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

LD29150xx

1.5 A, very low drop voltage regulators

Datasheet − production data

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)

	DPAK	PPAK
■	Internal current and thermal limit
■	Logic controlled electronic shutdown available
	in PPAK and P²PAK

Description

The LD29150xx is a high current, high accuracy,

P²PAK

low-dropout voltage regulator series. These 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
	Part numbers			Order codes		Output voltages
			DPAK	PPAK	P²PAK
	LD29150XX18		LD29150DT18R			1.8 V
	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.

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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

P²PAK

DPAK

* Not connected for fixed version.

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LD29150xx	Typical application

3 Typical application

Figure 4. Application circuit

VO = VREF (1 + R1/R2)

* Only for version with inhibit function.

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Maximum ratings				LD29150xx
4	Maximum ratings
Table 2.	Absolute maximum ratings
Symbol		Parameter	Value		Unit
VI		DC input voltage	30 (1)		V
VO		DC output voltage	-0.3 to 20		V
VINH		Inhibit input voltage	-0.3 to 20		V
IO		Output current	Internally limited		mA
PD		Power dissipation	Internally limited		mW
TSTG		Storage temperature range	-55 to 150		°C
TOP		Operating junction temperature range	-40 to 125		°C

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

Note:	Absolute maximum ratings are those values beyond which damage to the device may occur.
	Functional operation under these conditions is not implied.
Table 3.	Thermal data
Symbol	Parameter	DPAK		PPAK	P²PAK	Unit
RthJA	Thermal resistance junction-ambient	100		100	60	°C/W
RthJC	Thermal resistance junction-case	8		8	3	°C/W

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LD29150xx	Electrical characteristics

5 Electrical characteristics

IO = 10 mA, TJ = 25 °C, VI = 3.8 V, VINH = 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
VO	Output voltage	IO = 10 mA to 1.5 A, VI = 3 to 7.3 V	1.782	1.8	1.818	V
		TJ = - 40 to 125°C	1.764		1.836
VO	Load regulation	IO = 10 mA to 1.5 A		0.2	1.0	%
VO	Line regulation	VI = 3 to 13 V		0.06	0.5	%
SVR	Supply voltage rejection	f = 120 Hz, VI = 3.8 ± 1 V, IO = 0.75 A	62	72		dB
		(Note 1)
		IO = 250 mA, TJ = - 40 to 125°C (Note 2)		0.1
VDROP	Dropout voltage	IO = 0.75 A, TJ = - 40 to 125°C (Note 2)		0.2		V
		IO = 1.5 A, TJ = - 40 to 125°C (Note 2)		0.4	0.7
		IO = 0.75 A, TJ = - 40 to 125°C		15	40	mA
Iq	Quiescent current	IO = 1.5 A, TJ = - 40 to 125°C		30	80
		VI = 13 V, VINH = GND, TJ = - 40 to 125°C		130	180	µA
Isc	Short circuit current	VI - VO = 5.5 V		2.2		A
VIL	Control input logic low	OFF MODE, (Note 3), TJ = - 40 to 125°C			0.8	V
VIH	Control input logic high	ON MODE, (Note 3), TJ = - 40 to 125°C	2			V
IINH	Control input current	TJ = - 40 to 125°C, VINH = 13 V		5	10	µA
eN	Output noise voltage	BP = 10 Hz to 100 kHz, IO = 100 mA		72		µVRMS
TSHDN	Thermal shutdown			150		°C

Note: 1 Guaranteed by design.

2Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value with VO + 1 V applied to VI.

3Only for version with Inhibit function.

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