ST LD39015XG08R, LD39015M08R, LD39015XG10R, LD39015M25R, LD39015M10R User Manual

LD39015xx

150 mA low quiescent current low noise voltage regulator

Features

■Input voltage from 1.5 to 5.5 V

■Ultra low dropout voltage (80 mV typ. at 100 mA load)

■Very low quiescent current (18 µA typ. at no load, 35 µA typ. at 150 mA load, 1 µA max in off mode)

■Very low noise without bypass capacitor (29 µVRMS at VOUT = 0.8 V)

■Output voltage tolerance: ± 2.0% @ 25 °C

■150 mA guaranteed output current

■Wide range of output voltages available on request: 0.8 V to 3.3 V with 100 mV step

■Logic-controlled electronic shutdown

■Compatible with ceramic capacitors CO = 1 µF

■Internal current and thermal limit

■Available in SOT666 and SOT23-5L packages

■Temperature range: -40 °C to 125 °C

Description

The LD39015xx series provides 150 mA maximum current from an input voltage ranging

SOT666

SOT23-5L

from 1.5 V to 5.5 V with a typical dropout voltage of 80 mV. It is stable with ceramic capacitor. 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. Enable logic control function puts the LD39015xx in shut-down 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 mobile phones, personal digital assistants (PDAs), cordless phones or similar battery-powered systems.

Table 1.	Device summary
Part numbers			Order codes			Output voltages
			SOT666		SOT23-5L
LD39015XX08			LD39015XG08R		LD39015M08R	0.8 V
LD39015XX10			LD39015XG10R (1)		LD39015M10R	1.0 V
LD39015XX12			LD39015XG12R		LD39015M12R	1.2 V
LD39015XX125					LD39015M125R	1.25 V
LD39015XX15			LD39015XG15R (1)		LD39015M15R	1.5 V
LD39015XX18			LD39015XG18R (1)		LD39015M18R	1.8 V
LD39015XX25			LD39015XG25R (1)		LD39015M25R	2.5 V
LD39015XX33			LD39015XG33R		LD39015M33R	3.3 V

1. Available on request. Other voltages available on request from 0.8 V to 3.3 V in 100 mV step.

February 2009	Rev 3	1/16
		www.st.com

Contents	LD39015xx

Contents

1	Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 3
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 4
3	Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
4	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
5	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
6	Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
8	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15

2/16

LD39015xx	Diagram

1 Diagram

Figure 1. Block diagram

IN	OUT
	BandGap
	1.22 V
	R1
	Trimming
	Thermal
	R2
	Protection
	Enable
EN
	GND

3/16

Pin configuration	LD39015xx

2 Pin configuration

Figure 2. Pin connection (top view)

		SOT666			SOT23-5L
Table 2.	Pin description
	Pin n°			Symbol	Function
SOT666		SOT23-5L
1		3		EN	Enable pin logic input: Low=shutdown, High=active
2		2		GND	Common ground.
3		1		IN	Input voltage of the LDO
4		5		OUT	Output voltage
5		4		NC	Not connected
6				NC	Not connected

4/16

LD39015xx	Typical application

3 Typical application

Figure 3. Typical application circuit

VIN	IN	OUT		VOUT
1 µF			1 µF	Load

VEN

EN

GND

5/16