VT5376 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VT5376

Ultra-low power motion sensor for optical finger navigation and laser mice

STMicroelectronics 

VT5376

Power supply options and power consumption

2

Power supply options and power consumption

2.1

Power options

There are three different power options for the VT5376:

● 1.8V direct drive

● 2.2V to 3.3V external supply to Vtop

● one battery supply (1V to 1.6V) to Vbat

2.1.1

External supply (1.8V direct)

In this instance, the internal DCDC controller is bypassed and voltage regulators turned off.

The sensor should be supplied with a single regulated 1.8V +/- 0.1V (connected to DVDD,

AVDD, VBAT, VREG and VTOP).

2.1.2

External supply (2.2V to 3.3V)

With this option Vtop is to connected to an external 2.2V to 3.3V supply.

The internal DCDC controller is bypassed but the internal voltage regulator is on which

supplies the sensor with 1V8 (DVDD, AVDD, VBAT and VREG to be connected together).

2.1.3

One battery (1V to 1.6V)

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) without the need for an external step-up convertor device. This gives a simple and low

power/low cost system design.

Table 4.

Typical power supply and power consumption

Run

4000 fps

2000 fps

1000 fps

IDLE1

Total @ ITop

(sensor +

Laser/LED)

5.8 mA

3.5 mA

2.4 mA

0.3 mA

IDLE2

0.15 mA

SLEEP

0.1 mA

Note: 1 DCDC efficiency from single battery cell to Vtop (typical 2.2V) is around 70%.

2 Maximum load on Vtop is 25 mA

Doc ID 13939 Rev 4

7/31

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