MAX17014ETM+ datasheet(7/34 Pages) MAXIM

Part #	MAX17014ETM+

Description	Low-Cost Multiple-Output Power Supply for LCD TVs

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Manufacturer	MAXIM [Maxim Integrated Products]

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7 / 34 page

Low-Cost Multiple-Output

Power Supply for LCD TVs

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7

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, VIN = IN2 = 12V, AVDD = OVIN = SUP = 15V, TA = -40°C to +85°C. Typical values are at TA = +25°C, unless oth-

erwise noted.) (Note 4)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

VIN, IN2 Input Voltage Range

8.0

16.5

V

FSEL = VIN

1020

1380

SMPS Operating Frequency

FSEL = GND

510

690

kHz

VIN Undervoltage Lockout Threshold

VIN rising edge, 100mV typical hysteresis

5.75

7.25

V

VL REGULATOR

VL Output Voltage

IVL = 25mA, VFB1 = VFB2 = VFBP = 1.1V,

VFBN = 0.4V (all regulators switching)

4.9

5.1

V

VL Undervoltage Lockout Threshold

VL rising edge, 100mV typical hysteresis

3.5

4.3

V

REFERENCE

REF Output Voltage

No external load

1.235

1.265

V

REF Load Regulation

0 < ILOAD < 50μA

10

mV

REF Undervoltage Lockout Threshold

Rising edge; 20mV typical hysteresis

1.2

V

STEP-DOWN REGULATOR

OUT Voltage in Fixed Mode

FB2 = GND, no load (Note 2)

3.25

3.35

V

FB2 Voltage in Adjustable Mode

VOUT = 2.5V, no load (Note 2)

1.23

1.27

V

FB2 Adjustable-Mode

Threshold Voltage

Dual-mode comparator

0.10

0.20

V

Output Voltage Adjust Range

Step-down output

1.5

5.0

V

LX2-to-IN2 nMOS Switch

On-Resistance

240

m

LX2-to-CPGND nMOS Switch

On-Resistance

6

23

BST-to-VL pMOS Switch

On-Resistance

7

20

LX2 Positive Current Limit

2.50

3.50

A

Maximum Duty Factor

70

90

%

STEP-UP REGULATOR

Output Voltage Range

VVIN

20

V

Oscillator Maximum Duty Cycle

69

81

%

FB1 Regulation Voltage

FB1 = COMP, CCOMP = 1nF

1.23

1.27

V

LX1 Current Limit

VFB1 = 1.1V, duty cycle = 25%

3.2

4.2

A

Current-Sense Transresistance

0.16

0.30

V/A

LX1 On-Resistance

220

m

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