LQM18FN1R0M00B datasheet(4/28 Pages) AD

Part #	LQM18FN1R0M00B

Description	Dual 3 MHz, 800 mA Buck Regulators with Two 300 mA LDOs

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ADP5037

Data Sheet

Rev. D | Page 4 of 28

BUCK1 AND BUCK2 SPECIFICATIONS

VAVIN = VIN1 = VIN2 = 2.3 V to 5.5 V; 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

OUTPUT CHARACTERISTICS

Output Voltage Accuracy

ΔVOUT1/VOUT1,

ΔVOUT2/VOUT2

PWM mode; ILOAD1 = ILOAD2 = 0 mA

−1.8

+1.8

%

Line Regulation

(∆VOUT1/VOUT1)/∆VIN1,

(∆VOUT2/VOUT2)/∆VIN2

PWM mode

−0.05

%/V

Load Regulation

(∆VOUT1/VOUT1)/∆IOUT1,

(∆VOUT2/VOUT2)/∆IOUT2

ILOAD = 0 mA to 800 mA, PWM mode

−0.1

%/A

VOLTAGE FEEDBACK

VFB1, VFB2

Models with adjustable outputs

0.491

0.5

0.509

V

OPERATING SUPPLY CURRENT

MODE = ground

BUCK1 Only

IIN

ILOAD1 = 0 mA, device not switching, all other

channels disabled

44

μA

BUCK2 Only

IIN

ILOAD2 = 0 mA, device not switching, all other

channels disabled

55

μA

BUCK1 and BUCK2

IIN

ILOAD1 = ILOAD2 = 0 mA, device not switching,

LDO channels disabled

67

μA

PSM CURRENT THRESHOLD

IPSM

PSM to PWM operation

100

mA

SW CHARACTERISTICS

SW On Resistance

RNFET

VIN1 = VIN2 = 3.6 V

155

240

mΩ

RPFET

VIN1 = VIN2 = 3.6 V

205

310

mΩ

RNFET

VIN1 = VIN2 = 5.5 V

137

204

mΩ

RPFET

VIN1 = VIN2 = 5.5 V

162

243

mΩ

Current Limit

ILIMIT1, ILIMIT2

pFET switch peak current limit

1200

1550

1900

mA

ACTIVE PULL-DOWN

RPDWN-B

Channel disabled

75

Ω

OSCILLATOR FREQUENCY

fSW

2.5

3.0

3.5

MHz

1

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

LDO1 AND LDO2 SPECIFICATIONS

VIN3 = (VOUT3 + 0.5 V) or 1.7 V (whichever is greater) to 5.5 V, VIN4 = (VOUT4 + 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 4.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

INPUT VOLTAGE RANGE

VIN3, VIN4

1.7

5.5

V

OPERATING SUPPLY CURRENT

Bias Current per LDO2

IVIN3BIAS/IVIN4BIAS

IOUT3 = IOUT4 = 0 µA

10

30

µA

IOUT3 = IOUT4 = 10 mA

60

100

µA

IOUT3 = IOUT4 = 300 mA

165

245

µA

Total System Input Current

IIN

Includes all current into AVIN, VIN1, VIN2, VIN3,

and VIN4

LDO1 or LDO2 Only

IOUT3 = IOUT4 = 0 µA, all other channels disabled

53

µA

LDO1 and LDO2 Only

IOUT3 = IOUT4 = 0 µA, buck channels disabled

74

µA

OUTPUT CHARACTERISTICS

Output Voltage Accuracy

ΔVOUT3/VOUT3,

ΔVOUT4/VOUT4

100 µA < IOUT3 < 300 mA, 100 µA < IOUT4 < 300 mA

−1.8

+1.8

%

Line Regulation

(∆VOUT3/VOUT3)/∆VIN3,

(∆VOUT4/VOUT4)/∆VIN4

IOUT3 = IOUT4 = 1 mA

−0.03

+0.03

%/V

Load Regulation3

(∆VOUT3/VOUT3)/∆IOUT3,

(∆VOUT4/VOUT4)/∆IOUT4

IOUT3 = IOUT4 = 1 mA to 300 mA

0.001

0.003

%/mA

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