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AS3677 Datasheet(PDF) 10 Page - ams AG

Part # AS3677
Description  Triple Channel Lighting Management Unit with DCDC step/up, ALS, 2xDLS(=DBC) and RGB Driver
PDF  68 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3677 Datasheet(HTML) 10 Page - ams AG

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AS3677
Datasheet - D e ta i l e d D e s c r i p t i o n
8 Detailed Description
8.1
LDO
The LDO is a general purpose LDO and the output pin connected to VANA and intended to power an external light
sensor. Stability is guaranteed with ceramic output capacitors of 100nF ±20% (X5R).
The LDO is off by default after start-up.
Figure 12. LDO Block Diagram
8.1.1
LDO Registers
Table 4. Electrical Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
ILOAD
Output current
0
10
mA
RON
On Resistance
10
25
Ω
VDROPOUT
Dropout Voltage
250
mV
ION
Supply Current
Without load
19
µA
tstart
Start-up Time
200
µs
Vout_tol
Output Voltage
Tolerance
-3
+3
%
VOUT
Output Voltage
VBAT > 3.0V
1.8
2.75
V
Full Programmable Range
1.8
3.35
V
Table 5. Reg control
Register
Addr: 00
Reg control
This register enables/disables the LDOs, Charge Pumps, Charge Pump LEDs,
current sinks, the Step Up DC/DC Converter, and low-power mode.
Bit
Bit Name
Default Access
Description
0
ldo_on
0R/W
0
LDO is switched off
1
LDO is switched on


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