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RE023 Fiches technique(PDF) 1 Page - ATMEL Corporation

No de pièce RE023
Description  Embedded ASIC Macrocell: Power Management for Mobile Terminals (PM), RE023 Fixed 2.6V 160 mA LDO Voltage Regulator
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Fabricant  ATMEL [ATMEL Corporation]
Site Internet  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

RE023 Fiches technique(HTML) 1 Page - ATMEL Corporation

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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 µA (max) Quiescent Current
Power-down Mode Consumption Less Than 1 µA
More Than 60 dB (Typical) PSRR at 1 kHz
68µ V
RMS Output Noise
0.35 µm 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/VBAT2BB and output voltage VANINTA/VANINTAA 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 µF connected from V
ANINTA/VANINTAA
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-PMGMT–02/03


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