AS1359 austriamicrosystems AG, AS1359 Datasheet
AS1359
Manufacturer Part Number
AS1359
Description
(AS1358 / AS1359) High-PSRR Low Dropout Regulators
Manufacturer
austriamicrosystems AG
Datasheet
1.AS1359.pdf
(2 pages)
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A S 1 3 5 8 / A S 1 3 5 9
1 5 0 m A / 3 0 0 m A , U l t r a - L o w - N o i s e , H i g h - P S R R
L o w D r o p o u t R e g u l a t o r s
1 General Description
The AS1358/AS1359 are ultra-low-noise, low-dropout
linear regulators specifically designed to deliver up to
150/300mA continuous output current, and can achieve
a low 140mV dropout for 300mA load current. The LDOs
are designed and optimized to work with low-cost, small-
capacitance ceramic capacitors.
The devices are available as the standard products
listed in
Table 1. Standard Products
An integrated P-channel MOSFET pass transistor allows
the devices to maintain extremely low quiescent current
(40µA).
The AS1358/AS1359 uses an advanced architecture to
achieve ultra-low output voltage noise of 9µV
power-supply rejection-ratio of better than 80dB (up to
10kHz).
The AS1358/AS1359 requires only 1µF output capacitor
for stability at any load. When the LDO is disabled, cur-
rent consumption drops below 500nA.
The devices are available in a TSOT23 5-pin package.
Figure 1. Typical Application Circuit
www.austriamicrosystems.com
AS1358
AS1359
Model
Input
2 to 5.5V
Table
C
1µF
On
Off
IN
Load Current
1.
150mA
300mA
SHDNN
GND
IN
2
3
1
AS1358/
AS1359
Preset – 1.5 to 4.5V
Preset – 1.5 to 4.5V
Output Voltage
5
OUT
4
BYPASS
RMS
C
BYPASS
10nF
and a
Revision 1.00
1.5 to 4.5V
C
1µF
OUT
Output
2 Key Features
3 Applications
The devices are ideal for mobile phones, wireless
phones, PDAs, handheld computers, mobile phone
base stations, Bluetooth portable radios and accesso-
ries, wireless LANs, digital cameras, personal audio
devices, and any other portable, battery-powered appli-
cation.
!
!
!
!
!
!
!
!
!
!
!
Preset Output Voltages: 1.5 to 4.5V (in 50mV steps)
Output Noise: 9µV
Power-Supply Rejection Ratio: 92dB @ 1kHz
Low Dropout: 140mV @ 300mA Load
Stable with 1µF Ceramic Capacitor for any Load
Guaranteed 150/300mA Output
1.25V Internal Reference
Extremely-Low Quiescent Current: 40µA
Excellent Load/Line Transient
Overcurrent and Thermal Protection
TSOT23 5-pin Package
SHDNN
GND
RMS
IN
1
2
3
@ 100Hz to 100kHz
AS1358/
AS1359
5 OUT
4 BYPASS
P r o d u c t B r i e f
1 - 2
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AS1359 Summary of contents
Page 1
... The AS1358/AS1359 requires only 1µF output capacitor for stability at any load. When the LDO is disabled, cur- rent consumption drops below 500nA. The devices are available in a TSOT23 5-pin package. ...
Page 2
... AS1358/AS1359 Product Brief Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. www.datasheet4u.com All products and companies mentioned are trademarks or registered trademarks of their respective companies. ...