6

LP3988-Q1

SLAS928B – MARCH 2013 – REVISED NOVEMBER 2016

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Electrical Characteristics (continued)

Unless otherwise specified: VEN = 1.8 V, VIN = VOUT + 0.5 V, CIN = 1 µF, IOUT = 1 mA, COUT = 1 µF; typical values and limits

are for TJ = 25°C, and minimum and maximum values and limits apply over the entire junction temperature range for

operation,

−40°C to +125°C.

(1)(2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

(7)

The low and high thresholds are generated together. Typically a 2.6% difference is seen between these thresholds.

POWER GOOD

VTHL

PG low threshold

% of VOUT (PG ON), TJ = 25°C

(7)

90%

93%

95%

VTHH

PG high threshold

% of VOUT (PG OFF), TJ = 25°C

(7)

92%

95%

98%

VOL

PG output logic low voltage

IPULLUP = 100 µA, fault condition

0.02

0.1

V

IPGL

PG output leakage current

PG off, VPG = 6 V

0.02

µA

(1)

Turnon time is time measured between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal

value.

6.6 Timing Requirements

MIN

NOM

MAX

UNIT

TON

PG turnon time(1), VIN = 4.2 V

10

µs

TOFF

PG turnoff time(1), VIN = 4.2 V

10

µs

6.7 Typical Characteristics

Unless otherwise specified, CIN = COUT = 1-µF ceramic, VIN = VOUT + 0.2 V, TA = 25°C, EN pin is tied to VIN.

Figure 1. Ripple Rejection Ratio

Figure 2. Ripple Rejection Ratio