TJ1509A HTC Korea TAEJIN Technology Co., TJ1509A Datasheet

TJ1509A

Manufacturer Part Number

TJ1509A

Description

150khz, 2a Pwm Buck Dc/dc Converter

Manufacturer

HTC Korea TAEJIN Technology Co.

Datasheet

1.TJ1509A.pdf (7 pages)

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2008 - Ver 1.0

FEATURES

● Output voltage: 3.3V, 5V, 12V and adjustable

● Adjustable version output voltage range,

● 150KHz +15% fixed switching frequency

● Voltage mode non-synchronous PWM control

● Thermal-shutdown and current-limit protection

● ON/OFF shutdown control input

● Operating voltage can be up to 22V

● Output load current: 2A

● SOP-8L packages

● Low power standby mode

● Built-in switching transistor on chip

● Moisture Sensitivity Level 3

APPLICATIONS

● Simple High-efficiency step-down regulator

● On-card switching regulators

● Positive to negative converter

● Negative Step-Up Converters

● Power Supply for Battery Chargers

DESCRIPTION

150kHz, 2A PWM Buck DC/DC Converter

The TJ1509A series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving

a 2A load without additional transistor component. Due to reducing the number of external component, the

board space can be saved easily. The external shutdown function can be controlled by logic level and then come

into standby mode.

The internal compensation makes feedback control have good line and load regulation without external design.

Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and

current limit is against over current operating of the output switch. If current limit function occurred and VFB is

down to 0.5V below, the switching frequency will be reduced.

The TJ1509A series operates at a switching frequency of 150KHz thus allowing smaller sized filter components

than what would be needed with lower frequency switching regulators. Other features include a guaranteed +4%

tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator

frequency.

The output version included fixed 3.3V, 5V, 12V, and an adjustable type.

The packages are available in a standard 8-lead SOP-8 package.

output version

1.23V to 18V+4%

PIN DESCRIPTION

ORDERING INFORMATION

TJ1509A-ADJ

TJ1509A-3.3

TJ1509A-5.0

TJ1509A-12

Pin No Function

5~8

Device

Ground

Vout

Vin

TJ1509A ADJ

TJ1509A 3.3

TJ1509A 5.0

TJ1509A 12

SOP-8 PKG

Operating voltage input

Switching output

Output voltage feedback control

ON/OFF Shutdown

Ground

Marking

Description

TJ1509A

Package

SOP-8

HTC

Related parts for TJ1509A

TJ1509A Summary of contents

Page 1

... Power Supply for Battery Chargers DESCRIPTION The TJ1509A series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 2A load without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by logic level and then come into standby mode ...

Page 2

... PWM Buck DC/DC Converter Typical Application Circuit C 470uF/30V 470uF/30V C 470uF/30V TJ1509A 4 5 TJ1509A 4 5 TJ1509A 4 5~8 in TJ1509A 220uF or IN5824 470uF/10V 220uF or IN5824 470uF/10V 220uF or IN5824 470uF/10V HTC ...

Page 3

... PWM Buck DC/DC Converter BLOCK DIAGRAM TJ1509A HTC ...

Page 4

... PWM Buck DC/DC Converter TJ1509A -ADJ TJ1509A -3.3V TJ1509A -5.0V TJ1509A -12V TJ1509A HTC ...

Page 5

... TJ1509A Efficiency v.s. Temperature ( V =12V out TJ1509A Saturation Voltage v.s. Temperature ( V =12V =12V, No Load, Von/off=0V(Switch ON), Von/off=5V(Switch OFF 2A TJ1509A Switch Current Limit v.s. Temperature VSD TJ1509A Supply Current v.s. Temperature TJ1509A Efficiency v.s. Temperature ( V =12V, V 3. out =12V ...

Page 6

... PWM Buck DC/DC Converter TYPICAL PERFORMANCE CHARACTERISTICS TJ1509A Threshold Voltage v.s. Temperature (Vcc=12V TJ1509A Frequency v.s. Temperature (Vcc=12V, Io=500mA, Vout=5V) TJ1509A Output Voltage v.s. Temperature (Vin=12V, Io=2A) TJ1509A ON/OFF Current v.s. ON/OFF Voltage =100mA) TJ1509A Feedback Current v.s. Temperature (Vin=12V) (Vcc=12V, Vout=5V, Vfb=1.3V) TJ1509A HTC ...

Page 7

... The data for these curves was taken with the TJ1509A (SOP-8 package) operating as a buck-switching regulator in an ambient temperature of 25℃ (still air). These temperature rise numbers are all approximate and there are many factors that can affect these temperatures ...

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