ADP2140 datasheet(4/32 Pages) AD

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ADP2140

Data Sheet

Rev. B | Page 4 of 32

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

Output Noise

OUTNOISE

VIN2 = VIN1 = 5 V, IOUT2 = 10 mA

10 Hz to 100 kHz, VOUT2 = 0.8 V

µV rms

10 Hz to 100 kHz, VOUT2 = 1.2 V

µV rms

10 Hz to 100 kHz, VOUT2 = 1.8 V

µV rms

10 Hz to 100 kHz, VOUT2 = 2.5 V

µV rms

10 Hz to 100 kHz, VOUT2 = 3.3 V

µV rms

Current Limit

ILIM

TJ = 25°C

360

500

760

Input Leakage Current

ILEAK-LDO

EN2 = GND, VIN2 = 5.5 V and VOUT2 = 0 V

μA

Start-Up Time1

tSTART-UP

VOUT2 = 3.3 V, 300 mA load

µs

Soft Start Time2

SSTIME

VOUT2 = 3.3 V, 300 mA load

130

μs

ADDITIONAL FUNCTIONS

Undervoltage Lockout

UVLO

Input Voltage Rising

UVLORISE

2.23

2.3

Input Voltage Falling

UVLOFALL

2.05

2.16

EN Input

EN1, EN2 Input Logic High

VIH

2.3 V ≤ VIN1 ≤ 5.5 V

1.0

EN1, EN2 Input Logic Low

VIL

2.3 V ≤ VIN1 ≤ 5.5 V

0.27

EN1, EN2 Input Leakage

IEN-LKG

EN1, EN2 = VIN1 or GND

0.05

µA

EN1, EN2 = VIN1 or GND

µA

Shutdown Current

ISHUT

VIN1 = 5.5 V, EN1, EN2 = GND, TJ = −40°C to +85°C

0.3

1.2

μA

Thermal Shutdown

Threshold

TSSD

TJ rising

150

°C

Hysteresis

TSSD-HYS

°C

Power Good

Rising Threshold

PGRISE

%VOUT

Falling Threshold

PGFALL

%VOUT

Power-Good Hysteresis

PGHYS

%VOUT

Output Low

VOL

ISINK = 4 mA

0.2

Leakage Current

IOH

Power-good pin pull-up voltage = 5.5 V

μA

Buck to LDO Delay

tDELAY

PWM mode only

Power-Good Delay

tRESET

PWM mode only

Start-up time is defined as the time between the rising edge of ENx to VOUTx being at 10% of the VOUTx nominal value.

Soft start time is defined as the time between VOUTx being at 10% to VOUTx being at 90% of the VOUTx nominal value.

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

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 for output

voltages above 2.3 V.

RECOMMENDED SPECIFICATIONS: CAPACITORS AND INDUCTOR

Table 2.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

MINIMUM INPUT AND OUTPUT CAPACITANCE1

TA = −40°C to +125°C

Buck

CMIN

7.5

µF

LDO

CMIN

0.7

1.0

µF

CAPACITOR ESR

TA = −40°C to +125°C

Buck

RESR

0.001

0.01

LDO

RESR

0.001

MINIMUM INDUCTOR

INDMIN

0.7

μH

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 with any LDO.

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