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PDF AS1355 Data sheet ( Hoja de datos )
| Número de pieza | AS1355 | |
| Descripción | Triple LDO | |
| Fabricantes | ams | |
| Logotipo |  |
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AS1355
300mA, Triple LDO
1 General Description
The AS1355 is a high-performance triple CMOS low-dropout voltage
regulator in a single QFN package. The efficient set of
programmable power supplies is optimized to deliver the best
compromise between quiescent current and regulator performance
for mobile phones, PDAs, MP3 players, and other battery powered
devices.
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 capacitors 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 networks.
The AS1355 is available in a 16-pin QFN 3x3 package.
2 Key Features
3 Independent Voltage Regulators with Shutdown
Output Current: 300mA each LDO
Programmable Output Voltage Range: 1.25V to 3.6V in 50mV
Steps
Accuracy: ±1.0%
PSRR: 70dB at 1kHz, 60dB at 100kHz
Load Regulation: 3mV (0 to 300mA)
Supply Range: 2.3V to 5.5V
0.1V Dropout Voltage @ Iload = 200mA
Shutdown Current: 1µA
Supply Current Without Load: 160µA
Softstart for Low Inrush Current
Stable with low ESR Ceramic Capacitors from 1µF to 4.7µF
Low Noise: 40µV rms @10Hz to 100kHz Bandwidth
Thermal Protection
Over-Current Protection
Temperature Range: -40°C to +85°C
Packages:
- 16-pin QFN 3x3
- 16-pin TQFN 3x3
3 Applications
The AS1355 is ideal for cordless and mobile phones, MP3 players,
CD and DVD players, PDAs, hand-held computers, digital cameras,
and any other hand-held battery-powered device.
Figure 1. AS1355 - Typical Application Diagram
+5V VDD1
VDD2
1µF
VDD3
VDDA
EN1
µP EN2
EN3
AS1355
VOUT1
3.3V
1µF
VOUT2
1.8V
1µF
VOUT3
1.5V
1µF
REF
CREF = 100nF
(Improved Noise Performance)
GND
www.ams.com/LDOs/AS1355
Revision 1.3
1 - 12
1 page  
AS1355
Datasheet - Typical Operating Characteristics
7 Typical Operating Characteristics
VDD = 4V, VOUT = 3.3V, COUT = 1µF, TAMB = +25°C (unless otherwise specified);
Figure 3. Load Regulation; VOUT vs. IOUT
3.36
3.34
3.32
3.3
3.28
3.26
3.24
0
50 100 150 200 250
Output Current (mA)
Figure 5. Output Voltage vs. Temp.; IOUT = 1mA
3.36
300
3.34
3.32
3.3
3.28
3.26
3.24
-45 -30 -15 0 15 30 45 60 75 90
Temperature (°C)
Figure 7. Startup; no Load, no CREF
Figure 4. Line Regulation; VOUT vs. VIN
1.84
1.83
1.82
1.81
1.8
1.79
1.78
1.77
1.76
2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Figure 6. Quiescent Current vs. Temperature
240
220
200
180
160
140
120
100
80
-45 -30 -15 0 15 30 45 60 75 90
Temperature (°C)
Figure 8. Startup; RLOAD = 11Ω, no CREF
50µs/Div
www.ams.com/LDOs/AS1355
Revision 1.3
50µs/Div
5 - 12
5 Page 
AS1355
Datasheet - Ordering Information
11 Ordering Information
The devices are available as the standard products shown in Table 4.
Table 4. Ordering Information
Ordering Code
AS1355-BQFT-WGD
Marking
ASSG
AS1355-BQFT-WWW
ASSV
AS1355-BQFT-WWD2
ASTD
AS1355-BQFT-xyz*
____
Output
VOUT1 = 3.3V
VOUT2 = 1.8V
VOUT3 = 1.5V
VOUT1 = 3.3V
VOUT2 = 3.3V
VOUT3 = 3.3V
VOUT1 = 3.3V
VOUT2 = 3.3V
VOUT3 = 1.5V
VOUT1*
VOUT2*
VOUT3*
Description
300mA, Triple LDO
Delivery Form
Tape and Reel
Package
16-pin QFN 3x3
300mA, Triple LDO
Tape and Reel
16-pin QFN 3x3
300mA, Triple LDO
Tape and Reel 16-pin TQFN 3x3
300mA, Triple LDO
Tape and Reel
16-pin QFN 3x3
* These devices are available in factory-set output voltages from 1.25V to 3.6V in 100mV increments. Choose the desired VOUT suffix from
Table 5 and insert it instead of “xyz” in the part number.
On request also non-standard devices with output voltages between 1.25V and 3.6V in 50mV steps are available.
Table 5. Output Voltage Suffix Guide
Suffix
A
B
C
D
E
F
G
H
I
Min
Typ Max
1.25
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Suffix Min Typ Max
J 2.1
K 2.2
L 2.3
M 2.4
N 2.5
O 2.6
P 2.7
Q 2.8
R 2.9
Suffix
S
T
V
W
X
Y
Z
2
Min Typ Max
3.0
3.1
3.2
3.3
3.4
3.5
3.6
thin QFN
Note: All products are RoHS compliant and ams green.
Buy our products or get free samples online at www.ams.com/ICdirect
Technical Support is available at www.ams.com/Technical-Support
For further information and requests, email us at [email protected]
(or) find your local distributor at www.ams.com/distributor
www.ams.com/LDOs/AS1355
Revision 1.3
11 - 12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AS1355.PDF ] | |
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