ST LD1580P2T-R User Manual

7 A very low drop positive voltage regulator adjustable

Features

■ Output current limit

■ Low dropout voltage: typically 400 mV at 7 A

output current

■ Output voltage remote sense pin

■ Fast transient response

■ Thermal shutdown protection with hysteresis

■ Wide operating temperature range -40 °C to

125 °C

■ No supply sequencing problems in dual supply

mode

■ Output voltages available: adjustable

Description

The LD1580 is a very low dropout positive linear
voltage regulator particularly suitable in
applications requiring output currents up to 7 A.

LD1580XX

P²PAK

power dissipation in case of insufficient
heatsinking. On chip trimming allows the regulator
to reach a very tight output voltage tolerance,
within ± 2 % at the maximum output current and
over the full temperature range.

The LD1580 typical dropout voltage is 400 mV at
7 A while it decreases at lighter loads.

This very low dropout is achieved thanks to a
second input voltage pin, named VCONTROL,
which is also responsible of the output power
stage driving.

The LD1580 is provided with an output voltage
remote sense pin which reduces dramatically any
output voltage variations that could occur due to
load changes.

The ADJ pin is still available. A small capacitor on
this pin helps to improve transient response.

The LD1580 also features a built-in output current
limit function and a thermal shutdown protection
with hysteresis which prevents from excessive

Table 1. Device summary

Part number Order code Packaging

LD1580XX LD1580P2T-R tape and reel

April 2008 Rev 5 1/15

www.st.com

15

Contents LD1580XX

Contents

1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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LD1580XX Diagram

1 Diagram

Figure 1. Schematic diagram

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Pin configuration LD1580XX

2 Pin configuration

Figure 2. Pin connections (top view)

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LD1580XX Maximum ratings

3 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

V

POWER

V

CONTROL

I

OUT

P

T

STG

T

OP

D

DC V

DC V

voltage from -0.3 to 6 V

POWER

CONTROL

voltage from -0.3 to 13 V

Output current Internally limited

Power dissipation Internally limited

Storage temperature range -55 to +150 °C

Operating junction temperature range -40 to +125 °C

Note: Absolute maximum ratings are those values beyond which damage to the device may occur.

Functional operation under these condition is not implied.

Table 3. Thermal data

Symbol Parameter P²PAK Un it

R

R

thJC

thJA

Thermal resistance junction-case 3 °C/W

Thermal resistance junction-ambient 62.5 °C/W

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