STV-376-E01 STMICROELECTRONICS [STMicroelectronics], STV-376-E01 Datasheet - Page 7

• Manufacturer Part Number: STV-376-E01
• Description: Ultra-low power laser motion sensor for laser mouse applications
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VT5376
2
2.1
Table 2.
Note:
2.2
Table 3.
Total @ ITop
(chip + Laser/LED)
Total chip @Vbat
Total
@Vtop/Vbat/Dvdd/
Avdd (1.8V)
Chip + Laser/LED
1
2
Power supply options and power consumption
The sensor includes a DCDC controller to supply the laser / LED. This allows the overall
sensor system to operate from a single AA or AAA battery supply voltage (from 1.6V down
to 1V), allowing for a simple and low power / low cost system design. Two power supply
schemes can be used.
Low cost application
The internal DCDC controller and voltage regulators are used so that the overall application
can be supplied from a single AA/AAA battery cell, without the need for an external step-up
convertor device. This approach is extremely economical.
Typical power supply and power consumption
DCDC efficiency from single battery cell to Vtop (typical 2.2V) is around 70%.
Maximum load on Vtop is 25mA
External supply application
In this instance, the internal DCDC controller and voltage regulators are turned off and
bypassed. The sensor then needs to be supplied with a single regulated 1.8V +/- 0.1V.
Power supply and typical power consumption
4000 fps
4000 fps
0.04 mA
5.8 mA
5.8 mA
2000 fps
2000 fps
0.04 mA
3.5 mA
3.5 mA
Run
Run
1000 fps
1000 fps
0.04 mA
2.4 mA
2.4 mA
Power supply options and power consumption
0.04 mA
0.3 mA
0.3 mA
IDLE1
IDLE1
0.15 mA
0.04 mA
0.15 mA
IDLE2
IDLE2
0.04 mA
SLEEP
SLEEP
0.1 mA
0.1 mA
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