200ma cmos positive low dropout voltage regulator lc2121n/n5 · 2009. 12. 7. · 200ma cmos...

Rev. A/LX

LC2121N/N5

200mA CMOS Positive Low Dropout Voltage Regulator

TAITRON COMPONENTS INCORPORATED www.taitroncomponents.com

Page 1 of 19 Tel: (800)-TAITRON (800)-824-8766 (661)-257-6060 Fax: (800)-TAITFAX (800)-824-8329 (661)-257-6415


General Description

• LC2121N/N5 is a positive low dropout voltage regulator fabricated by CMOS process. It consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit circuit for current protection and a chip enable circuit (5 Pin type only). LC2121N/N5 is ideal apply to various battery powered devices and with high supply voltage ripple rejection, low dropout voltage, low noise, high output voltage accuracy, and low current consumption

• There are 9 Fixed output voltages :1.2V, 1.3V,1.5V, 1.8V , 2.5V,2.8V,3.0V,3.2V and 3.3V versions

It is suitable for applications that required supply current up to 300mA

• LC2121N/N5 are available in SOT-23 , and SOT-23-5 packages Packages

Features

• Input Voltage up to 6.5V • Output Current up to 300mA • Low Dropout Voltage(except 1.2,1.3,1.5V versions):Typical 150mV at Io=150mA • Low Standby Current : Typical 0.1uA • High Ripple Rejection: Typical 70dB at f=1KHz • Extremely low Noise:30 uV (Vrms ) at f=10Hz to 100KHz • Excellent Line Regulation(Typical 4mV) and Load Regulation( Typical 12mV) • High Output Voltage Accuracy : ±2% • Excellent Line Transient Respond and Load Transient Respond • RoHS Compliance and Halogen Free

Applications • Mobile Phone, Cordless Phone • Wireless Communication Equipment • Portable Games • Cameras, Video Recorder • Sub-board Power supplies for Telecom Equipment • Battery Power Equipment

SOT-23

SOT-23-5


Rev. A/LX

LC2121N/N5

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Ordering Information

Pin Configuration

Pin Description

Outline SOT-23 SOT-23-5 Symbol Description

3 1 VIN Input Voltage 1 2 GND Ground

- 3 CE Active high enable input Logic High: enable; Logic Low :shutdown - 4 NC No connection

2 5 VO Output Voltage

SOT-23 SOT-23-5

1: GND 2: OUTPUT 3: INPUT 1: INPUT 2: GND 3: CE 4: NC 5: OUTPUT


Rev. A/LX

LC2121N/N5


Marking information:

PN Marking Code Outline Temperatue Range Halogen Free Halogen Free Packing Type

LC212N-1.2-08-RG70 GF9 Tape & Reel LC2121N-1.3-08-RG70 GG9 Tape & Reel LC2121N-1.5-08-RG70 GF1 Tape & Reel LC2121N-1.8-08-RG70 GF3 Tape & Reel LC2121N-2.5-08-RG70 GF4 Tape & Reel LC2121N-2.8-08-RG70 GF5 Tape & Reel LC2121N-3.0-08-RG70 GF6 Tape & Reel LC2121N-3.2-08-RG70 GF7 Tape & Reel

SOT-23 -40°C to 85°C

LC2121N5-3.3-08-RG70 GF8 Tape & Reel

LC2121N5-1.2-08-RG70 G1T Tape & Reel LC2121N5-1.3-08-RG70 G1R Tape & Reel LC2121N5-1.5-08-RG70 G1Z Tape & Reel LC2121N5-1.8-08-RG70 G1U Tape & Reel LC2121N5-2.5-08-RG70 G1V Tape & Reel LC2121N5-2.8-08-RG70 G1W Tape & Reel LC2121N5-3.0-08-RG70 G1X Tape & Reel LC2121N5-3.2-08-RG70 G3Z Tape & Reel

SOT-23-5 -40°C to 85°C

LC2121N5-3.3-08-RG70 G1Y Tape & Reel

Block Diagram

SOT-23 SOT-23-5


Rev. A/LX

LC2121N/N5


Absolute Maximum Ratings

Symbol Description Ratings Unit

VIN Input Voltage 6.5 V VCE Enable Input Voltage -03 to VIN+0.3 V IO Output Current 300 mA TJ Junction Temperature (Note) 150 ° C

TSTG Storage Temperature Range -65 to 150 ° C TLEAD(10 sec) Lead Soldering Temperature 260 ° C

θJA Thermal Resistance (Note 2) 250 ° C/W ESD(Human body model) ESD 2000 V ESD(Machine model) ESD 200 V

Recommend Operating Ratings (Note1)

Ratings Symbol Description Min Max Unit

VIN Input Voltage 2.0 6.0 V TJ Operating Junction Temperature -40 85 °C

Note1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Recommend operating ratings indicate conditions for which the device is functional, but do not guarantee specific specification limits. For guarantee specification and test conditions, see the Electrical Characteristics, the guarantee specification apply only for the test conditions listed.

Note2: The Max power dissipation is a function of TJ(max), θJA and TA .The maximum allowable power dissipation at any temperature is PD(Max)=(TJ(max)-TA)/ θJA, Exceeding the maximum allowable power dissipation will result in die temperature and the Regulator will go into thermal shutdown


Rev. A/LX

LC2121N/N5


Electrical Characteristics

For LC2121N/N5 (VIN=2.2V, CIN=1.0µF, CO =1.0µF, TJ=25°C, unless otherwise specified)

LC2121N/N5 Symbol Description Min. Type. Max.

Unit Test Conditions

VO Output Voltage 1.176 1.2 1.224 V 1mA≤IO≤30mA VIN Input Voltage - - 6 V - IO Output Current 200 - - mA VIN-Vo=1V

∆VLINE Line Regulation - 4 16 mV 2.2V≤VIN≤6V,Io=30mA ∆VLOAD Load Regulation - 12 40 mV 1mA≤IO≤80mA

IQ Quiescent Current - 25 50 uA Io=0mA ISC Standby Current - 0.1 1 uA VCE in OFF mode

ILIMIT Short Current Limit - 50 - mA VO=0V - 700 900 mV IO=10mA - 700 900 mV IO=100mA - 700 900 mV IO=150mA

VD Dropout Voltage

- 700 900 mV IO=200mA eN RMS Output Noise Voltage - 30 - µV 10Hz≤f≤100KHz

- ±120 - uV/°C ∆VO/∆T Output Voltage Temperature coefficient - ±100 - ppm/°C IO=30mA; -40°C≤TJ≤85°C

PSRR Power Supply Ripple Rejection Ratio - 70 - dB Ripple 0.5VPP, f=1KHz

VEH CE Input Voltage “High” 1.5 - - V - VEL CE Input Voltage “Low” - - 0.25 V - RPL CE Pull down Resistance 2.5 5 10 - MΩ

For LC2121N/N5 (VIN=2.3V, IO=40mA, CIN=1.0µF, CO =1.0µF, TJ=25°C, unless otherwise specified)






ILIMIT Short Current Limit - 50 - mA VO=0V


Rev. A/LX

LC2121N/N5


- 600 800 mV IO=10mA - 600 800 mV IO=100mA - 600 800 mV IO=150mA

VD Dropout Voltage












VD Dropout Voltage






Rev. A/LX

LC2121N/N5









VD Dropout Voltage









∆VLINE Line Regulation - 4 16 mV 3V≤VIN≤6V,Io=30mA ∆VLOAD Load Regulation - 12 40 mV 1mA≤IO≤80mA




Rev. A/LX

LC2121N/N5



VD Dropout Voltage












VD Dropout Voltage






Rev. A/LX

LC2121N/N5









VD Dropout Voltage













Rev. A/LX

LC2121N/N5



VD Dropout Voltage












VD Dropout Voltage






Rev. A/LX

LC2121N/N5


Typical Standard Application Circuit


Rev. A/LX

LC2121N/N5


Typical Characteristics Curves

Out

put V

olta

ge V

O (V

) O

utpu

t Vol

tage

VO

(V)

Output Current IO (mA)

Fig.1 VO-IO Fig.2 VO- IO

Out

put V

olta

ge V

O (V

)

Fig-3 VO-VIN Fig-4 VO-VIN


Input Voltage VIN (V)

Out

put V

olta

ge V

O (V

)

Input Voltage VIN (V)


Rev. A/LX

LC2121N/N5


Dro

pout

Vol

tage

VD (V

)

Operation Junction Temperature TJ(°C)

Out

put V

olta

ge V

O (V

)

Fig.7 VO-TJ Fig.8 VO-TJ


Fig-5 VD-IO

Dro

pout

Vol

tage

VD (V

)


Fig-6 VD-IO

Out

put V

olta

ge V

O (V

)

Operation Junction Temperature TJ(°C)


Rev. A/LX

LC2121N/N5


Fig.9 IS-VIN Fig.10 IS-VIN

Fig.11 IS-TJ Fig.12 IS-TJ

Sup

ply

Cur

rent

IS (u

A)

Input Voltage VIN (V) Input Voltage VIN (V)

Sup

ply

Cur

rent

IS (u

A)

Sup

ply

Cur

rent

IS (u

A)

Sup

ply

Cur

rent

IS (u

A)

Operation Junction Temperature TJ(°C) Operation Junction Temperature TJ(°C)


Rev. A/LX

LC2121N/N5


Fig.16-Load Transient Fig.15-Load Transient

Fig.13- Line Transient Fig.14-Line Transient

VIN=10V CIN=0.33uF COUT=0.1uF

∆V

O

(0.0

5V/D

IV)

Time (100us/Div)

VIN

(1

V/D

IV)

LM78L05

VIN

(1

V/D

IV)

∆V

O

(0.0

5V/D

IV)

Time (20us/Div)

IO

(100

mA

/DIV

) V

O

(0.1

V/D

IV)

VO

(0

.1V

/DIV

) IO

(1

00m

A/D

IV)

Time (200us/Div) Time (200us/Div)

IO=30mA CIN=1uF CO=1uF

IO=30mA CIN=1uF CO=1uF

VIN=2.2V CIN=1uF CO=1uF

VIN=4V CIN=1uF CO=1uF


Rev. A/LX

LC2121N/N5


Fig.17 PSRR-f

Frequency-f(Hz) Frequency-f(Hz)

Fig.18 PSRR-f

Pow

er S

uppl

y R

ejec

tion

Rat

io

PS

RR

(dB)

Pow

er S

uppl

y R

ejec

tion

Rat

io

PSR

R (d

B)


Rev. A/LX

LC2121N/N5


Dimensions in mm (inches)

SOT-23


Rev. A/LX

LC2121N/N5


SOT-23-5


Rev. A/LX

LC2121N/N5


How to contact us:

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Tel: (800) TAITRON (800) 824-8766 (661) 257-6060 Fax: (800) TAITFAX (800) 824-8329 (661) 257-6415

Email: [email protected] Http://www.taitroncomponents.com

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200ma cmos positive low dropout voltage regulator lc2121n/n5 · 2009. 12. 7. · 200ma cmos...

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