LMK105BJ105MV-F datasheet(5/28 Pages) AD

Part #	LMK105BJ105MV-F

Description	Dual 3 MHz, 800 mA Buck

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Data Sheet

ADP5023

Rev. A | Page 5 of 28

LDO SPECIFICATIONS

VIN3 = (VOUT3 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V; CIN = COUT = 1 µF; TJ = −40°C to +125°C for minimum/maximum

specifications, and TA = 25°C for typical specifications, unless otherwise noted.1

Table 3.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

INPUT VOLTAGE RANGE

VIN3

1.7

5.5

V

OPERATING SUPPLY CURRENT

Bias Current per LDO2

IVIN3BIAS

IOUT3 = 0 µA

10

30

µA

IOUT3 = 10 mA

60

100

µA

IOUT3 = 300 mA

165

245

µA

Total System Input Current

IIN

Includes all current into AVIN, VIN1, VIN2, and

VIN3

LDO Only

IOUT3 = 0 µA, all other channels disabled

53

µA

OUTPUT CHARACTERISTICS

Output Voltage Accuracy

ΔVOUT3/VOUT3

100 µA < IOUT3 < 300 mA

−3

+3

%

Line Regulation

(ΔVOUT3/VOUT3)/ΔVIN3

IOUT3 = 1 mA

−0.03

+0.03

%/V

Load Regulation3

(ΔVOUT3/VOUT3)/ΔIOUT3

IOUT3 = 1 mA to 300 mA

0.001

0.003

%/mA

VOLTAGE FEEDBACK

VFB3

0.485

0.5

0.515

V

DROPOUT VOLTAGE4

VDROPOUT

VOUT3 = 5.2 V, IOUT3 = 300 mA

50

mV

VOUT3 = 3.3 V, IOUT3 = 300 mA

75

140

mV

VOUT3 = 2.5 V, IOUT3 = 300 mA

100

mV

VOUT3 = 1.8 V, IOUT3 = 300 mA

180

mV

CURRENT-LIMIT THRESHOLD5

ILIMIT3

335

600

mA

ACTIVE PULL-DOWN

RPDWN-L

Channel disabled

600

Ω

OUTPUT NOISE

Regulator LDO

NOISELDO

10 Hz to 100 kHz, VIN3 = 5 V, VOUT3 = 2.8 V

100

µV rms

POWER SUPPLY REJECTION

RATIO

PSRR

Regulator LDO

10 kHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA

60

dB

100 kHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA

62

dB

1 MHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA

63

dB

1

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).

2

This is the input current into VIN3, which is not delivered to the output load.

3

Based on an endpoint calculation using 1 mA and 300 mA loads.

4

Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only to output voltages

above 1.7 V.

5

Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V

output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.

INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS

TA = −40°C to +125°C, unless otherwise specified.

Table 4.

Parameter

Symbol

Min

Typ

Max

Unit

NOMINAL INPUT AND OUTPUT CAPACITOR RATINGS

BUCK1, BUCK2 Input Capacitor Ratings

CMIN1, CMIN2

4.7

40

µF

BUCK1, BUCK2 Output Capacitor Ratings

CMIN1, CMIN2

10

40

µF

LDO1 Input and Output Capacitor Ratings

CMIN3, CMIN4

1.0

µF

CAPACITOR ESR

RESR

0.001

1

Ω

1

The minimum input and output capacitance should be greater than 0.70 µF over the full range of operating conditions. The full range of operating conditions in

the application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R- and X5R-type capacitors are

recommended; Y5V and Z5U capacitors are not recommended for use because of their poor temperature and dc bias characteristics.

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