RT8223A Ver la hoja de datos (PDF) - Richtek Technology

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componentes Descripción

Fabricante

RT8223A

High Efficiency, Main Power Supply Controller for Notebook Computers

Richtek Technology 

RT8223A/B

Electrical Characteristics

(VIN = 12V, EN = ENC = 5V, ENTRIP1 = ENTRIP2 = 2V, No Load on VREG5, VREG3, VOUT1, VOUT2 and REF, TA = 25°C,

unless otherwise specified)

Parameter

Symbol

Test Conditions

Min Typ Max Unit

Input Supply

VIN Standby Supply

Current

VIN Shutdown Supply

Current

Quiescent Power

Cons umption

IVIN_SBY

VIN = 6V to 25V, Both SMPS Off,

EN = 5V, ENC = GND

IVIN_SHDH VIN = 6V to 25V, ENTRIPx = EN = GND

Both SMPSs On, FBx = SKIPSEL = REF

VOUT1 = 5.3V, VOUT2 = 3.5V (Note 5)

-- 200 --

μA

-- 20 40 μA

--

5

7 mW

SMPS Output and FB Voltage

VOUT1 Output Voltage in

Fixed Mode

VOUT1

VIN = 6V to 25V, FB1= REF or 5V,

SKIPSEL = REF

4.975 5.05 5.125 V

VOUT2 Output Voltage in

Fixed Mode

FBx in Output Adjustable

Mode

Output Voltage

Adjustment Range

FBx Adjustable-mode

Threshold Voltage

VOUT2

FBx

VOUT x

DC Load Regulation

VLOAD

Line Regulation

On Time

VLINE

VIN = 6V to 25V, FB2 = REF or 5V,

SKIPSEL = REF

VIN = 6V to 25V

3.285 3.33 3.375 V

1.975 2 2.025 V

SMPS1, SMPS2

2

-- 5.5

V

Fixed or Adj-Mode comparator threshold 0.2 0.4 0.55 V

Either SMPS, SKIPSEL = REF, 0 to 5A

-- −0.1 --

Either SMPS, SKIPSEL = VREG5, 0 to 5A -- −1.7 --

%

Either SMPS, SKIPSEL = GND, 0 to 5A

-- −1.5 --

Either SMPS, VIN = 6V to 25V

-- 0.005 -- %/V

On-Time Pulse Width

Minimum Off-Time

Ultrasonic Mode

Frequenc y

Soft Start

tU GATE x

tL G ATE x

TONSEL = GND

TONSEL = REF

TONSEL = VREG5

VOUT1 = 5.05V

VOUT2 = 3.33V

VOUT1 = 5.05V

VOUT2 = 3.33V

VOUT1 = 5.05V

VOUT2 = 3.33V

SKIPSEL = VREG5 or VREG3

1895 2105 2315

999 1110 1221

1227 1403 1579

ns

647 740 833

895 1052 1209

475 555 635

200 300 400 ns

20 28 -- kHz

Soft-Start Time

Current Sense

Current Limit Threshold

(Default)

ENTRIPx Source Current

ENTRIPx Current

Temperature Coefficient

ENTRIPx Adjustment

Range

tSSx

Zero to Full Limit from ENTRIPx Enable

VENTRIPx = VREG5, GND−PHASEx

IENTRIPx VENTRIPx = 0.9V

TC IENTRIP x

VENTRIPx = IENTRIPx x RENTRIPx

--

2

--

ms

180 200 220 mV

9.4 10 10.6 μA

-- 1600 -- PPM/°C

0.5 --

2

V

DS8223A/B-04 April 2011

To be continued

www.richtek.com

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