EZ1581CM-1.5.TR [ETC]
Analog IC ; 模拟IC\n
| 型号： | EZ1581CM-1.5.TR |
| 厂家： | 
ETC |
| 描述： | Analog IC
|
| 文件： | 总6页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EZ1580/EZ1581
EZ1582/EZ1583
Dual Input Low Dropout Regulator
POWER MANAGEMENT
Description
Features
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.
u 540mV dropout @ 7A in dual supply mode
(EZ1580)
u Remote sense operation
u Fast transient response
u 0.5% initial accuracy
u Line regulation typically 0.08%
u Load regulation typically 0.08%
u 5 Pin TO-220 and TO-263 packages
Applications
u Microprocessor supplies
u Split plane microprocessor supplies
u Advanced graphics cards
u Sound cards
u Low voltage logic supplies
u Switching power supply post regulation
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 voltage regula-
tor available in the popular 5 pin TO-220 and TO-263
plastic packages.
Typical Application Circuits
Adjustable Output Parts(3)
U1
EZ158XCX
OUT
1
VREF
SNS
5
4
3.3V POWER IN
5V CONTROL IN
PWR
CTL
3
2.5V OUT
R2
ADJ
R1
124
VOUT = VREF 1+
+ IADJ • R2
C1
33uF
C2
10uF
C3
68uF
R1
2
R2
124
GROUND
GROUND
Fixed Output Parts
U1
EZ158XCX-2.5
U1
EZ158XCX-1.5
1
1
SNS
SNS
5
5
4
3.3V POWER IN
5V CONTROL IN
2.5V POWER IN
PWR
PWR
CTL
3
3
2.5V OUT
1.5V OUT
OUT
OUT
4
3.3V CONTROL IN
CTL
GND
2
GND
2
C1
33uF
C2
10uF
C3
68uF
C1
47uF
C2
10uF
C3
100uF
GROUND
GROUND
GROUND
GROUND
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 (~0.033µF) capacitor can be used to bypass the ADJ pin to improve transient response, if needed.
Revision 1, January 2001
1
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EZ1580/EZ1581
EZ1582/EZ1583
POWER MANAGEMENT
Absolute Maximum Ratings
Parameter
Symbol
Maximum
Units
Power Input Voltage
Control Input Voltage
Power Dissipation
VPWR
VCTL
PD
7
V
V
13.2
Internally Limited
W
Thermal Resistance Junction to Ambient
EZ158X TO-220
EZ158X TO-263
50
60
°C/W
°C/W
qJA
Thermal Resistance Junction to Case
EZ1580/1 (TO-220 & TO-263)
EZ1582/3 (TO-220 & TO-263)
2
3
qJC
Operating Junction Temperature Range
Storage Temperature Range
TJ
0 to +125
-65 to +150
300
°C
°C
°C
kV
TSTG
TLEAD
ESD
Lead Temperature (Soldering) 10 Sec.
ESD Rating (Human Body Model)
2
Electrical Characteristics(7)
Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10µF. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
Reference Voltage(1)
(Adj. Voltage Versions)
VREF
VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA
1.237 1.250 1.263
V
VPWR = 2.05V,
1.231
1.269
VCTL = 4.5V, 10mA < IOUT < IRATED
Output Voltage(1)
VOUT
VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = 10mA
-1
VOUT
+1
%
(Fixed Voltage Versions)
VPWR = VOUT + 0.8V,
-1.5
+1.5
VCTL = 4.5V, 10mA < IOUT < IRATED
Line Regulation(1)
Load Regulation(1)
REG(LINE)
REG(LOAD)
VPWR = (VOUT + 0.8V) to 5.5V,
VCTL = 4.5V to 12V, IOUT = 10mA
1.0
1.0
3.0
5.0
mV
mV
VPWR = VOUT + 0.8V,
VCTL = 4.5V, IOUT = 10mA to IRATED
(1)(2)
VPWR Dropout Voltage
EZ1581, EZ1582,
VPWR - VOUT
VCTL = 4.75V, I O = IRATED
0.40
0.50
V
V
EZ1583
0.50
0.60
(1)(2)
V
PWR Dropout Voltage
EZ1580
VCTL = 4.75V, I O = IRATED
0.54
0.62
0.70
0.80
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EZ1580/EZ1581
EZ1582/EZ1583
POWER MANAGEMENT
Electrical Characteristics (Cont.)(7)
Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10µF. Values in bold apply over full operating temperature range.
Parameter
Symbol
Test Conditions
Min
Typ
Max Units
Control Pin Current (3)
EZ1583
ICTL
VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = IRATED
6
120
120
120
120
120
10
mA
EZ1582
30
33
60
50
5
EZ1581
EZ1580
Adjust Pin Current
Minimum Load Current(4)
Current Limit
EZ1583
IADJ
VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA
VPWR = VOUT + 0.8V, VCTL = 5V
µA
IOUT(MIN)
mA
ICL
VPWR = VOUT + 0.8V, VCTL = 4.5V,
1.6
3.1
5.1
7.1
60
A
EZ1582
DVOUT = 100mV
EZ1581
EZ1580
Ripple Rejection Ratio(5)
Thermal Regulation (6)
RA
VPWR = VCTL = 5V, I O = IRATED
80
dB
REG (THERMAL)
0.002 0.02
%/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.
ã 2001 Semtech Corp.
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EZ1580/EZ1581
EZ1582/EZ1583
POWER MANAGEMENT
Pin Configurations
Ordering Information
Device(1)
Package
I
(A)
OUT
Pin
Function
EZ1580CT-X.X
EZ1581CT-X.X
TO-220, 5-pin(2)
7
1
2
3
4
5
SNS
ADJ
OUT
CTL
5
3
EZ1582CT-X.X
EZ1583CT-X.X
1.5
7
EZ1580CM-X.X.TR
EZ1581CM-X.X.TR
EZ1582CM-X.X.TR
EZ1583CM-X.X.TR
TO-263, 5-pin (3)
PWR
5
Tab is OUT
3
1.5
Notes:
Block Diagram
(1) Where -X.X denotes voltage options. Available
voltages are: 1.5V and 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.
Pin Descriptions
Pin # Symbol
Pin Name
Pin Function
1
SNS
SENSE
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.
2
ADJ
ADJUST
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.
3
4
OUT
CTL
OUTPUT
This is the power output of the device. This pin is electrically connected to the tab.
CONTROL 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.
5
PWR
POWER
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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EZ1580/EZ1581
EZ1582/EZ1583
POWER MANAGEMENT
Applications Information
The EZ158X is a low dropout regulator designed to power fan costs. For lower current applications, the heatsink
low voltage microcontrollers, graphics ICs, sound cards might be eliminated altogether. For a load of 7A at 2.5V,
etc.
the regulator would dissipate 17.5W when converting from
5V, but only 5.6W from a 3.3V input.
The dropout voltage is minimized by utilizing a separate
input voltage, VCTL, which should exceed VOUT by at least Remote Kelvin sensing of the output voltage can be
1.3V. The 2.5V (for example) power for the load can be achieved by connecting the sense pin to the output at
derived from a 3.3V system supply. Since the efficiency the load. Remote sensing will reduce errors associated
of a linear regulator is the ratio of the output to the input with resistive trace losses between regulator and
voltage, heat dissipation is reduced by using a 3.3V input processor.
(versus a 5V one), thereby lowering heatsink and cooling
Outline Drawing - TO-220-5
Outline Drawing - TO-263-5
ã 2001 Semtech Corp.
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EZ1580/EZ1581
EZ1582/EZ1583
POWER MANAGEMENT
Minimum Land Pattern - TO-263-5
Contact Information
Semtech Corporation
Power Management Products Division
652 Mitchell Rd., Newbury Park, CA 91320
Phone: (805)498-2111 FAX (805)498-3804
ã 2001 Semtech Corp.
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