AS1323-27 AMSCO [austriamicrosystems AG], AS1323-27 Datasheet

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AS1323-27

Manufacturer Part Number
AS1323-27
Description
1.6uA Quiescent Current, Single Cell, DC-DC Step-Up Converter
Manufacturer
AMSCO [austriamicrosystems AG]
Datasheet
A S 1 3 2 3
1.6µA Quiescent Current, Single Cell, DC-DC Step-Up Converter
1 General Description
The AS1323 high-efficiency step-up DC-DC converter
was designed specifically for single-cell, battery-pow-
ered devices where lowest quiescent current and high
efficiency are essential.
The compact device is available in three fixed-voltage
variations and is perfect for a wide variety of applications
where extremely-low quiescent currents and very-small
form factors are critical.
The devices are available as the standard products
shown in
page
Table 1. Standard Products
Integrated boot circuitry ensures start-up even with very-
high load currents.
The true output disconnect feature completely discon-
nects the output from the battery during shutdown.
The device is available in a TSOT23-5 pin package.
Figure 1. Typical Operating Circuit
www.austriamicrosystems.com
AS1323-27
AS1323-30
AS1323-33
Model
12.
Table
10µF
1. See also
Fixed Output Voltage
SHDNN
V
BATT
1
3
2.7V
3.0V
3.3V
Ordering Information on
AS1323
10µH
5
LX
2
V
4
V
SS
OUT
TSOT23-5
TSOT23-5
TSOT23-5
Package
10µF
Revision 1.02
2 Key Features
3 Applications
The devices are ideal for single-cell portable devices
including mobile phones, MP3 players, PDAs, remote
controls, personal medical devices, wireless transmitters
and receivers, and any other battery-operated, portable
device.
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1.6µA Quiescent Current
Input Voltage Range: 0.75 to 2V
Up to 100mA Output Current
Fixed Output Voltages: 2.7, 3.0 and 3.3V
Shutdown Current: 0.1µA
Output Voltage Accuracy: ±3%
Efficiency: Up to 85%
No External Diode or FETs Needed
Output Disconnect in Shutdown
Guaranteed 0.95V Start-Up Voltage
TSOT23-5 Package
SHDNN
V
BATT
V
SS
1
2
3
AS1323
5 LX
4 V
OUT
D a t a S h e e t
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Related parts for AS1323-27

AS1323-27 Summary of contents

Page 1

... Table 1. See also Ordering Information on page 12. Table 1. Standard Products Model Fixed Output Voltage AS1323-27 2.7V AS1323-30 3.0V AS1323-33 3.3V Integrated boot circuitry ensures start-up even with very- high load currents. The true output disconnect feature completely discon- nects the output from the battery during shutdown. ...

Page 2

... Normal operating mode. Output. This pin also supplies bootstrap power to the device OUT Inductor Connection. This pin is connected to the internal N-channel MOSFET switch 5 LX drain and P-channel synchronous rectifier drain. www.austriamicrosystems.com BATT AS1323 SHDNN OUT Description Revision 1. ...

Page 3

... AS1323 Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 3 and functional operation of the device at these or any other conditions beyond those indicated in istics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 4

... SDI completely disconnected (0V) during shutdown. OUT www.austriamicrosystems.com = V , SHDNN = OUT OUT(NOM) OUT LOAD Condition T = 25ºC AMB T = 25ºC, AMB R = 100Ω LOAD AS1323-27 AS1323-30 AS1323- 1.5V; BATT I = 45mA LOAD Programmed at 400mA V = 1.5V BATT OUT 3.3V 25ºC AMB OUT V = 1.5V 25ºC ...

Page 5

... AS1323 Data Sheet - Typical Operating Characteristics V = 3.3V 25° 10µ 10µH, I OUT IN OUT A Figure 3. Efficiency vs. Output Current 1. 0 Output Current (mA) Figure 5. Efficiency vs. Output Current ...

Page 6

... AS1323 Data Sheet - Figure 9. Minimum Input Startup Voltage vs. Temp. 1 0.9 0.8 0.7 0.6 0.5 -50 - Temperature (°C) www.austriamicrosystems.com Figure 10. Shutdown Current vs. Temperature 1000 100 10 1 0.1 100 125 -50 -25 0 Revision 1. ...

Page 7

... Data Sheet - Detailed Description The AS1323 is a compact, high-efficiency, step-up DC-DC converter guaranteed to start up with voltages as low as 0.95V, and operate with an input voltage down to 0.75V. Consuming only 1.6µA of quiescent current, the device ...

Page 8

... Data Sheet - Application Information Figure 12. Typical Application Inductor Selection The control scheme of the AS1323 allows for a wide range if inductor values. A 10µH inductor should be sufficient for most applications (see Figure 12). ...

Page 9

... PC Board Layout Considerations The AS1323 has been specially designed to be tolerant to PC board parasitic inductances and resistances. However, to achieve maximum efficiency a careful PC board layout and component selection is vital. Note: For the optimal performance the IC’s VSS and the ground leads of the input and output capacitors must be kept less than 5mm apart using a ground plane ...

Page 10

... AS1323 Data Sheet 10 Package Drawings and Markings The device is available in an TSOT23-5 package. Figure 13. TSOT23-5 Package Symbol Min Typ A A1 0.01 0.05 A2 0.84 0.87 b 0.30 b1 0.31 0.35 c 0.12 0.15 c1 0.08 0.13 D 2.90BSC E 2.80BSC E1 1.60BSC e 0.95BSC e1 1.90BSC Notes: 1. Dimensioning and tolerancing conform to ASME Y14.5M - 1994. 2. Dimensions are in millimeters. 3. Dimension D does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, and gate burrs shall not exceed 0 ...

Page 11

... AS1323 Data Sheet - Tape and Reel Pin1 Orientation Figure 14. Tape&Reel Pin1 Orientation Top, Through View TSOT23-5 www.austriamicrosystems.com User direction of feed TSOT23-5 TSOT23-5 TSOT23-5 Revision 1. ...

Page 12

... Data Sheet - Ordering Information The device is available as the standard products shown in Table 5. Ordering Information Model Marking AS1323-BTTT-27 ASJN AS1323-BTTT-30 ASMP AS1323-BTTT-33 ASMQ www.austriamicrosystems.com Table 5. Description High-efficiency step-up DC-DC converter, 2.7V fixed output High-efficiency step-up DC-DC converter, 3.0V fixed output High-efficiency step-up DC-DC converter, 3 ...

Page 13

... AS1323 Data Sheet - 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, trans- lated, stored, or used without the prior written consent of the copyright owner. ...

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