MAX1817 datasheet(2/12 Pages) MAXIM

2 / 12 page

Compact, High-Efficiency, Dual-Output

Step-Up DC-DC Converter

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VON = VONLCD =VOUT = +3.3V, FB = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

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.

OUT to GND .............................................................-0.3V to +6V

ON, ONLCD, FB, FBLCD, LX to GND ......-0.3V to (VOUT + 0.3V)

LXLCD to GND .......................................................-0.3V to +30V

AGND to GND .......................................................-0.3V to +0.3V

Continuous Power Dissipation (TA = +70°C)

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

LXLCD, LX Maximum Current ........................................0.5ARMS

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

GENERAL

Input Voltage Range

1.5

5.5

RLOAD = 35

Ω

1.5

Startup Voltage

RLOAD =

∞, VFB = 1.35V

1.2

1.55

Quiescent Current from OUT

(Main Only)

VFB = VFBLCD = 1.35V,

VONLCD = 0

510

µA

Quiescent Current from OUT

VFB = VFBLCD = 1.35V

µA

Shutdown Quiescent Current

VON = VONLCD = 0

0.1

µA

MAIN OUTPUT

VOUT rising, VFB = 1.35V

2.2

2.4

OUT Undervoltage Lockout

VOUT falling, VFB = 1.35V

1.95

2.15

Fixed-Mode Output Voltage

VFB

≤ 45mV

3.14

3.3

3.47

Adjustable-Mode FB Regulation

Voltage

1.20

1.25

1.30

FB Input Bias Current

VFB = 1.35V

FB Dual Mode

TM Threshold

105

Output Voltage Adjustment

Range

2.5

5.5

Maximum LX On-Time

VFB = 0.5V

2.4

7.5

µs

Zero Crossing Comparator

Threshold (VLX - VOUT)

020

Zero Crossing Comparator

Backup Timer

VFB = +0.5V

µs

Line Regulation

IOUT = 100mA,

VIN = +2V to +3V

1.6

Load Regulation

VIN = +2.5V,

ILOAD = 10mA to 100mA

1.6

LX On-Resistance

VOUT = 3.3V, ILX = 100mA

0.35

0.65

Ω

LX Current Limit

0.5

0.75

1.05

Dual Mode is a trademark of Maxim Integrated Products.

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