LP87322ESLASHF datasheet(9/75 Pages) TI1

9 / 75 page

LP87322B-Q1, LP87322D-Q1, LP87322E-Q1, LP87322F-Q1

www.ti.com

SNVSAC5 – SEPTEMBER 2017

Product Folder Links: LP87322B-Q1 LP87322D-Q1 LP87322E-Q1 LP87322F-Q1

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Electrical Characteristics (continued)

Limits apply over the junction temperature range –40°C

≤ TJ ≤ +140°C, specified VVANA, VVIN_Bx, VVIN_LDOx, VVOUT_Bx, VVOUT_LDOx

and IOUT range, unless otherwise noted. Typical values are at TJ = 25°C, VVANA = VVIN_Bx = VVIN_LDOx = 3.7 V, and VOUT = 1 V,

unless otherwise noted

(1) (2).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IPWM-PFM

PWM-to-PFM - current

threshold(5)

290

RDIS_Bx

Output pull-down

resistance

Regulator disabled

150

250

350

Output voltage

monitoring for PGOOD

pin and for Powergood

Interrupt

V(VIN_Bx) and V(VANA) fixed 3.7 V

Overvoltage threshold (compared to DC

output voltage level, VVOUT_Bx_DC)

Undervoltage threshold (compared to DC

output voltage level, VVOUT_Bx_DC)

–53

–40

–29

Deglitch time during operation and after

voltage change

µs

Gating time for PGOOD

signal after regulator

enable or voltage change

PGOOD_MODE = 0

800

µs

LDO REGULATORS

VIN_LDOx

Input voltage range for

LDO power inputs

VIN_LDOx can be higher or lower than V(VANA)

2.5

3.7

5.5

VOUT_LDO

Output voltage

Programmable voltage range

0.8

3.3

Step size

0.1

IOUT_LDOx Output current

300

Dropout voltage

V(VIN_LDOx) – V(VOUT_LDOx), IOUT = IOUT(max),

Programmed output voltage is higher than

V(VIN_LDOx)

200

VOUT_LDO

_DC

DC output voltage

accuracy, includes

voltage reference, DC

load and line regulations,

process, temperature

VOUT < 1 V

–20

VOUT ≥ 1 V

–2%

DCLNR

DC line regulation

IOUT = 1 mA

0.1

%/V

DCLDR

DC load regulation

IOUT = 1 mA to IOUT(max)

0.8%

TLDSR

Transient load step

response

IOUT = 1 mA to 300 mA, TR = TF = 1 µs

–50/+40

TLNSR

Transient line response

V(VIN_LDOx) stepping 3 V ↔ 3.5 V, TR = TF =

10 µs, IOUT = IOUT(max)

±7

PSRR

Power supply ripple

rejection

ƒ = 10 kHz, IOUT = IOUT(max)

Noise

10 Hz < F < 100 kHz, IOUT = IOUT(max)

µVrms

ISHORT(LD

Ox)

LDO current limit

VOUT = 0 V

400

500

600

Start-up time

From enable to valid output voltage

300

µs

Slew rate during start-up

mV/µs

RDIS_LDOx

Output pulldown

resistance

Regulator disabled

150

250

350

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