MAX8739 Просмотр технического описания (PDF) - Maxim Integrated

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MAX8739

TFT, LCD, DC-DC Converter with Operational Amplifiers

Maxim Integrated 

MAX8739

TFT, LCD, DC-DC Converter with

Operational Amplifiers

Electrical Characteristics (continued)

(VIN = 2.5V, VSUP = 10V, VSRC = 28V, FREQ = CTL = IN, PGND = AGND = 0, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

FREQ Input-High Voltage

FREQ Pulldown Current

VIN = 1.8V to 2.4V

VIN = 2.4V to 5.5V

VFREQ = 1.0V

1.4

V

2.0

3.5

6.0

µA

FB Regulation Voltage

FB Fault-Trip Level

ISWITCH = 200mA

Falling edge

1.220

0.96

1.260

V

1.04

V

Duration to Trigger-Fault

Condition

FREQ = AGND

FREQ = IN

41

64

ms

47

65

FB Line Regulation

FB Input Bias Current

FB Transconductance

LX On-Resistance

LX Current Limit

Current-Sense Transresistance

VIN =1.8V to 5.5V

VFB = 1.3V

DICOMP = 5µA

ILX = 200mA

VFB = IV, duty cycle = 65%

-0.15

75

1.5

0.22

+0.15 %/V

200

nA

280

µS

400

mΩ

2.3

A

0.50

V/A

OPERATIONAL AMPLIFIERS

Input Offset Voltage

VCM = VSUP/2, TA = +25°C

12

mV

Input Common-Mode Voltage

Range

NEG1, POS1, NEG2, POS2

0

VSUP

V

Common-Mode Rejection Ratio

Output Voltage Swing High

0 ≤ VNEG_, VPOS_ ≤ VSUP

IOUT_ = 100µA

IOUT_ = 5mA

50

dB

VSUP -

15

mV

VSUP -

150

Output Voltage Swing Low

Short-Circuit Current

IOUT_ = -100µA

IOUT_ = -5mA

To VSUP/2

Source

Sink

15

mV

150

50

mA

50

Output Source-and-Sink Current Buffer configuration, VPOS_ = 4V, |DVOS| < 10mV

40

mA

Power-Supply Rejection Ratio

DC, 6V ≤ VSUP ≤ 13V, VPOS_, VNEG_ = VSUP/2

60

dB

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