AP5725

WHITE LED STEP-UP CONVERTER

AP5725 Rev. 1

4 of 16

JUNE 2009

www.diodes.com

Recommended Operating Conditions

Symbol

Parameter

Min

Max

Unit

Input Voltage

2.7

5.5

V

Operating Junction Temperature

-40

125

Operating Ambient Temperature

-40

85

Electrical Characteristics

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=0.35V, 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

0.225

0.25

0.275

V

FB Pin Bias Current

10

45

100

nA

MOSFET

Rds(on) On Resistance of MOSFET

0.5

0.75

1.0

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 3)

162

DFN2020C-6 (Note 3)

200

θ

JC

Thermal Resistance

Junction-to-Case

SOT26 (Note 3)

36

DFN2020C-6 (Note 3)

30

Notes:

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

recommended pad layout