Rainbow-electronics MAX8815A Manual do Utilizador descarregar pdf (Página 3)

MAX8815A

1A, 97% Efficiency, 30µA Quiescent Current

Step-Up Converter with True Shutdown

_______________________________________________________________________________________ 3

PARAMETER CONDITIONS MIN TYP MAX UNITS

DC-DC SWITCHES

p-Channel On-Resistance 0.14 0.25 Ω

n-Channel On-Resistance 0.1 0.17 Ω

n-Channel Current Limit 2.20 2.5 2.75 A

p-Channel Turn-Off Current 10 mA

= +25°C 0.1 2

OUT Leakage Current

= V

= 0V, V

OUTS

POUT

= V

BATT

= 5.5V

= +85°C 0.2

µA

= +25°C 0.1 2

LX Leakage Current

= 0V or 5.5V, V

OUTS

POUT

= V

BATT

= 5.5V,

= 0V

= +85°C 0.2

µA

Soft-Start Interval Load dependent 6 ms

Overload Protection Fault Delay 16 ms

Startup into a Short Circuit 6ms

LOGIC INPUTS

ON Input Low Level V

OUTS

= V

POUT

= 0V and 1.5V < V

BATT

< 5.5V 0.5 V

ON Input High Level

OUTS

= V

POUT

= 0V and 1.5V < V

BATT

< 5.5V, V

is the

highter of V

POUT

and V

BATT

0.2V

(1.3V

max

)

SKIPB Input Low Level 3.3V < V

POUT

< V

OUT

< 5.5V 0.5 V

SKIPB Input High Level 3.3V < V

POUT

< V

OUT

< 5.5V 1.6 V

= +25°C 0.01 1

ON, SKIPB Input Leakage

Current

OUTS

= V

POUT

= V

BATT

5.5V

= +85°C 0.02

µA

Thermal Shutdown +167 °C

ELECTRICAL CHARACTERISTICS (continued)

OUTS

= V

POUT

= 5V, V

= V

BATT

= 3.6V, V

SKIPB

= GND, T

= -40°C to +85°C, typical values are at T

= +25°C, unless otherwise

noted. Limits are 100% production tested at T

= +25°C. Limits over the operating temperature range are guaranteed by design and

characterization.)

Note 3: Guaranteed by design. Not production tested.

Note 4: The idle-mode current threshold is the transition point between fixed-frequency PWM operation and idle-mode operation. The

specification is given in terms of output load current for inductor values shown in the typical application circuits (Figure 1). The

idle-mode transition varies with input-to-output voltage ratio.

1 2 3 4 5 6 7 8 ... 11 12

MAX8815A 1

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