LP5523 datasheet(6/61 Pages) TI2

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LP5523

SNVS550E – SEPTEMBER 2009 – REVISED JANUARY 2017

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(1)

The Electrical Characteristics tables list ensured specifications under Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics conditions and/or notes. Typical specifications are estimations only and are not ensured.

(2)

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

(3)

Minimum and maximum limits are ensured by design, test, or statistical analysis.

(4)

Turnon time is measured from the moment the charge pump is activated until the VOUT crosses 90% of its target value.

6.6 Charge Pump Electrical Characteristics

Unless otherwise noted: typical limits are for TA = 25°C; minimum and maximum limits apply over the operating ambient

temperature range (

−30°C < TA < +85°C). See

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ROUT

Charge pump output resistance

Gain = 1.5×

3.5

Ω

Gain = 1×

ƒSW

Switching frequency

1.25

MHz

IGND

Ground current

Gain = 1.5×

1.2

Gain = 1×

0.3

tON

VOUT turnon time

(4)

VDD = 3.6 V, IOUT = 60 mA

100

µs

(1)

The Electrical Characteristics tables list ensured specifications under Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics conditions and/or notes. Typical specifications are estimations only and are not ensured.

(2)

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

(3)

Minimum and maximum limits are ensured by design, test, or statistical analysis.

(4)

Output current accuracy is the difference between the actual value of the output current and programmed value of this current. Matching

is the maximum difference from the average. For the constant current outputs on the part (D1 to D9), the following are determined: the

maximum output current (MAX), the minimum output current (MIN), and the average output current of all outputs (AVG). Two matching

numbers are calculated: (MAX – AVG) / AVG and (AVG – MIN) / AVG. The largest number of the two (worst case) is considered the

matching figure. Note that some manufacturers have different definitions in use.

(5)

Saturation voltage is defined as the voltage when the LED current has dropped 10% from the value measured at VOUT – 1 V.

6.7 LED Driver Electrical Characteristics

Unless otherwise noted limits apply for TA = 25°C. See

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ILEAKAGE

Leakage current (outputs D1

to D9)

PWM = 0%

0.1

µA

IMAX

Maximum source current

Outputs D1 to D9

25.5

IOUT

Output current accuracy (4)

Output current set to 17.5 mA

−4%

−30°C < TA < +85°C

–5%

IMATCH

Matching (4)

Output current set to 17.5 mA

2.5%

ƒLED

LED switching frequency

312

VSAT

Saturation voltage (5)

Output current set to 17.5 mA

100

(1)

The Electrical Characteristics tables list ensured specifications under Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics conditions and/or notes. Typical specifications are estimations only and are not ensured.

(2)

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

(3)

Minimum and maximum limits are ensured by design, test, or statistical analysis.

(4)

Total unadjusted error includes offset, full-scale, and linearity errors.

6.8 LED Test Electrical Characteristics

Unless otherwise noted limits apply for TA = 25°C. See

(1) (2) (3)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LSB

Least significant bit

EABS

Total unadjusted error(4)

VIN_TEST = 0 V to VDD

< ±3

±4

LSB

tCONV

Conversion time

2.7

VIN_TEST

DC voltage range

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