MAS6250 datasheet(4/24 Pages) MAS

4 / 24 page

DA6250.007

13 April, 2018

4 (24)

ELECTRICAL CHARACTERISTICS

TA = -40°C to +85°C, typical values at TA = 27°C, VIN = 3.0 V, L = 2.2 H, CIN = 10 F, COUT = 100 nF, CLOAD = 15 nF, DIN = 3.4 kHz;

unless otherwise specified

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Undervoltage-Lockout

Threshold Levels

UVLORISE

UVLOFALL

Turn on level at VDD rising

Turn off level at VDD falling

1.10

1.05

1.15

1.10

1.20

1.15

Over Voltage

Protection Voltage

VOVP

No feedback resistors R1, R2

17.5

Output Voltage at

Current Load

VOUT

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

ILOAD=15mA (RLOAD=1k

Ω)

Piezo Driver Output

Voltage at Capacitive

Load

VOP,

VON

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

VON: CLOAD=15nF

VOP-VON: CLOAD=15nF

VON: CLOAD=75nF, COUT=470nF

VOP-VON: CLOAD=75nF, COUT=470nF

29.8

14.9

Vpp

VIN=1.2V, VOUT=15V (R2/R1=36.5)

VON: CLOAD=15nF

VOP-VON: CLOAD=15nF

VON: CLOAD=75nF, COUT=470nF

VOP-VON: CLOAD=75nF, COUT=470nF

14.7

29.2

13.6

23.6

Vpp

Feedback Voltage

VFB

0.38

0.4

0.42

LED Current Resistor

Voltage

VRLED

0.19

0.2

0.21

Shutdown Current

ISD

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

external feedback resistors)

Note 1

0.11

µA

Quiescent Current

CTRL=LOW, DIN=HIGH, no load

VOUT=15V (R2/R1=36.5)

VIN=3.0V,

VIN=4.2V, Note 2

400

140

µA

Current Consumption

at Shorted Piezo

Driver Outputs

ISC_VIN

VIN=3.0V, VOP=VON=GND

176

Current Consumption

IIN

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

VON: CLOAD=15nF

VOP-VON: CLOAD=15nF

VON: CLOAD=75nF, COUT=470nF

VOP-VON: CLOAD=75nF, COUT=470nF

6.5

VIN=1.2V, VOUT=15V (R2/R1=36.5)

VON: CLOAD=15nF

VOP-VON: CLOAD=15nF

VON: CLOAD=75nF, COUT=470nF

VOP-VON: CLOAD=75nF, COUT=470nF

160

LED loading ILED=10mA (RLED=20

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)

Efficiency

LED

LED loading

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

ILED=10mA, Note 3

Boost DC/DC

Converter Switch ON-

Resistance

RDS(ON)_LS

Low side switch

VIN=3V, VOUT=15V, TA = 27°C

0.55

1.0



RDS(ON)_HS

High side switch

VIN=3V, VOUT=15V, TA = 27°C

1.1

2.5

Note 1: DIN has been low at least 15 ms. This shutdown current value is valid for case when no external feedback resistors are connected.

When using external VOUT adjusting feedback resistors (R1, R2) the shutdown current will increase by amount of IEXT_FB = VIN/(R1+R2)

since 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 close to 10M

 level.

Note 2: Current consumption when boost converter is active but outputs are not loaded

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

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