ST LD29150DT18R, LD29150DT25R, LD29150PTR, LD29150P2T33R, LD29150DT33R User Manual

1.5 A, very low drop voltage regulators

Features

■ Very low dropout voltage (typ. 0.4 at 1.5 A)

■ Guaranteed output current up to 1.5 A

■ Fixed and adjustable output voltage (± 1% at

25 °C)

■ Internal current and thermal limit

■ Logic controlled electronic shutdown available

in PPAK and P²PAK

Description

DPAK

LD29150xx

Datasheet − production data

PPAK

The LD29150xx is a high current, high accuracy,
low-dropout voltage regulator series. These

P²PAK

regulators feature 400 mV dropout voltage and
very low ground current. Designed for high
current loads, these devices are also used in
lower current, extremely low dropout-critical
systems, where their tiny dropout voltage and
ground current values are important attributes.
Typical applications are in power supply switching
post regulation, series power supply for monitors,
series power supply for VCRs and TVs, computer
systems and battery powered systems.

Table 1. Device summary

Order codes

Part numbers

DPAK PPAK P²PAK

LD29150XX18 LD29150DT18R 1.8 V

Output voltages

LD29150XX25 LD29150DT25R 2.5 V

LD29150XX33 LD29150DT33R LD29150P2T33R 3.3 V

LD29150XX50 LD29150DT50R LD29150PT50R 5.0 V

LD29150XX LD29150PTR ADJ

May 2012 Doc ID 9614 Rev 17 1/22

This is information on a product in full production.

www.st.com

22

Contents LD29150xx

Contents

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

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

3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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

6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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LD29150xx Diagram

1 Diagram

Figure 1. Schematic diagram for adjustable version

Figure 2. Schematic diagram for fixed version

* Only for version with inhibit function.

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Pin configuration LD29150xx

2 Pin configuration

Figure 3. Pin connections (top view)

PPAK

* Not connected for fixed version.

P²PAK

DPAK

4/22 Doc ID 9614 Rev 17

LD29150xx Typical application

3 Typical application

Figure 4. Application circuit

* Only for version with inhibit function.

VO = V

(1 + R1/R2)

REF

Doc ID 9614 Rev 17 5/22

Maximum ratings LD29150xx

4 Maximum ratings

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

V

I

V

O

V

INH

I

O

P

D

T

STG

T

OP

1. Above 14 V the device is automatically in shut-down.

DC input voltage 30

DC output voltage -0.3 to 20 V

Inhibit input voltage -0.3 to 20 V

Output current Internally limited mA

Power dissipation Internally limited mW

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 conditions is not implied.

(1)

V

Table 3. Thermal data

S ym bo l Pa ra me te r D PAK P PAK P² PAK U ni t

R

thJA

R

thJC

Thermal resistance junction-ambient 100 100 60 °C/W

Thermal resistance junction-case 8 8 3 °C/W

6/22 Doc ID 9614 Rev 17

LD29150xx Electrical characteristics

5 Electrical characteristics

IO = 10 mA, TJ = 25 °C, VI = 3.8 V, V

INH

= 2 V (

Note 3

), CI = 330 nF, CO = 10 µF, unless

otherwise specified.

Table 4. Electrical characteristics of LD29150#18

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

O

ΔV

O

ΔVOLine regulation VI = 3 to 13 V 0.06 0.5 %

SVR Supply voltage rejection

V

DROP

I

q

I

sc

V

IL

V

IH

I

INH

eN Output noise voltage B

T

SHDN

Output voltage

= 10 mA to 1.5 A, VI = 3 to 7.3 V

I

O

= - 40 to 125°C

T

J

1.782 1.8 1.818

1.764 1.836

Load regulation IO = 10 mA to 1.5 A 0.2 1.0 %

= 3.8 ± 1 V, IO = 0.75 A

I

)

Note 2

Note 2

Note 2

)0.40.7

= GND, TJ = - 40 to 125°C 130 180 µA

INH

62 72 dB

)0.1

)0.2

mA

Dropout voltage

Quiescent current

f = 120 Hz, V

Note 1

(

= 250 mA, TJ = - 40 to 125°C (

I

O

= 0.75 A, TJ = - 40 to 125°C (

O

I

= 1.5 A, TJ = - 40 to 125°C (

O

= 0.75 A, TJ = - 40 to 125°C 15 40

I

O

= 1.5 A, TJ = - 40 to 125°C 30 80

I

O

V

= 13 V, V

I

Short circuit current VI - VO = 5.5 V 2.2 A

Control input logic low OFF MODE, (

Control input logic high ON MODE, (

Control input current TJ = - 40 to 125°C, V

= 10 Hz to 100 kHz, IO = 100 mA 72 µV

P

Note 3

), TJ = - 40 to 125°C 0.8 V

Note 3

), TJ = - 40 to 125°C 2 V

= 13 V 5 10 µA

INH

Thermal shutdown 150 °C

V

VI

RMS

Note: 1 Guaranteed by design.

2 Dropout voltage is defined as the input-to-output differential when the output voltage drops

to 99% of its nominal value with V

3 Only for version with Inhibit function.

+ 1 V applied to VI.

O

Doc ID 9614 Rev 17 7/22