LP3954RLSLASHNOPB datasheet(6/60 Pages) TI1

6 / 60 page

LP3954

SNVS340D – JUNE 2005 – REVISED MARCH 2013

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Electrical Characteristics

(1) (2)

Limits in standard typeface are for TJ = 25° C. Limits in boldface type apply over the operating ambient temperature range (-

30°C < TA < +85°C). Unless otherwise noted, specifications apply to the LP3954 Block Diagram with: VDD1 = VDD2 = 3.6V,

VDDIO = 2.8V, CVDD = CVDDIO = 100nF, COUT = CIN = 10µF, CVDDA = 1µF, CREF = 100nF, L1 = 4.7µH, RFLASH =1.2k, RRGB =5.6k

and RRT =82k

(3).

Parameter

Test Conditions

Min

Typ

Max

Unit

IVDD

Standby supply current

NSTBY = L

µA

(VDD1, VDD2)

SCK, SS, SI

No-boost supply current

NSTBY = H,

400

µA

(VDD1, VDD2)

EN_BOOST = L

SCK, SS, SI

Audio sync and LEDs OFF

No-load supply current

NSTBY = H,

(VDD1, VDD2)

EN_BOOST = H

SCK, SS, SI

Audio sync and LEDs OFF

Autoload OFF

RGB drivers

CC mode at R1, G1, B1 and R2, G2,

150

µA

(VDD1, VDD2)

B2 set to 15mA

SW mode

150

WLED drivers

4+2 banks IOUT/LED 25mA

500

µA

(VDD1, VDD2)

Audio synchronization

Audio sync ON

(VDD1, VDD2)

VDD1,2 = 2.8V

390

µA

VDD1,2 = 3.6V

700

Flash

I(RFLASH)=1mA

(VDD1, VDD2)

Peak current during flash

IVDDIO

VDDIO Standby Supply current

NSTBY = L

µA

SCK, SS, SI = H

VDDIO supply current

1MHz SCK frequency in SPI mode,

µA

CL = 50pF at SO pin

IEXT_LDO

External LDO output current

7V tolerant application only

6.5

(VDD1, VDD2, VDDA)

IBOOST = 300mA

VDDA

Output voltage of internal LDO

(4)

2.72

2.80

2.88

for analog parts

-3

(1)

All voltages are with respect to the potential at the GND pins.

(2)

Min and Max limits are ensured by design, test, or statistical analysis. Typical numbers are not ensured, but do represent the most likely

norm.

(3)

Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.

(4)

VDDA output is not recommended for external use.

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