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PDF AS1352 Data sheet ( Hoja de datos )
| Número de pieza | AS1352 | |
| Descripción | Programmable Dual LDO | |
| Fabricantes | austriamicrosystems AG | |
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AS1352
Programmable Quad LDO
Data Sheet
1 General Description
The AS1352 is a high-performance quad CMOS low-
dropout voltage regulator in a single QFN 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 reduc-
ing development times and costs significant. Factory
trimmed versions for full-production 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 AS1352 is available in a 12-pin QFN 4x4 package
and a 16-pin QFN 3x3 package.
2 Key Features
! 4 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: ±2%
! 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: 225µA
! 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
! Package Types
- 12-pin QFN 4x4
- 16-pin QFN 3x3
Figure 1. Pinout Assignments (Top View)
EN3 EN4 REF
12 11 10
EN2 1
EN1 2
VDD 3
AS1352
12-pin QFN
4x4
9 GND
8 VDD
7 VOUT4
456
VOUT1 VOUT2 VOUT3
13 GND
(Exposed Pad)
3 Applications
The AS1352 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.
EN2 EN3 EN4 REF
16 15 14 13
EN1 1
12 GND
VDD 2
VDD 3
AS1352
16-pin QFN
3x3
11 GND
10 VDD
VDD 4
9 VDD
5678
VOUT1 VOUT2 VOUT3 VOUT4
www.austriamicrosystems.com
Revision 1.31
1 - 10
1 page  
AS1352
Data Sheet - Application Information
7 Application Information
Figure 3. Typical AS1352-uxyz Application
VDD
3V
VDD
Microprocessor
EN1
EN2
EN3
EN4
GND
GND
AS1352-7BC0
VOUT1
VOUT2
VOUT3
2.5V
1µF ±20% (X5R)
2.2µF +100/-50%
(Z5U)
VPERI
CMOS
Sensor
2.9V
1µF ±20% (X5R)
2.2µF +100/-50%
(Z5U)
VCORE
3.0V
1µF ±20% (X5R)
2.2µF +100/-50%
(Z5U)
VPERI
Camera
IC
VOUT4
1.8V
1µF ±20% (X5R)
2.2µF +100/-50%
(Z5U)
VCORE
REF
100nF (Improved Noise Performance)
One-Time Programming Procedure Output Voltages
The four LDOs can be programmed and burned to any output voltage between 1.8V and 3.3V in steps of 0.1V. Cus-
tomers can burn the desired output voltages onsite using the austriamicrosystems programming board.
Furthermore, the AS1352 is available in pre-programmed versions with fixed output voltages (see Ordering Information
on page 9).
www.austriamicrosystems.com
Revision 1.31
5 - 10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AS1352.PDF ] | |
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