Rainbow-electronics MAX5081 Manual de usuario descargar pdf (Pagina 3)

MAX5080/MAX5081

1A, 40V, MAXPower Step-Down

DC-DC Converters

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= V

ON/OFF

= 12V, V

REG

= V

DVREG

, V

SYNC

= PGND = SGND, T

= T

= -40°C to +125°C, unless otherwise noted. Typical values

are at T

= + 25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

FB Offset Voltage I

COMP

= -500µA to +500µA -5 +5 mV

OSCILLATOR

Frequency f

SYNC

= 0V 225 250 275 kHz

SYNC

= 0V, V

= 4.5V, MAX5080 87

SYNC

= 0V, V

= 7.5V, MAX5081 87

Maximum Duty Cycle D

MAX

SYNC

= 0V, V

≤ 40V 87

SYNC High-Level Voltage 2.2 V

SYNC Low-Level Voltage 0.8 V

SYNC Frequency Range f

SYNC

150 350 kHz

PWM Modulator Gain f

SYNC

= 150kHz to 350kHz 10 V/V

Ramp Level Shift (Valley) 0.3 V

POWER SWITCH

Switch On-Resistance V

BST

- V

= 6V 0.3 0.6 Ω

Switch Gate Charge V

BST

- V

= 6V 6 nC

Switch Leakage Current V

= 40V, V

= V

BST

= 0V 10 µA

BST Leakage Current V

BST

= V

= 40V 10 µA

CHARGE PUMP

C- Output Voltage Low MAX5080 only, sinking 10mA 0.1 V

C- Output Voltage High

MAX5080 only, relative to DVREG, sourcing

10mA

0.1 V

DVREG to C+ On-Resistance MAX5080 only, sourcing 10mA 10 Ω

LX to PGND On-Resistance Sinking 10mA 12 Ω

CURRENT-LIMIT COMPARATOR

Pulse-Skip Threshold I

PFM

100 200 300 mA

Cycle-by-Cycle Current Limit I

ILIM

1.4 2 2.6 A

Number of Consecutive ILIM

Events to Hiccup

Hiccup Timeout 512

Clock

periods

INTERNAL VOLTAGE REGULATOR

MAX5080 4.75 5 5.25

Output Voltage V

REG

MAX5081 7.6 8 8.4

= 5.5V to 40V, MAX5080 1

Line Regulation

= 9.0V to 40V, MAX5081 1

mV/V

Load Regulation I

REG

= 0 to 20mA 0.25 V

= 4.5V, I

REG

= 20mA, MAX5080 0.5

Dropout Voltage

= 7.5V, I

REG

= 20mA, MAX5081 0.5

1 2 3 4 5 6 7 8 ... 18 19

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics MAX5081 Manual de usuario Pagina 3

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics MAX5081