Rainbow-electronics MAX15020 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX15020

2A, 40V Step-Down DC-DC Converter with

Dynamic Output-Voltage Programming

_______________________________________________________________________________________ 3

Note 1: Limits are 100% production tested at T

= T

= +25°C. Limits at -40°C and +125°C are guaranteed by design.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SOFT-START/REFIN/REFOUT/FB

Soft-Start Current I

81526µA

REFOUT Output Voltage 0.97 0.98 1.01 V

REFIN Input Range 0 3.6 V

REFIN = REFOUT 0.97 0.98 1.01 V

FB Accuracy

FB = COMP, V

REFIN

= 0.2V to 3.6V

REFIN

- 5mV

REFIN

+ 5mV

FB Input Current V

= 0.2V, V

= 0V -250 +250 nA

Open-Loop Gain 80 dB

Unity-Gain Bandwidth 1.8 MHz

SYNC

= 100kHz, V

= 7.5V 9.4

PWM Modulator Gain (V

RAMP

)

SYNC

= 500kHz, V

= 40V 8.9

V/V

CURRENT-LIMIT COMPARATOR

Cycle-by-Cycle Switch Current

Limit

ILIM

2.5 3.5 4.5 A

Number of ILIM Events to Hiccup 4

—

Hiccup Timeout 512

Clock

periods

POWER SWITCH

Switch On-Resistance V

BST

- V

= 6V 0.18 0.35 Ω

BST Leakage Current V

BST

= V

= 40V 10 µA

Switch Leakage Current V

= 40V, V

= V

BST

= 0V 10 µA

Switch Gate Charge V

BST

- V

= 6V 10 nC

THERMAL SHUTDOWN

Thermal Shutdown Temperature T

SHDN

+160 °C

Thermal Shutdown Hysteresis 20 °C

ELECTRICAL CHARACTERISTICS (continued)

= 36V, V

REG

= V

DVREG

, V

PGND

= V

GND

= V

= 0V, V

SYNC

= 0V, C

REFOUT

= 0.1µF, T

= T

= -40°C to +125°C, FSEL = REG,

unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

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MAX15020 1

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