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Low DropOut Linear Voltage regulators

(LDOs)

July 2013

START

Electronica2012_Presentation_Master 16_9.pptx

ST Low DropOut

Linear voltage regulators

Complete range of low power and high

performances LDOs

Enlarging portfolio with cost-effective LDOs

for volumes applications

Wide offer of package solutions, from

through-hole to the smallest Chip Scale

Package

Key features Portfolio drivers

Outstanding power efficiency figures

State-of-the art key merit parameters

Minimized PCB area occupation

Key features Main benefits


What is an LDO? Where can you find it?

What is an LDO?

Linear Regulation is a cost effective mean to

deliver a stable and regulated output voltage,

with design simplicity and few external

components.

Linear regulators are the basic building block

of almost every power supply.

The LDO is a Linear voltage regulator which

operates with a very low input-output voltage

differential (dropout voltage), offering improved

efficiency.

In those applications where the Output current is

less than or equal to a few amps and the Output

voltage (VOUT) is close to the input one (VIN), the

LDOs provide the best cost/performance

tradeoff.

You can find ST’s LDOs in:

…and…


Here!

What is an LDO? Where can you find it?


Basic parameters: The waterfall analogy 5

In an LDO the needed voltage gap between the

input and the output (Dropout) is minimized, to

the good of the System Efficiency.

The Output current is almost the same of the

Input one, minus a small amount needed to

bias the LDO internal circuits (Quiescent

current)

Apart from the “minimum dropout voltage” and

the “quiescent current” that are directly related

with efficiency and power consumption, there

are a few other merit parameters that have to

be evaluated when designing with a LDO:

Static parameters: Line, Load and

temperature regulation

Dynamic parameters: PSRR, NOISE,

transient response

Package dimension and thermal dissipation

Output Voltage

Input Voltage

Input current

Output current Quiescent current

SOURCE

LOAD

DROPOUT

VOLTAGE

How to choose an LDO?

PSRR (or SVR): indicates how well an LDO

rejects the ripple coming from the input at

various frequencies. It is specified in dB (the

higher ,the better)

NOISE: is the level of noise generated internally

by the LDO circuitry (the lower ,the better).

It is generally specified as integral noise over a

frequency band.

Merit parameters


Selecting an LDO: LDOs Families@ST

Ultra Low dropout

Low quiescent current

Low noise/High PSRR

Miniature

ST offers a complete portfolio of high performance

LDOs, with state-of-the-art figures on the key merit

parameters


Ultra Low DropOut:

Low voltage (5.5V), Low current (<300mA) 7

Ultra low dropout (down to 50mV)

Very low quiescent current (down to 20µA)

High PSRR and Low Noise

Fast transient response

Wide range of miniaturized packages

Higher efficiency, lower power consumption


Easy design and implementation

Excellent dynamic performances

Key Features

Main benefits

This family of LDOs is designed for

the “hand-held” world: • Cell Phones and Tablets

• MP3 players and Games

• DSC

• …

Applications

SOT323-5L

(SC70)

SOT323-5L

(SC70)SOT23-5LSOT23-5L

SC70 SOT23 CSP DFN 3x3 DFN6 1.2x1.3


Ultra low DropOut: Low voltage (5.5V), Low current (<300mA) 8

Higher efficiency, lower power dissipation



Good dynamic performances (PSRR and Noise)

SOT23-5L, SC70, DFN1.2x1.3 and CSP

packages

Main benefits

300mA

200mA

150mA LD39015/LD39115

Drop: typ 80mV

LDCL015

Drop: typ 70mV

CAPLESS

LD3985

Drop: typ 60mV

LD39030

Drop: typ 200mV

LDK120

Drop: typ 150mV

LDK130

Drop: typ 200mV

Output

Current

Low power µC supply (STM32, etc)

Cell Phones and Cordless

Game consoles and accessories

Battery powered equipments

Applications

LDCL015 150mA LDO

NO EXTERNAL CAPs

NEEDED


Ultra Low DropOut: Low voltage (5.5V), Medium current (>300mA) 9

Higher efficiency, lower power dissipation



Good dynamic performances (PSRR and Noise)

DFN 3x3 and 4x4 , DPAK and PPAK packages

Main benefits

1.5A

1A

500mA

LD39080

Drop: typ

150mV LD39050

Drop: typ

200mV

LD39150

Drop: typ

200mV

Output

Current

DSP and FPGA power supply (STM32, etc)

TV and STB

Computer and Data storage

Game consoles and accessories

Telecom infrastructure

Applications

LDFM

Drop: typ 150mV

16V VIN

LD39100

Drop: typ

200mV

LDF

Drop: typ 200mV

16V VIN

LD49300

Drop: typ

220mV

2A

3A LD39300

Drop: typ

200mV

LD39200

Drop: typ 130mV LOW

VIN, HIGH PSRR


Ultra Low DropOut:

LD39200 – 2A high performance LDO 10

Very low startup voltage: from 1.25 to 6 V

Very low output voltage: from 0.5V

Guaranteed output current: 2A

Ultra low drop: 130 mV typ. At 2A

High PSRR: 70 dB @ 1kHz, 40 dB @ 1MHz

Very low noise: 45µVRMS/VOUT

Low quiescent current: 100 µA typ @ no load

Enable and Power Good functions

Reverse current protection

Packages: DFN6 3x3 and DFN8 4x4

Main benefits and Applications

• This high performance, medium power LDO is

designed for demanding applications.

• It offers a best-in-class dropout performance

without the need of additional biasing voltage.

• It is designed to provide the maximum efficiency in

those environment where DC-DC switching

regulation is not allowed.

Typical applications are

Digital IC Power Supply

Telecom infrastructures

Consumer and Industrial Equipments POL

FPGA, DSP, ASIC dedicated Power Supply


Low quiescent current LDOs:

the Battery’s Ally 11

Ultra low quiescent current (Iq)

(down to 1.4µA)

Very low dropout


Output current from 50 to 150mA

Extended input voltage range (up to 24V on

ST715)

Maximize battery life

Reduce standby power consumption



Key Features

Main benefits This family of LDOs is designed for those applications

where power consumption is at a premium:

• Medical/Health care equipments

• Smoke detectors and alarms

• Real-time clock backup power

• Electronic sensors

• Portable Consumer

Applications



the Battery’s Ally 12

STLQ50

ST715

STLQ015

LD39130

2.3 to 12

2.5 to 24

1.5 to 5.5

1.4 to 5.5

Ou

tpu

t c

urr

en

t [

mA

]

Qu

ies

ce

nt c

urre

nt [µ

A]

Device Input voltage [V]

NEW!

Key Benefits

Maximize battery life

Reduce standby power consumption

Wide VIN range offer, for maximum Flexibility

LD39130: Automatic Green Mode operation

Packages

STLQ50: SC70 (2x2 mm2)

STLQ015: SOT666 (1.6x1.6 mm2)

ST715: SOT23-5L (2x2 mm2) & DFN8 (3x3 mm2)

LD39130: CSP4 bumps (0.69x0.69mm2) & DFN6 -

1.2x1.3 mm2



the Battery’s Ally

Input voltage: from 1.4 to 5.5 V

Guaranteed output current: 300 mA

Automatic green mode for low consumption at

light loads:

1 μA typ in low power mode

55 μA typ @ 300 mA load

0.1 μA typ in off mode

High PSRR: 70dB @ 1kHz, 65dB @ 10kHz

Very low dropout voltage: 300 mV typ @ 300

mA

Internal soft start

Packages:

CSP 4 bumps 0.69 mm x 0.69 mm

DFN 6 leads - 1.2 mm x 1.3 mm

Input Voltage from 1.5V to 5.5V


Ultra Low and constant quiescent current:

1 μA (typ) at no load

1.4 μA (typ) at 150 mA load

1 nA (typ) in OFF mode

Logic controlled enable pin

Internal Current and Thermal Limit

Compatible with ceramic capacitor

Package:

SOT666-6leads 1.6 mm x 1.6 mm


Low noise & High PSRR LDOs:

Make your DC more silent 14

Ultra low noise (down to 6.3µVRMS)

Very High PSRR (up to 92dB)


Low quiescent current (20µA)


Excellent output signal quality



Low current consumption

Key Features

Main benefits

This family of LDOs is designed for noise

sensitive applications: • RF modules, LNA, IF and VCO

• Signal conditioning, ADC

• Instrumentation, Medical equipments

• DC-DC low noise post-regulation

• Mobile phones and tablets

Applications






Ultra low noise: 6.3 μVRMS from 10 Hz to 100 kHz

Very high PSRR: 92 dB up to 10kHz



Very low dropout voltage: 90 mV typ @ 150 mA

Packages:

ULTRA low-noise Architecture

Main benefits

Thanks to the ultra low noise design, together with a

very high PSRR figure, the device provides best-in-

class voltage regulation.

It is perfect as a post-regulator for noise-sensitive

application, as well as a simple linear power supply

for low noise-battery powered devices.






Very low noise: 20 μVRMS/VOUT from 10 Hz to 100 kHz

Very high PSRR: 76 dB up to 10kHz





SOT23-5LSOT23-5L

SOT23-5LSOT23-5L


Miniature LDOs:

High performances are tiny 17

DFN, CSP, SC-70 and SOT666

miniaturized packages as small as

0.69x0.69mm2

Very low dropout (down to 50mV)

Very low quiescent current (down to 20µA)

High PSRR and Low Noise


Higher efficiency, lower power consumption


Excellent dynamic performances

Key Features

Main benefits

This family of LDOs is designed for those

application where space is at a premium: • Smartphones and tablets

• Sport accessories

• Medical equipments, hearing aids

• Bluetooth and remotes

• Electronic gadgets

Applications


Miniature LDOs:

High performances are tiny 18

All the best performances of an ST’s LDO

fit into the smallest packages available.

ST’s miniature LDOs can be much smaller

than a rice seed.

The ultra-small, high performance LDOs are

particularly suitable for the latest generation

of portable devices.

CSP4 0.69 x 0.69

CSP4 0.8 x 0.8

DFN4 1x1

CSP4 1.1 x 1.1

DFN6 1.2 x 1.3

SOT666 1.6 x1.6

SC70 2x2

DFN6 2x2

LD39130SJ- 300mA,green mode

LD39115J/LD39030SJ

150 and 300mA, high PSRR

LD39020 – 200mA, HIGH PSRR

LD39015J – 150mA, soft start

LDK120-130 – 200/300mA

LD39130SPUR – 300mA green mode

STLQ015 – 150mA, Ultra low Iq

LD59015 – 150mA, Higr PSRR

LDLN015 – 150mA, Ultra low noise, Higr PSRR

NEW! LD39115J

PCB space

occupation

example

LD39020

1x1 mm2

200mA LDO


19

Input voltage: from 1.4V to 5.5V

Very Low Dropout Voltage: (300mV Typ @ 200mA)

2% and 0.5% (coming soon) output voltage precision

Very Low Quiescent Current

20µA TYP @ no load

100µA MAX @ 200mA load

0.1µA MAX in OFF mode

Wide Output voltage range choice:

from 0.8V to 5Vin in 50mV step

Logic Controlled Electronic Shutdown

Internal Soft Start

Output Voltage Discharge Feature

Compatible with Ceramic Capacitors COUT=1µF

Available in DFN 4L 1x1mm2


• This high performance, miniature LDO is designed to

cover the need for localized low current POLs in the

latest generation of Smartphones/Tablets, such as

Samsung Galaxy Family (S3, S4,.. Note)

• DFN1x1 is more and more becoming the standard

for low current POL replacing the SC70 and SOT23

• BCD8_SP Technology=maximum performance/cost

ratio

• Die Size: 0.47x0.47mm2

• 0.5% output tolerance is reached by Laser Fuse

technology

• 20 versions of output voltage will be available

immediately, thanks to “Multi-output wafer”

• LD39020 is going to be the first LDO to be

manufactured in ST’s “Bumpless CSP”

for a total package dimension of

0.5x0.5mm2

Miniature LDOs:

LD39020-200 mA, High PSRR LDO in DFN4-1x1


20


• Thanks to the ultra-miniature packages and to the

green mode function, this high performance LDO can

easily fit into very small portable appliances,

maximizing the battery life:

• Smartphones/Tablets

• Media players and accessories

• Healthcare/medical devices (hearing aids…)

• Bluetooth headphones

• Remote controls and sensors

Miniature LDOs:

LD39130 - 300 mA, Ultra low Iq LDO in CSP 0.69 x 0.69



Automatic green mode for low consumption at light

loads:

1 μA typ in low power mode

55 μA typ @ 300 mA load

0.1 μA typ in off mode

Fixed versions from 0.8 V up to 4.0V in 100mV step

Adjustable version (0.8V) available in DFN 6L 1.2x1.3

High PSRR: 70dB @ 1kHz, 65dB @ 10kHz


Internal soft start

Miniature Packages:


http://www.google.com/url?sa=i&rct=j&q=bluetooth+headphones&source=images&cd=&cad=rja&docid=2eAA90KRq8YxQM&tbnid=uGKtlPrfCwvlIM:&ved=0CAUQjRw&url=http://www.jaybirdgear.com/bluebuds-x-bluetooth-headphones/&ei=3CzxUeSkKoa0PJmUgbgO&psig=AFQjCNH65C2m8KPXzvss1jFXei1tlaQoGg&ust=1374846542553111

The cost-effective program LDOs:

The value of performances 21

Low dropout voltage

Good noise & PSRR figures


Wide range of packages available

Well balanced cost/performance ratio


Good dynamic performances

Key Features

Main benefits

This family of LDOs is designed for high volume

application that need the perfomance of an LDO

at competitive prices: • Consumer applications

• Electronic gadgets and games

• Sport accessories

• Cell Phones, Cordless

Applications


The cost-effective program LDOs:

LDKxx and LDLxx family 22

LDK120

• 200mA, Low Drop, Noise reduction pin

• Available in SOT23-5L, SC70, DFN6 1.2x1.3

LDK130

• 300mA, Low Drop, Noise reduction pin


LDK220

• 200mA, Low Drop


LDKxx:

Low current (up to 300mA)

LDL112

• 1.2A, very low drop, Reverse current protection

• Available in SO8, DFN6 2x2 and 3x3

LDL212

• 1.2A, very low drop

• Available in SO8, DFN6 2x2 and 3x3

LDLxx:

Medium current (1.2A)


LDOs portfolio

Part Number Maximum

current [mA] Dropout voltage

@ max load [mV]

Quiescent

current @ no

load (µA)

Input

Voltage

range [V]

PSRR typ. @

1Khz [dB] Noise [µVrms]

LDCL015 150 50 120 1.8-5.5 52 40

LD3985 150 60 85 2.5-6 60 30

LD39015 150 80 18 1.5-5.5 65 29

LD39115 150 80 20 1.5-5.5 74 30

STLQ015 150 115 1 1.5-5.5 40 75

LDK120 200 150 30 1.9-5.5 60 51

LDK130 300 200 30 1.9-5.5 60 51

LD39030S 300 200 20 1.5-5.5 62 30

Ultra Low dropout – Low current ( ≤ 300mA)

NEW!


LDOs portfolio

Part Number Maximum

current [A]

Typ Dropout

voltage @ max

load [mV]

Quiescent

current @

no load (µA)

Input

Voltage

range [V]

PSRR typ. @

1Khz [dB] Noise [µVrms]

LDFM 0.5 125 150 2.5-16 62 45

LD39050 0.5 200 20 1.5-5.5 65 30

LD39100 1 200 20 1.5-5.5 65 30

LDF 1 200 150 2.5-16 62 45

LD39200 2 110 100 1.25-6 70 45

LD39080 0.8 150 800 2.5-6 55 100

LD39150 1.5 200 800 2.5-6 55 100

LD39300 3 200 1000 2.5-6 55 100

LD49150 1.5 120 4000 1.4-5.5 68 65

LD49300 3 220 4000 1.4-5.5 68 65

Ultra Low dropout – Medium current ( > 300mA)

NEW!


LDOs portfolio

Part Number

Maximum

current [A]

Quiescent current

@ no load (µA)

Typ Dropout

voltage @ max

load [mV]

Input

Voltage

range [V] PSRR typ. [dB] Noise [µVrms]

STLQ50 50 3.5 400 2.3-12 30 560

ST715 85 3.8 500 2.5-24 45 95

LD39015 150 18 80 1.5-5.5 65 29

LD39115 150 20 80 1.5-5.5 74 30

LDLN015 150 17 86 2.1-5.5 92 6.3

STLQ015 150 1 115 1.5-5.5 40 75

LD59015 150 31 150 2.3-5.5 76 20

LD39030 300 20 200 1.5-5.5 62 30

LD39130 300 1-55 300 1.4-5.5 70 38

LD39050 500 20 200 1.5-5.5 65 30

LD39100 1000 20 200 1.5-5.5 65 30

NEW!



LDOs portfolio

Part Number

Maximum

current [A]

Quiescent current

@ no load (µA)

Typ Dropout

voltage @ max

load [mV]

Input

Voltage

range [V]

PSRR typ.

@1kHz [dB] Noise [µVrms]

LD39015 150 18 80 1.5-5.5 65 29

LD39115 150 20 80 1.5-5.5 74 30

LDLN015 150 17 86 2.1-5.5 92 6.3

LD3985 150 60 85 2.5-6 60 30

LD59015 150 31 150 2.3-5.5 76 20

LD39030 300 20 200 1.5-5.5 62 30

LD39130 300 1-55 300 1.4-5.5 70 38

LD39050 500 20 200 1.5-5.5 65 30

LD39100 1000 20 200 1.5-5.5 65 30

NEW!

Low noise/High PSRR


LDOs portfolio

Part Number Maximum

current [A] Package

Package dimension

[mm2] Characteristics

Input Voltage

range [V]

STLQ50 50 SC70 2x2 Ultra low IQ 1.5-5.5

LD39015J 150 CSP4 bumps 1.1x1.1 Low noise 1.5-5.5

LD39115 150 CSP4 bumps 0.8x0.8 Low noise 1.5-5.5

LDLN015 150 DFN6 2x2 Ultra low noise 2.1-5.5

LD59015 150 SC70 2x2 High PSRR 2.5-6

STLQ015 150 SOT666 1.6x1.6 Ultra low Iq 1.5-5.5

LD39020 200 DFN4 1x1 High PSRR 1.5-5.5

LDK120 200 SC70

DFN6

2x2

1.2x1.3 Cost-effective 1.9-5.5

LDK130 300 SC70

DFN6

2x2

1.2x1.3 Cost-effective 1.9-5.5

LD39030 300 CSP4 bumps 0.8x0.8 Low noise 1.5-5.5

LD39130 300 CSP4 bumps

DFN6

0.69x0.69

1.2x1.3

Green mode

Ultra low Iq 1.5-5.5

NEW!

Miniature


LDO linear voltage regulatorscompel.ru/wordpress/wp-content/uploads/2013/11/LDOs-Jul2013.pdf · How...

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