Rainbow-electronics MAX1801 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX1801

Digital Camera Step-Up Slave

DC-DC Controller

4 _______________________________________________________________________________________

PARAMETER CONDITIONS MIN TYP MAX UNITS

ERROR AMPLIFIER

FB Regulation Voltage 1.238 1.263 V

FB to COMP Transconductance -5µA < I

COMP

< 5µA 70 160 µS

FB Input Leakage Current V

= 1.35V 100 nA

DRIVER

DL Driver Resistance 5 Ω

ELECTRICAL CHARACTERISTICS (continued)

(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)

Typical Operating Characteristics

(Circuit of Figure 1, T

= +25°C, unless otherwise noted.)

1 100010010

EFFICIENCY vs. LOAD CURRENT

100

MAX1801 toc01

LOAD CURRENT (mA)

EFFICIENCY (%)

BATT

= +1.5V

OUT

= +12V

OUT

= +7V

OUT

= +18V

1 100010010

EFFICIENCY vs. LOAD CURRENT

100

MAX1801 toc02

LOAD CURRENT (mA)

EFFICIENCY (%)

BATT

= +2.4V

OUT

= +12V

OUT

= +7V

OUT

= +18V

1 100010010

EFFICIENCY vs. LOAD CURRENT

100

MAX1801 toc03

LOAD CURRENT (mA)

EFFICIENCY (%)

BATT

= +3.6V

OUT

= +12V

OUT

= +18V

OUT

= +7V

Note 1: All devices are 100% tested at T

= +25°C. All limits over the temperature range are guaranteed by design.

Note 2: Oscillator signal is generated by the MAX1800 or MAX1802.

1 2 3 4 5 6 7 8 9 ... 15 16

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