Datasheet

LP5996
www.ti.com SNVS415C –NOVEMBER 2006–REVISED MAY 2013
Electrical Characteristics
(1) (2)
(continued)
Unless otherwise noted, V
EN
= 950mV, V
IN
= V
OUT
+ 1.0V, or 2.0V, whichever is higher, where V
OUT
is the higher of V
OUT1
and
V
OUT2
. C
IN
= 1 µF, I
OUT
= 1 mA, C
OUT1
= C
OUT2
= 1.0µF.
Typical values and limits appearing in normal type apply for T
A
= 25°C. Limits appearing in boldface type apply over the full
junction temperature range for operation, −40 to +125°C.
Limit
Parameter Test Conditions Typ Units
Min Max
PSRR Power Supply Rejection f = 1kHz, I
OUT
= 1mA LDO1 58
Ratio
(5)
to 150mA
LDO2
70
C
BYP
= 10nF
dB
f = 20kHz, I
OUT
= LDO1 45
1mA to 150mA
LDO2
60
C
BYP
= 10nF
e
n
Output noise Voltage
(5)
BW = 10Hz to V
OUT
= 0.8V 36
100kHz µV
RMS
V
OUT
= 3.3V
75
C
BYP
= 10nF
T
SHUTDOWN
Thermal Shutdown Temperature 160
°C
Hysteresis 20
Enable Control Characteristics
I
EN
Input Current at V
EN1
or V
EN2
V
EN
= 0.0V 0.005 0.1
µA
V
EN
= 6V 2 5
V
IL
Low Input Threshold 0.4 V
V
IH
High Input Threshold 0.95 V
Timing Characteristics
T
ON
Turn On Time
(5)
To 95% Level
300 µs
C
BYP
= 10nF
Transient Line Transient Response T
rise
= T
fall
= 10µs
20
Response |δV
OUT
|
(5)
δV
IN
= 1VC
BYP
= 10nF
Load Transient Response T
rise
= T
fall
= 1µs LDO 1 mV
175
|δV
OUT
|
(5)
I
OUT
= 1mA to 150mA (pk - pk)
LDO 2
150
I
OUT
= 1mA to 300mA
(5) This electrical specification is ensured by design.
Output Capacitor, Recommended Specifications
Limit
Parameter Test Conditions Nom Units
Min Max
C
OUT
Output Capacitance Capacitance
1.0 0.7 µF
(1)
ESR 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 is X7R. However, depending on the application, X5R, Y5V and Z5U can also be used. (See capacitor section in Applications
Hints).
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