (V)
1 .9 1 .8 5 1 .8 1 .7 5 1 .7 1 .6 5 1 .6 1 .5 5 1 .5 0 1 2 3 4 5
2.54 2.52 2.5 2.48 2.46 2.44 2.42 2.4 0 1 2 3 4 5
Output Current (A)
Output Current (A)
Load Regulation
3 .5 3 .4 5 3 .4
5.2
Load Regulation
5.15 5.1
VIN =5.3V, VOUT =3.3V Output Voltage (V)
VIN =7.0V, VOUT =5.0V
Output Voltage (V)
3 .3 5 3 .3 3 .2 5 3 .2 3 .1 5 3 .1 3 .0 5 3 0 1 2 3 4 5
5.05 5 4.95 4.9 4.85 4.8 4.75 4.7
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
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
-40 -20
0
20 40
60 80 100 120
O
Temperature (
C)
Temperature ( C)
Copyright (c) 2007 ADDtek Corp.
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AMC7585
APPLICATION INFORMATION
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 C, 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 C), additional heat sink is required to control the junction temperature below 125 C. The junction temperature is: TJ = PD (JT + TS + SA ) + TA P D : Dissipated power. JT : Thermal resistance from the junction to the mounting tab of the package. (For TO-220, TO-263, and TO-263-3 packages, JT=6 C /W. For TO-252 package, JT=7C /W) TS : 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 ) PCB heat sink size (mm2) 59 500 45 1000 38 1500 33 2000 27 3000 24 4000 21 5000
Recommended figure of PCB area used as a heat sink.
through hole vias
(Top View)
(Bottom View)
Copyright (c) 2007 ADDtek Corp.
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AMC7585
PACKAGE
3-Pin Plastic TO-220 (T)
E P Q H1 A F SEATING PLAN
INCHES MIN A 0.140 TYP MAX 0.190 0.070 0.045 0.045
MILLIMETERS 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
b1 0.045
D
b c
0.020 0.012
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 0.500 0.139
0.270 0.115 0.580 0.161 0.135 0.250
b1 e e1
b
c J1
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
Copyright (c) 2007 ADDtek Corp.
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AMC7585
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
Copyright (c) 2007 ADDtek Corp.
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AMC7585
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 (c) 2007 ADDtek Corp.
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