EC4223|350mA/250mA Advanced Current Regulator


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350mA/250mA Advanced Current Regulator

EC4223

Features

  • No external component required.

  • Constant 350mA/250mA constant sink current.

  • Output short / open circuit protection.

  • Low dropout voltage.

  • Low quiescent current at 212uA typical.

  • Build-in thermal protection.

  • Supply voltage range 2.7V ~ 6V.

  • 2KV HBM ESD protection.

  • Advanced CMOS process.

  • SOT-89 package

  • EN function is available upon request.

Description

The EC4223 is a low dropout current regulator rated for 350mA/250mA constant sink current. The constant sink current will ​​ ensure that the same amount of power is applied to the power LED and consequently maintain the uniform brightness throughout the possible voltage variations from the power source. The IC also features low quiescent current and is typically at 212uA. This will minimize the power consumption from the IC itself.

The IC has EN function built-in for applications where EN function or Dim function is needed. Please contact us directly if EN function is required.

EC4223 is presently available in low profile SOT89-3L packages.

 

 

 

 

 

 

 

 

 

 

 

Application

  • Power LED Driver.

  • LED Flashlight Torch.

  • LED Miner's Lamp.

  • Lighting.

 

 

 

Application Diagram

Pin Configuration

 

Ordering Information

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ EC4223 ​​ XX XX X

 

Output voltage:

AN:350mA

BN:250mA

RTape & Reel

B6:SOT89-3L

 

 

Absolute Maximum Rating (1)

Parameter

Symbol

Value

Units

Input Voltage

VDD

-0.3~7V

V

Output Voltage

VOUT

-0.3 to 4.6

V

Output Sink Current

IOUT

400

mA

Thermal Resistance, Junction-to-Ambient(SOT89)

ΘJA

180

°C/W

Lead Temperature (Soldering, 5 sec.)

 

260

°C

Junction Temperature

TJ

0 to +150

°C

Storage Temperature

TS

-40 to +150

°C

 

Electrical Characteristics

VDD = 3.7V; No Load; TJ = 25°C; unless otherwise noted

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Output Sink Current

ISINK

VOUT=0.4V

EC4223ANB6R

300

350

400

mA

EC4223BNB6R

200

250

300

Load Regulation

 

VOUT=0.2V to 3V

 

22

 

mA/V

Line Regulation

 

VDD=3V to 6V ,VOUT=0.2V

 

1.88

 

mA/V

Output Dropout Voltage (2)

VOUTL

 

 

150

 

mV

Supply Current Consumption

IDD

 

 

212

 

A

Note 1: Exceeding the absolute maximum rating may damage the device.

Note 2: Output dropout voltage: 90% x IOUT @ VOUT=200mV

 

 

 

 

 

Thermal Considerations

It is important that the thermal limit of the package is not exceeded. ​​ The EC4223 has built-in thermal protection. ​​ When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground. ​​ The power dissipation for a given application can be calculated as following:

The power dissipation (PD) is PD = IOUT * [VIN – VOUT]

The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 180°C/W for EC4223. ​​ EC4223 is designed to enter thermal protection at 150°C. ​​ For example, if TA is 25°C then the maximum PD is limited to about 0.7W. ​​ In other words, if IOUT(MAX) = 350mA, then [VIN – VOUT] cannot exceed 2V.

 

OUTLINE DRAWING SOT89-3L

 

 

 

 

 

 

 

 

 

 

 


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