EC9219 datasheet(3/14 Pages) E-CMOS

3 / 14 page

TFT- LCD DC-DC Converters with Operational Amplifiers

EC9219

P 3 / 14

2009/09/29

Absolute Maximum rating

( TA = 25℃ )

VIN to SGND......................................................-0.3V to +6V

Comp, FB, SD , Freq to SGND ........................-0.3V to +6V

PGND to SGND .......................................................... ±0.3V

LX to PGND....................................................-0.3V to +18V

SUP,IN+,IN- to SGND .....................................-0.3V to +18V

Out Maximum Continuous Output Current ......±150mA

RMS LX Pin Current......................................................1.6A

Operating Ambient Temperature ......... -40℃ to +85℃

Operating Junction Temperature........................ +125℃

Storage temperature ......................... -65℃ to +150℃

Lead Temperature ............................................+260℃

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress

ratings only, and 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 affect device reliability.

Electrical Specifications

VIN = 3V, VSUP = 10V ,FSEL = GND, TA =25℃ unless otherwise specified

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNIT

VIN Supply Range

VIN

2.6

5.5

VIN Under voltage-Lockout

Threshold

VUVLO

VIN rising ,typical hysteresis = 40mV

2.25

2.38

2.52

SD = VIN,VFB=1.3, not switching

0.4

Quiescent Current

IIN

SD = VIN,VFB=COMP, switching

Shutdown Supply Current

IIN

SD = SGND include OP.

0.1

Input Low Level

VIL

SD , Freq ;VIN=３V to 5.5V

0.3VIN

Input High Level

VIH

SD , Freq ;VIN=３V to 5.5V

0.7VIN

Hysteresis

SD , Freq ;VIN=３V to 5.5V

0.1VIN

Freq Input Current

Freq =VIN

SD Input Current

SD =VIN

Temperature rising

130

Thermal Shutdown

Hysteresis

Main STEP-UP REGULATOR

Output Voltage Range

Vmain

VIN

Freq=GND

500

640

750

kHz

Frequency

fosc

Freq=

VIN,

1000

1200

1500

kHz

Freq=GND

Maximum Duty Cycle

Freq=

VIN,

FB Regulation Voltage

VFB

load=50mA

1.222

1.24

1.258

FB Line Regulation

VIN=2.6V to 5.5V

0.5

FB Input Bias Current

VFB=1.4

Voltage Gain

FB to Comp

1000

V/V

Swicth On-Resistance

Rds(on)

160

250

mΩ

LX Leakage Current

ILX

VLX=18V

1.8

LX Current Limit

Current-Sense

Tran conductance

Rcs

0.047

V/A

OPEATIONAL AMPLIFERS

SUP Supply Range

Vsup

4.5

SUP Supply Current

Isup

Buffer configuration ,no load

OUT=4V,Vsup=8V

2.8

Input Offset Voltage

VOS

OUT= Vsup/2

Input Bias Current

IBIAS

OUT= Vsup/2

Input Common-Mode Range

VCM

Vsup

Common-Mode Rejection Ratio

CMRR

Open-Loop Gain

100

Output Voltage Swing ,High

VOH

IOUT=5mA

Vsup-150

Vsup-80

Output Voltage Swing ,Low

VOL

IOUT=-5mA

150

Power-Supply Rejection Ratio

PSRR

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