LP3910 datasheet(12/72 Pages) TI1

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LP3910

SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015

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7.14 Electrical Characteristics: LDO2 Low Dropout Linear Regulator

Unless otherwise noted VIN1 = 3.6V, IMAX = 150 mA, VOUT = default value, CVDD = 10 µF, CLDO2 = 1 µF, ESR = 5 mΩ to 500

Ω, CVREFH = 100 nF. Typical limits apply for TJ = 25°C; minimum and maximum limits apply for TJ = 0°C to 125°C, unless

otherwise specified.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN2

Operational voltage

2.5

Output voltage programming

TA = 25°C

VOUT range

1.3

3.3

range

1.3 V to 3.3 V in 100-mV steps

Output voltage accuracy

1 mA

≤ IOUT ≤ IMAX over full line

VOUT accuracy

–3%

(default VOUT)

and load regulation

VIN = (VOUT + 500 mV) to 5.5 V,

Line regulation

Load current = IMAX

ΔVOUT

VIN = 3.6 V,

Load regulation

Load current = 1 mA to IMAX

ISC

Short-circuit current limit

VOUT = 0 V

600

750

VIN – VOUT

Dropout voltage

Load current = IMAX

150

F = 1 kHz, load current = IMAX

PSRR

Power supply ripple rejection

F = 10 kHz, load current = IMAX

Analog supply output noise

10 Hz < F < 100 kHz

µVRMS

voltage

LDO disabled, VOUT = default

RSHUNT

LDO output impedance

200

Ω

value

7.15 Electrical Characteristics: Buck1 Converter

Unless otherwise noted, VIN2 = 3.6 V, VOUT = default value, CVIN2 = 10 µF, CSW1 = 10 µF, LSW1 = 2.2 µH. Typical limits apply

for TJ = 25°C; minimum and maximum limits apply for TJ = 0°C to 125°C, unless otherwise specified. Modulation mode is

PWM mode with automatic switch to PFM at light loads.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN2

Input voltage

2.7

Output voltage programming

TJ = 25°C

VOUT range

0.8

range

0.8 V to 2 V in 50-mV Steps

IOUT = 200 mA including line and

Static output voltage tolerance

–3%

load regulation

ΔVOUT

IOUT = 10 mA

Line regulation

0.2

%/V

VIN2 = 2.5 V − VDD

Load regulation

100 mA < IOUT < 300 mA

0.002

%/mA

Continuous output current

600

IOUT

Peak output current limit

850

1000

1150

IPFM

Maximum ILOAD, PFM mode

IOUT = 0 mA

Quiescent current

µA

BUCK1 disabled

FOSC

Internal oscillator frequency

PWM mode

MHz

Peak efficiency

90%

TON

Turnon time

To 95% level(1)

(1)

This specification is ensured by design.

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