Diodes AP3407/A Manuel d'utilisateur télécharger pdf (Page 5)

Data Sheet

1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3407/A

Dec. 2011 Rev. 1. 3 BCD Semiconductor Manufacturing Limited

Recommended Operating Conditions

Parameter Symbol Min Max Unit

Input Voltage V

2.5 5.5 V

Maximum Output Current I

OUT (MAX)

1.2 A

Operating Ambient Temperature T

-40 85 ºC

Electrical Characteristics

PVDD

=3.3V, T

=25℃, unless otherwise specified.

Parameters Symbol Conditions Min Typ Max Unit

Input Voltage V

2.5 5.5 V

Quiescent Current I

=0.65V 62 100

µA

Shutdown Supply Current I

STBY

=GND 0.1 1

µA

Reference Voltage V

REF

For Adjustable Output

Voltage

0.588 0.6 0.612 V

Feedback Bias Current I

-0.1 0.1

µA

Output Voltage Accuracy

∆V

OUT

-2 2 %

PMOSFET R

DS(ON)_ P

= 200mA

0.28

Ω

NMOSFET R

DS(ON) _N

= -200mA

0.25

Ω

Switch Current Limit I

LIM

=0.55V 1.5 2.0 A

1.5

EN Pin Threshold

0.4

UVLO Threshold V

UVLO

Rising 2.3

UVLO Hysteresis V

HYS

0.2

Oscillator Frequency f

OSC

1.12 1.40 1.68 MHz

Max. Duty Cycle D

MAX

=0V 100

Min. Duty Cycle D

MIN

=6.5V 0

N-MOS SW Leakage

Current

=3.3V, V

=3.3V 0.1

µA

Soft-start Time t 1 ms

Thermal Shutdown T

OTSD

160 ºC

Thermal Shutdown

Hysteresis

HYS

20 ºC

1 2 3 4 5 6 7 8 9 10 11

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Diodes AP3407/A Manuel d'utilisateur Page 5

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