L2800(Old_V) データシートの表示（PDF） - Unisonic Technologies

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L2800
(Rev.:Old_V)

SWITCHING REGULATOR CONTROLLER(LOW VOLTAGE)

Unisonic Technologies 

UTC L2800 LINEAR INTEGRATED CIRCUIT

PIN DESCRIPTION

PIN NO. SYMBOL I/O

1

-IN

I

2

SCP

-

3

VCC

-

4

BR/CTL

I

5

OUT

O

6

GND

-

7

OSC

-

8

FB

O

DESCRIPTION

Error amplifier inverting input pin

Soft start and SCP setting capacitor connection pin

Power supply pin

Output current setting and control pin

Totem-pole type output pin

Ground pin

Capacitor and resistor connection pin for setting the oscillation frequency

Error amplifier output pin

BLOCK DIAGRAM

Vcc

OSC

3

7

-IN 1

FB 8

Reference 0.6V

voltage supply

1.25V

-

0.1V

36kΩ

+ Error Amp.

0.5V

500Ω

Sawtooth

wave oscillator

0.1V

PWM

- Comp.

+

+

+

DTC 0.6V

Output drive

control circuit

0.3V

5 OUT

30kΩ

Soft start

SCP

6

GND

2

SCP

4

BR/CTL

ABSOLUTE MAXIMUM RATINGS (Ta=25℃)

PARAMETER

SYMBOL

Power Supply Voltage

Vcc

Output Source Current

IO+

Output Sink Current

IO-

Power Dissipation

SOP-8

PD

TSSOP-8

Storage Temperature

Tstg

Operating Temperature

Top

* When mounted on a 10cm square double-sided epoxy board.

RATINGS

16

-50

50

570*

580*

-55 ~ +125

-30 ~ +85

UNIT

V

mA

mA

mW

°C

°C

UTC UNISONIC TECHNOLOGIES CO., LTD. 2

QW-R121-010,A

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