ADD5205 datasheet(4/16 Pages) AD

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ADD5205

Data Sheet

Rev. 0 | Page 4 of 16

SPECIFICATIONS

VIN = 3.7 V, SHDN = high, TA = −25°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

SUPPLY

Input Voltage Range

VIN

2.8

Quiescent Current

VIN = 2.8 V to 18 V, not switching

3.4

Shutdown Supply Current

ISD

VIN = 2.8 V to 18 V, SHDN = 0 V

μA

SWITCH

On Resistance

RDS(ON)

ISW = 100 mA

0.3

Switch Current Limit

ICL

1.9

Leakage Current

ILKG

μA

OSCILLATOR

Switching Frequency

fOSC

MHz

Maximum Duty Cycle

DMAX

SOFT START

Soft Start Time1

1.5

CURRENT SOURCE

ISET Pin Voltage

VSET

1.26

C_FILTER Pin Voltage

VC_FILTER

Duty = 100%

0.22

Adjustable LED Current1

ILED

Constant Current Sink of 20 mA2

ILED20

RSET = 130 kΩ

19.6

20.6

Headroom Voltage of 20 mA2

VHR20

RSET = 130 kΩ

0.66

Current Matching Between Strings2

ILED = 20 mA

−2

LED Current Accuracy of 20 mA2

ILED = 20 mA

−3

Current Source Leakage Current

μA

SHUTDOWN CONTROL

SHDN Voltage High

VSHDN

_HIGH

VIN = 2.8 V to 18 V

1.5

SHDN Voltage Low

VSHDN

_LOW

VIN = 2.8 V to 18 V

0.6

PWM Control

PWM Input Frequency Range1

0.1

kHz

PWM Voltage High

VPWM_HIGH

VIN = 2.8 V to 18 V

1.5

PWM Voltage Low

VPWM_LOW

VIN = 2.8 V to 18 V

0.6

1 Guaranteed by design.

2 Tested at TA = 25°C.

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