ADP5037CP-EVALZ datasheet(5/28 Pages) AD

Part #	ADP5037CP-EVALZ

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

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Data Sheet

ADP5037

Rev. D | Page 5 of 28

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

VOLTAGE FEEDBACK

VFB3, VFB4

0.491

0.5

0.509

V

DROPOUT VOLTAGE4

VDROPOUT

VOUT3 = VOUT4 = 5.2 V, IOUT3 = IOUT4 = 300 mA

50

mV

VOUT3 = VOUT4 = 3.3 V, IOUT3 = IOUT4 = 300 mA

75

140

mV

VOUT3 = VOUT4 = 2.5 V, IOUT3 = IOUT4 = 300 mA

100

mV

VOUT3 = VOUT4 = 1.8 V, IOUT3 = IOUT4 = 300 mA

180

mV

CURRENT-LIMIT THRESHOLD5

ILIMIT3, ILIMIT4

335

600

mA

ACTIVE PULL-DOWN

RPDWN-L

Channel disabled

600

Ω

OUTPUT NOISE

Regulator LDO1

NOISELDO1

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

100

µV rms

Regulator LDO2

NOISELDO2

10 Hz to 100 kHz, VIN4 = 5 V, VOUT4 = 1.2 V

60

µV rms

POWER SUPPLY REJECTION

RATIO

PSRR

Regulator LDO1

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

Regulator LDO2

10 kHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA

54

dB

100 kHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA

57

dB

1 MHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA

64

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/VIN4, 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 5.

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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