TJ1509AD-12 HTC [HTC Korea TAEJIN Technology Co.], TJ1509AD-12 Datasheet

TJ1509AD-12

Manufacturer Part Number

TJ1509AD-12

Description

150kHz, 2A PWM Buck DC/DC Converter

Manufacturer

HTC [HTC Korea TAEJIN Technology Co.]

Datasheet

1.TJ1509AD-12.pdf (8 pages)

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Mar. 2010 - R1.3

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 26V

● 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.

1.23V to 18V+4%

output version

- 1 -

PIN DESCRIPTION

ORDERING INFORMATION

TJ1509AD-ADJ

TJ1509AD-3.3

TJ1509AD-5.0

TJ1509AD-12

Pin No

5~8

Device

Function

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 TJ1509AD-12

TJ1509AD-12 Summary of contents

Page 1

... SOP-8 PKG PIN DESCRIPTION Pin No Function 1 Vin Operating voltage input 2 Vout Switching output 3 FB Output voltage feedback control 4 SD ON/OFF Shutdown 5~8 Ground Ground ORDERING INFORMATION Device Marking TJ1509AD-ADJ TJ1509A ADJ TJ1509AD-3.3 TJ1509A 3.3 TJ1509AD-5.0 TJ1509A 5.0 TJ1509AD-12 TJ1509A TJ1509A Description Package SOP-8 HTC ...

Page 2

PWM Buck DC/DC Converter Typical Application Circuit C 470uF/30V 470uF/30V C 470uF/30V 3 1 TJ1509A TJ1509A TJ1509A TJ1509A ...

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 - 4 - TJ1509A HTC ...

Page 5

PWM Buck DC/DC Converter TYPICAL PERFORMANCE CHARACTERISTICS TJ1509A Output Voltage vs. Output Current (Vin=12V, Vout=5V, Io=2A) 4.99 4.98 4.97 4.96 4.95 4.94 4.93 4.92 0 0.5 Iout[A] TJ1509A Output Voltage vs. Output Current (Vin=15V, Vout=5V, Io=2A) 4.98 4.97 ...

Page 6

PWM Buck DC/DC Converter TYPICAL PERFORMANCE CHARACTERISTICS TJ1509A Efficiency vs. Temperature ( V =12V out TJ1509A Saturation Voltage vs. Temperature ( V =12V =12V, No Load, Von/off=0V(Switch ON), ...

Page 7

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

Page 8

PWM Buck DC/DC Converter FUNCTION DESCRIPTION Pin Functions +VIN This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be present at this pin to minimize voltage transients and to supply ...

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