AP3156 datasheet(5/15 Pages) DIODES

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AP3156

HIGH EFFICIENCY 1X/1.5X/2X CHARGE PUMP

FOR WHITE LED APPLICATIONS

AP3156 Rev. 1

5 of 15

SEPTEMBER 2009

www.diodes.com

Electrical Characteristics

CIN = COUT = C1 = C2 = 1.0µF; TA = 25°C, VIN = 3.5V. Unless otherwise noted.

Symbol

Parameter

Test Conditions

Min

Typ.

Max

Unit

Quiescent Current

1X Mode, 3.0≤VIN≤5.5, Active,

No Load Current

0.3

1.5X Mode, 3.0≤VIN≤5.5, Active,

No Load Current

2.0

2X Mode, 3.0≤VIN≤5.5, Active,

No Load Current

1.5

50µA Setting, 1X Mode

µA

ISHDN

Shutdown Current

SDI = 0

µA

IDX

ISINK Current Accuracy

(Note 4)

ISET = 20mA (Note 5), TA = 25°C

18.6

21.4

ISET = 4mA (Note 5), TA = 25°C

3.6

4.4

ID-Match

Current Matching Between Any

Two Current Sink Inputs

(Note 6)

VF:

D1:D6 = 3.6V

0.5

VTH

1X to 1.5X or 1.5X to 2X

Transition Threshold at Any

ISINK Pin

ISET = 25mA

150

Charge Pump Section

TSS

Soft-Start Time

µs

FCLK

Clock Frequency

0.5/

MHz

SDI

VSDI(L)

SDI Threshold Low

VIN = 2.7V

0.4

VSDI(H)

SDI Threshold High

VIN = 5.5V

1.4

TSLO

SDI Low Time

0.3

µs

TSHI

SDI High Time

0.05

µs

TOFF

SDI Off Timeout

256

µs

TSEP

SDI Valid Sequence Timeout

256

µs

ISDI

SDI Input Leakage

-1

µA

Thermal Resistance

Junction-to-Ambient

QFN4040-16 (Note 7)

oC/W

Notes:

4. Determined by the average current levels of all active channels

5. Sequence setting set to give nominal 20mA max output current and 4mA output current.

6. Defined as the deviation of any sink current from the average of all active current channels

7. Device mounted on FR-4 substrate, 2"*2", 2oz, copper, double-sided PC board,

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