Diodes AP3431 Manuel d'utilisateur télécharger pdf (Page 5)

Data Sheet

1.0MHz, 2.0A, Synchronous Step Down DC-DC Converter AP3431

Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

Electrical Characteristics

=5V, V

OUT

=1.2V, V

=0.8V, L=2.2µH, C

=10µF, C

OUT

=22µF, T

=25°C, unless otherwise

specified.

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage Range V

2.7 5.5 V

Shutdown Current I

OFF

=0V 4 µA

Active Current I

= 0.95V 460 µA

Regulated1Feedback

Voltage

For Adjustable Output Voltage 0.784 0.8 0.816 V

Regulated Output

Voltage Accuracy

∆V

OUT

=2.7V to 5.5V,

OUT

=0 to 2.0A

-3 3 %

Peak Inductor

Current

2.9 A

Oscillator Frequency f

OSC

= 2.7V to 5.5V 1.0 MHz

PMOSFET R

ON(P)

= 5V 120 mΩ

NMOSFET R

ON(N)

= 5V 120 mΩ

EN High-level Input

Voltage

EN_H

1.5 V

EN Low-level Input

Voltage

EN_L

0.4 V

EN Input Current I

2 µA

Soft-start Time t

450 µs

Maximum Duty

Cycle

MAX

90 %

Rising 2.4 V

Falling 2.3 V

Under Voltage Lock

Out Threshold

Hysteresis 0.1 V

Thermal Shutdown T

Hysteresis=30°C 160 °C

1 2 3 4 5 6 7 8 9 10 ... 18 19

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Diodes AP3431 Manuel d'utilisateur Page 5

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