PRODUCTPREVIEW
SWCS046C – MARCH 2010 – REVISED JUNE 2010
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VAUX1 AND VAUX2 LDO
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input voltage (VCC4) VIN
VOUT (VAUX1) = 1.8 V and VOUT (AUX2) = 1.8 V
2.7
5.5
VOUT (VAUX1) = 2.5 V
3.2
5.5
VOUT (VAUX1) = 2.8 V @ Iload = 200 mA and 2.85 V
3.2
5.5
@ Iload = 200mA
V
VOUT (VAUX2) = 2.8 V
3.2
5.5
VOUT (VAUX2) = 2.9 V @ Iload = 100mA
3.2
5.5
VOUT (VAUX2) = 3.3 V
3.6
5.5
VAUX1
DC output voltage VOUT
On and low-power mode, VIN = VINmin to VINmax
SEL = 11, IOUT = 0 to 200 mA
–3%
3.3
+3%
SEL = 10, IOUT = 0 to 200 mA
–3%
2.8
+3%
V
SEL = 01, IOUT = 0 to IOUTmax
–3%
2.0
+3%
SEL = 00, IOUT = 0 to IOUTmax, default BOOT[1:0] =
–3%
1.8
+3%
00 or 01
Rated output current IOUTmax
On mode
300
mA
Low-power mode
1
Load current limitation
On mode, VOUT = VOUTmin – 100 mV
350
500
mA
(short-circuit protection)
Dropout voltage VDO
On mode, VOUTtyp = 2.8 V, VDO = VIN – VOUT,
VIN = 3.0 V, IOUT = 200 mA, T = 25°C
200
mV
DC load regulation
On mode, IOUT = 200 mA to 0
15
mA
DC line regulation
On mode, IOUT = 200 mA
1
V
On mode, VIN = 3.8 V, IOUT = 20 mA to 180 mA in 5
Transient load regulation
12
mV
s
and IOUT = 180 mA to 20 mA in 5s
On mode, IOUT = 200 mA, VIN= VINmin + 0.5 V to
Transient line regulation
0.5
mV
VINmin in 30 s
and VIN = VINmin to VINmin + 0.5v in 30 s, IOUT =
IOUTmax/2
Turn-on time
IOUT = 0, @ VOUT = 0.1 V up to VOUTmin, no load
100
s
Turn-on inrush current
600
mA
VIN = VINDC + 100 mVpp tone, VINDC+ = 3.8 V, IOUT =
Ripple Rejection
IOUTmax/2
f = 217 Hz
70
dB
f = 50 kHz
40
VAUX1 internal resistance
LDO Off
60
Ω
Ground current
On mode, IOUT = 0
60
On mode, IOUT = IOUTmax
2700
A
Low-power mode
12
Off mode
1
VAUX2
On and low-power mode, VIN = VINmin to VINmax
SEL = 11, IOUT = 0 to IOUTmax
–3%
3.3
+3%
SEL = 10, IOUT = 0 to 100 mA
–3%
2.9
+3%
V
SEL = 01, IOUT = 0 to IOUTmax
–3%
2.8
+3%
SEL = 00, IOUT = 0 to IOUTmax, default BOOT[1:0] =
–3%
1.8
+3%
00 or 01
Rated output current IOUTmax
On mode
150
mA
Low-power mode
1
24
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