Rainbow-electronics MAX1585 Manual do Utilizador descarregar pdf (Página 3)

MAX1584/MAX1585

5-Channel Slim DSC Power Supplies

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

PVSU

= V

PVSD

= V

INDL2

= 3.6V, T

= 0°C to +85°C, unless otherwise noted.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Step-Up Voltage Adjust Range 3.0 5.5 V

Start Delay of ONSD, ON1, ON2,

ON3 after SU in Regulation

1024

OSC

cycles

FBSU Regulation Voltage 1.231 1.25 1.269 V

FBSU to CCSU

Transconductance

FBSU = CCSU 80 135 185 µS

FBSU Input Leakage Current FBSU = 1.25V -100 +1 +100 nA

Idle Mode

Trip Level (Note 6) 150 mA

Current-Sense Amplifier

Transresistance

0.275 V/A

Step-Up Maximum Duty Cycle FBSU = 1V 80 85 90 %

PVSU Leakage Current V

= 0V, PVSU = 5.5V 0.1 5 µA

LXSU Leakage Current V

LXSU

= V

OUT

= 5.5V 0.1 5 µA

N channel 95 150

Switch On-Resistance

P channel 150 250

mΩ

N-Channel Current Limit 2.4 2.8 3.2 A

P-Channel Turn-Off Current 20 mA

Startup Current Limit PVSU = 1.8V (Note 5) 450 mA

Startup t

OFF

PVSU = 1.8V 700 ns

Startup Frequency PVSU = 1.8V 200 kHz

STEP-DOWN DC-DC CONVERTER

Step-Down Output Voltage

Adjust Range

PVSD must be greater than output (Note 7) 1.25 5.00 V

FBSD Regulation Voltage 1.231 1.25 1.269 V

FBSD to CCSD

Transconductance

FBSD = CCSD 80 135 185 µS

FBSD Input Leakage Current FBSD = 1.25V -100 +0.1 +100 nA

Idle Mode Trip Level (Note 6) 100 mA

Current-Sense Amplifier

Transresistance

0.5 V/A

LXSD Leakage Current V

LXSD

= 0 to 3.6V, PVSU = 3.6V 0.1 5 µA

N channel 95 150

Switch On-Resistance

P channel 150 250

mΩ

P-Channel Current Limit 0.65 0.8 0.95 A

N-Channel Turn-Off Current 20 mA

Soft-Start Interval 2048

OSC

cycles

SDOK Output Low Voltage 0.1mA into SDOK 0.01 0.1 V

SDOK Leakage Current ONSU = GND 0.01 1 µA

Idle Mode is a trademark of Maxim Integrated Products, Inc.

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MAX1584/MAX1585 1
Package Information 29

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