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PDF AS1351 Data sheet ( Hoja de datos )
| Número de pieza | AS1351 | |
| Descripción | Programmable Dual LDO | |
| Fabricantes | austriamicrosystems AG | |
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austriamicrosystems
AS1351
Programmable Dual LDO
Product Brief
1 Generalwww.datasheet4u.com Description
The AS1351 is a high-performance dual CMOS low-
dropout voltage regulator in a single 3x3 package. The
efficient set of programmable power supplies is opti-
mized to deliver the best compromise between quies-
cent current and regulator performance for mobile
phones, PDAs, MP3 players, and other battery powered
devices.
The one-time-programmable (OTP) function provides
greater design flexibility by allowing for independent pro-
gramming of the output voltage for each regulator on-
site. The OTP function allows for fast prototyping as well
as full-production in the field. Factory trimmed versions
are also available.
Stability is guaranteed with ceramic output capacitors of
only 1µF (±20% – X5R) up to 4.7µF (±20% – X5R). The
low equivalent series resistance (ESR) of these capaci-
tors ensures low output impedance at high frequencies.
Regulation performance is excellent even under low
dropout conditions, when the power transistor has to
operate in linear mode.
The low-noise performance allows direct connection of
noise sensitive circuits without additional filtering net-
works.
The AS1351 is available in a 12-pin QFN 3x3 package
or in a wafer bumping package.
2 Key Features
! 2 Independent Voltage Regulators with Shutdown
! Output Current: 200mA each LDO
! One Time Programmable Output Voltage
(User- or Factory-Trimmed)
! Programmable Output Voltage Range: 1.8 to 3.3V in
0.1V Steps
! Accuracy: ±1.5%
! PSRR: 70dB at 1kHz, 40dB at 100kHz
! Line Regulation: ±2mV
! Load Regulation: ±0.6mV
! Supply Range: 3 to 5.5V
! 0.2V Dropout Voltage @ I = 200mA
! Shutdown Current: ≤1µA
! Supply Current Without Load: 125µA (typ)
! Softstart for Low Inrush Current
! Stable with low ESR Ceramic Capacitors from 1 to
4.7µF
! Low Noise – 40µV rms @10Hz to 100kHz Bandwidth
! Thermal Protection
! Over-Current Protection
! Temperature Range: -40 to +85°C
! Wafer Bumping
! QFN12 3x3, Pitch 0.8mm Package
Figure 1. Pinout Assignments (Top View)
3 Applications
The AS1351 is ideal for cordless and mobile phones,
MP3 players, CD and DVD players, PDAs, handheld
computers, digital cameras, and any other hand-held
battery-powered device.
N/C N/C REF
12 11 10
EN2 1
EN1 2
GND 3
AS1351
9 VDD
8 N/C
7 VDD
4
TRIM
56
VOUT1 VOUT2
13 GND (Exposed Pad)
© 1997-2005, austriamicrosystems AG, 8141 Unterpremstaetten, Austria-Europe. All Rights Reserved.
www.austriamicrosystems.com
Revision 1.1
1-2
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet AS1351.PDF ] | |
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