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LT1580IT#06PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LT1580/LT1580-2.5
■
Low Dropout, 540mV at 7A Output Current
■
Fast Transient Response
■
Remote Sense
■
1mV Load Regulation
■
Fixed 2.5V Output and Adjustable Output
■
No Supply Sequencing Problems in
Dual Supply Mode
The LT®1580 is a 7A low dropout regulator designed to
power the new generation of microprocessors. The drop-
out voltage of this device is 100mV at light loads rising to
just 540mV at 7A. To achieve this dropout, a second low
current input voltage 1V greater than the output voltage, is
required. The device can also be used as a single supply
device where dropout is comparable to an LT1584.
Several other new features have been added to the LT1580.
A remote SENSE pin is brought out. This feature virtually
eliminates output voltage variations due to load changes.
Typical load regulation, measured at the SENSE pin, for a
load current step of 100mA to 7A is less than 1mV.
The LT1580 has fast transient response, equal to the
LT1584. On fixed voltage devices, the ADJ pin is brought
out. A small capacitor on the ADJ pin further improves
transient response.
This device is ideal for generating processor supplies of
2V to 3V on motherboards where both 5V and 3.3V
supplies are available.
7A, Very Low
Dropout Regulator
FEATURES
DESCRIPTION
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM Corporation.
APPLICATIONS
U
■
Microprocessor Supplies
■
Post Regulators for Switching Supplies
■
High Current Regulators
■
5V to 3.XXV for Pentium
®
Processors Operating
at 90MHz to 166MHz and Beyond
■
3.3V to 2.9V for Portable Pentium Processor
■
PowerPC
TM
Series Power Supplies
OUTPUT CURRENT (A)
0
MINIMUM POWER VOLTAGE (V)
1.0
0
1
5
7
1580 G03
4
2
3
6
0.5
DATA SHEET LIMIT
T
J
= 25°C
T
J
= 125°C
INDICATES GUARANTEED TEST POINTS
0°C ≤ T
J
≤ 125°C
Dropout Voltage—
Minimum Power Voltage
TYPICAL APPLICATION
U
2.5V Microprocessor Supply
V
OUT
SENSE
ADJGND
0.1µF
1580 TA01
10µF
TANT
330µF
OS-CON
2.5V/7A
LT1580-2.5
100µF TANT
AVX TPS
× 7
V
POWER
3.3V
7A
5V
0.2A
V
CONTROL
+
+
+
2
LT1580/LT1580-2.5
ABSOLUTE MAXIMUM RATINGS
W
WW
U
V
POWER
Input Voltage ................................................ 6V
V
CONTROL
Input Voltage ........................................... 13V
Storage Temperature ............................ –65°C to 150°C
Operating Junction Temperature Range
Control Section
LT1580C ........................................... 0°C to 125°C
LT1580I........................................ –40°C to 125°C
Power Transistor
LT1580C ........................................... 0°C to 150°C
LT1580I........................................ –40°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PRECONDITIONING
UUU
100% Thermal Limit Functional Test
ELECTRICAL CHARACTERISTICS
(Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Voltage: LT1580-2.5 V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 0mA 2.485 2.500 2.515 V
V
CONTROL
= 4V to 12V, V
POWER
= 3V to 5.5V, I
LOAD
= 0mA to 4A ● 2.475 2.500 2.525 V
V
CONTROL
= 4V to 12V, V
POWER
= 3V to 5.5V, 2.475 2.500 2.525 V
I
LOAD
= 0mA to 7A, 0°C ≤ T
J
≤ 125°C
V
CONTROL
= 4V to 12V, V
POWER
= 3V to 5.5V, 2.460 2.500 2.525 V
I
LOAD
= 0mA to 6.5A, –40°C ≤ T
J
< 0°C
Reference Voltage: LT1580 V
CONTROL
= 2.75V, V
POWER
= 2V, I
LOAD
= 10mA 1.243 1.250 1.257 V
(V
ADJ
= 0V) V
CONTROL
= 2.7V to 12V, V
POWER
= 1.75V to 5.5V, I
LOAD
= 10mA to 4A ● 1.237 1.250 1.263 V
V
CONTROL
= 2.7V to 12V, V
POWER
= 2.05V to 5.5V, 1.237 1.250 1.263 V
I
LOAD
= 10mA to 7A, 0°C ≤ T
J
≤ 125°C
V
CONTROL
= 2.7V to 12V, V
POWER
= 2.05V to 5.5V, 1.232 1.250 1.263 V
I
LOAD
= 10mA to 6.5A, –40°C ≤ T
J
< 0°C
Line Regulation: LT1580-2.5 V
CONTROL
= 3.65V to 12V, V
POWER
= 3V to 5.5V, I
LOAD
= 10mA ● 13 mV
LT1580 V
CONTROL
= 2.5V to 12V, V
POWER
= 1.75V to 5.5V, I
LOAD
= 10mA ● 13 mV
PACKAGE/ORDER INFORMATION
W
U
U
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1580CT
LT1580IT
LT1580CQ
LT1580IQ
ORDER PART
NUMBER
ORDER PART
NUMBER
LT1580CT7-2.5
LT1580IT7-2.5
LT1580CR-2.5
LT1580IR-2.5
Consult factory for Military grade parts.
θ
JA
= 30°C/W
R PACKAGE
7-LEAD PLASTIC DD
FRONT VIEW
NC
V
POWER
ADJ
V
OUT
V
CONTROL
GND
SENSE
7
6
5
4
3
2
1
TAB
IS
OUTPUT
θ
JA
= 30°C/ W
Q PACKAGE
5-LEAD PLASTIC DD
TAB
IS
OUTPUT
FRONT VIEW
V
POWER
V
CONTROL
V
OUT
ADJ
SENSE
5
4
3
2
1
θ
JA
= 50°C/ W
T PACKAGE
5-LEAD PLASTIC TO-220
V
POWER
V
CONTROL
V
OUT
ADJ
SENSE
FRONT VIEW
5
4
3
2
1
TAB
IS
OUTPUT
T7 PACKAGE
7-LEAD PLASTIC TO-220
NC
V
POWER
ADJ
V
OUT
V
CONTROL
GND
SENSE
FRONT VIEW
7
6
5
4
3
2
1
TAB
IS
OUTPUT
θ
JA
= 50°C/W
3
LT1580/LT1580-2.5
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Load Regulation: LT1580-2.5 V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 0mA to 7A ● 15mV
LT1580 (V
ADJ
= 0V) V
CONTROL
= 2.75V, V
POWER
= 2.1V, I
LOAD
= 10mA to 7A ● 15mV
Minimum Load Current: LT1580 V
CONTROL
= 5V, V
POWER
= 3.3V, V
ADJ
= 0V (Note 3) ● 510mA
Control Pin Current: LT1580-2.5 V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 100mA, 0°C ≤ T
J
≤ 125°C610mA
(Note 4) V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 100mA, –40°C ≤ T
J
< 0°C12mA
V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C3060mA
V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C70mA
V
CONTROL
= 5V, V
POWER
= 3V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C3370mA
V
CONTROL
= 5V, V
POWER
= 3V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C80mA
V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 7A, 0°C ≤ T
J
≤ 125°C 60 120 mA
V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 6.5A, –40°C ≤ T
J
< 0°C 130 mA
Control Pin Current: LT1580 V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 100mA, 0°C ≤ T
J
≤ 125°C610mA
(Note 4) V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 100mA, –40°C ≤ T
J
< 0°C12mA
V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C3060mA
V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C70mA
V
CONTROL
= 2.75V, V
POWER
= 1.75V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C3370mA
V
CONTROL
= 2.75V, V
POWER
= 1.75V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C80mA
V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 7A, 0°C ≤ T
J
≤ 125°C 60 120 mA
V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 6.5A, –40°C ≤ T
J
< 0°C 130 mA
Ground Pin Current: LT1580-2.5 V
CONTROL
= 5V, V
POWER
= 3.3V, I
LOAD
= 0mA ● 610mA
ADJ Pin Current: LT1580 (V
ADJ
= 0V) V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 10mA ● 50 120 µA
Current Limit: LT1580-2.5 V
CONTROL
= 5V, V
POWER
= 3.3V, ∆V
OUT
= 100mV, 0°C ≤ T
J
≤ 125°C 7.1 8 A
V
CONTROL
= 5V, V
POWER
= 3.3V, ∆V
OUT
= 100mV, –40°C ≤ T
J
< 0°C 6.6 A
LT1580 (V
ADJ
= 0V) V
CONTROL
= 2.75V, V
POWER
= 2.05V, ∆V
OUT
= 100mV, 0°C ≤ T
J
≤ 125°C 7.1 8 A
V
CONTROL
= 2.75V, V
POWER
= 2.05V, ∆V
OUT
= 100mV, –40°C ≤ T
J
< 0°C 6.6 A
Ripple Rejection: LT1580-2.5 V
C
= V
P
= 5V Avg, V
RIPPLE
= 1V
P-P
, I
OUT
= 4A, T
J
= 25°C6080dB
LT1580 V
C
= V
P
= 3.75V Avg, V
RIPPLE
= 1V
P-P
, V
ADJ
= 0V, I
OUT
= 4A, T
J
= 25°C6080 dB
Thermal Regulation 30ms Pulse 0.002 0.020 %/W
Thermal Resistance, Junction-to-Case T, T7 Packages, Control Circuitry/Power Transistor 0.65/2.70 °C/W
Dropout Voltage (Note 2)
Minimum V
CONTROL
: LT1580-2.5 V
POWER
= 3.3V, I
LOAD
= 100mA, 0°C ≤ T
J
≤ 125°C 1.00 1.15 V
(V
CONTROL
– V
OUT
)V
POWER
= 3.3V, I
LOAD
= 100mA, –40°C ≤ T
J
< 0°C 1.20 V
V
POWER
= 3.3V, I
LOAD
= 1A, 0°C ≤ T
J
≤ 125°C 1.00 1.15 V
V
POWER
= 3.3V, I
LOAD
= 1A, –40°C ≤ T
J
< 0°C 1.20 V
V
POWER
= 3.3V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C 1.06 1.20 V
V
POWER
= 3.3V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C 1.25 V
V
POWER
= 3.3V, I
LOAD
= 7A, 0°C ≤ T
J
≤ 125°C 1.15 1.30 V
V
POWER
= 3.3V, I
LOAD
= 6.5A, –40°C ≤ T
J
< 0°C 1.35 V
Minimum V
CONTROL
: LT1580 V
POWER
= 2.05V, I
LOAD
= 100mA, 0°C ≤ T
J
≤ 125°C 1.00 1.15 V
(V
CONTROL
– V
OUT
)V
POWER
= 2.05V, I
LOAD
= 100mA, –40°C ≤ T
J
< 0°C 1.20 V
(V
ADJ
= 0V) V
POWER
= 2.05V, I
LOAD
= 1A, 0°C ≤ T
J
≤ 125°C 1.00 1.15 V
V
POWER
= 2.05V, I
LOAD
= 1A, –40°C ≤ T
J
< 0°C 1.20 V
V
POWER
= 2.05V, I
LOAD
= 2.75A, 0°C ≤ T
J
≤ 125°C 1.05 1.18 V
V
POWER
= 2.05V, I
LOAD
= 2.75A, –40°C ≤ T
J
< 0°C 1.23 V
V
POWER
= 2.05V, I
LOAD
= 4A, 0°C ≤ T
J
≤ 125°C 1.06 1.20 V
V
POWER
= 2.05V, I
LOAD
= 4A, –40°C ≤ T
J
< 0°C 1.25 V
V
POWER
= 2.05V, I
LOAD
= 7A, 0°C ≤ T
J
≤ 125°C 1.15 1.30 V
V
POWER
= 2.05V, I
LOAD
= 6.5A, –40°C ≤ T
J
< 0°C 1.35 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT1580IT#06PBF

Mfr. #:
Buy LT1580IT#06PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LDO Voltage Regulators 7A Low Dropout HS Voltage Reg
Lifecycle:
New from this manufacturer.
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