
Analog Integrated Circuit Device Data
Freescale Semiconductor
81
PC34708
Functional Block Requirements and Behaviors
LDO Regulators Description and Application Information
VINPLL can be connected to either BP or a 1.8 V switched mode power supply rail such as from SW5 for the two lower set points
of each regulator VPLL[1:0] = [00], [01]. In addition, when the two upper set points (VPLL[1:0] = [10],[11]) are used, the VINPLL
inputs can be connected to either BP or a 2.2 V nominal external switched mode power supply rail, to improve power dissipation.
Table 78. VPLL Voltage Control
Parameter Value
Function
ILoad max
Input Supply
VPLL[1:0]
00
output = 1.2 V
50 mA
BP or 1.8 V
01
output = 1.25 V
50 mA
BP or 1.8 V
10
output = 1.50 V
50 mA
BP or External Switcher
11
output = 1.8 V
50 mA
BP or External Switcher
Table 79. VPLL Electrical Specification
Characteristics noted under conditions BP = 3.6 V, VBUS = 5.0 V, -40°C ≤ TA ≤ 85°C, unless otherwise noted. Typical values at
BP = 3.6 V and TA = 25°C under nominal conditions, unless otherwise noted.
Symbol
Characteristic
Min
Typ
Max
Unit
Notes
GENERAL
VINPLL
Operating Input Voltage Range
VPLL all settings, BP biased
VPLL [1:0] = 00, 01 (SW5 = 1.8 V)
VPLL, [1:0] = 10, 11, External Switcher
UVDET
1.75
2.15
-
1.8
2.2
4.5
V
IPLL
Operating current Load range
-
50
mA
VPLL ACTIVE MODE – DC
VPLL
Output Voltage VOUT
VINMIN < VIN < VINMAX ILMIN < IL < ILMAX
VNOM –
0.05
VNOM
VNOM +
0.05
V
VPLL-LOPP Load Regulation
1.0 mA < IL < ILMAX For any VINMIN < VIN < VINMAX
-
0.35
-
mV/mA
VPLL-LIPP
Line Regulation
VINMIN < VIN < VINMAX For any ILMIN < IL < ILMAX
-
5.0
-
mV
IPLL-Q
Quiescent Current
VINMIN < VIN < VINMAX IL = 0
-
8.0
-
A
VPLL ACTIVE MODE – AC
VPLLPSRR PSRR, IL = 75% of ILMAX, 20 Hz to 20 kHz
VIN = UVDET
VIN = VNOM + 1.0 V, > UVDET
35
50
40
60
-
dB
VPLLNOISE Output Noise Density, VIN = VINMIN IL = 75% of ILMAX
100 Hz – 1.0 kHz
> 1.0 kHz – 1.0 MHz
-
20
-
2.5
dB/dec
μV/√Hz
tON-VPLL
Turn-on Time
Enable to 90% of end value VIN = VINMIN, VINMAX IL = 0
-
100
s
tOFF-VPLL
Turn-off Time
Disable to 10% of initial value VIN = VINMIN, VINMAX, IL = 0
0.05
-
10
ms
VPLLOS-
START
Start-up Overshoot
VIN = VINMIN, VINMAX IL = 0
-
1.0
2.0
%