LP5523 datasheet(4/56 Pages) TI1

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LP5523

SNVS550D – SEPTEMBER 2009 – REVISED MAY 2013

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Thermal Properties

Junction-to-Ambient Thermal Resistance (

θJA),

87°C/W

YFQ0025LLA Package (1)

(1)

Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power

dissipation exists, special care must be paid to thermal dissipation issues in board design.

Electrical Characteristics

(1) (2) (3)

Limits in standard typeface are for TA = 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 LP5523 Block Diagram with: VDD = 3.6V, VEN =

1.65V, COUT = 1.0 µF, CIN = 1.0 µF, C1–2 = 0.47 µF.

(4)

Symbol

Parameter

Condition

Min

Typ

Max

Units

VEN = 0V, CHIP_EN=0 (bit),

external 32 kHz clock running or

0.2

µA

not running

Standby supply current

CHIP_EN=0 (bit), external 32

1.0

1.7

µA

kHz clock not running

CHIP_EN=0 (bit), external 32

1.4

2.3

µA

kHz clock running

External 32 kHz clock running,

charge pump and current source

0.6

0.75

IVDD

outputs disabled

Charge pump in 1x mode, no

Normal Mode Supply Current

load, current source outputs

0.8

0.95

disabled

Charge pump in 1.5x mode, no

load, current source outputs

1.8

disabled

External 32 kHz clock running

µA

Power Save Mode Supply

Current

Internal oscillator running

0.6

0.75

Internal Oscillator Frequency

−4

fOSC

Accuracy

−7

(1)

The Electrical characteristics tables list ensured specifications under the listed Recommended 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)

Min and Max limits are ensured by design, test, or statistical analysis.

(4)

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

Charge Pump Electrical Characteristics

(1) (2) (3)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Gain = 1.5x

3.5

ROUT

Charge Pump Output Resistance

Ω

Gain = 1x

fSW

Switching Frequency

1.25

MHz

Gain = 1.5x

1.2

IGND

Ground Current

Gain = 1x

0.3

tON

VOUT Turn-On Time

(4)

VDD = 3.6V, IOUT = 60 mA

100

µs

(1)

The Electrical characteristics tables list ensured specifications under the listed Recommended 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)

Min and Max limits are ensured by design, test, or statistical analysis.

(4)

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

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