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POWER MANAGEMENT Description
The EZ1584 is a high performance positive voltage regulator designed for use in applications requiring low dropout performance at 7A. Additionally, the EZ1584 series provides excellent regulation over variations in line, load and temperature. Outstanding features include low dropout performance at rated current, fast transient response, internal current limiting and thermal shutdown protection of the output device. The EZ1584 is an excellent choice for powering microprocessor systems. Using an LDO eliminates MOSFETs and inductors, saving both space and cost. An LDO also provides better transient response and no ripple. A variety of options are available for maximum flexibility: the EZ1584C is intended for commercial applications and has both fixed and adjustable voltage options; the EZ1584I is intended for industrial applications and has a 3.3V fixed and an adjustable option. All devices are available in the popular TO-220 package.
7.0 Amp Low Dropout Positive Voltage Regulators
Features
K Low dropout performance: 1.3V max. for EZ1584C K Full current rating over line and temperature K Fast transient response K 2% total output regulation over line, load and K K K K K K K K K K K K K K
and 1.4V max. for EZ1584I
EZ1584C & EZ1584I
temperature Adjust pin current max 90A over temperature Fixed/adjustable output voltage Line regulation typically 0.015% Load regulation typically 0.05% Industrial temperature range (EZ1584I) TO-220 package
Applications
Memory supply Graphics core supply Other 2.5V to 3.6V microprocessor supplies Low voltage logic supplies Battery-powered circuitry Post regulator for switching supply Telecom supplies Industrial supplies
Typical Application Circuit
Fixed Voltage Regulator
U1 VIN > 4.75V 3 IN
EZ1584-3.3 2 TAB OUT
VOUT = 3.3V
+
C1 10uF Tant.
+ GND 1
C2 10uF Tant. Min.
Adjustable Voltage Regulator
U1 VIN > 4.75V 3 IN TAB EZ1584 OUT 2 VOUT = 3.45V
+
C1 10uF Tant.
ADJ 1
R1 133 Ohm, 1%
+
C2 10uF Tant. Min
Notes: (1) C1 needed if device is far from filter capacitors (2) C2 minimum value required for stability
Revision 2, December 2000 1
R2 232 Ohm, 1%
R2 VOUT = VREF * 1 + + I ADJ * R 2 R1
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EZ1584C & EZ1584I
POWER MANAGEMENT Absolute Maximum Ratings
Parameter Input Supply Voltage Power Dissipation Thermal Resistance Junction to Case Thermal Resistance Junction to Ambient Operating Ambient Temperature Range EZ1584C EZ1584I Operating Junction Temperature Range EZ1584C EZ1584I Storage Temperature Range Lead Temperature (Soldering) 10 Sec. ESD Rating (Human Body Model) Symbol VIN PD J C J A TA Maximum 7 Internally Limited 2 50 0 to 70 -40 to 85 0 to 125 -40 to 125 -65 to 150 300 2 Units V W C/W C/W C
TJ TSTG TLEAD ESD
C C C kV
Electrical Characteristics
Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 7.0A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 7.0A. Values in bold apply over full operating ambient temperature range.
Parameter Output Voltage
(1)
Symbol VO
VIN 5V
IO 0mA
Min 0.99lVOl 0.98lVOl
Typ VO
Max 1.01lVOl 1.02lVOl
Units V
EZ1584C-X.X, EZ1584I-3.3 Reference Voltage
(1)
VREF
5V
10mA
1.238 1.225
1.250
1.262 1.275
V
EZ1584C, EZ1584I Line Regulation (1) Load Regulation (1) Dropout Voltage(1)(2) EZ1584C, EZ1584C-X.X EZ1584I, EZ1584I-3.3 Current Limit ICL REG(LINE) REG(LOAD) VD 5V 7A 10mA
0.015 0.05 1.20 1.20 7.1 9.0
0.2 0.4 1.30 1.40
% % V
A
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EZ1584C & EZ1584I
POWER MANAGEMENT Electrical Characteristics (Cont.)
Unless otherwise specified: Adj. VIN = 2.75V to 7.0V and Adj. IO = 10mA to 7.0A; Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 7.0A. Values in bold apply over full operating ambient temperature range.
Parameter Quiescent Current Fixed Voltage Versions Temperature Coefficient Adjust Pin Current Adjust Pin Current Change Temperature Stability Minimum Load Current Adj Voltage Versions RMS Output Noise(3) Ripple Rejection Ratio(4)
Symbol IQ TC IADJ IADJ TS IO VN RA
VIN 5V
IO
Min
Typ 10 0.005 55 0.2
Max 13
Units mA %/C
90 5
A A %
5V 5V
0.5A
0.5 5 0.003 10
mA %VO dB
5V
7A
60
72
NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) VOUT, VREF = 1% (3) Bandwidth of 10 Hz to 10 kHz. (4) 120 Hz input ripple (CADJ for ADJ = 25F).
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EZ1584C & EZ1584I
POWER MANAGEMENT Pin Configuration Ordering Information
Device(1)(2) EZ1584CT-X.X EZ1584IT-X.X P ackag e TO-220(3)
Notes: (1) Where X.X denotes voltage options. Available voltages are: 1.5V, 2.5V, 3.3V and 3.45V for EZ1584C and 3.3V only for EZ1584I. Leave blank for adjustable version (1.3V to 5.7V). Contact factory for additional voltage options. (2) Where C and I denote Commercial (0C to 70C) and Industrial (-40C to 85C) ambient temperature ranges. (3) Only available in tube packaging. A tube contains 50 devices.
Pin Descriptions
Pin 1 Pin Name ADJUST Pin Function This pin is the negative side of the reference voltage for adjustable devices. Transient response can be improved by adding a small bypass capacitor from the adjust pin to ground. This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts, and should be connected to ground. This is the power output of the device and is electrically connected to the TAB. This is the input supply pin for both the control circuitry and the pass device.
GROUND 2 3 OUTPUT INPUT
Block Diagram
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EZ1584C & EZ1584I
POWER MANAGEMENT Outline Drawing - TO-220
Contact Information
Semtech Corporation Power Management Products Division 652 Mitchell Rd., Newbury Park, CA 91320 Phone: (805)498-2111 FAX (805)498-3804
2000 Semtech Corp.
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