MAX1927 Ver la hoja de datos (PDF) - Maxim Integrated

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componentes Descripción

Fabricante

MAX1927

Low-Output-Voltage, 800mA, PWM Step-Down DC-DC Converters

Maxim Integrated 

Low-Output-Voltage, 800mA, PWM Step-Down

DC-DC Converters

ELECTRICAL CHARACTERISTICS (continued)

(VBATT = 3.6V, SHDN = BATT, CREF = 0.1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

FB Input Current

Reference Voltage Accuracy

Reference-Supply Rejection

PWM CONTROLLER

P-Channel On-Resistance

N-Channel On-Resistance

P-Channel Current-Limit Threshold

P-Channel Pulse-Skipping Current Threshold

LX Leakage Current

Maximum Duty Cycle

Minimum Duty Cycle

Internal Oscillator Frequency

POK COMPARATOR

BATT Operating Voltage Range

Output Low Voltage

Output High Leakage Current

POK Threshold

Output Valid to POK Release Delay

LOGIC INPUTS (SHDN, PWM)

Logic Input High

Logic Input Low

Logic Input Current

MAX1927R

CONDITIONS

2.6V < VBATT < 5.5V

VBATT = 3.6V

VBATT = 2.6V

VBATT = 3.6V

VBATT = 2.6V

VBATT = 5.5V, LX = GND or BATT

PWM = GND

IPOK = 0.1 mA

VFB = 0.5V, IPOK = 1mA

VPOK = 5.5V

MAX1927R

MAX1928-15

MAX1928-18

MAX1928-25

POK transitions to high impedance 20ms

after VFB > VPOK

2.6V < VBATT < 5.5 V

2.6V < VBATT < 5.5 V

VBATT = 5.5V

MIN

MAX UNITS

150

nA

1.22

1.269

V

2

mV

0.4

Ω

0.5

0.30

Ω

0.35

1.1

0.10

1.6

A

0.10

0.16

A

-20

+20

µA

100

%

0

%

0.8

1.2

MHz

1

0.650

1.305

1.566

2.175

15

5.5

V

0.1

V

1

µA

0.700

1.395

1.674

V

2.325

25

ms

1.6

V

0.6

V

1

µA

4 _______________________________________________________________________________________

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