AP5101 datasheet(5/15 Pages) DIODES

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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

Electrical Characteristics (VIN = 12V, TA = +25°C, unless otherwise noted)

Note:

5. Guaranteed by design

Symbol

Parameter

Test Conditions

Min

Typ.

Max

Unit

VFB

Feedback Voltage

4.75V

≤ V

IN ≤ 22V

0.790

0.810

0.830

IFB

Feedback Current

VFB = 0.8V

0.1

µA

R DS(ON)

Switch-On Resistance (Note 5)

0.35

Ω

Switch Leakage

VEN = 0V, VSW = 0V

µA

Current Limit (Note 5)

2.5

GCS

Current Sense Transconductance

Output Current to Comp Pin Voltage

1.3

A/V

AVEA

Error Amplifier Voltage Gain (Note 5)

400

V/V

GEA

Error Amplifier Transconductance

IC = ±10μA

850

uA/V

fSW

Oscillator Frequency

VFB = 0.6V

1.1

1.4

1.7

MHz

Fold-back Frequency

VFB = 0V

500

kHz

Maximum Duty Cycle

VFB = 0.6V

tON

Minimum On-Time (Note 5)

100

Under Voltage Lockout

Threshold Rising

3.8

4.0

4.2

Under Voltage Lockout Threshold

Hysteresis

100

EN Input Low Voltage

0.4

EN Input High Voltage

1.2

EN Input Current

VEN = 2V

2.1

µA

VEN = 0V

0.1

µA

Supply Current (Shutdown)

VEN = 0V

0.1

1.0

µA

Supply Current (Quiescent)

VEN = 2V, VFB = 1V

0.5

0.7

Thermal Shutdown (Note 5)

150

°C

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