LD39050

Manufacturer

STMicroelectronics

Overview

Part 1: Markdown Summary

Part: LD39050

Type: Low Dropout (LDO) Voltage Regulator

Key Specs:

Input Voltage: 1.5 V to 5.5 V
Guaranteed Output Current: 500 mA
Typical Dropout Voltage: 200 mV at 500 mA load
Typical Quiescent Current: 20 μA at no load
Output Voltage Tolerance: ±2.0% at 25 °C
Output Noise Voltage: 30 μVRMS (10 Hz to 100 kHz)
Operating Junction Temperature Range: -40 °C to 125 °C

Features:

Ultra low-dropout voltage
Very low quiescent current
Very low noise without bypass capacitor
Wide range of output voltages (0.8 V to 4.5 V with 100 mV step, adjustable from 0.8 V)
Logic-controlled electronic shutdown
Compatible with ceramic capacitor COUT = 1 μF
Internal current and thermal limit
Power Good output
Short-circuit constant current limiting
Thermal protection

Applications:

Low power battery-powered applications
Mobile phones
Hard disks
Battery-powered systems

Package:

DFN6: 3x3 mm
DFN6: 2x2 mm

Features

Input voltage from 1.5 to 5.5 V
Ultra low-dropout voltage (200 mV typ. at 500 mA load)
Very low quiescent current (20 μA typ. at no load, 100 μA typ. at 500 mA load, 1 μA max. in OFF mode)
Very low noise without bypass capacitor
Output voltage tolerance: ± 2.0% @ 25 °C
500 mA 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
Compatible with ceramic capacitor COUT = 1 μF
Internal current and thermal limit
Package DFN6 (3x3 mm) and DFN6 (2x2 mm) • Temperature range: from -40 °C to 125 °C

Description The LD39050 provides 500 mA maximum current with an input voltage range from 1.5 V to 5.5 V and a typical dropout voltage of 200 mV. Stability is given by ceramic capacitors. The ultra low drop voltage, low quiescent current and low noise features make it suitable for low power batterypowered applications. Power supply rejection is 65 dB at low frequencies and starts to roll off at 10 kHz. The enable logic control function puts the LD39050 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 mobile phones, hard disks and battery-powered systems.

December 2019 DocID15470 Rev 5 1/28

Pin Configuration

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Symbol	Parameter	Value	Unit
VIN	DC input voltage	-0.3 to 7	V
VOUT	DC output voltage	-0.3 to VI + 0.3 (7 V max.)	V
EN	Enable pin	-0.3 to VI + 0.3 (7 V max.)	V
PG	Power Good pin	-0.3 to 7	V
ADJ	Adjustable pin	4	V
IOUT	Output current	Internally limited
PD	Power dissipation	Internally limited
TSTG	Storage temperature range	- 65 to 150	°C
TOP	Operating junction temperature range	- 40 to 125	°C

Electrical Characteristics

TJ = 25 °C, VIN = 1.8 V, CIN = COUT = 1 μF, IOUT = 10 mA, VEN = VIN, unless otherwise specified.

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
PG	Power Good output threshold	Rising edge		0.92* VOUT		V
PG	Power Good output threshold	Falling edge		0.8* VOUT		V
PG	Power Good output voltage low	Isink = 6 mA open drain output			0.4	V
ISC	Short-circuit current	RL = 0	600	800		mA
VEN	Enable input logic low	VIN = 1.5 V to 5.5 V, 40 °C < TJ < 125 °C			0.4	V
VEN	Enable input logic high	VIN = 1.5 V to 5.5 V, 40 °C < TJ < 125 °C	0.9			V
IEN	Enable pin input current	VEN = VIN		0.1	100	nA
tON	Turn-on time (4)			30		μs
TSHDN	Thermal shutdown			160		°C
TSHDN	Hysteresis			20		°C
COUT	Output capacitor	Capacitance (see typical performance characteristics for stability)	1		22	μF

Table 5. Electrical characteristics for the LD39050 (adjustable)

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VIN	Operating input voltage		1.5		5.5	V
VOUT	VOUT accuracy	VOUT >1.5 V, IOUT = 10 mA, TJ = 25 °C	-2.0		2.0	%
VOUT	VOUT accuracy	VOUT >1.5 V, IOUT = 10 mA, -40 °C<TJ<125 °C	-3.0		3.0	%
VOUT	VOUT accuracy	VOUT ≤ 1.5 V, IOUT = 10 mA		± 20		mV
VOUT	VOUT accuracy	VOUT ≤ 1.5 V, IOUT = 10 mA, -40 °C<TJ<125 °C		± 30		mV
ΔVOUT	Static line regulation	VOUT +1 V ≤ VIN ≤ 5.5 V, IOUT = 1 mA		0.01		%/V
ΔVOUT	Transient line regulation (1)	ΔVIN = 500 mV, IOUT = 10 mA, tR = 5 μs		10		mVp-p
ΔVOUT	Transient line regulation (1)	ΔVIN = 500 mV, IOUT = 10 mA, tF = 5 μs		10		mVp-p
ΔVOUT	Static load regulation	IOUT = 10 mA to 500 mA		0.002		%/mA
ΔVOUT	Transient load regulation (1)	IOUT = 10 mA to 500 mA, tR = 5 μs		40		mVp-p
ΔVOUT	Transient load regulation (1)	IOUT = 10 mA to 500 mA, tF = 5 μs		40		mVp-p
VDROP	Dropout voltage (2)	IOUT = 500 mA, VOUT > 1.5 V -40 °C < TJ < 125 °C	200		400	mV
eN	Output noise voltage	10 Hz to 100 kHz, IO = 100 mA		30		μVRMS
SVR	Supply voltage rejection VOUT = 1.5 V	VIN = VOUT(NOM) + 0.5 V+/-VRIPPLE VRIPPLE = 0.1 V, freq. = 1 kHz IOUT = 10 mA		65		dB
SVR	Supply voltage rejection VOUT = 1.5 V	VIN = VOUT(NOM) + 0.5 V+/-VRIPPLE VRIPPLE = 0.1 V, frequency =10 kHz IOUT = 100 mA		62		dB
IQ	Quiescent current	IOUT = 0 mA		20		μA
IQ	Quiescent current	IOUT = 0 mA, -40 °C < TJ ≤ 125 °C			50	μA
IQ	Quiescent current	IOUT = 0 to 500 mA		100		μA
IQ	Quiescent current	IOUT = 0 to 500 mA -40 °C < TJ < 125 °C			200	μA
IQ	Quiescent current	VIN input current in OFF mode: VEN = GND(3)	0.001		1	μA

Table 5. Electrical characteristics for the LD39050 (adjustable) (continued)

All transient values are guaranteed by design, not production tested
Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification does not apply to output voltages below 1.5 V

3. PG pin floating

Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just reaching 95% of its nominal value

TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 μF, IOUT = 10 mA, VEN = VIN, unless otherwise specified.

Parameter	Test conditions	Min	Typ	Max	Unit
VOUT	IOUT = 1 mA, VIN = VOUT + 1 V to 5.5 V, TJ = -40 to 125 °C	4.9	5	5.1	V
Line regulation	IOUT = 1 mA, VIN = VOUT + 1 V to 5.5 V			1	mV
Load regulation	VIN = VOUT + 1 V, IOUT = 1 mA to 500 mA			10	mV
Dropout voltage	IOUT = 500 mA,

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
PG	Power Good output threshold	Rising edge		0.92* VOUT		V
PG	Power Good output threshold	Falling edge		0.8* VOUT		V
PG	Power Good output voltage low	Isink = 6 mA open drain output			0.4	V
ISC	Short-circuit current	RL = 0	600	800		mA
VEN	Enable input logic low	VIN = 1.5 V to 5.5 V, -40 °C < TJ < 125 °C			0.4	V
VEN	Enable input logic high	VIN = 1.5 V to 5.5 V, -40 °C < TJ < 125 °C	0.9			V
IEN	Enable pin input current	VEN = VIN		0.1	100	nA
tON	Turn-on time (4)			30		μs
TSHDN	Thermal shutdown			160		°C
TSHDN	Hysteresis			20		°C
COUT	Output capacitor	Capacitance (see typical performance characteristics for stability)	1		22	μF

Symbol	Parameter	Test conditions	Min	Typ	Max	Unit
VOUT	Output voltage	IOUT = 5 mA, VIN = VOUT + 1 V	4.9	5	5.1	V
VOUT		IOUT = 5 mA, VIN = VOUT + 1 V to 16 V	4.85		5.15	V
VOUT		IOUT = 5 mA, VIN = VOUT + 1 V, TJ = -40 to 125 °C	4.8		5.2	V
ΔVOUT	Line regulation	IOUT = 5 mA, VIN = VOUT + 1 V to 16 V		2	10	mV
ΔVOUT	Load regulation	VIN = VOUT + 1 V, IOUT = 0 to 100 mA		5	20	mV
ΔVOUT		VIN = VOUT + 1 V, IOUT = 0 to 200 mA		10	40	mV
IQ	Quiescent current	IOUT = 0 mA, VIN = 16 V		1.5	3	mA
IQ		IOUT = 0 mA, VIN = 16 V, TJ = -40 to 125 °C			4	mA
IQ		IOUT = 100 mA, VIN = 16 V		2.5	4	mA
IQ		IOUT = 100 mA, VIN = 16 V, TJ = -40 to 125 °C			5	mA
IQ_SD	Quiescent current in shutdown	VIN = 16 V, SD = 0 V		0.01	1	μA
IQ_SD		VIN = 16 V, SD = 0 V, TJ = -40 to 125 °C			2	μA
PSRR	Power supply rejection ratio	IOUT = 5 mA, VIN = VOUT + 1 V, f = 120 Hz		60		dB
VSD_H	SD input high voltage		2			V
VSD_L	SD input low voltage				0.8	V
ISD_H	SD input high current	VSD = 2 V			1	μA
ISD_L	SD input low current	VSD = 0.8 V			1	μA
VDROP	Dropout voltage	IOUT = 100 mA, VOUT = 4.9 V		100	200	mV
VDROP		IOUT = 200 mA, VOUT = 4.9 V		150	300	mV
IOUT	Output current	VOUT = 4.9 V, VIN = VOUT + 1 V	200			mA
IOUT		VOUT = 4.9 V, VIN = VOUT + 1 V, TJ = -40 to 125 °C	150			mA
VNOISE	Output noise voltage	IOUT = 5 mA, VIN = VOUT + 1 V, 10 Hz to 10 kHz		40		μVrms
RIPPLE	Output ripple rejection	IOUT = 5 mA, VIN = VOUT + 1 V, 10 Hz to 10 kHz		60		dB
COUT	Output capacitor		1			μF
ESR	Equivalent series resistance				5	Ω
ESR			0.01			Ω
CIN	Input capacitor		1			μF
ESR	Equivalent series resistance				5	Ω
ESR			0.01			Ω

All transient values are guaranteed by design, not production tested
Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification does not apply to output voltages below 1.5 V
PG pin floating
Turn-on time is time measured between the enable input just exceeding VEN high value and the output voltage just reaching 95% of its nominal value

Absolute Maximum Ratings

		DFN6 (2x2 mm)	DFN6 (3x3 mm)
RthJA	Thermal resistance junction-ambient	65	55	°C/W
RthJC	Thermal resistance junction-case	6.5	10	°C/W

Table 2. Absolute maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All values are referred to GND.

Table 3. Thermal data


ESD	ESD protection voltage	HBM	2	kV
ESD	ESD protection voltage	CDM	500	V
ESD	ESD protection voltage	MM	0.3	kV

Table 4. ESD performance

Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VIN	Operating input voltage		1.5		5.5	V
VADJ	VADJ accuracy	IOUT = 10 mA, TJ = 25 °C	784	800	816	mV
		IOUT = 10 mA, -40 °C < TJ < 125 °C	776	800	824
IADJ	Adjustable pin current				1	μA
ΔVOUT	Static line regulation	VOUT +1 V ≤ VIN ≤ 5.5 V, IOUT = 1 mA		0.01		%/V
ΔVOUT	Transient line regulation(1)	ΔVIN = 500 mV, IOUT = 10 mA, tR = 5 μs		10		mVpp
		ΔVIN = 500 mV, IOUT = 10 mA, tF = 5 μs		10
ΔVOUT	Static load regulation	IOUT = 10 mA to 500 mA		0.002		%/mA
ΔVOUT	Transient load regulation(1)	IOUT = 10 mA to 500 mA, tR = 5 μs		40		mVpp
		IOUT = 10 mA to 500 mA, tF = 5 μs		40
VDROP	Dropout voltage(2)	IO = 500 mA, VOUT fixed to 1.5 V, 40 °C < TJ < 125 °C	200		400	mV
eN	Output noise voltage	10 Hz to 100 kHz, IOUT = 100 mA, VOUT = 0.8 V		30		μVRM
SVR	Supply voltage rejection VOUT = 0.8 V	VIN = 1.8 V+/-VRIPPLE, VRIPPLE = 0.25 V, frequency = 1 kHz, IOUT = 10 mA		65		dB
		VIN = 1.8 V+/-VRIPPLE, VRIPPLE = 0.25 V, frequency = 10 kHz, IOUT = 100 mA		62
IQ	Quiescent current	IOUT = 0 mA		20		μA
		IOUT = 0 mA, -40 °C < TJ < 125 °C			50
		IOUT = 0 to 500 mA		100
		IOUT = 0 to 500 mA, -40 °C<TJ<125 °C			200
		VIN input current in OFF mode: VEN = GND(3)	0.001		1

Thermal Information


ESD	ESD protection voltage	HBM	2	kV
ESD	ESD protection voltage	CDM	500	V
ESD	ESD protection voltage	MM	0.3	kV

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
LD39050 (ADJUSTABLE)	STMicroelectronics	—
LD39050 (FIXED)	STMicroelectronics	—
LD39050PU33R	STMicroelectronics	6-VDFN Exposed Pad

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