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

LD29080xx

800 mA fixed and adjustable output very low drop voltage regulator

Datasheet − production data

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)

PPAK

DPAK

■Internal current and thermal limit

■Logic controlled electronic shutdown

Description
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
Part numbers				Order codes		Output voltages
			DPAK (tape and reel)	PPAK (tape and reel)	SOT223
LD29080XX15			LD29080DT15R	LD29080PT15R		1.5 V
LD29080XX18			LD29080DT18R	LD29080PT18R		1.8 V
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

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

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LD29080xx	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	LD29080xx

2 Pin configuration

Figure 3. Pin connections (top view)

5

	4		3		GND
GND	3	GND	2
	2		1
	1			1	2	3
	CS17230		CS17240
						AM09358v1
PPAK		DPAK			SOT223

Table 2.	Pin description
	Symbol		PPAK	DPAK	SOT223
	VI		2	1	1
	GND		3	2	2
	VO		4	3	3
	ADJ/N.C. (1)		5
	INHIBIT (2)		1

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.

Figure 4. Application circuit

VO = VREF (1 + R1/R2)

* Only for version with inhibit function.

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LD29080xx	Maximum ratings

3	Maximum ratings
Table 3.	Absolute maximum ratings
Symbol		Parameter	Value	Unit
VI		DC input voltage	30 (1)	V
VINH		Inhibit input voltage	14	V
IO		Output current	Internally limited	mA
PD		Power dissipation	Internally limited	mW
TSTG		Storage temperature range	- 55 to 150	°C
TOP		Operating 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 4.	Thermal data
Symbol	Parameter	DPAK		PPAK	SOT223	Unit
RthJC	Thermal resistance junction-case	8		8	25	°C/W
RthJA	Thermal resistance junction-ambient	100		100	110	°C/W

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Electrical characteristics	LD29080xx

4 Electrical characteristics

IO = 10 mA, (Note 4) TJ = 25 °C, VI = 3.5 V, VINH = 2V, CI = 330 nF, CO = 10 µF, unless otherwise specified.

Table 5.	Electrical characteristics of LD29080#15
Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VI	Operating input voltage	IO = 10mA to 800mA	2.5		13	V
VO	Output voltage	IO = 10mA to 800mA, VI = 3 to 7V	1.485	1.5	1.515	V
		TJ = -40 to 125°C	1.463		1.537
VO	Load regulation	IO = 10mA to 800mA		0.2	1.0	%
VO	Line regulation	VI = 3 to 13V		0.06	0.5	%
SVR	Supply voltage rejection	f = 120 Hz, VI = 3.8 ± 1V, IO = 400mA	65	75		dB
		(Note 1)
		IO = 10mA, TJ = -40 to 125°C		2	5
Iq	Quiescent current	IO = 400mA, TJ = -40 to 125°C		8	20	mA
		IO = 800mA, TJ = -40 to 125°C		14	35
		VI = 13V, VINH = GND, TJ = -40 to 125°C		130	180	µA
Isc	Short circuit current	RL = 0		1.2		A
VIL	Control input logic low	OFF MODE, TJ = -40 to 125°C			0.8	V
VIH	Control input logic high	ON MODE, TJ = -40 to 125°C	2			V
IINH	Control input current	VINH = 13V, TJ = -40 to 125°C		5	10	µA
eN	Output noise voltage	BP = 10Hz to 100kHz, IO = 100mA		60		µVRMS

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.

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

4In 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.

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LD29080xx	Electrical characteristics

IO = 10 mA, (Note 4) TJ = 25 °C, VI = 3.5 V, VINH = 2 V, CI = 330 nF, CO = 10 µF, unless otherwise specified.

Table 6.	Electrical characteristics of LD29080#18
Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VI	Operating input voltage	IO = 10mA to 800mA	2.5		13	V
VO	Output voltage	IO = 10mA to 800mA, VI = 3 to 7.3V	1.782	1.8	1.818	V
		TJ = -40 to 125°C	1.755		1.845
VO	Load regulation	IO = 10mA to 800mA		0.2	1.0	%
VO	Line regulation	VI = 3 to 13V		0.06	0.5	%
SVR	Supply voltage rejection	f = 120 Hz, VI = 3.8 ± 1V, IO = 400mA	62	72		dB
		(Note 1)
		IO = 150mA, TJ = -40 to 125°C (Note 2)		0.1
VDROP	Dropout voltage	IO = 400mA, TJ = -40 to 125°C (Note 2)		0.2		V
		IO = 800mA, TJ = -40 to 125°C (Note 2)		0.4	0.7
		IO = 10mA, TJ = -40 to 125°C		2	5
Iq	Quiescent current	IO = 400mA, TJ = -40 to 125°C		8	20	mA
		IO = 800mA, TJ = -40 to 125°C		14	35
		VI = 13V, VINH = GND, TJ = -40 to 125°C		130	180	µA
Isc	Short circuit current	RL = 0		1.2		A
VIL	Control input logic low	OFF MODE, TJ = -40 to 125°C			0.8	V
VIH	Control input logic high	ON MODE, TJ = -40 to 125°C	2			V
IINH	Control input current	VINH = 13V, TJ = -40 to 125°C		5	10	µA
eN	Output noise voltage	BP = 10Hz to 100kHz, IO = 100mA		72		µVRMS

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.

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

4In 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.

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Electrical characteristics	LD29080xx

IO = 10 mA, (Note 4) TJ = 25 °C, VI = 4.5 V, VINH = 2 V, CI = 330 nF, CO = 10 µF, unless otherwise specified.

Table 7.	Electrical characteristics of LD29080#25
Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VI	Operating input voltage	IO = 10mA to 800mA			13	V
VO	Output voltage	IO = 10mA to 800mA, VI = 3.5 to 8V	2.475	2.5	2.525	V
		TJ = -40 to 125°C	2.438		2.562
VO	Load regulation	IO = 10mA to 800mA		0.2	1.0	%
VO	Line regulation	VI = 3.5 to 13V		0.06	0.5	%
SVR	Supply voltage rejection	f = 120 Hz, VI = 4.5 ± 1V, IO = 400mA	55	70		dB
		(Note 1)
		IO = 150mA, TJ = -40 to 125°C (Note 2)		0.1
VDROP	Dropout voltage	IO = 400mA, TJ = -40 to 125°C (Note 2)		0.2		V
		IO = 800mA, TJ = -40 to 125°C (Note 2)		0.4	0.7
		IO = 10mA, TJ = -40 to 125°C		2	5
Iq	Quiescent current	IO = 400mA, TJ = -40 to 125°C		8	20	mA
		IO = 800mA, TJ = -40 to 125°C		14	35
		VI = 13V, VINH = GND, TJ = -40 to 125°C		130	180	µA
Isc	Short circuit current	RL = 0		1.2		A
VIL	Control input logic low	OFF MODE, TJ = -40 to 125°C			0.8	V
VIH	Control input logic high	ON MODE, TJ = -40 to 125°C	2			V
IINH	Control input current	VINH = 13V, TJ = -40 to 125°C		5	10	µA
eN	Output noise voltage	BP = 10Hz to 100kHz, IO = 100mA		100		µVRMS

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.

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

4In 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.

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