MAX8720 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX8720

Dynamically Adjustable 6-Bit VID Step-Down Controller

Maxim Integrated 

Dynamically Adjustable 6-Bit VID

Step-Down Controller

ABSOLUTE MAXIMUM RATINGS (Note 1)

VCC to AGND............................................................-0.3V to +6V

VDD to PGND............................................................-0.3V to +6V

AGND to PGND .....................................................-0.3V to +0.3V

V+ to PGND............................................................-0.3V to +30V

SHDN to AGND ......................................................-0.3V to +16V

D0–D5, PGOOD, SUS, SKIP to AGND .....................-0.3V to +6V

FB, FBS, GNDS to AGND ...........................-0.3V to (VCC + 0.3V)

CC, ILIM, REF, TIME to AGND ...................-0.3V to (VCC + 0.3V)

S0, S1, TON to AGND ................................-0.3V to (VCC + 0.3V)

BST to PGND..........................................................-0.3V to +36V

LX to BST..................................................................-6V to +0.3V

DH to LX .....................................................-0.3V to (BST + 0.3V)

DL to PGND................................................-0.3V to (VDD + 0.3V)

REF Short Circuit to AGND.........................................Continuous

Continuous Power Dissipation (TA = +70°C)

28-Pin QSOP (derate 10.8mW/°C above +70°C)........860mW

36-Pin TQFN (derate 26.3mW/°C above +70°C) .....2105mW

Operating Temperature

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

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

Storage Temperature Range .............................-65°C to +165°C

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

Note 1: For the MAX8720EEI, AGND and PGND refer to a single pin designated GND.

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.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V+ = 15V, SHDN = SKIP = VDD = VCC = +5V, VOUT = 1.25V, TA = 0°C to +85°C, unless otherwise noted. Typical

values are at TA = +25°C.)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

PWM CONTROLLER

Input Voltage Range

Battery voltage, V+

VCC, VDD

2

28

V

4.5

5.5

DC Output Voltage Accuracy

DAC codes from

0.9V to 1.85V

-1

V+ = 4.5V to 28V,

includes load

regulation error

DAC codes from

0.45V to 0.875V

-10

DAC codes from

0.275V to 0.425V

-18

+1

%

+10

mV

+18

Line Regulation Error

Remote-Sense Voltage Error

FBS Input Bias Current

GNDS Input Bias Current

FB Input Resistance

TIME Frequency Accuracy

VCC = 4.5V to 5.5V, V+ = 4.5V to 28V

5

mV

FB to FBS or AGND to GNDS = 0 to 25mV

3

mV

FB, FBS

-0.2

+0.2

µA

GNDS

-1

+1

µA

115 180 265

kΩ

150kHz, RTIME = 120kΩ

818kHz, RTIME = 22kΩ

38kHz, RTIME = 470kΩ

-8

+8

-12

+12

%

-12

+12

V+ = 5V, FB = 1.25V, TON = GND

(1000kHz)

230 260 290

On-Time (Note 2)

tON

V+ = 12V,

FB = 1.25V

TON = REF

(550kHz)

TON = open

(300kHz)

165 190 215

ns

320 355 390

TON = VCC

(200kHz)

465 515 565

2 _______________________________________________________________________________________

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