MAX1534 datasheet(2/16 Pages) MAXIM

部件名	MAX1534

功能描述	High-Efficiency, Triple-Output, Keep-Alive Power Supply for Notebook Computers

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制造商	MAXIM [Maxim Integrated Products]

网页	https://www.maximintegrated.com/en.html

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2 / 16 page

High-Efficiency, Triple-Output, Keep-Alive

Power Supply for Notebook Computers

2

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ABSOLUTE MAXIMUM RATINGS

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.

IN, ILIM, PRESET, SHDN to GND...........................-0.3V to +25V

FB1, FB2, FB3, LDOIN, BP to GND..........................-0.3V to +6V

OUT1, OUT2, POK to GND ...................-0.3V to (VLDOIN + 0.3V)

LX to GND.......................................................-2V to (VIN + 0.3V)

OUT1, OUT2 Short Circuit to GND.............................Continuous

Peak IN Current........................................................................2A

Maximum IN DC Current...................................................500mA

Continuous Power Dissipation (TA = +70°C)

16-Pin Thin QFN (derate 16.9mW/°C

above +70°C)............................................................1349mW

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

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, VIN = 12V, ILIM = GND, PRESET = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA =

+25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

VIN

4.5

24

V

Input Supply Current

IIN

No load, FB3 = 5.2V, LDOIN = GND

15

30

µA

Input Supply Current in

Dropout

IIN(DROP)

No load, FB3 = VIN = 4.5V, LDOIN = GND

60

110

µA

Shutdown Supply Current

SHDN = GND

3.5

7

µA

VIN rising

3.6

4.0

4.4

Input UVLO Threshold

VUVLO

VIN falling

3.5

3.9

4.3

V

BUCK REGULATOR

TA = +25°C to +85°C

4.92

5.00

5.08

FB3 Voltage Accuracy (Preset

Mode) (Note 1)

PRESET = GND

TA = 0°C to +85°C

4.90

5.00

5.10

V

TA = +25°C to +85°C

0.985

1.00

1.015

FB3 Set Voltage (Adjustable

Mode) (Note 1)

VFB3

PRESET = IN

TA = 0°C to +85°C

0.98

1.00

1.02

V

FB3 Bias Current

IFB3

VFB3 = 5.5V

3.5

6.25

µA

LX Switch Minimum Off-Time

tOFF(MIN)

0.22

0.42

0.62

µs

LX Switch Minimum On-Time

tON(MIN)

0.50

µs

LX Switch Maximum On-Time

tON(MAX)

910

11

µs

VIN = 6V

0.5

1.0

LX Switch On-Resistance

RLX

VIN = 4.5V

0.6

1.2

Ω

ILIM = IN

800

1000

1200

LX Current Limit

ILX(PEAK)

ILIM = GND

425

500

575

mA

LX Zero-Crossing Threshold

-75

+75

mV

LX Zero-Crossing Timeout

LX does not rise above threshold

30

µs

TA = +25°C1

LX Switch Leakage Current

VIN = 24V, not

switching

TA = 0°C to +85°C10

µA

Dropout Voltage

VOUT3(DROPOUT) ILX(DC) = 500mA

250

mV

Line Regulation

VIN = 8V to 24V, ILX(DC) = 200mA

0.1

%/V

Load Regulation

ILX(DC) = 80mA to 400mA

0.9

%

LINEAR REGULATORS

LDOIN Input Voltage

VLDOIN

2.5

5.5

V

LDOIN Undervoltage Lockout

VUVLO(LDO)

VLDOIN rising, hysteresis = 40mV typ

2.15

2.4

V

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