Datasheet

TPS65950
SWCS032E–OCTOBER 2008–REVISED JANUARY 2011 www.ti.com
4.1.8 VMMC2 LDO Regulator
The VMMC2 LDO regulator is a programmable linear voltage converter that powers MMC slot 2. It
includes a discharge resistor and overcurrent (short-circuit) protection. The VMMC2 LDO can be powered
through an independent supply other than the battery (for example, a CP). In this case, the input from the
VMMC2 LDO can be higher than the battery voltage. Table 4-10 lists the characteristics of the regulator.
Table 4-10. VMMC2 LDO Regulator Characteristics
Parameter Test Conditions Min Typ Max Unit
Output Load Conditions
Filtering capacitor Connected from VMMC2.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 5.5 V
0.7 1.0 1.03
1.164 1.2 1.236
1.261 1.3 1.339
1.455 1.5 1.545
1.746 1.8 1.854
1.795 1.85 1.906
V
OUT
Output voltage On mode and low-power mode V
2.425 2.5 2.575
2.522 2.6 2.678
2.716 2.8 2.884
2.765 2.85 2.936
2.91 3.0 3.09
3.056 3.15 3.245
On mode 100
I
OUT
Rated output current mA
Low-power mode 5
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
170
Ground current Low-power mode, I
OUT
= 0 17 μA
Low-power mode, I
OUT
= 50 μA 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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