NJM2367

Ver 2.1

- 1 -

5.5A HIGH POWER DC/DC CONVERTER CONTROLLER IC

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GENERAL DESCRIPTION

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PACKAGE OUTLINE

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FEATURES

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Operating Voltage

(7.5V to 40V)

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PWM form Switching Power Supply Control

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Internal High Power Transistor

5.5A (min.)

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Fixed Frequency Oscillator

72kHz (typ.)

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Internal Current Sense Amplifier

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Internal Under Voltage Lockout

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Internal Thermal Shutdown Circuit

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Bipolar Technology

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Package Outline

TO-22O(5PIN)

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BLOCK DIAGRAM

Oscillator

Thermal

Under Voltage

Standby Circuit

Error Amplifier

PWM Comparator

5.5A Power Transistor

Current Sense

Ratch Circuit

S Q

R

5

4

3

2

1

ON/OFF

Reference

VREF

VREF

Current Circh Transistor

Shutdown

Lockout

Voltage

Amplifier

The NJM2367 is a high power DC/DC converter controller

inducing basic function of DC/DC converter controller, which

consists precision reference voltage, fixed frequency

oscillator, high gain error amplifier, precision output switch,

cycle-by-cycle current limit, under voltage lockout, and

thermal shutdown circuit.

The NJM2367 is suitable for step-down converter with few

external parts, and realize low power stand-by mode.

PIN FUNCTION

3:GND

4:V

+

1 2 3 4 5

NJM2367TA2050

NJM2367TLA2050