Diodes AP5101 Manual de usuario descargar pdf (Pagina 5)

AP5101

1.5A Step-Down Converter with 1.4MHz Switching

Frequency

AP5101

Document number: DS32258 Rev. 1 - 2

5 of 15

www.diodes.com

July 2010

NEW PRODUCT

Electrical Characteristics (V

= 12V, T

= +25°C, unless otherwise noted)

Note: 5. Guaranteed by design

Symbol Parameter Test Conditions Min Typ. Max Unit

Feedback Voltage 4.75V ≤ V

≤ 22V 0.790 0.810 0.830 V

Feedback Current V

= 0.8V 0.1 µA

DS(ON)

Switch-On Resistance (Note 5) 0.35 Ω

Switch Leakage

= 0V, V

= 0V

10 µA

Current Limit (Note 5)

2.5 A

Current Sense Transconductance

Output Current to Comp Pin Voltage

1.3 A/V

VEA

Error Amplifier Voltage Gain (Note 5)

400 V/V

Error Amplifier Transconductance

ΔIC = ±10μA

850 uA/V

Oscillator Frequency V

= 0.6V 1.1 1.4 1.7 MHz

Fold-back Frequency V

= 0V 500 kHz

Maximum Duty Cycle V

= 0.6V 65 %

Minimum On-Time (Note 5) 100 ns

Under Voltage Lockout

Threshold Rising

3.8 4.0 4.2 V

Under Voltage Lockout Threshold

Hysteresis

100 mV

EN Input Low Voltage 0.4 V

EN Input High Voltage 1.2 V

EN Input Current

= 2V

2.1 µA

= 0V

0.1 µA

Supply Current (Shutdown)

= 0V

0.1 1.0 µA

Supply Current (Quiescent)

= 2V, V

= 1V

0.5 0.7 mA

Thermal Shutdown (Note 5) 150 °C

1 2 3 4 5 6 7 8 9 10 ... 14 15

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