ST LD1580 User Manual

查询LD1580供应商

7 A VERY LOW DROP POSITIVE VOLTAGE REGULATOR

■ OUTPUT CURRENT LIMIT

■ LOW DROPOUT VOLTAGE: TYPICALLY

400mV AT 7AOUTPUT CURRENT

■ OUTPUT VOLTAGE REMOTE SENSE PIN

■ FAST T RANSIENT RESPONSE

■ THERMAL SHUTDOWN PROTECTION

WITH H YSTERESIS

■ WIDE OPERAT ING TEMPERATURE RANGE

-40°C TO 125°C

■ NO SUPPLY SEQUENCING PROBLEMS IN

DUAL SUPPLY MODE

■ OUTPUT VOLTAGES AVAILABLE1.5V, 1.8V,

2.5 V, 3.0 V, 3.3 V ADJUSTABLE.

DESCRIPTION

The LD1580 is a very low dropout positive linear voltage regulator particularly suitable in applications requiring output currents up to 7 A. The LD1580 typical dropout voltage is 400mV at 7A while it decreases at lighter loads. This very low dropout is achieved thanks to a second input voltage pin, named V which is also responsable of the output power stage driving. The LD1580 is provided wi th an output voltage remote sense pi n which reduces dramatically any

CONTROL

LD1580

ADJUSTABLE AND FIXED

PRELIMINARY DATA

HEPTAWATT

SPAK-5L SPAK-7L

output voltage vari ati ons that could occur due to

,

load changes. On fixed voltage devices, the ADJ pin is still available. A small capacitor on this pin helps to improve transient response.

TM

PENTAWATT

5

1

P2PAK

TM

SCHEMATIC DIAGRAM

1/18November 2002

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

LD1580

The LD1580 also features a built-in out put current limit function and a thermal shutdown protection with hysteresis which prevents from excessive power dissipation in case of insufficient

heatsinking. On chip trimmi ng allows the regulator to reach a very tight output voltage t olerance, within ±2% at the maximum output current and over the full temperature range.

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

POWER

V

CONTROL

I

OUT

P

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.

DC V DC V

POWER CONTROL

voltage

voltage Output Current Power Dissipation

D

Storage Temperature Range

stg

Operating Junction Temperature Range

op

from -0.3 to 6 V

from -0.3 to 13 V Internally Limited A Internally Limited W

-55 to +150 °C

-40 to +125 °C

THERMAL DATA

Symbol Parameter

R

thj-case

R

thj-amb

Thermal Resistance Junction-case Thermal Resistance Junction-ambient

PENTAWATT HEPTAWATT

TM TM

P2PAK

3 3 2 °C/W

50 62.5 TBD °C/W

SPAK-5L SPAK-7L

Unit

CONNECTION DIAGRAM (top v iew)

HEPTAWATT

TM

P2PAK

PENTAWATT

TM

SPAK-5L SPAK-7L

2/18

ORDERING CODES

LD1580

P2PAK (*)

PENTAWATT SPAK-5L (*) SPAK-7L (*) HEPTAWATT OUTPUT VOLTAGE

LD1580K7-15 LD1580V7V15 1.5V LD1580K7-18 LD1580V7V18 1.8V LD1580K7-25 LD1580V7V25 2.5V LD1580K7-30 LD1580V7V30 3.0V LD1580K7-33 LD1580V7V33 3.3V

LD1580P2T LD1580V5V LD1580K5 Adjustable

(*) Available in Tape & Reel with the suffix "R" for fixed version and "-R" for adjustable version.

TYPICAL APPLICATION CIRCUITS FOR FIXED VERSION

TYPICAL APPLICATION CIRCUITS FOR ADJUSTABLE VERSION

VO=V

REF

R

2

(1 + )

R

1

3/18

LD1580

ELECTRICAL CHARACTERISTICS FOR LD1580xx15 (Tj= -40 °C to 125 °C, CP=330 µF, CC=10 µF,

C

=100 µF, unless otherwise specified)

OUT

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage V

O

∆V

I

Line Regulation V

O

Load Regulation V

O

V

I

OUT

CONTROL

C

Quiescent Current V

Q

Output Current Limit V

Pin Current V

SVR Supply Voltage Rejection V

V

T

SHDN

T

HYST

Minimun V

DC

(V

CONTROL

Minimun V

DP

(V

POWER

-VO)

Shutdown Temperature Threshold

Thermal Shutdown Hysteresis

CONTROL

-VO)

POWER

Voltage

CONTROL

=25 °C, I

T

j

V

CONTROL

V

POWER

I

OUT

CONTROL

V

POWER

I

OUT

CONTROL

I

OUT

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

CONTROL

I

OUT

CONTROL

=4 V, V

OUT

=3Vto12V

=2.1 V to 5.5 V

=0 to 7 A

=2.65Vto12V

=2 V to 5.5 V

=10 mA

=4 V, V

=0 to 7 A

=4 V, V

=100 mA

=4 V, V

=4 A

=4 V, V

=4 A

=4 V, V

=7 A

=4 V, V

=0 A

=4 V, V

=0 mA

1)

CONTROL=VPOWER

V I

V V V V V V V

=1 V

RIPPLE

=4 A, Tj=25 °C

OUT

=2.3 V, I

POWER

=2.3 V, I

POWER

=2.3 V, I

POWER

=2.3 V, I

POWER CONTROL CONTROL CONTROL

P-P

=4 V, I =4 V, I =4 V, I

=2.3 V

POWER

=2.3 V

POWER

=2.3 V

POWER

=2.3 V

POWER

=2 V

POWER

=2.3 V

POWER

=2.3 V

POWER

=2.3 V (Note

POWER

=4 V Avg,

=100 mA (Note 2) 0.95 1.15 V

OUT

=1 A 0.95 1.15

OUT

=4 A 1 1.2

OUT

=7 A 1.05 1.3

OUT

=1 A (Note 2) 0.05 0.15 V

OUT

=4 A 0.2 0.4

OUT

=7 A 0.4 0.6

OUT

1.485 1.5 1.515 V

1.470 1.5 1.530

0.08 0.24 %

0.08 0.4 %

610mA

30 60

33 70

60 120

510mA

89 A

60 80 dB

170

5

°C °C

4/18

LD1580

ELECTRICAL CHARACTERISTICS FOR LD1580xx18 (Tj= -40 °C to 125 °C, CP=330 µF, CC=10 µF,

=100 µF, unless otherwise specified)

C

OUT

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage V

O

∆V

I

Line Regulation V

O

Load Regulation V

O

V

I

C

CONTROL

Quiescent Current V

I

Q

Output Current Limit V

OUT

Pin Current V

SVR Supply Voltage Rejection V

V

T

SHDN

T

HYST

Minimun V

DC

(V

CONTROL-VO

Minimun V

DP

(V

POWER-VO

Shutdown Temperature Threshold

Thermal Shutdown Hysteresis

CONTROL

POWER

Voltage

)

Voltage

)

CONTROL

=25 °C, I

T

j

V

CONTROL

V

POWER

I

OUT

CONTROL

V

POWER

I

OUT

CONTROL

I

OUT

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

CONTROL

I

OUT

CONTROL

=4 V, V

OUT

=3.3Vto12V

=2.4 V to 5.5 V

=0 to 7 A

=2.95Vto12V

=2.3 V to 5.5 V

=10 mA

=4.3 V, V

=0 to 7 A

=4.3 V, V

=100 mA

=4.3 V, V

=4 A

=4.3 V, V

=4 A

=4.3 V, V

=7 A

=4.3 V, V

=0 A

=4.3 V, V

=0 mA

1)

CONTROL=VPOWER

V I

V V V V V V V

=1 V

RIPPLE

=4 A, Tj=25 °C

OUT

=2.6 V, I

POWER

=2.6 V, I

POWER

=2.6 V, I

POWER

=2.6 V, I

POWER CONTROL CONTROL CONTROL

P-P

=4.3 V, I =4.3 V, I =4.3 V, I

=2.6 V

POWER

=2.6 V

POWER

=2.6 V

POWER

=2.6 V

POWER

=2.3 V

POWER

=2.6 V

POWER

=2.6 V

POWER

=2.6 V (Note

POWER

=4.3 V Avg,

=100 mA (Note 2) 0.95 1.15 V

OUT

=1 A 0.95 1.15

OUT

=4 A 1 1.2

OUT

=7 A 1.05 1.3

OUT

=1 A (Note 2) 0.05 0.15 V

OUT

=4 A 0.2 0.4

OUT

=7 A 0.4 0.6

OUT

1.782 1.8 1.818 V

1.764 1.8 1.836

0.08 0.24 %

0.08 0.4 %

610mA

30 60

33 70

60 120

510mA

89 A

58.4 78.4 dB

170 °C

5°C

5/18

LD1580

ELECTRICAL CHARACTERISTICS FOR LD1580xx25 (Tj= -40 °C to 125 °C, CP=330 µF, CC=10 µF,

C

=100 µF, unless otherwise specified)

OUT

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Output Voltage V

O

∆V

I

Line Regulation V

O

Load Regulation V

O

V

I

C

CONTROL

Quiescent Current V

I

Q

Output Current Limit V

OUT

Pin Current V

SVR Supply Voltage Rejection V

V

T

SHDN

T

HYST

Minimun V

DC

(V

CONTROL-VO

Minimun V

DP

(V

POWER-VO

Shutdown Temperature Threshold

Thermal Shutdown Hysteresis

CONTROL

POWER

Voltage

)

Voltage

)

CONTROL

T

=25 °C, I

j

V

CONTROL

V

POWER

I

OUT

CONTROL

V

POWER

I

OUT

CONTROL

I

OUT

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

V

CONTROL

I

OUT

CONTROL

I

OUT

CONTROL

(Note1)

CONTROL=VPOWER

V

RIPPLE

I

OUT

V

POWER

V

POWER

V

POWER

V

POWER

V

CONTROL

V

CONTROL

V

CONTROL

=5 V, V

=0 mA

OUT

=4Vto12V

=3.1 V to 5.5 V

=0 to 7 A

=3.65Vto12V

=3 V to 5.5 V

=10 mA

=5 V, V

=0 to 7 A

=5 V, V

=100 mA

=5 V, V

=4 A

=5 V, V

=4 A

=5 V, V

=7 A

=5 V, V

=0 A

=5 V, V

=1 V

P-P

=4 A, Tj=25 °C

=3.3 V, I =3.3 V, I =3.3 V, I =3.3 V, I

=5 V, I =5 V, I =5 V, I

OUT OUT OUT OUT OUT OUT OUT

POWER

=3.3 V

2.475 2.5 2.525 V

2.450 2.5 2.550

0.08 0.24 %

POWER

=5 V Avg,

=3.3 V

=3 V

=3.3 V

55.5 75.5 dB

0.08 0.4 %

610mA

30 60

33 70

60 120

510mA

89 A

=100 mA (Note 2) 0.95 1.15 V =1 A 0.95 1.15 =4 A 1 1.2 =7 A 1.05 1.3 =1 A (Note 2) 0.05 0.15 V =4 A 0.2 0.4 =7 A 0.4 0.6

170 °C

5°C

6/18