DA6251.002

27 October, 2017

4 (21)

ELECTRICAL CHARACTERISTICS

unless otherwise specified

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Thermal Shutdown

Temperature

Rising temperature (device off)

Falling temperature (device on)

Note 1

+140

+125

+150

+135

+160

+145

°C

Undervoltage-Lockout

Threshold Levels

Turn on level at VDD rising

Turn off level at VDD falling

1.10

1.05

1.15

1.10

1.20

1.15

V

Over Voltage Protection

Voltage

VOVP

VOUT without feedback resistors

17

17.5

18

V

Output Voltage at

Current Load

VOUT

VIN=3V, VOUT=15V (R2/R1=36.5)

Ω)

15

V

Output Voltage at

Capacitive Load

VOB,

VOS

VIN=3V, VOUT=10V (R2/R1=24)

10

20

10

20

Vpp

VIN=1.2V, VOUT=10V (R2/R1=24)

9.8

19.6

9.5

19

Vpp

Feedback Voltage

VFB

0.38

0.4

0.42

V

LED Current Resistor

Voltage

VRLED

0.19

0.2

0.21

V

Shutdown Current

CTRL=DIN=LOW, VOUT=17.5V (no

external feedback resistors). Note 2

0.11

2

µA

Quiescent Current

CTRL=LOW, DIN=HIGH, no load

VOUT=15V (R2/R1=36.5). Note 3

VIN=3.0V,

VIN=4.2V

400

140

µA

Current Consumption at

Shorted Piezo Driver

Outputs

VIN=3.0V, VOP=VON=GND

176

mA

Current Consumption

VIN=3V, VOUT=10V (R2/R1=24)

3.3

6.7

12.7

23.4

mA

VIN=1.2V, VOUT=10V (R2/R1=24)

12.7

23.4

43

90

mA

Ω)

VIN=3V, VOUT=6.4V (two 3V LEDs)

VIN=3V, VOUT=9.4V (three 3V LEDs)

VIN=3V, VOUT=12.4V (four 3V LEDs)

31

46

66

mA

Efficiency

LED loading

VIN=3V, VOUT=6.4V (two 3V LEDs)

71

%

Note 1: Tested at room temperature. Min and max limits guaranteed by design.

Note 2: DIN has been low at least 15 ms. This shutdown current value is valid for case when no external feedback resistors are connected.

VOUT follows VIN voltage when the device is in shutdown. To keep the shutdown current low the external feedback resistance (R1+R2)

should be kept above 10M

 level.

Note 3: Current consumption when boost converter is active but outputs are not loaded

Note 4: 3x3x1.2mm size 2.2µH inductor from Taiyo Yuden (NR3012T2R2M)