AN8018SA Ver la hoja de datos (PDF) - Panasonic Corporation

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Fabricante

AN8018SA

1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC

Panasonic Corporation 

Voltage Regulators

s Terminal Equivalent Circuits (continued)

Pin No.

Equivalent circuit

6

VCC

FB1 OSC PWM

0.2 V

6

7

VCC

7

AN8018SA

Description

I/O

DT1:

I

The pin for setting channel 1 output maximum

duty ratio.

If this terminal is set at a voltage of 0.20 V or less,

FB1 terminal becomes low-level voltage and the

protective function for channel 1 output short-

circuit will stop (Unlatch function).

Out1:

O

The pin is open-collector type output terminal.

The absolute maximum rating of output current is

+50 mA.

8

GND:



Grounding terminal

8

9

VCC:



9

The supply voltage application terminal

Use the operating supply voltage in the range of

1.8 V to 14 V.

10

Out2:

O

VCC

The pin is push-pull type output terminal.

RB2

The absolute maximum rating of output source

current is −50 mA.

ISO(OUT)

10

The absolute maximum rating of output sink cur-

rent is +80 mA.

A constant current output with less fluctuation

30 kΩ

with power supply voltage and dispersion can be

obtained by the resistor externally attached to RB2

pin.

ISO(OUT)2 = 68 ×

VRB2

RB2

[A]

11

VCC

RB2:

I

The pin for connecting a resistor for setting chan-

nel 2 output current.

Use a resistance value in the range of 180 Ω to 1.1

120 Ω

Out2

kΩ.

The terminal voltage is 0.36 V (at RB2 = 820 Ω).

11

7

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