EC3121|300mA 2CH Low Dropout Linear Regulator


規格書下載


 

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

EC3121

 

 

 

General Description

 

The EC3121 ​​ is ​​ a ​​ low  ​​​​ noise  ​​​​ and  ​​​​ high  ​​​​ accuracy, high ripple rejection ratio, low dropout, dual CMOS LDO voltage regulators with enable function. The EN function ​​ allows ​​ the ​​ output ​​ of ​​ each ​​ regulator ​​ to ​​ be turned off independently, resulting in greatly reduced power consumption.

 

The current ​​ limit ​​ of ​​ EC3121 ​​ is ​​ over ​​ 350mA ​​ per channel and also operates as a short protection for the output current limiter. The output voltage for each regulator is set independently by metal trimming.

 

The  ​​​​ EC3121  ​​​​ comes  ​​​​ with  ​​​​ low  ​​​​ design  ​​​​ cost  ​​​​ and outstanding ​​ output ​​ stability ​​ and ​​ its ​​ compatibility ​​ of working  ​​​​ with  ​​​​ low  ​​​​ ESR  ​​​​ ceramic  ​​​​ capacitors  ​​​​ is undoubted.  ​​​​ This  ​​​​ high  ​​​​ level  ​​​​ output  ​​​​ stability  ​​​​ is maintained even during frequent load fluctuations, due to the excellent transient response performance and high  ​​​​ PSRR  ​​​​ achieved  ​​​​ across  ​​​​ a  ​​​​ broad  ​​​​ range  ​​​​ of frequency, ​​ so ​​ these ​​ ICs ​​ are suitable ​​ for hand-held communication equipment power supply.

 

Function Block Diagram

Features

 

Input Voltage ​​ Range: 2.5V to 6.0V

 

Varied Fixed Output Voltage Combinations

 

150mV Dropout at 100mA Output Current

 

(VOUT2.8V)

Low Quiescent Current

 

Standby Current 1uA(Typ.)

 

Current Limit and Short Current Protections

 

Fast Transient Response

 

Low ESR Capacitor Compatible(X7R,X5R)

 

Available in the 6-Pin Pb-Free SOT23-6L Packages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 1 of 70C04N-Rev.F005

 

 

 

 

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

EC3121

 

 

 

 

Ordering Information

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MD2.7V+1.8V(Vout1+Vout2) D71.8V+1.2V(Vout1+ Vout2) DS1.8V+3.3V(Vout1+Vout2) 7D1.2V+1.8V(Vout1+ Vout2) 7S1.2V+3.3V(Vout1+Vout2) DM1.8V+2.7V(Vout1+Vout2) DN1.8V+2.8V(Vout1+Vout2)

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ ​​ AS1.5V+3.3V(Vout1+Vout2)

 

 

Marking Information

 

 

Device

Marking

Information

Package

Type

 

Remarks

 

 

 

EC3121VVB3R

 

 

3121

VVYW

 

 

 

SOT23-6L

 

1.VVOutput Voltage(ExAN1.5V+2.8V;DN1.8V+2.8V)

2.YYear code(D=2013;E=2014;F=2015)

3.W Week Code(The big character of A~Z is for the week of

1~26, and small a~z is for the week of 27~52.)

 

 

 

 

 

Pin Configurations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 2 of 70C04N-Rev.F005

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

 

 

Absolute Maximum Ratings (Note1)

Power Input Voltage (VIN)(GND-0.3)~6V

 

Enable Voltage (VEN1/VEN2)(GND-0.3)~VIN

 

Output Voltage(VOUT1+VOUT2)(GND-0.3)~VIN

 

Storage Temperature Range(TSTG)-40 to 150

 

 

Thermal Information(Note2)

 

EC3121

 

Thermal Resistance Junction to Ambient(JA) SOT23-6L

 

 

 

250°C/W

Junction to Case(θJC)

 

SOT23-6L

 

180/W

 

Power Dissipation, PD @ TA=25°C (Note 3)

 

SOT23-6L250mW

 

 

Recommended Operating Conditions(Note 4)

Operating Junction Temperature Range(TJ)-40 to +150

 

Operating Ambient Temperature Range(TOPA)-40 to +85

 

 

Note 1:Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability.

Note 2:Thermal Resistance is specified with approximately 1 square of 1 oz copper.

Note 3:Thermal Resistance is specified with the component mounted on a low effective thermal conductivity test

board in free air at TA=25°C.

Note 4:The device is not guaranteed to function outside its operating conditions.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 3 of 70C04N-Rev.F005

 

 

 

 

 

 

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

 

 

Electrical Characteristics (Unless otherwise noted , TA=25°C)

 

EC3121

 

Symbol

Parameters

Condition

Min

Typ

Max

Units

VIN

Input Voltage

 

2.5

 

5.5

V

 

VOUT

 

Output Voltage Accuracy

IOUT=1mA,VIN=5V VOUT>2.0V

 

-2

 

 

2

 

%

IOUT=1mA,VIN=5V VOUT2.0V

 

-0.04

 

 

0.04

 

V

 

ICC

 

Quiescent Current

 

IOUT1,OUT2=0mA,VIN=5V

 

 

60

 

100

 

uA

 

 

VDROP

 

Dropout

Voltage(Note 5)

IOUT=0.2A,VO=VO-2%,VOUT=1.5V

 

100

1200

mV

IOUT=0.2A,VO=VO-2%,VOUT=1.8V

 

700

900

mV

IOUT=0.2A,VO=VO-2%,VOUT>2.5V

 

300

400

mV

 

ISC

Short Circuit Current

 

VOUT<1.0V,each channel

 

 

150

 

 

mA

VLINE

Line Regulation

IOUT=1mA,VIN=VOUT+1V to 6.0V

 

0.2

0.3

%/V

VLOAD

Load Regulation

IOUT=1~100mA,VIN=VOUT+1V

 

0.01

0.03

%/mA

 

PSRR

 

Ripple Rejection

f=10kHz, Ripple 0.5VP-P, VOUT>1.7V,VIN-VOUT=1.0V VOUT1.7V,VIN-VOUT=1.2V IOUT=10mA

 

 

65

 

 

dB

 

VOUT/T

Output Voltage Temperature Coefficient

 

IOUT=1mA,-40℃≦TJ85

 

 

±100

 

 

ppm/

 

VENH

EN Input Voltage H

 

 

1.2

 

 

 

V

 

VENL

EN Input Voltage L

 

 

 

 

0.6

 

V

 

IEN

Enable Pull-high Current

 

VEN1,2=0V

 

 

1

 

2

 

uA

ISD

Shutdown Current

IOUT1,2=0mA, VIN=5V,VEN1,2=0V

 

2

4

uA

eN

Output Noise

BW=10Hz to 100kHz,Co=1uF

 

100

 

uVrms

 

RLOW

On Resistance for Auto- Discharge

 

VEN=0V

 

 

60

 

 

Ω

Note 5: Dropout voltage is tested by reducing input voltage until the output drops 2% below its nominal value.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 4 of 70C04N-Rev.F005

 

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

 

 

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Application Information

 

EC3121

 

The EC3121 requires input and output decoupling capacitors. The device is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance ​​ (see Capacitor Characteristics ​​ Section). Please note that linear regulators ​​ with a low dropout ​​ voltage have ​​ high ​​ internal loop  ​​​​ gains  ​​​​ which  ​​​​ require  ​​​​ care  ​​​​ in  ​​​​ guarding  ​​​​ against oscillation caused by insufficient decoupling capacitance.

 

Input Capacitor

 

An ​​ input capacitance ​​ of ​​ 1µF ​​ is ​​ required ​​ space ​​ between input ​​ pin  ​​​​ and ​​ ground  ​​​​ pin ​​ directly (the amount ​​ of the capacitance ​​ may be ​​ increased ​​ without ​​ limit).The input capacitor must be located less than 1cm ​​ from the device to assure input stability. A lower ESR capacitor allows the use of less capacitance, while  ​​​​ higher ESR  ​​​​ type (like aluminum electrolytic)requires more capacitance.Capacitor types (aluminum, ceramic and tantalum) can be mixed in parallel, but the total equivalent input capacitance ​​ ESR must be ​​ defined as ​​ above ​​ to stable operation. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must ​​ be considered  ​​​​ when  ​​​​ selecting ​​ the  ​​​​ capacitor  ​​​​ to ensure ​​ the ​​ capacitance  ​​​​ will  ​​​​ be  ​​​​ 1µF  ​​​​ over ​​ the  ​​​​ entire operating temperature range.

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 5 of 70C04N-Rev.F005

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

EC3121

 

 

 

Output Capacitor

The EC3121 ​​ is ​​ designed ​​ specifically to ​​ work ​​ with ​​ very small ceramic ​​ output ​​ capacitors. A ceramic capacitor (temperature characteristics X7R, X5R) in 1µF is suitable for the EC3121 application.The recommended minimum capacitance for the device is 1µF(X5R or X7R dielectric ceramic), between VOUT and GND for stability, but it may be ​​ increased ​​ without limit. Higher ​​ capacitance ​​ values help to improve transient. The output capacitor's ESR is critical ​​ because ​​ it ​​ forms a ​​ zero to provide ​​ phase ​​ lead which is required for loop stability.

 

Thermal Considerations

The ​​ EC3121  ​​​​ series  ​​​​ can  ​​​​ provide  ​​​​ a ​​ current  ​​​​ of  ​​​​ up ​​ to 300mA/channel over the full operating junction temperature range. However, the maximum ​​ output current must be debated at higher ambient temperature to ensure the junction ​​ temperature ​​ does ​​ not ​​ exceed ​​ 125°C. With all possible conditions, the junction temperature must be within the range ​​ specified ​​ under ​​ operating ​​ conditions. Power dissipation can be calculated based on the output current and the voltage drop across regulator.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 6 of 70C04N-Rev.F005

 

 

 

 

 

 

300mA 2CH Low Dropout Voltage

Linear Regulators

 

EC3121

 

 

 

 

 

Package Dimension OUTLINE DRAWING SOT23-6L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E-CMOS Corp. (www.ecmos.com.tw)Page 7 of 70C04N-Rev.F005


規格書下載

規格是死的,設計是活的
我們提供具有靈活彈性的客製化IC與模組設計

告訴我們你想做的產品項目吧!

規格是死的,設計是活的
我們提供具有靈活彈性的客製化IC與模組設計

告訴我們你想做的產品項目吧!