LD39100PU10R STMICROELECTRONICS [STMicroelectronics], LD39100PU10R Datasheet

LD39100PU10R

Manufacturer Part Number

LD39100PU10R

Description

1 A, low quiescent current, low noise voltage regulator

Manufacturer

STMICROELECTRONICS [STMicroelectronics]

Datasheet

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Features

■

Description

The LD39100xx provides 1 A maximum current

from an input voltage ranging from 1.5 V to 5.5 V

with a typical dropout voltage of 200 mV. The

deveice is stable due to the use of ceramic

capacitors on the input and output. The ultra low

drop-voltage, low quiescent current and low noise

features make it suitable for low power battery

powered applications. Power supply rejection is

65 dB at low frequencies and starts to roll off at 10

kHz.

Table 1.

April 2010

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

Input voltage from 1.5 to 5.5 V

Ultra low dropout voltage (200 mV typ. at 1 A

load)

Very low quiescent current (20 µA typ. at no

load, 200 µA typ. at 1 A load, 1 µA max in off

mode)

Very low noise with no bypass capacitor

(30 µV

Output voltage tolerance: ± 2.0 % @ 25 °C

1 A guaranteed output current

Wide range of output voltages available on

request: 0.8 V to 4.5 V with 100 mV step and

adjustable from 0.8 V

Logic-controlled electronic shutdown

Stabilized with ceramic capacitors C

Internal current and thermal limit

DFN6 (3 x 3 mm) package

Temperature range: - 40 °C to 125 °C

RMS

LD39100XX12

LD39100XX25

Part numbers

Device summary

LD39100XX

at V

OUT

1 A, low quiescent current, low noise voltage regulator

= 0.8 V)

OUT

Doc ID 15676 Rev 2

= 1 µF

LD39100XX12, LD39100XX25

LD39100PU12R

LD39100PU25R

LD39100PUR

Order codes

An enable logic control function puts the

LD39100xx in shutdown mode, allowing a total

current consumption lower than 1 µA. The device

also includes short-circuit constant current limiting

and thermal protection. Typical applications are

printers, personal digital assistants (PDAs),

cordless phones and consumer applications.

DFN6 (3 x 3 mm)

LD39100XX

Output voltages

Adj. from 0.8 V

1.2 V

2.5 V

Preliminary data

www.st.com

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LD39100PU10R Summary of contents

Page 1

A, low quiescent current, low noise voltage regulator Features ■ Input voltage from 1.5 to 5.5 V ■ Ultra low dropout voltage (200 mV typ load) ■ Very low quiescent current (20 µA typ ...

Page 2

Contents Contents 1 Circuit schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

LD39100XX, LD39100XX12, LD39100XX25 1 Circuit schematics Figure 1. Schematic diagram for the LD39100PU IN IN BandGap BandGap reference reference EN EN Figure 2. Schematic diagram for the LD39100PUxx IN IN BandGap BandGap reference reference EN EN Power-good Power-good Current Current ...

Page 4

Pin configuration 2 Pin configuration Figure 3. Pin connection (top view) EN GND PG LD39100PUxx Table 2. Pin description Pin n° Symbol LD39100PU EN 1 GND OUT ADJ GND ...

Page 5

LD39100XX, LD39100XX12, LD39100XX25 3 Maximum ratings Table 3. Absolute maximum ratings Symbol V DC input voltage output voltage OUT EN Enable pin PG Power Good pin ADJ Adjust pin I Output current OUT P Power dissipation D ...

Page 6

Electrical characteristics 4 Electrical characteristics ° 1 specified. Table 6. Electrical characteristics for the LD39100PU Symbol Parameter V Operating input voltage accuracy ADJ ADJ I Adjust pin current ...

Page 7

LD39100XX, LD39100XX12, LD39100XX25 Table 6. Electrical characteristics for the LD39100PU (continued) Symbol Parameter Enable input logic low V EN Enable input logic high I Enable pin input current EN (4) t Turn-on time ON Thermal shutdown T SHDN Hysteresis C ...

Page 8

Electrical characteristics ° otherwise specified. Table 7. Electrical characteristics for LD39100PUxx Symbol Parameter V Operating input voltage accuracy OUT OUT ΔV Static line regulation OUT ΔV Transient line regulation ...

Page 9

LD39100XX, LD39100XX12, LD39100XX25 Table 7. Electrical characteristics for LD39100PUxx (continued) Symbol Parameter I Enable pin input current EN (4) T Turn-on time ON Thermal shutdown T SHDN Hysteresis C Output capacitor OUT 1. All transient values are guaranteed by design, ...

Page 10

Typical performance characteristics 5 Typical performance characteristics µF. IN OUT Figure 4. V accuracy ADJ 0. ...

Page 11

LD39100XX, LD39100XX12, LD39100XX25 Figure 10. Output voltage vs. input voltage 1.2 1 from from 0.8 ...

Page 12

Typical performance characteristics Figure 16. Line regulation 0.04 0. from 3 5 from 3 5 100 mA 100 mA OUT OUT 0.03 ...

Page 13

LD39100XX, LD39100XX12, LD39100XX25 Figure 22. Enable voltage vs. temperature 5 5 100 mA 100 mA OUT OUT 0.9 0.9 0.8 0.8 0.7 0.7 0.6 ...

Page 14

Typical performance characteristics Figure 28. Startup transient OUT OUT from 0 =0 OUT Figure 30. ESR required for stability with ceramic capacitors 0.25 UNSTABLE ...

Page 15

LD39100XX, LD39100XX12, LD39100XX25 6 Application information The LD39100xx is an ultra low dropout linear regulator. It provides with a low 200 mV dropout. The input voltage range is from 1 5.5 V. The device ...

Page 16

Application information For the adjustable version, the output voltage can be adjusted from 0 the input voltage, minus the voltage drop across the PMOS (dropout voltage), by connecting a resistor divider between the ADJ pin and the ...

Page 17

LD39100XX, LD39100XX12, LD39100XX25 6.2 Enable function The LD39100xx features an enable function. When the EN voltage is higher than 2 V, the device is ON, and lower than 0.8 V, the device is OFF. In shutdown mode, ...

Page 18

Package mechanical data 7 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...

Page 19

LD39100XX, LD39100XX12, LD39100XX25 Dim. Min 0.23 D 2.90 D2 2.23 E 2. 0.30 DFN6 (3x3 mm) mechanical data mm. Typ. Max. 0.90 1.00 0.02 0.05 0.20 0.30 0.38 3.00 3.10 ...

Page 20

Package mechanical data Tape & reel QFNxx/DFNxx (3x3) mechanical data Dim. Min 12 20/24 LD39100XX, LD39100XX12, LD39100XX25 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 18.4 3.3 ...

Page 21

LD39100XX, LD39100XX12, LD39100XX25 Figure 35. DFN6 ( footprint recommended data Doc ID 15676 Rev 2 Package mechanical data 21/24 ...

Page 22

... Different output voltage versions of the LD39100xx available on request 8 Different output voltage versions of the LD39100xx available on request Table 8. Options available on request Order codes LD39100PU10R LD39100PU15R LD39100PU18R LD39100PU33R 22/24 Doc ID 15676 Rev 2 LD39100XX, Output voltages 1.0 V 1.5 V 1.8 V 3.3 V ...

Page 23

LD39100XX, LD39100XX12, LD39100XX25 9 Revision history Table 9. Document revision history Date Revision 29-Jul-2009 1 16-Apr-2010 2 Initial release. Modified Figure 8 on page 10. Doc ID 15676 Rev 2 Revision history Changes 23/24 ...

Page 24

Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any ...

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