Electrical Characteristics

1

C

V

Symbol

Description

Conditions

Min Typ Max

Units

Input Power Supply

V

IN

Operation Range

2.7

5.5

V

I

cc

Operating Current

VD1:D3 = 2.0V, CP = 1X

550

µA

No Load Current, CP = 1.5X

3

5

mA

I

SHDN

Shutdown Current

V

1

µA

I

DX

Output Current Accuracy

2

V

-10

10

%

I

(D-Match)

Current Matching

3

VD1:D3 = 3.6V, V

-3

±0.5

3

%

η

CP

Charge Pump Section Efficiency

V

93

%

Measured from IN to CP

Charge Pump Section

T

SS

Soft-Start Time

50

µs

F

CLK

Clock Frequency

1

MHz

EN/SET

V

EN(L)

Enable Threshold Low

V

0.4

V

V

EN(H)

Enable Threshold High

V

1.4

V

T

EN/SET LO

EN/SET Low Time

0.3

75

µs

T

EN/SET HI MIN

Minimum EN/SET High Time

50

ns

T

EN/SET HI MAX

Maximum EN/SET High Time

75

µs

T

OFF

EN/SET Off Timeout

500

µs

T

LAT

EN/SET Latch Timeout

500

µs

I

EN/SET

EN/SET Input Leakage

V

-1

1

µA

AAT3142

High Efficiency 1X/1.5X/2X Charge Pump

for White LED Applications

4

3142.2007.03.1.2

1. The AAT3142 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured

by design, characterization, and correlation with statistical process controls.

2. Codes 2 through 7 are guaranteed to be within ±15% of stated current level.

3. Current matching is defined as I