MAX8649(2009) Ver la hoja de datos (PDF) - Maxim Integrated

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Fabricante

MAX8649
(Rev.:2009)

1.8A Step-Down Regulator with Remote Sense in 2mm x 2mm WLP

Maxim Integrated 

1.8A Step-Down Regulator with Differential

Remote Sense in 2mm x 2mm WLP

ELECTRICAL CHARACTERISTICS (continued)

(VIN1 = VIN2 = 3.6V, VAGND = VPGND = 0V, VDD = 1.8V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA =

+25°C.) (Note 2)

PARAMETER

CONDITIONS

No load, VIN_ = 2.5V to 5.5V, VOUT = 1.27V

OPERATION_MODE_ = 1

MIN TYP MAX UNITS

-0.5

+0.5

OUT Voltage Accuracy

IOUT = no load, VIN_ = 2.5V to 5.5V, VOUT = 0.75V,

OPERATION_MODE_ = 1

-1.0

+1.0

%

Load Regulation

RAMP Timer

Peak Current Limit

(p-Channel MOSFET)

Valley Current Limit

(n-Channel MOSFET)

Negative Current Limit

(n-Channel MOSFET)

n-Channel Zero-Crossing

Threshold

LX pFET On-Resistance

LX nFET On-Resistance

LX Leakage

Operating Frequency

IOUT = no load, VIN_ = 2.5V to 5.5V, VOUT = 1.38V,

OPERATION_MODE_ = 1

RL is the resistance from LX to SNS+ (output)

RAMP[2:0] = 000

RAMP[2:0] = 001

RAMP[2:0] = 010

RAMP[2:0] = 011

RAMP[2:0] = 100

RAMP[2:0] = 101

RAMP[2:0] = 110

RAMP[2:0] = 111

PWM and hysteretic mode

Hysteretic mode

PWM mode

IN2 to LX, ILX = -200mA

OPERATION_MODE = 0

LX to PGND, ILX = 200mA

VLX = 5.5V or 0V

Internal oscillator, PWM

TA = +25°C

TA = +85°C

Internal oscillator, power-save mode before entering

PWM mode

13MHz option

19.2MHz option

26MHz option

-0.5

+0.5

RL/25

32.50

16.25

8.125

4.063

2.031

1.016

0.508

0.254

V/A

mV/µs

2.3

2.8

3.2

A

1.8

2.4

3.0

A

2.0

2.5

3.0

A

50

0.16

0.08 0.16

0.06 0.12

-1

0.03

+1

0.05

2.82 3.25 3.56

2.43 3.25 4.06

fSYNC/4

fSYNC/6

fSYNC/8

mA

Ω

Ω

µA

MHz

4 _______________________________________________________________________________________

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