LP3997

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SNVS272B – MAY 2004 – REVISED MAY 2013

Electrical Characteristics (continued)

Unless otherwise noted, SD = 950mV, VIN = VOUT + 1.0V, CIN = 2.2 µF, IOUT = 1 mA, COUT = 2.2 µF and CBYP = 0.1 µF.

Typical values and limits appearing in normal type apply for TJ = 27°C. Limits appearing in boldface type apply over the full

temperature range for operation,

−40 to +125°C.

(1)

Limit

Symbol

Parameter

Test Conditions

Typ

Unit

Min

Max

Timing Characteristics

tON

Turn On Time (7)

To 95% Level

w/o CBYP

150

250

µs

CBYP = 0.1µF

2

ms

Transient

Line Transient Response

Trise = Tfall = 30µs

(7)

w/o CBYP

40

mV

Response

|

δVOUT|

δVIN = 600mV

(pk - pk)

CBYP = 0.1µF

4

Load Transient Response

Trise = Tfall = 1µs

(7)

70

80

mV

|

δVOUT|

IOUT = 1mA to 150mA

(7)

This electrical specification is ensured by design.

Output Capacitor, Recommended Specifications

Limit

Symbol

Parameter

Conditions

Typ

Unit

Min

Max

Co

Output Capacitor

Capacitance(1)

2.2

0.7

µF

ESR

5

500

m

Ω

(1)

The capacitor tolerance should be 30% or better over temperature. The full operating conditions for the application should be considered

when selecting a suitable capacitor to ensure that the minimum value of capacitance is always met. Recommended capacitor type is

X7R. However, dependent on application, X5R, Y5V, and Z5U can also be used. (See capacitor characteristics section in Applications

Information).

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