LP3997_15 Datasheet, PDF (5/18 Pages) Texas Instruments – Micropower 250-mA CMOS LDO Regulator With Error Flag and Power-On-Reset

LP3997
www.ti.com
SNVS272B – MAY 2004 – REVISED MAY 2013
Electrical Characteristics (continued)
Unless otherwise noted, SD = 950mV, V_IN = V_OUT + 1.0V, C_IN = 2.2 µF, I_OUT = 1 mA, C_OUT = 2.2 µF and C_BYP = 0.1 µF.
Typical values and limits appearing in normal type apply for T_J = 27°C. Limits appearing in boldface type apply over the full
temperature range for operation, −40 to +125°C. ⁽¹⁾
Symbol
Parameter
Test Conditions
Limit
Typ
Unit
Min
Max
Timing Characteristics
t_ON
Turn On Time ⁽⁷⁾
To 95% Level
w/o C_BYP
150
C_BYP = 0.1µF
2
Transient
Line Transient Response
T_rise = T_fall = 30µs ⁽⁷⁾
w/o C_BYP
40
Response |δV_OUT|
δV_IN = 600mV
C_BYP = 0.1µF
4
Load Transient Response
|δV_OUT|
T_rise = T_fall = 1µs ⁽⁷⁾
I_OUT = 1mA to 150mA
70
250
µs
ms
mV
(pk - pk)
80
mV
(7) This electrical specification is ensured by design.
Output Capacitor, Recommended Specifications
Symbol
C_o
Parameter
Output Capacitor
Conditions
Capacitance ⁽¹⁾
ESR
Limit
Typ
Unit
Min
Max
2.2
0.7
µF
5
500
mΩ
(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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