LP3986

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SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013

Electrical Characteristics (continued)

Unless otherwise specified: VIN = VOUT(nom) + 0.5V, CIN = 1 µF, IOUT = 1mA, COUT = 1 µF, CBYPASS = 0.01µF. Typical values and

limits appearing in standard typeface are for TJ = 25°C. Limits appearing in boldface type apply over the entire junction

temperature range for operation,

−40°C to +125°C.

(1) (2)

Limit

Symbol

Parameter

Conditions

Typ

Units

Min

Max

IOUT(PK)

Peak Output Current(6)

VOUT ≥ VOUT(nom) - 5%

500

300

mA

TON

Turn-On Time(7)

CBYPASS = 0.01 µF

200

µs

en

Output Noise Voltage

BW = 10 Hz to 100 kHz,

40

µVrms

COUT = 1µF

ρn(1/f)

Output Noise Density

f = 120 Hz,

1

µV/

√Hz

COUT = 1µF

IEN

Maximum Input Current at EN

VEN = 0.4 and VIN = 6V

±10

nA

VIL

Maximum Low Level Input

VIN = 2.7 to 6V

0.4

V

Voltage at EN

VIH

Minimum High Level Input

VIN = 2.7 to 6V

1.4

V

Voltage at EN

ΔILoad1 = 150 mA at 1KHz rate

ΔILoad2 = 1 mA

ΔVOUT2/ΔVOUT1

−60

Xtalk

Crosstalk Rejection

dB

ΔILoad2 = 150 mA at 1KHz rate

ΔILoad1 = 1 mA

ΔVOUT2/ΔVOUT1

−60

All VOUT > = 2.5V,

1

µF

CIN

Input capacitance(8)

If VOUT = 1.8V,

4.7

µF

VIN_MIN>= 2.9V

COUT

Capacitance(8)

All VOUT > = 2.5V,

1

22

µF

If VOUT = 1.8V,

2.2

22

µF

VIN_MIN>= 2.9V

ESR

See (9)

5

500

m

Ω

(6)

IPEAK guaranteed for Vout 's of 2.5V and greater.

(7)

Turn-on time is that between the enable input just exceeding VIH and the output voltage just reaching 95% of its nominal value.

(8)

Range of capacitor values for which the device will remain stable. This electrical specification is guaranteed by design.

(9)

Range of capacitor ESR values for which the device will remain stable. This electrical specification is guaranteed by design.

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