VV6501 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

VV6501

VGA CMOS Color Image Sensor

STMicroelectronics 

Functional Description

VV6501

3.3 Power management

3.3.1

Voltage regulators

The power management block on the device avoids the requirement for any external system

regulators in a 5 V based camera product. The scheme is shown in Figure 19.

q Digital Regulator 1 - This 5 V to 3.3 V regulator uses an external bipolar transistor to supply

loads up to 200 mA. It is typically used to power the sensor digital logic and may also be used

to supply an external co-processor if required. This regulator is always on.

q Digital Regulator2 - This 3.3 V to 1.8 V regulator uses an external bipolar transistor to supply

loads up to 100 mA. This supply may be used for an external co-processor if required. This

regulator is controlled by the PDREG1V8 pin and must be switched off if not required.

q Audio Amp Regulator - This 5 V to 3.3 V regulator supplies the audio amplifier and the buffer

amplifier used to supply the reference to the microphone (Load 5 mA). It should be externally

decoupled with a 2.2 µF capacitor. For applications without audio this regulator may be

powered down via the SIF registers.

q Video Regulator - This 5 V to 3.3 V regulator supplies the analogue video circuitry. It should be

externally decoupled with a 2.2 µF capacitor.

Figure 19: Voltage regulator block diagram

VV6501

Digital

block

PDREG1V8

pdreg2

pdvidreg

pdaudreg

Video

block

Voltage

doubler

Audio

amplifier

Power management block V5V

5V 5V Bandgap

vbg

VBG

4-5.5V

1µF

6.8nF

5V Dig Reg1

vbg +

-

VBASE3V3

VDIG3V3

VDD

ZTX749

3v3

IO (3V3)

10µF

3V Dig Reg2

vbg +

pd -

5V VidReg

vbg +

pd -

VDD

VBASE1V8 1v8

VDIG1V8

co-

processor

ZTX749

core (1v8)

10µF

5V AudReg

vbg +

pd -

VID3V3

2.2µF

AUD3V3

2.2µF

24/60

Share Link: