
SWCS045B
– SEPTEMBER 2010 – REVISED JUNE 2011
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DCLDR
DC load regulation,
VOUT/VOUT
IOUT = 0 to IOUTmax
0.25
0.5
%
VIN = VINPmin to VINPmax
DCLNR
DC line regulation,
VOUT/VOUT
0.1
0.2
%
IOUT = IOUTmax
Ton
Turn-on time
IOUT = 0, VOUT = 0.1 V up to VOUTmin
100
500
s
Toff
Turn-off time (except VRTC)
IOUT = 0, VOUT down to 10% x VOUT
250
500
s
Pulldown resistor (except VRTC)
Off mode
40
60
80
Ω
f = 217 Hz, IOUT = IOUTmax
55
90
PSRR
Power supply ripple rejection
f = 50 kHz, IOUT = IOUTmax
35
45
dB
f = 1 MHz, IOUT = IOUTmax
30
35
Off mode @ 25
°C
0
0.05
0.15
IQOFF
Off ground current
A
Off mode
0
0.2
1
IOUT = 0, (except VDAC)
12
18
23
IQ0
On ground current
A
IOUT = 0, VDAC
75
150
175
IOUT < 100 μA
4
On ground current coefficient On
αQ
100
μA < IOUT < 1 mA
2
%
mode, IQOUT = IQ0 + αQ * IOUT
IOUT > 1 mA
1
On mode, IOUT = 100 A to
Transient load regulation,
TLDR
IOUTmax/2,
0.75
1.5
%
VOUT/VOUT
Tr = Tf = 1 s
Transient line regulation,
VIN step = 600 mVpp, Tr = Tf = 10
TLNR
0.25
0.5
%
VOUT/VOUT
s
100
< f < 10 kHz
5000
8000
10 kHz
< f < 100 kHz
1250
2500
Noise (except VDAC)
nV/
√Hz
100 kHz
< f < 1 MHz
150
300
f
> 1 MHz
250
500
100
< f < 5 kHz
200
400
Noise (VDAC)
5 kHz
< f < 400 kHz
62
125
nV/
√Hz
400 kHz
< f < 10 MHz
25
50
VAUX3 WHEN USED AS VIBRATOR DRIVER
COUT
Output filtering capacitor
Connected from LDO output to GND
0.6
2.2
2.7
F
Output regulated output range
Configurable step of 100 mV
1.0
3.3
V
Vibrator inductive load
Connected from VAUX3 to ground
70
350
700
H
Vibrator load resistance
15
40
50
Ω
REFERENCE GENERATOR
Filtering capacitor
Connected from VBG to REFGND
30
100
150
nF
Biasing resistor (
±1%) @ 25°C
Connected from IREF to REFGND
0.990
1.000
1.010
M
Ω
Biasing resistor (
±1%) temperature
25
50
ppm/
°C
coefficient
VINF
Input voltage VINF
Functional
1.9
2.2
2.3
V
VINP
Input voltage VINP
Performance
2.3
3.8
5.5
V
Ground current
15
20
40
A
Start-up time
1
3
ms
CRYSTAL CHARACTERISTICS
Crystal frequency
@ specified load cap value
32768
Hz
Crystal tolerance
T = 25
°C
–20
0
20
ppm
Secondary temperature coefficient
–0.04
–0.035
–0.03
ppm/
°C2
Crystal series resistor
@ fundamental frequency
90
k
Ω
Operating drive level
0.1
0.5
W
Crystal load capacitor (according to
12.5
pF
crystal data sheet)
20
Copyright
2010–2011, Texas Instruments Incorporated