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AMC DOC. #: AMC7584_E (LF) Feb 2005 (R)
ADD MICROTECH CORP.
DESCRIPTION
AMC7584
7A LOW DROPOUT REGULATOR
FEATURES
The AMC7584 series is a high performance low dropout regulator rated for 7A output current. It is designed for use in applications requiring low dropout characteristics over rated current range. The AMC7584 series offers fixed 2.5V, 3.3V, 5V and adjustable output voltage versions. In addition, the AMC7584 series features 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.
Input-Output differential of typical 1.1V at 7A and low quiescent current Output current is excess of 7A Reverse battery protection Short circuit protection Internal thermal overload protection Available in 3L plastic TO-220 and surface mount 3L TO-263 packages Pin assignment identical to EZ1585B and LT1585A series.
APPLICATIONS
PACKAGE PIN OUT
Pentium(R) Processor Supplies PowerPCTM Supplies Computer Add-On Cards Other Applications Requiring Low Dropout Voltage Over Rated Current. AMC7584-2.5 - 2.5V Fixed AMC7584-3.3 - 3.3V Fixed AMC7584-5.0 - 5.0V Fixed AMC7584-ADJ - Adjustable
VIN Vout Gnd/Adj
3-Pin Plastic TO-220 (Top View)
VIN Vout Gnd/Adj
3-Pin Plastic TO-263 Surface Mount (Top View)
ORDER INFORMATION Plastic TO-263 Plastic TO-220 ST 3-pin 3-pin 0 to 70 AMC7584-XXT AMC7584-XXST 0 to 70 AMC7584-XXTF (Lead Free) AMC7584-XXSTF (Lead Free) 0 to 70 AMC7584-ADJT AMC7584-ADJST 0 to 70 AMC7584-ADJTF (Lead Free) AMC7584-ADJSTF (Lead Free) Note: 1.All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number (i.e., AMC7584-X.XSTT). 2.The letter "F" is marked for Lead Free process. TA (OC)
T
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AMC DOC. #: AMC7584_E (LF) Feb 2005
AMC7584
7A LOW DROPOUT REGULATOR
TYPICAL APPLICATION
VIN 4V
AMC7584X.X
2.5V/3.3V/5V
C1 10F
C2 22F
AMC7584-X.X application schematic
VIN
AMC7584 ADJ ADJ *C1 10F R1 1% R2 1%
VOUT
**C2 22F
VOUT = VREF (1+(R2/R1)) + IADJR2
* REQUIRED IF REGULATOR IS LOCATED FAR FROM POWER SUPPLY FILTER ** DESIGN C2 AS CLOSE TO VOUT PIN AS POSSIBLE
AMC7584-ADJ application schematic
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AMC DOC. #: AMC7584_E (LF) Feb 2005
AMC7584
7A LOW DROPOUT REGULATOR
(Note 1) 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 1:
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. THERMAL DATA
T, ST PACKAGE: Thermal Resistance-Junction to Tab, JT Thermal Resistance-Junction to Ambient, JA The JA numbers are guidelines for the thermal performance of the device/pc-board system. TJ = TA + (PD x JA)., all of the above assume no ambient airflow. BLOCK DIAGRAM
VIN
3.0 OC /W 45 OC /W
VOUT
THERMAL LIMIT
1.25V VREF
GND
AMC7584-X.X circuit schematic
VIN
1.25V VREF
THERMAL LIMIT
VOUT ADJ
AMC7584-ADJ circuit schematic
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AMC DOC. #: AMC7584_E (LF) Feb 2005
AMC7584
7A LOW DROPOUT REGULATOR
Input Voltage
RECOMMENDED OPERATING CONDITIONS Parameter Symbol Recommended Operating Conditions Units Min. Typ. Max. VIN 4.0 7 V IO 0.010 1.0 10 7 A F F
Load Current (with adequate heatsinking) Input Capacitor (VIN to GND) Output Capacitor with ESR of 10 max., (VOUT to GND)
ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperature of 0OC to +70 OC for AMC7584; IO = 10mA, COUT = 10 F, 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.) AMC7584 Parameter Symbol Test Conditions Units Min. Typ. Max. AMC7584-2.5 VIN = 4V, TA = 25 OC 2.475 2.500 2.525 Output Voltage AMC7584-3.3 AMC7584-5.0 Reference Voltage AMC7584-ADJ VREF VOI VOL VO VIN = VOUT + 2V, TA = 25 OC 3.267 3.300 3.333 4.950 5.000 5.050 1.238 1.250 1.262 IO = 10 mA to 7A 4V VIN 7V VIN = 4V, 10mA IO 7A VIN = VOUT + 2V, 10mA IO 7A 4V VIN 7V IO = 100mA IO = 7A 0.05 0.2 % 1.230 1.250 1.270 0.005 0.2 V % V
Line Regulation (Note 2) AMC7584-2.5 Load regulation AMC7584-3.3 (Note 2) AMC7584-5.0 AMC7584-ADJ Dropout Voltage Quiescent Current Adj pin current (AMC7584-ADJ only) Current Limit Output Noise Voltage (Note 3) Long Term Stability (Note 3)
V IQ IADJ ICL
0.010 0.030 1.100 1.300 8 50 7 8 150 20 13 120
V mA A A VRMS mV/1000hr
4V VIN 7V, 100mA IO 7A 4V VIN 7V, 100mA IO 7A 4V VIN 7V
VO RMS 10HZ - 100kHZ, IO = 5mA
Ripple rejection (Note 3) RR fO = 120HZ, 1V RMS, I O = 100mA 66 dB Note 2: Line and load regulation is 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: These parameters, although guaranteed, are not tested in production prior to shipment
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AMC DOC. #: AMC7584_E (LF) Feb 2005
AMC7584
7A LOW DROPOUT REGULATOR
APPLICATION INFORMATION: Thermal Consideration
Maximum Power Calculation: TJ(MAX) - TA(MAX) JA TJ(OC): Maximum recommended junction temperature TA(OC): Ambient temperature of the application JA(OC/W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating materials. The maximum power dissipation of a single-output regulator : PD(MAX) = [(VIN(MAX) - VOUT(NOM))] x IOUT(NOM) + VIN(MAX) x IQ PD(MAX)= Where: 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 Then JA = (150 OC - TA) / PD Thermal consideration:
When power consumption is over about 1.2W( at 70oC ambient temperature), additional heat sink is required to control the junction temperature below 125 OC.
The junction temperature is: Tj = PD (JT + CS + SA ) + TA PD:Dissipated power. JT :Thermal resistance from the junction to the mounting tab of the package. CS: T hermal resistance through the interface between the IC and the surface on which it is mounted. (typically, CS < 1.0C / 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. 59 PCB SA (C / W ) PCB heat sink size (mm2) 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)
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AMC DOC. #: AMC7584_D (LF) March 2004
AMC7584
7A 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. #: AMC7584_D (LF) March 2004
AMC7584
7A 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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