ST LD29300P2T15R, LD29300D2T18R, LD29300D2M18R, LD29300P2T18R, LD29300P2M18R User Manual

LD29300xx

3 A, very low drop voltage regulators

Features

■Very low dropout voltage (Typ. 0.4 at 3 A)

■Guaranteed output current up to 3 A

■Fixed voltage with ± 1 % tolerance at 25 °C

■Internal current and thermal limit

■Logic controlled electronic shutdown available in PPAK

Description

The LD29300xx is a high current, high accuracy, 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.

TO-220		D2PAK
P2PAK/A	P2PAK	D2PAK/A

Table 1.	Device summary
	Part numbers	Output voltages
	LD29300XX15	1.5 V
	LD29300XX18	1.8 V
	LD29300XX25	2.5 V
	LD29300XX33	3.3 V
	LD29300XX50	5.0 V
	LD29300XX80	8.0 V
	LD29300XX	ADJ
July 2008	Rev 12	1/26
		www.st.com

Contents	LD29300xx

Contents

1	Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 3
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 4
3	Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
4	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
5	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
6	Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	17
8	Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	24
9	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25

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LD29300xx	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	LD29300xx

2 Pin configuration

Figure 3. Pin connections (top view)

TO-220		D2PAK
P2PAK	P2PAK/A	D2PAK/A

* Not connected for fixed version.

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LD29300xx	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				LD29300xx
4	Maximum ratings
Table 2.	Absolute maximum ratings
Symbol		Parameter	Value		Unit
VI		DC input voltage	30 (1)		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	TO-220	D2PAK-P2PAK-D2PAK/A-P2PAK/A	Unit
RthJA	Thermal resistance junction-ambient	50	60	°C/W
RthJC	Thermal resistance junction-case	3	3	°C/W

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LD29300xx	Electrical characteristics

5	Electrical characteristics
Table 4.	Electrical characteristics of LD29300#15
	(IO = 10 mA, TJ = 25 °C, VI = 3.5 V, VINH = 2 V (1), CI = 330 nF, CO = 10 µF, unless otherwise
	specified)
Symbol	Parameter	Test conditions				Min.	Typ.	Max.	Unit
VI	Minimum operating input	IO = 10mA to 3A, TJ = -40 to 125°C				2.5			V
	voltage
VO	Output voltage	IO = 10mA to 3A, VI = 3 to 7V				1.485	1.5	1.515	V
		TJ = -40 to 125°C				1.47		1.53
VO	Load regulation	IO = 10mA to 3A					0.2	1.0	%
VO	Line regulation	VI = 3 to 13V					0.06	0.5	%
SVR	Supply voltage rejection	f = 120 Hz, V = 3.5 ± 1V,	I	O	= 1.5A (2)	65	75		dB
		I
		IO = 1.5A, TJ = -40 to 125°C					20	50	mA
Iq	Quiescent current	IO = 3A, TJ = -40 to 125°C					45	100
		VI = 13V, VINH = GND, TJ = -40 to 125°C					130	180	µA
Isc	Short circuit current	VI - VO = 5.5V					4.5		A
VIL	Control input logic low	OFF MODE (1), TJ = -40 to 125°C						0.8	V
VIH	Control input logic high	ON MODE (1), TJ = -40 to 125°C				2			V
IINH	Control input current	TJ = -40 to 125°C, VINH = 13V					5	10	µA
eN	Output noise voltage	BP = 10Hz to 100kHz, IO = 100mA					60		µVRMS

1.Only for version with Inhibit function.

2.Guaranteed by design

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Electrical characteristics								LD29300xx
Table 5.		Electrical characteristics of LD29300#18
		(IO = 10 mA, TJ = 25 °C, VI = 3.8 V, VINH = 2 V (1), CI = 330 nF, CO = 10 µF, unless otherwise
		specified)
Symbol		Parameter		Test conditions		Min.	Typ.	Max.	Unit
	VO	Output voltage	IO = 10mA to 3A, VI = 3 to 7.3V			1.782	1.8	1.818	V
			TJ = -40 to 125°C			1.764		1.836
	VO	Load regulation	IO = 10mA to 3A				0.2	1.0	%
	VO	Line regulation	VI = 3 to 13V				0.06	0.5	%
SVR		Supply voltage rejection	f = 120 Hz, V = 3.8 ±1V, I		= 1.5A (2)	62	72		dB
				I	O
			I	= 500mA, T = -40 to 125°C (3)			0.1
			O	J
V	DROP	Dropout voltage	I	= 1.5A, T = -40 to 125°C (3)			0.2		V
			O	J
			I	= 3A, T = -40 to 125°C (3)			0.4	0.7
			O	J
			IO = 1.5A, TJ = -40 to 125°C				20	50	mA
	Iq	Quiescent current	IO = 3A, TJ = -40 to 125°C				45	100
			VI = 13V, VINH = GND, TJ = -40 to 125°C				130	180	µA
	Isc	Short circuit current	VI - VO = 5.5V				4.5		A
	VIL	Control input logic low	OFF MODE (1), TJ = -40 to 125°C					0.8	V
	VIH	Control input logic high	ON MODE (1), TJ = -40 to 125°C			2			V
IINH		Control input current	TJ = -40 to 125°C, VINH = 13V				5	10	µA
	eN	Output noise voltage	BP = 10Hz to 100kHz, IO = 100mA				60		µVRMS

1.Only for version with Inhibit function.

2.Guaranteed by design.

3.Dropout 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.

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