Rainbow-electronics MAX1585 Manual do Utilizador descarregar pdf (Página 5)

MAX1584/MAX1585

5-Channel Slim DSC Power Supplies

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PARAMETER CONDITIONS MIN MAX UNITS

GENERAL

Input Voltage Range (Note 2) 0.7 5.5 V

Shutdown Supply Current

into PVSU

PVSU = 3.6V 5 µA

Supply Current into PV with

Step-Up Enabled

ONSU = 3.6V, FBSU = 1.5V

(does not include switching losses)

450 µA

Supply Current into PV with

Step-Up and Step-Down Enabled

ONSU = ONSD = 3.6V, FBSU = 1.5V, FBSD = 1.5V

(does not include switching losses)

700 µA

Total Supply Current from PV and

PVSU with Step-Up and One AUX

Enabled

ONSU = ON1 = 3.6V, FBSU = 1.5V, FB2 = 1.5V

(does not include switching losses)

650 µA

REFERENCE

Reference Output Voltage I

REF

= 20µA 1.225 1.275 V

Reference Load Regulation 10µA < I

REF

< 200µA 10 mV

Reference Line Regulation 2.7V < PVSU < 5.5V 5 mV

OSCILLATOR

OSC Discharge Trip Level Rising edge 1.225 1.275 V

OSC Discharge Resistance OSC = 1.5V, I

OSC

= 3mA 80 Ω

STEP-UP DC-DC CONVERTER

Step-Up Startup-to-Normal

Operating Threshold

Rising edge or falling edge (Note 4) 2.30 2.65 V

Step-Up Voltage Adjust Range 3.0 5.5 V

FBSU Regulation Voltage 1.225 1.275 V

FBSU to CCSU

Transconductance

FBSU = CCSU 80 185 µS

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

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

PVSU Leakage Current V

= 0V, PVSU = 5.5V 5 µA

LXSU Leakage Current V

LXSU

= V

OUT

= 5.5V 5 µA

N channel 150

Switch On-Resistance

P channel 250

mΩ

N-Channel Current Limit 2.4 3.2 A

STEP-DOWN DC-DC CONVERTER

Step-Down Output Voltage Adjust

Range

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

ELECTRICAL CHARACTERISTICS

PVSU

= V

PVSD

= V

INDL2

= 3.6V, T

= -40°C to +85°C, unless otherwise noted.) (Note 8)

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MAX1584/MAX1585 1
Package Information 29

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