Datasheet

TPS65950
www.ti.com SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
4.1.9 VSIM LDO Regulator
The VSIM voltage regulator is a programmable, low-dropout, linear voltage regulator that supplies the
subscriber identity module (SIM)-card and the SIM-card driver. This LDO regulator can be turned off
automatically when SIM card extraction is detected. Table 4-11 lists the characteristics of the regulator.
Table 4-11. VSIM LDO Regulator Characteristics
Parameter Test Conditions Min Typ Max Unit
Output Load Conditions
Filtering capacitor Connected from VSIM.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
0.97 1.0 1.03
1.164 1.2 1.236
1.261 1.3 1.339
V
OUT
Output voltage On mode and low-power mode V
1.746 1.8 1.854
2.716 2.8 2.884
2.91 3.0 3.09
On mode 50
I
OUT
Rated output current mA
Low-power mode 1
dc load regulation On mode: 0 < I
O
< I
Max
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 30
V
IN
= V
OUT
+ 1 V, I
O
= I
Max
On mode, I
OUT
= 0 70
On mode, I
OUT
= I
OUTmax
120
Ground current Low-power mode, I
OUT
= 0 15 μA
Low-power mode, I
OUT
= 1 mA 16
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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