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AS3675 Datasheet(PDF) 10 Page - ams AG

Part # AS3675
Description  Flexible Lighting Management Unit
PDF  81 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3675 Datasheet(HTML) 10 Page - ams AG

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www.austriamicrosystems.com/AS3675
1v3
9 - 80
AS3675
Datasheet - D e ta i l e d D e s c r i p t i o n
8 Detailed Description
8.1
Analog LDO
The LDO is a general purpose LDO and the output pin is shared with the general purpose input (GPI) connected to
VANA/GPI. The design is optimized to deliver the best compromise between quiescent current and regulator perfor-
mance for battery powered devices.
Stability is guaranteed with ceramic output capacitors (of 1µF ±20% (X5R) or 2.2µF +100/-50%(Z5U). The low ESR of
these capacitors ensures low output impedance at high frequencies. The low impedance of the power transistor
enables the device to deliver up to 150mA even at nearly discharged batteries without any decrease in performance.
The LDO is off by default after start-up.
Figure 11. Analog LDO Block Diagram
Table 5. Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
VBAT
Supply Voltage
Range
3.0
5.5
V
RON
On Resistance
@150mA, full operating temperature range
1.0
Ω
VDROPOUT
Dropout Voltage
@150mA, ldo_ana_lpo (see page 10)= 0
150
mV
@50mA, ldo_ana_lpo= 0
50
mV
@5mA, ldo_ana_lpo= 1
500
mV
ION
Supply Current
Without load
50
µA
Without load, ldo_ana_lpo= 1
ldo_ana only
3
With 150mA load
150
IOFF
Shutdown Current
Without load
100
nA
tstart
Start-up Time
200
µs
Vout_tol
Output Voltage
Tolerance
-3
+3
%
VOUT
Output Voltage
VBAT > 3.0V and IOUT=150mA
1.8
2.85
V
Full Programmable Range
1.8
3.35
V
ILIMIT
1
LDO Current Limit
ldo_ana_lpo= 0
Pin VANA. LDO acts as current source if the
output current exceeds ILIMIT.
300
450
2
mA
LDO Current Limit
ldo_ana_lpo= 1
VBAT-VANA
≥0.2V
4
8
mA




AS3675



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