ISP1102 데이터 시트보기 (PDF) - Philips Electronics

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ISP1102

Advanced Universal Serial Bus transceivers

Philips Electronics 

Philips Semiconductors

ISP1102

Advanced USB transceiver

7.4 Power supply input options

The ISP1102 has two power supply input options.

Internal regulator — pin VCC(5.0) is connected to 4.0 to 5.5 V. The internal regulator

is used to supply the internal circuitry with 3.3 V (nominal). The Vreg(3.3) pin becomes

a 3.3 V output reference.

Regulator bypass — pins VCC(5.0) and Vreg(3.3) are connected to the same supply.

The internal regulator is bypassed and the internal circuitry is supplied directly from

pin Vreg(3.3). The voltage range is 3.0 to 3.6 V to comply with the USB specification.

The supply voltage range for each input option is specified in Table 8.

Table 8: Power supply input options

Input option VCC(5.0)

Vreg(3.3)

VCC(I/O)

Internal

regulator

supply input for internal voltage reference output supply input for digital

regulator (4.0 to 5.5 V) (3.3 V, 300 µA)

I/O pins (1.65 V to 3.6 V)

Regulator

bypass

connected to Vreg(3.3)

with maximum voltage

drop of 0.3 V

(2.7 to 3.6 V)

supply input

(3.0 V to 3.6 V)

supply input for digital

I/O pins (1.65 V to 3.6 V)

9397 750 11228

Product data

Rev. 03 — 02 September 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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