AP5724

WHITE LED STEP-UP CONVERTER

AP5724

Document number: DS31843 Rev. 3 - 2

4 of 17

www.diodes.com

July 2010

© Diodes Incorporated

Symbol

Parameter

Conditions

Min

Typ.

Max

Unit

System Supply Input

Operating Input Voltage

2.7

-

5.5

V

UVLO

Under Voltage Lockout

-

2.2

2.4

V

Under Voltage Lockout

Hysteretic

-

85

-

mV

Quiescent Current

FB=0.2V, No Switching

-

500

-

μA

Shutdown Current

-

0.1

1

μA

Oscillator

Operation Frequency

1

1.2

1.4

MHz

Dmax

Maximum Duty Cycle

86

90

-

%

Reference Voltage

Feedback Voltage

0.09

0.1

0.11

V

FB Pin Bias Current

10

45

100

nA

MOSFET

Rds(on)

On Resistance of MOSFET

-

0.95

1.2

Ω

Switching Current Limit

Normal Operation

-

750

-

mA

Control and Protection

EN

Voltage High

ON

1.5

-

-

V

EN

Voltage Low

OFF

-

-

0.4

V

EN Pin Pull Low Current

-

4

6

μA

OVP

OVP Threshold

26

30

34

V

θ

JA

Thermal Resistance Junction-to-

Ambient

SOT26 (Note 2)

162

TSOT23-6 (Note 2)

152

DFN2020C-6 (Note 2)

200

θ

JC

Thermal Resistance Junction-to-

Case

SOT26 (Note 2)

36

TSOT23-6 (Note 2)

32

DFN2020C-6 (Note 2)

30

Notes:

2. Test condition for SOT26, TSOT23-6 and DFN2020C-6: Device mounted on FR-4 substrate, single-layer PC board, 2oz copper,

with minimum recommended pad layout