1
Features
Low-noise Low Drop Out Voltage Regulator
2.6V Fixed Output Voltage
3V to 5.5V Supply Operation
160 mA Maximum Load Current
Less Than 46 A (max) Quiescent Current
Power-down Mode Consumption Less Than 1 A
More Than 60 dB (Typical) PSRR at 1 kHz
68 V
RMS
Output Noise
0.35 m CMOS Technology
Typical Application: Baseband Section Supply in Mobile Terminals
Description
RE023 is a Low Drop Out (LDO) voltage regulator macrocell with a fixed 2.6V output
voltage, rated for loads up to 160 mA. It is designed to be integrated with other analog
cells, digital logic, microcontrollers, 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 (bandgap voltage) is necessary for correct functionality.
The target reference voltage is 1.231V, delivered, for example, by BG019. Double
pads on the supply voltage V
BAT2B
/V
BAT2BB
and output voltage V
ANINTA
/V
ANINTAA
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 regulated input voltage on V
SAUVC
.
Remote sense terminal V
ANINTS
provides regulation at the load by connecting it to the
output terminal near a critical point to improve performance of the regulator (e.g., con-
necting them at the package pin by double-bonding, thus avoiding the bonding
resistance influence). A ceramic capacitor of 2.2 F connected from V
ANINTA
/V
ANINTAA
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.
vsauvc
vbg
on1
vanintc
vbat2b
vbat2bb
vaninta
vanintaa
vanints
gnd2
Embedded ASIC
Macrocell:
Power
Management for
Mobile
Terminals (PM)
RE023
Fixed 2.6V
160 mA
LDO Voltage
Regulator
Rev. 2702B-PMGMT02/03
3
RE023 Fixed 2.6V 160mA LDO Voltage Regulator
2702BPMGMT02/03
Absolute Maximum Ratings
*
Electrical Specifications
(1)
T
J
= -20
C to 125
C, V
BAT2B
/V
BAT2BB
= 3V to 5.5V unless otherwise specified, output capacitance = 2.2 F.
V
IN
.......................................................... -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 ..........................-40
C to 150
C
Table 1. Electrical Specifications
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V
BAT2B
/V
BAT2BB
Operating Supply Voltage
3
5.5
V
V
SAUVC
Auxiliary Operating Supply
Voltage
2.4
2.5
2.6
V
T
J
Junction Temperature Range
-20
125
C
V
ANINTA
/
V
ANINTAA
Output Voltage
2.5
2.6
2.7
V
I
ANINTA
/
I
ANINTAA
Output Current
160
mA
I
QQ
Quiescent Current
46
A
V
DC
Line Regulation
I
ANINTA
/I
ANINTAA
= 160 mA
2
3
mV
V
TRAN
Transient Line Regulation
I
ANINTA
/I
ANINTAA
= 160 mA
rise time = fall time = 5 s
4
7
mV
V
DC
Load Regulation
10% - 90% of max I
ANINTA
/I
ANINTAA
2
3
mV
V
TRAN
Transient Load Regulation
10% - 90% of max I
ANINTA
/I
ANINTAA
rise time = fall time = 5 s
5
10
mV
PSRR
Power Supply Rejection Ratio
at Full Load
V
BAT
= 3V
@100 Hz
-65
dB
@1 kHz
-60
dB
@20 kHz
-40
dB
@100 kHz
-30
dB
V
BAT
= 4.25V
@100 Hz
-60
dB
@1 kHz
-60
dB
@20 kHz
-50
dB
@100 kHz
-40
dB
V
BAT
= 5.5V
@100 Hz
-55
dB
@1 kHz
-55
dB
@20 kHz
-48
dB
@100 kHz
-40
dB
4
RE023 Fixed 2.6V 160mA LDO Voltage Regulator
2702BPMGMT02/03
Notes:
1. Obtained by considering the parasitics of a TFBGA100 Package.
2. Obtained by using BG019 as reference voltage generator.
V
N
Output Noise
(2)
Bandwidth: 10 Hz to 100 kHz
output current = 160 mA
68
81
V
RMS
T
R
Rise Time
100% of I
ANINTA
/I
ANINTAA
10% - 90% V
ANINTA
/V
ANINTAA
70
s
I
SD
Shut Down Current
1
A
I
CC
Short-circuit current
400
mA
Table 1. Electrical Specifications (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit
5
RE023 Fixed 2.6V 160mA LDO Voltage Regulator
2702BPMGMT02/03
Control Modes
All digital signals are referred to the supply voltage V
BAT2B/BAT2BB
.
Application
Example
A ceramic capacitor of 2.2 F with ESR between 20 m
and 250 m
connected from
V
ANINTA
/V
ANINTAA
to ground is needed as external compensation.
Figure 3. Application Example
Table 2. Truth Table
ON1
V
ANINTA
/V
ANINTAA
0
Power down (High-Z)
1
Power on, V
ANINTA
/V
ANINTAA
= 2.6V
Description
Min
Typ
Max
Units
Capacitor, C
L
1.8
2.2
2.6
F
Digital
Core
1.231V Bandgap
(e.g., BG019)
2.5V
2.5V Regulator
(e.g., RE031)
V
BAT2B
V
BAT2BB
V
ANINTA
V
ANINTAA
V
ANINTS
V
SAUVC
V
BG
ON1
V
ANINTC
Battery
Pack
GND2
C
L
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