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Dual Input Low Dropout Regulator
POWER MANAGEMENT Description
The EZ158X family of high performance positive voltage regulators are designed for use in applications requiring very low dropout voltage at up to 7, 5, 3 and 1.5 amps. Capable of supplying up to 2.8V on boards where both 5V and 3.3V supplies are available, the superior dropout characteristics of the EZ158X result in reduced heat dissipation compared to regular LDOs. This allows for heatsink size reduction or elimination. Additionally, the EZ158X provides excellent regulation over variations in line, load and temperature. Remote sense operation allows compensating for trace, connector and other resistive losses. Outstanding features include very low dropout performance at rated current, fast transient response, remote sense, internal current limiting, thermal shutdown and safe operating area protection of the output device. The EZ158X is a five terminal adjustable or fixed 2.5V voltage regulator available in the popular 5 pin TO-220 and TO-263 plastic packages.
EZ1580/EZ1581 EZ1582/EZ1583
Features
540mV dropout @ 7A in dual supply mode (EZ1580) Remote sense operation Fast transient response 0.5% initial accuracy Line regulation typically 0.08% Load regulation typically 0.08% 5 Pin TO-220 and TO-263 packages
Applications
Microprocessor supplies Split plane microprocessor supplies Advanced graphics cards Sound cards Low voltage logic supplies Switching power supply post regulation
Typical Application Circuits
Adjustable Output Parts(3)
3.3V POWER IN 5V CONTROL IN 5 4 U1 1 SNS EZ158XCX VREF 3
PWR OUT CTL ADJ
2.5V OUT
R1 124 C3 68uF
C1 33uF
C2 10uF
2
R2 VOUT = VREF 1 + + I ADJ * R 2 R1
R2 124
GROUND
GROUND
Fixed Output Parts
U1 1 SNS 3.3V POWER IN 5V CONTROL IN 5 4 PWR CTL GND C1 33uF GROUND C2 10uF 2 C3 68uF GROUND 3 2.5V OUT EZ158XCX-2.5
OUT
Notes: (1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors should be used. Increasing the value of the output capacitor will improve the overall transient response. (2) If the same voltage is input to both PWR and CTL, then the dropout voltage will become 1.3V maximum. (3) A small (~0.033F) capacitor can be used to bypass the ADJ pin to improve transient response, if needed.
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EZ1580/EZ1581 EZ1582/EZ1583
POWER MANAGEMENT Absolute Maximum Ratings
Parameter Power Input Voltage Control Input Voltage Power Dissipation Thermal Resistance Junction to Ambient EZ158X TO-220 EZ158X TO-263 Thermal Resistance Junction to Case EZ1580/1 (TO-220 & TO-263) EZ1582/3 (TO-220 & TO-263) Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec. ESD Rating (Human Body Model) Symbol VPWR VCTL PD J A Maximum 7 13.2 Internally Limited 50 60 2 3 0 to +125 -65 to +150 300 2 Units V V W C/W
J C TJ TSTG TLEAD ESD
C/W C C C kV
Electrical Characteristics(7)
Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10F. Values in bold apply over full operating temperature range.
Parameter Reference Voltage(1) (Adj. Voltage Versions) Output Voltage(1) (2.5V Version) Line Regulation(1) Load Regulation(1) VPWR Dropout Voltage EZ1581, EZ1582, EZ1583 VPWR Dropout Voltage EZ1580
(1)(2) (1)(2)
Symbol VREF
Test Conditions VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA VPWR = 2.05V, VCTL = 4.5V, 10mA < IOUT < IRATED
Min 1.237 1.231 -1 -1.5
Typ 1.250
Max 1.263 1.269
Units V
VOUT
VPWR = 3.3V, VCTL = 4.5V, IOUT = 10mA VPWR = 3.3V, VCTL = 4.5V, 10mA < IOUT < IRATED
VOUT
+1 +1.5
%
REG(LINE) REG(LOAD)
VPWR = (VOUT + 0.8V) to 5.5V, VCTL = 4.5V to 12V, IOUT = 10mA VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = 10mA to IRATED
1.0 1.0
3.0 5.0
mV mV
VPWR - VOUT
VCTL = 4.75V, I O = IRATED
0.40 0.50
0.50 0.60
V
VCTL = 4.75V, I O = IRATED
0.54 0.70
0.62 0.80
V
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EZ1580/EZ1581 EZ1582/EZ1583
POWER MANAGEMENT Electrical Characteristics (Cont.)(7)
Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10F. Values in bold apply over full operating temperature range.
Parameter Control Pin Current (3) EZ1583 EZ1582 EZ1581 EZ1580 Adjust Pin Current Minimum Load Current(4) Current Limit EZ1583 EZ1582 EZ1581 EZ1580 Ripple Rejection Ratio(5) Thermal Regulation (6)
Symbol
Test Conditions
Min
Typ
Max
Units
ICTL
VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = IRATED
6 30 33 60
120 120 120 120 120 10
mA
IADJ IOUT(MIN)
VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA VPWR = VOUT + 0.8V, VCTL = 5V
50 5
A mA
ICL
VPWR = VOUT + 0.8V, VCTL = 4.5V, VOUT = 100mV
1.6 3.1 5.1 7.1
A
RA REG (THERMAL)
VPWR = VCTL = 5V, I O = IRATED
60
80 0.002 0.02
dB %/W
NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) Minimum input to output voltage differential required to maintain 1% regulation. (3) Current used to drive the output section. (4) Required to maintain regulation. Resistor divider R1, R2 is usually utilized for minimum load current. (5) VRIPPLE = 1VPK-PK, 120Hz. (6) 30ms. (7) IRATED = 1.5A for EZ1583, 3A for EZ1582, 5A for EZ1581 and 7A for EZ1580.
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EZ1580/EZ1581 EZ1582/EZ1583
POWER MANAGEMENT Pin Configurations
Pin 1 2 3 4 5 Function SNS AD J OUT CTL PWR
Ordering Information
Device(1) EZ1580CT-X.X EZ1581CT-X.X EZ1582CT-X.X EZ1583CT-X.X EZ1580CM-X.X.TR EZ1581CM-X.X.TR EZ1582CM-X.X.TR EZ1583CM-X.X.TR TO-263, 5-pin (3) TO-220, 5-pin(2) P ackag e IOUT (A) 7 5 3 2.5 7 5 3 2.5
Tab is OUT
Block Diagram
EZ1583CMTRT(4) EZ158xCM-X.XTRT(4) -
Notes: (1) Where -X.X denotes voltage options. Available voltage is: 2.5V. Leave blank for adjustable version (1.3 to 5.7V). (2) Only available in tube packaging. A tube contains 50 devices. (3) Only available in tape and reel packaging. A reel contains 800 devices. (4) This product is fully WEEE and RoHS compliant. Where x = 0; 1; 2 or 3. X.X denotes voltage options.
Pin Descriptions
Pin # 1 2 3 4 Symbol SNS AD J OUT CTL Pin Name SENSE ADJUST OUTPUT CONTROL Pin Function This pin is the positive side of the reference voltage for this device. With this pin it is possible to Kelvin sense the output voltage at the load. This pin is the negative side of the reference voltage for this device. Transient response can be improved by adding a small bypass capacitor from the adjust pin to ground. This is the power output of the device. This pin is electrically connected to the tab. This pin is the supply pin for the control circuitry for the device. The current flow into this pin will be approximately 1% of the output current. For the device to regulate, the voltage on this pin must be between 1.0V and 1.3V greater than the output voltage. This is the collector input to the power device of the EZ1583. The ouput load current is supplied through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and 0.8V greater than the output voltage, depending upon load current.
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PWR
POWER
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EZ1580/EZ1581 EZ1582/EZ1583
POWER MANAGEMENT Applications Information
The EZ158X is a low dropout regulator designed to power low voltage microcontrollers, graphics ICs, sound cards etc. The dropout voltage is minimized by utilizing a separate input voltage, VCTL, which should exceed VOUT by at least 1.3V. The 2.5V (for example) power for the load can be derived from a 3.3V system supply. Since the efficiency of a linear regulator is the ratio of the output to the input voltage, heat dissipation is reduced by using a 3.3V input (versus a 5V one), thereby lowering heatsink and cooling fan costs. For lower current applications, the heatsink might be eliminated altogether. For a load of 7A at 2.5V, the regulator would dissipate 17.5W when converting from 5V, but only 5.6W from a 3.3V input. Remote Kelvin sensing of the output voltage can be achieved by connecting the sense pin to the output at the load. Remote sensing will reduce errors associated with resistive trace losses between regulator and processor.
Outline Drawing - TO-220-5
aaa OP BA B A E2 E/2 Q H1 D2 D D1 E A A1 SEATING PLANE
DIM
A A1 A2 b c D D1 D2 E E1 E2 e H1 L N OP Q aaa bbb ccc
DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX
.140 .020 .080 .025 .014 .560 .330 .480 .380 .270 .190 3.56 4.82 .055 0.51 1.40 .115 2.03 2.92 .031 .041 0.63 0.80 1.04 .024 0.36 0.61 .650 14.22 16.51 .355 8.38 9.02 .507 12.19 12.88 .420 9.65 10.66 .350 6.86 8.90 .030 0.76 .067 BSC 1.70 BSC .230 .270 5.84 6.86 .580 12.70 14.73 .500 5 5 .139 .156 3.53 3.96 .100 .120 2.54 3.05 .014 0.36 .015 0.38 .010 0.25
C L
c e bbb 5X b BA A2 E1 ccc BA
NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES. 2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
Outline Drawing - TO-263-5
A E E/2 0 L1
DIM
A A1 b c c1 D D1 E E1 H e L L1 N 0 01 aaa
DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX
.160 .000 .020 .015 .045 .326 .270 .380 .245 .575 .190 .010 .039 .029 .065 .380 .420 .625 .067 BSC .070 .110 .066 5 15 0 8 .010 4.83 4.06 0.25 0.00 0.51 0.99 0.74 0.38 1.14 1.65 8.28 9.65 6.86 9.65 10.67 6.22 14.61 15.88 1.70 BSC 2.79 1.78 1.68 5 15 0 8 0.25
D H 12345
e bXN aaa BA
A SEATING PLANE B A1 c1 SIDE VIEW PLATED COPPER HEAT SPREADER D1 (L1) E1 L
NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES).
SEE DETAIL
A
c
DETAIL
A
01
2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
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EZ1580/EZ1581 EZ1582/EZ1583
POWER MANAGEMENT Minimum Land Pattern - TO-263-5
H
DIM
DIMENSIONS INCHES MILLIMETERS
.125 .420 .360 .067 .042 .140 .625 3.18 10.67 9.14 1.70 1.07 3.56 15.88
K
Z
G H K P X Y Z
G
Y
P
NOTES:
X
1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET.
Contact Information
Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804
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