SCI7631MBA Просмотр технического описания (PDF) - Seiko Epson Corp

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SCI7631MBA

POWER SUPPLY IC - DC/DC Switching Regulators

Seiko Epson Corp 

SCI7630 Series

The SCI7630 series of CMOS switching regulators featuring built-in RC oscillators, the SCI7633 series re-

comprises nine series—the SCI7631, SCI7638 series quiring external crystal oscillators.

SCI7631, SCI7638 Series CMOS Switching Regulators

DESCRIPTION

The SCI7631, SCI7638 series of CMOS switching

regulators provide input voltage step-up and regulation

to a specified fixed voltage using an external coil. The

devices in these series incorporate precision, low-power

reference voltage generators and transistors for driving

an internal comparator. They feature low power con-

sumption, low operating voltages, voltage detection and

standby operation.

The devices offer a range of fixed output voltages, from

2.0 to 5.0V. The SCI7631 series features battery

backup and power-on clear, the SCI7638 series features

power-on clear and response compensation, the

SCI7638 series offer an output voltage temperature

characteristic for driving an LCD. They are available in

8-pin SOP3s.

FEATURES

• 0.9V (Min.) operating voltage

• 10µA (Typ.) maximum current consumption

• Standby operation

• 3µA (Typ.) standby current consumption

• 1.05 ±0.05V high-accuracy voltage detection

• Battery backup (available on SCI7631 series)

• On-chip RC oscillator

• Power-on clear (available on SCI7631 and SCI7638

series)

• Output voltage temperature characteristic for driving

an LCD (available on SCI7638 series)

• 8-pin SOP3

APPLICATIONS

• Fixed-voltage power supplies for battery-operated

equipment such as portable video cassette recorders,

video cameras and radios

• Power supplies for pagers, memory cards, calculators

and similar hand-held equipment

• Fixed-voltage power supplies for medical equipment

• Fixed-voltage power supplies for communications

equipment

• Power supplies for microcomputers

• Uninterruptable power supplies

• LCD panel supplies

LINE-UP

Device

Voltage

(V)

Input

Output

SCI7631MLA

2.4

SCI7631MBA 1.5

3.0

SCI7631MKA (0.9 min.) 3.5

SCI7631MAA

5.0

SCI7638MHA 1.5

2.2

SCI7638MLA (0.9 min.) 2.4

Multiplication

frequency

source

On-chip RC

oscillator

On-chip RC

oscillator

Voltage

detection

Power-on clear Battery backup

Response

compensation

Output voltage

temperature

characteristic

Package

SOP3-8pin

Yes

No

Yes

Yes

SOP3-8pin

No

SOP3-8pin

SOP3-8pin

–4.5 mV/˚C SOP3-8pin

No

Yes

–4.0 mV/˚C SOP3-8pin

SCI7000 Series

Technical Manual

EPSON

4–1

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