Rainbow-electronics MAX1801 Manual do Utilizador descarregar pdf (Página 3)

MAX1801

Digital Camera Step-Up Slave

DC-DC Controller

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V

= +3.3V, V

DCON

= +1.25V, V

REF

= +1.25V, T

= -40°C to +85°C, unless otherwise noted.) (Note 1)

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

= +3.3V, V

DCON

= +1.25V, V

REF

= +1.25V, T

= 0°C to +85°C, unless otherwise noted. Typical values are at

= +25°C.) (Note 1)

PARAMETER CONDITIONS MIN TYP MAX UNITS

DRIVER

DL Driver Resistance 2.5 5 Ω

DL Drive Current 0.5 A

SOFT-START

Soft-Start Interval 1024

OS C

cycl es

SHORT-CIRCUIT PROTECTION

Fault Interval 1024

OS C

cycl es

PARAMETER CONDITIONS MIN TYP MAX UNITS

GENERAL

Supply Voltage Operating Range 2.7 5.5 V

Undervoltage Lockout Threshold V

rising 2.15 2.55 V

REF Input Range 1.19 1.31 V

REF Undervoltage Lockout Threshold V

REF

rising 0.85 1.15 V

Shutdown Supply Current V

= 5.5V, V

DCON

= 0, V

REF

= 0 1 µA

Sleep-Mode Supply Current V

= 3.3V, V

DCON

= 0, V

REF

= 1.25V 10 µA

Quiescent Supply Current V

OSC

= 0, V

= 0 300 µA

OSCILLATOR INPUT

OSC Input Leakage Current V

OSC

= 1.5V 1 µA

Oscillator Frequency Range 100 1000 kHz

OSC Clock Low Trip Level 0.20 0.30 V

1.00 1.10

OSC Clock High Trip Level

DCON

= 0.625V 0.575 0.675

Maximum Duty Cycle Adjustment Range

(Note 2)

OSC

= 100kHz 40 90 %

INPUTS/OUTPUTS

DCON Input Leakage Current V

DCON

= 5.5V 100 nA

DCON Input Sleep-Mode Threshold I

≤ 10µA 0.35 0.45 V

DCON

= 0 1.1

DCON

= V

REF

10REF Input Current

DCON

= V

REF

, during soft-start 30

µA

1 2 3 4 5 6 7 8 ... 15 16

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