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PDF AS1329 Data sheet ( Hoja de datos )
| Número de pieza | AS1329 | |
| Descripción | DC-DC Step-Up Converters | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS1329 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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AS1329
Low Voltage, Micropower, DC-DC Step-Up Converters
1 General Description
The AS1329A, AS1329B and the AS1329C are synchronous, fixed
frequency, very high-efficiency DC-DC boost converters capable of
supplying 3.3V at 160mA from a single AA-supply. Compact size and
minimum external parts requirements make these devices perfect for
modern portable devices.
High-speed switching frequency (1.2MHz) and internally
compensated PWM current mode design provide highly-reliable DC-
DC conversion, especially when driving white LEDs. The converters
are available as the standard products listed in Table 1.
Table 1. Standard Products
Model
Light Load Switching
AS1329A
Medium Load
Automatic Powersave Operation
AS1329B
Light Load Automatic Powersave Operation
AS1329C
Continuous Switching
The devices contain two internal MOSFET switches: one NMOS
switch and one PMOS synchronous rectifier. Anti-ringing control
circuitry reduces EMI by damping the inductor in discontinuous
mode, and the devices exhibit extremely low quiescent current (<
1µA) in shutdown.
In shutdown mode the battery is connected directly to the output
enabling the supply of real-time-clocks. The AS1329 is available in a
6-pin TSOT-23 package.
Figure 1. Typical Application Diagram – Single Cell to 3.3V
Synchronous Boost Converter
2 Key Features
Low Start-Up Voltage: 0.85V
Output Range: 2.5V to 5.0V
Single-Cell Operation
Operating with coils down to 2.2µH
Delivers 160mA @ 3.3V (from Single AA Cell)
Delivers 220mA @ 5.0V (from Two AA Cells)
Delivers 570mA @ 3.3V (from Two AA Cells)
95% Efficiency
High-Speed Fixed-Frequency: 1.2MHz
Internal PMOS Synchronous Rectifier
Automatic Powersave Operation (AS1329A&B)
Continuous Switching at Light Loads (AS1329C)
Logic Controlled Shutdown (< 1µA)
6-pin TSOT-23 Package
3 Applications
The AS1329 is ideal for low-power applications where ultra-small
size is critical as in medical diagnostic equipment, hand-held
instruments, pagers, digital cameras, remote wireless transmitters,
MP3 players, LCD bias supplies, cordless phones, GPS receivers,
and PC cards.
L1
4.7µH
AA Battery
C1
10µF
On
Off
6
VIN
4
SHDNN
1 SW
AS1329
5
VOUT
2 GND
3
FB
R1
1.02MΩ
1%
R2
604kΩ
1%
C2
10µF
VOUT
3.3V
160mA
www.ams.com/DC-DC_Step-Up/AS1329
Revision 1.12
1 - 20
1 page  
AS1329
Datasheet - Typical Operating Characteristics
7 Typical Operating Characteristics
All measurements are performed with AS1329A, VOUT = 3.3V, TAMB = +25ºC, unless otherwise specified.
Parts used for measurements: L= 10µH (MOS6020-103ML), CIN and COUT = 10µF (GRM31CR70J106KA01L)
Figure 3. VOUT vs. Battery Voltage; IOUT = 10mA
3.5
3
2.5
2
1.5
1
0.5
0
0 0.5 1 1.5 2 2.5 3 3.5
Battery Voltage (V)
Figure 5. Startup Voltage vs. Output Current
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
0.9
0.8
0.7
0.1
Vout =3.3V
Vout =5.0V
1 10
Output Current (mA)
100
Figure 7. IOUT vs. VBATT; VOUT = 3.3V, 3% Tolerance
1000
900
800
700
600
500
400
300
200
100
0
0.5 1 1.5 2 2.5 3
Battery Voltage (V)
www.ams.com/DC-DC_Step-Up/AS1329
Figure 4. VOUT vs. Temperature; IOUT = 10mA
3.36
3.34
3.32
3.3
3.28
3.26
3.24
-50
-25 0 25 50 75
Temperature (°C)
100
Figure 6. Powersave threshold vs. Input Voltage
120
100
AS1329A
AS1329B
80
60
40
20
0
1 1.25 1.5 1.75 2 2.25 2.5
Battery Voltage (V)
Figure 8. IOUT vs. VBATT; VOUT = 5.0V, 3% Tolerance
900
800
700
600
500
400
300
200
100
0
0.5 1 1.5 2 2.5 3 3.5 4
Battery Voltage (V)
Revision 1.12
5 - 20
5 Page 
AS1329
Datasheet - Application Information
Figure 22. Single AA Cell to ±3V Synchronous Boost Converter
AA
Battery
On
Off
L1
4.7µH
C3
1µF
C1
4.7µF
6
VIN
4
SHDNN
1 SW
AS1329
5
VOUT
2 GND
3
FB
R1
1.02MΩ
1%
R2
750kΩ
1%
D1
C2
4.7µF
VOUT1
3V, 90mA
D2
C4
10µF
VOUT2
-3V, 10mA
Figure 23. Single AA Cell to 2.5V Synchronous Boost Converter
L1
4.7µH
D1
AA
Battery
C1
10µF
On
Off
6
VIN
4
SHDNN
1 SW
AS1329
2 GND
5
VOUT
R1
1.02MΩ
1%
3
FB
R2
1.02MΩ
1%
C2
10µF
VOUT
2.5V, 230mA
www.ams.com/DC-DC_Step-Up/AS1329
Revision 1.12
11 - 20
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AS1329.PDF ] | |
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