Datasheet

TPS65930/TPS65920
SWCS037G–MAY 2008– REVISED APRIL 2011 www.ti.com
4.1.6 VMMC1 LDO Regulator
The VMMC1 LDO regulator is a programmable linear voltage converter that powers the multimedia card
(MMC) slot. It includes a discharge resistor and overcurrent protection (short-circuit). This LDO regulator
can also be turned off automatically when MMC card extraction is detected. The VMMC1 LDO can be
powered through an independent supply other than the battery; for example, a charge pump. In this case,
the input from the VMMC1 LDO can be higher than the battery voltage. Table 4-8 describes the regulator
characteristics.
Table 4-8. VMMC1 LDO Regulator Characteristics
Parameter Test Conditions Min Typ Max Unit
Output Load Conditions
Filtering capacitor Connected from VMMC1.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
1.7945 1.85 1.9055
2.7645 2.85 2.9355
V
OUT
Output voltage On mode and low-power mode V
2.91 3.0 3.09
3.0555 3.15 3.2445
On mode 220
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 25
V
IN
= V
OUT
+ 1 V, I
O
= I
Max
On mode, I
OUT
= 0 70
On mode, I
OUT
= I
OUTmax
290
Ground current Low-power mode, I
OUT
= 0 17 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
40 Power Module Copyright © 2008–2011, Texas Instruments Incorporated
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