MAX1685EEE datasheet(2/14 Pages) MAXIM

2 / 14 page

Low-Noise, 14V Input, 1A, PWM

Step-Down Converters

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = V SHDN = 6V, STBY = SYNC/PWM = CVL, VBOOT = VOUT, FB = AGND, circuit of Figure 1, 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.

AIN to AGND ............................................................-0.3 to +15V

IN to PGND ................................................-0.3V to (VAIN + 0.3V)

LX to PGND .................................................-0.5V to (VIN + 0.3V)

PGND to AGND ..................................................................±0.3V

SHDN to AGND .........................................-0.3V to (VAIN + 0.3V)

ILIM/SS, FB, CC, BOOT, REF to AGND ....-0.3V to (VCVL + 0.3V)

CVH to IN..................................................................-6V to +0.3V

CVL, STBY, SYNC/PWM to AGND............................-0.3V to +6V

Reference Current ..............................................................±1mA

CVL Current .......................................................-1mA to +10mA

LX Peak Current (Internally Limited) .....................................2.3A

Continuous Power Dissipation (TA = +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C)............667mW

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

VFB = VOUT, ILOAD = 0 to 1A

Low-power mode, STBY = low,

VBOOT = 3.3V (Note 2)

Normal mode, SYNC/PWM = low,

VBOOT = 3.3V (Note 2)

PWM mode,

SYNC/PWM = high,

VBOOT = 3.3V

(Note 2)

SYNC/PWM = high

Low-side switch, VIN = 2.7V, ILX = 200mA

High-side switch,

ILX = 1A

VFB = VOUT, ILOAD = 0 to 1A

VIN = 5V to 14V

BOOT = AGND (Note 1)

SYNC/PWM = low

VFB = 1.4V

CONDITIONS

0.14

0.27

Quiescent Power Consumption

0.9

130

Zero Crossing Threshold

-10

100

VFB

Feedback Voltage

1.238

1.251

1.264

2.7

Input Voltage Range

0.15

0.4

0.9

Current Limit, N-Channel

1.2

1.75

2.3

ILIM

Current Limit in PWM Mode

Ω

On-Resistance, N-Channel

0.24

0.5

0.01

Output Load Regulation

Output Current Capability

VREF

VIN

Output Adjust Range

-50

IFB

FB Input Current

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

FB = AGND, ILOAD = 0 to 1A

VOUT

Output Voltage (3.3V Mode)

3.296

3.333

3.368

VIN = 6V

VIN = 2.7V

Ω

0.34

0.8

On-Resistance, P-Channel

MAX1684

MAX1685

MAX1684

MAX1685

SYNC/PWM = low

285

380

475

Pulse-Skipping Current Threshold

STBY = low

285

380

475

ILIMLP

Current Limit in Low-Power

Mode

MAX1685EEE датащи(PDF) 2 Page - Maxim Integrated Products

MAX1685EEE датащи(HTML) 2 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14

датащи скачать

ссылки URL