Datasheet

TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011 www.ti.com
4.1.12 VAUX3 LDO Regulator
The VAUX3 GP LDO regulator powers the auxiliary devices. Table 4-14 lists the characteristics of the
regulator.
Table 4-14. VAUX3 LDO Regulator Characteristics
Parameter Test Conditions Min Typ Max Unit
Output Load Conditions
Filtering capacitor Connected from VAUX3.OUT to analog ground 0.3 1 2.7 μF
Filtering capacitor ESR 20 600 mΩ
Electrical Characteristics
V
IN
Input voltage 2.7 3.6 4.5 V
1.455 1.5 1.545
1.746 1.8 1.854
V
OUT
Output voltage On mode and low-power mode 2.425 2.5 2.575 V
2.716 2.8 2.884
2.91 3.0 3.09
On mode 200
I
OUT
Rated output current mA
Low-power mode 5
dc load regulation On mode: I
OUT
= I
OUTmax
to 0 20 mV
dc line regulation On mode, V
IN
= V
INmin
to V
INmax
at I
OUT
= I
OUTmax
3 mV
Turn-on time I
OUT
= 0, C
L
= 1 μF (within 10% of V
OUT
) 100 μs
Wake-up time Full load capability 10 μs
f < 10 kHz 50
10 kHz < f < 100 kHz 40
Ripple rejection dB
f = 1 MHz 25
V
IN
= V
OUT
+ 1 V, I
O
= I
Max
On mode, I
OUT
= 0 70
On mode, I
OUT
= I
OUTmax
270
Ground current Low-power mode, I
OUT
= 0 15 μA
Low-power mode, I
OUT
= 5 mA 20
Off mode at 55°C 1
V
DO
Dropout voltage On mode, I
OUT
= I
OUTmax
250 mV
I
Load
: I
Min
– I
Max
Transient load regulation –40 40 mV
Slew: 40 mA/μs
V
IN
drops 500 mV
Transient line regulation 10 mV
Slew: 40 mV/μs
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