1
Features
Dual Mode Low Drop Out Voltage Regulator
Programmable Output Voltage Ranging from 1.75V to 2.1V
3V to 5.5V Supply Operation
180 mA Maximum Load Current in Full Power Mode
Maximum Current Consumption 70 A in Full Power Mode and 15 A in Low Power Mode
Power-down Mode Consumption Less Than 1 A
More Than 70dB (Typical) PSRR at 1 KHz
77 V
RMS
Output Noise in Full-power Mode
0.35 m CMOS Technology
Typical Application: Baseband Section Supply in Mobile Terminals
Description
RE030 is a dual mode Low Drop Out (LDO) voltage regulator macrocell with program-
mable output voltage ranging from 1.75V to 2.1V, rated for loads up to 180 mA in full
power mode and 5 mA in low power mode. (Both modes can be selected by the LP9
signal.) It is designed to be integrated with other analog cells, digital logic, microcon-
trollers, DSP cores and memory blocks into system-on-chip products.
The circuit consists of a PMOS pass device, an error amplifier and a feedback resis-
tive network, sized to achieve the required closed loop gain. These blocks make up
the regulating loop. An over-current and short circuit protection circuit has been
included to limit the output current delivered by the regulator, thus avoiding destruction
in case of a short circuit.
An external reference voltage V
BG
(bandgap voltage) is necessary for correct function-
ality. The target reference voltage is 1.231V delivered, for example, by BG019. Double
pads on the supply voltage V
BAT1A
/V
BAT1AA
and output voltage V
COREA
/V
COREAA
are
used to reduce the total output resistance. Current reference is generated inside the
cell through a circuit supplied by a 2.5V 0.1V of regulated input voltage on V
SAUVC
.
Remote sense terminal V
CORES
provides regulation of the load by connecting it to the
output terminal near a critical point to improve performance of the regulator (e.g., con-
necting it to the package pin by double-bonding, thus avoiding the bonding resistance
influence). A ceramic capacitor of 2.2 F connected from V
COREA
/V
COREAA
to ground is
needed as external compensation.
Figure 1. Symbol
(1)
Note:
1. Pin names are written as they appear on the user screen when the symbol is
opened in the design tool environment.
Embedded ASIC
Macrocell:
Power
Management for
Mobile
Terminals (PM)
RE030
1.75V to 2.1V
180 mA
Dual Mode LDO
Regulator
Rev. 2706BPMGMT03/03
3
RE030 1.75/2.1V 180 mA Dual Mode LDO Regulator
2706BPMGMT03/03
Absolute Maximum Ratings
*
Electrical Specifications
(1)
T
J
= -20
C to 125
C, V
BAT1A
/V
BAT1AA
= 3V to 5.5V unless otherwise specified, output capacitance = 2.2 F.
Analog Signals ....................................... -0.3V to 6.5V
*NOTICE:
Stresses beyond those listed under "Absolute Maxi-
mum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or other conditions
beyond those indicated in the operational sections of
this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may
affect device reliability.
Digital Signals......................................... -0.3V to 5.5V
Output Current................................... Internally limited
Junction Temperature ..........................-20
C to 150
C
Table 1. Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V
BAT1A
/V
BAT1AA
Operating Supply Voltage
3
5.5
V
V
SAUVC
Auxiliary Operating Supply
Voltage
2.4
2.5
2.6
V
T
J
Temperature Range
-20
125
C
Full Power Mode
V
COREA
/V
COREAA
Output Voltage
2.1V programmed
2.04
2.1
2.16
V
2.01V programmed
1.96
2.01
2.06
1.88V programmed
1.82
1.88
1.94
1.75V programmed
1.7
1.75
1.8
I
COREA
/I
COREAA
Output Current
180
mA
I
QQ
Quiescent Current
70
A
V
DC
Line Regulation
I
COREA
/I
COREAA
= 180 mA
2
3
mV
V
TRAN
Transient Line Regulation
I
COREA
/I
COREAA
= 180 mA
rise time = fall time = 5 s
2
3
mV
V
DC
Load Regulation
10% to 90% of max I
COREA
/I
COREAA
;
2
3
mV
V
TRAN
Transient Load Regulation
10% to 90% of max I
COREA
/I
COREAA
;
rise time = fall time = 5 s
5
7
mV
4
RE030 1.75/2.1V 180 mA Dual Mode LDO Regulator
2706BPMGMT03/03
PSRR
Power Supply Rejection Ratio
at Full Load
V
BAT1A
/
V
BAT1AA
= 3V
@100 Hz
-63
dB
@1 kHz
-63
dB
@20 kHz
-49
dB
@100 kHz
-35
dB
V
BAT1A
/
V
BAT1AA
= 4.25V
@100 Hz
-64
dB
@1 kHz
-64
dB
@20 kHz
-56
dB
@100 kHz
-43
dB
V
BAT1A
/
V
BAT1AA
= 5.5V
@100 Hz
-61
dB
@1 kHz
-61
dB
@20 kHz
-56
dB
@100 kHz
-43
dB
V
N
(2)
Output Noise
Bandwidth = 10 Hz to 100 kHz;
I
COREA
/I
COREAA
= 180 mA
77
100
V
RMS
T
R
Rise Time
100% of I
COREA
/I
COREAA
;
10% to 90% of V
COREA
/V
COREAA
60
s
I
SD
Shut Down Current
1
A
I
CC
Short-circuit Current
330
400
mA
Low Power Mode
V
COREA
/V
COREAA
Output Voltage
1.8V programmed
1.7
1.8
1.9
V
2V programmed
1.9
2
2.1
I
COREA
/I
COREAA
Output Current
5
mA
I
QQ
Quiescent Current
15
A
V
DC
Line Regulation
I
COREA
/I
COREAA
= 5 mA
2
3
mV
V
TRAN
Transient Line Regulation
I
COREA
/I
COREAA
= 5 mA
rise time = fall time = 5 s
2
3
mV
V
DC
Load Regulation
10% to 90% of max I
COREA
/I
COREAA
2
5
mV
V
TRAN
Transient Load Regulation
10% to 90% of max I
COREA
/I
COREAA
;
rise time = fall time = 5 s
4
6
mV
Table 1. Electrical Characteristics (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit
5
RE030 1.75/2.1V 180 mA Dual Mode LDO Regulator
2706BPMGMT03/03
Notes:
1. Obtained by considering the parasitics of a TFBGA100 Package.
2. Obtained by using BG019 as reference voltage generator.
PSRR
Power Supply Rejection Ratio
at Full Load
V
BAT1A
/
V
BAT1AA
= 3V
@100 Hz
-69
dB
@1 kHz
-69
dB
@20 kHz
-66
dB
@100 kHz
-52
dB
V
BAT1A
/
V
BAT1AA
= 4.25V
@100 Hz
-57
dB
@1 kHz
-57
dB
@20 kHz
-57
dB
@100 kHz
-53
dB
V
BAT1A
/
V
BAT1AA
= 5.5V
@100 Hz
-44
dB
@1 kHz
-44
dB
@20 kHz
-45
dB
@100 kHz
-48
dB
V
N
(2)
Output Noise
Bandwidth = 10 Hz to 100 kHz;
I
COREA
/I
COREAA
= 5 mA
110
150
V
RMS
T
R
Rise Time
100% of I
COREA
/I
COREAA
;
10% to 90% of V
COREA
/V
COREAA
270
s
I
SD
Shut Down Current
1
A
I
CC
Short-circuit Current
330
400
mA
Table 1. Electrical Characteristics (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit
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