ST LD29080DT15R, LD29080PT15R, LD29080PTR, LD29080DT18R, LD29080PT18R User Manual

800 mA fixed and adjustable output very low drop

Features

■ Very low dropout voltage (typ. 0.4 at 800 mA)

■ Guaranteed output current up to 800 mA

■ Fixed and adjustable output voltage (± 1% at

25 °C)

■ Internal current and thermal limit

■ Logic controlled electronic shutdown

Description

LD29080xx

voltage regulator

Datasheet − production data

PPAK DPAK

The LD29080xx is a high current, high accuracy,

SOT223

low-dropout voltage regulators series. These
regulators feature 400 mV dropout voltages and
very low ground current. Designed for high
current loads, these devices also find applications
in lower current, extremely low dropout-critical
systems, where their tiny dropout voltage and
ground current values are important attributes.
Typical application 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 (tape and reel) PPAK (tape and reel) SOT223

LD29080XX15 LD29080DT15R LD29080PT15R 1.5 V

LD29080XX18 LD29080DT18R LD29080PT18R 1.8 V

Output voltages

LD29080XX25 LD29080DT25R LD29080PT25R 2.5 V

LD29080XX33 LD29080DT33R LD29080PT33R LD29080S33R 3.3 V

LD29080XX50 LD29080DT50R LD29080PT50R 5.0 V

LD29080XX90 LD29080DT90R LD29080PT90R 9.0 V

LD29080XX LD29080PTR ADJ

May 2012 Doc ID 10918 Rev 7 1/24

This is information on a product in full production.

www.st.com

24

Contents LD29080xx

Contents

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

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

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

4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2/24 Doc ID 10918 Rev 7

LD29080xx Diagram

1 Diagram

Figure 1. Schematic diagram for adjustable version

Figure 2. Schematic diagram for fixed version

* Only for version with inhibit function.

Doc ID 10918 Rev 7 3/24

Pin configuration LD29080xx

2 Pin configuration

Figure 3. Pin connections (top view)

GND

PPAK

CS17230

5

4

3

GND

2

1

CS17240

DPAK

3

GND

2

1

123

AM09358v1

SOT223

Table 2. Pin description

Symbol PPAK DPAK SOT223

V

I

GND 3 2 2

V

O

ADJ/N.C.

INHIBIT

1. Not connect for fixed version.

2. Not internally pulled up; in order to assure the operating condition (device in ON mode), it must be connected to a positive
voltage higher than 2 V.

(1)

(2)

211

433

5

1

Figure 4. Application circuit

* Only for version with inhibit function.

4/24 Doc ID 10918 Rev 7

VO = V

(1 + R1/R2)

REF

LD29080xx Maximum ratings

3 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

V

I

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

Inhibit input voltage 14 V

Output current Internally limited mA

Power dissipation Internally limited mW

Storage temperature range - 55 to 150 °C

Operating 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.

Table 4. Thermal data

(1)

V

Symbol Parameter DPAK PPAK SOT223 Unit

R

R

thJC

thJA

Thermal resistance junction-case 8 8 25 °C/W

Thermal resistance junction-ambient 100 100 110 °C/W

Doc ID 10918 Rev 7 5/24

Electrical characteristics LD29080xx

4 Electrical characteristics

IO = 10 mA, (

Note 4

) TJ = 25 °C, VI = 3.5 V, V

= 2V, CI = 330 nF, CO = 10 µF, unless

INH

otherwise specified.

Table 5. Electrical characteristics of LD29080#15

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

I

V

O

ΔV

O

ΔV

O

SVR Supply voltage rejection

I

q

I

sc

V

IL

V

IH

I

INH

eN Output noise voltage BP = 10Hz to 100kHz, IO = 100mA 60 µV

Operating input voltage IO = 10mA to 800mA 2.5 13 V

Output voltage

= 10mA to 800mA, VI = 3 to 7V

I

O

= -40 to 125°C

T

J

1.485 1.5 1.515

1.463 1.537

Load regulation IO = 10mA to 800mA 0.2 1.0 %

Line regulation VI = 3 to 13V 0.06 0.5 %

f = 120 Hz, V
(

Note 1

= 3.8 ± 1V, IO = 400mA

I

)

65 75 dB

IO = 10mA, TJ = -40 to 125°C 2 5

Quiescent current

= 400mA, TJ = -40 to 125°C 8 20

O

mAI

IO = 800mA, TJ = -40 to 125°C 14 35

V

= 13V, V

I

= GND, TJ = -40 to 125°C 130 180 µA

INH

Short circuit current RL = 0 1.2 A

Control input logic low OFF MODE, TJ = -40 to 125°C 0.8 V

Control input logic high ON MODE, TJ = -40 to 125°C 2 V

Control input current V

= 13V, TJ = -40 to 125°C 5 10 µA

INH

V

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

+ 1 V applied to VI.

O

3 Reference voltage is measured between output and GND pins, with ADJ PIN tied to V

4 In order to avoid any output voltage rise within the whole operating temperature range, due

to output leakage current, a minimum load current of 2 mA is required.

6/24 Doc ID 10918 Rev 7

.

O

LD29080xx Electrical characteristics

IO = 10 mA, (

Note 4

) TJ = 25 °C, VI = 3.5 V, V

= 2 V, CI = 330 nF, CO = 10 µF, unless

INH

otherwise specified.

Table 6. Electrical characteristics of LD29080#18

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

I

V

O

ΔV

O

ΔV

O

SVR Supply voltage rejection

V

DROP

I

q

I

sc

V

IL

V

IH

I

INH

eN Output noise voltage B

Operating input voltage IO = 10mA to 800mA 2.5 13 V

Output voltage

IO = 10mA to 800mA, VI = 3 to 7.3V
T

= -40 to 125°C

J

1.782 1.8 1.818

1.755 1.845

Load regulation IO = 10mA to 800mA 0.2 1.0 %

Line regulation VI = 3 to 13V 0.06 0.5 %

Dropout voltage

f = 120 Hz, VI = 3.8 ± 1V, IO = 400mA

Note 1

)

(

IO = 150mA, TJ = -40 to 125°C (

Note 2

Note 2

I

= 800mA, TJ = -40 to 125°C (

O

I

= 10mA, TJ = -40 to 125°C 2 5

O

Note 2

62 72 dB

)0.1

)0.2

)0.40.7

mAIO = 400mA, TJ = -40 to 125°C 8 20

Quiescent current

I

= 800mA, TJ = -40 to 125°C 14 35

O

V

= 13V, V

I

= GND, TJ = -40 to 125°C 130 180 µA

INH

Short circuit current RL = 0 1.2 A

Control input logic low OFF MODE, TJ = -40 to 125°C 0.8 V

Control input logic high ON MODE, TJ = -40 to 125°C 2 V

Control input current V

= 13V, TJ = -40 to 125°C 5 10 µA

INH

= 10Hz to 100kHz, IO = 100mA 72 µV

P

V

VIO = 400mA, TJ = -40 to 125°C (

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 Reference voltage is measured between output and GND pins, with ADJ PIN tied to V

4 In order to avoid any output voltage rise within the whole operating temperature range, due

to output leakage current, a minimum load current of 2 mA is required.

+ 1 V applied to VI.

O

.

O

Doc ID 10918 Rev 7 7/24

Electrical characteristics LD29080xx

IO = 10 mA, (

Note 4

) TJ = 25 °C, VI = 4.5 V, V

= 2 V, CI = 330 nF, CO = 10 µF, unless

INH

otherwise specified.

Table 7. Electrical characteristics of LD29080#25

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

I

V

O

ΔV

O

ΔV

O

SVR Supply voltage rejection

V

DROP

I

q

I

sc

V

IL

V

IH

I

INH

eN Output noise voltage B

Operating input voltage IO = 10mA to 800mA 13 V

Output voltage

IO = 10mA to 800mA, VI = 3.5 to 8V
T

= -40 to 125°C

J

2.475 2.5 2.525

2.438 2.562

Load regulation IO = 10mA to 800mA 0.2 1.0 %

Line regulation VI = 3.5 to 13V 0.06 0.5 %

Dropout voltage

f = 120 Hz, VI = 4.5 ± 1V, IO = 400mA

Note 1

)

(

IO = 150mA, TJ = -40 to 125°C (

Note 2

Note 2

I

= 800mA, TJ = -40 to 125°C (

O

I

= 10mA, TJ = -40 to 125°C 2 5

O

Note 2

55 70 dB

)0.1

)0.2

)0.40.7

mAIO = 400mA, TJ = -40 to 125°C 8 20

Quiescent current

I

= 800mA, TJ = -40 to 125°C 14 35

O

V

= 13V, V

I

= GND, TJ = -40 to 125°C 130 180 µA

INH

Short circuit current RL = 0 1.2 A

Control input logic low OFF MODE, TJ = -40 to 125°C 0.8 V

Control input logic high ON MODE, TJ = -40 to 125°C 2 V

Control input current V

= 13V, TJ = -40 to 125°C 5 10 µA

INH

= 10Hz to 100kHz, IO = 100mA 100 µV

P

V

VIO = 400mA, TJ = -40 to 125°C (

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

+ 1 V applied to VI.

O

3 Reference voltage is measured between output and GND pins, with ADJ PIN tied to V

4 In order to avoid any output voltage rise within the whole operating temperature range, due

to output leakage current, a minimum load current of 2 mA is required.

8/24 Doc ID 10918 Rev 7

.

O