DC/DC Converter. YB1685 Datasheet

YB1685 Datasheet PDF, Equivalent


Part Number

YB1685

Description

2A 380KHz 32V PWM Buck DC/DC Converter

Manufacture

YOBON TECHNOLOGIES

Total Page 9 Pages
PDF Download
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YB1685 Datasheet
YB1685
2A 380KHz 32V PWM Buck DC/DC Converter
Description
The YB1685 is a 380 KHz fixed frequency
monolithic step down switch mode
regulator with a built in internal Power
MOSFET. It achieves 2A continuous output
current over a wide input supply range with
excellent load and line regulation. The
device includes a voltage reference,
oscillation circuit, error amplifier, internal
PMOS and etc.
The PWM control circuit is able to adjust
the duty ratio linearly from 0 to 100%. An
enable function, an over current protection
function and a short circuit protection
function are built inside. An internal
compensation block is built in to minimize
external component count.
The YB1685 serves as ideal power supply
units for portable devices.
Features
„ 2A Constant Output Current
„ 140mRDSON Internal Power PMOSFET
Switch
„ Up to 92% Efficiency Fixed 380KHz
Frequency
„ Wide 3.6V to 32V Input Voltage Range
„ Output Adjustable from 1.235V to 30V
„ Output Current Protection
„ Built in Frequency Compensation
„ Built in Thermal Shutdown Function
„ Built in Current Limit Function
„ SOP8 Package is Available
„ The Minimum Dropout up to 0.3V
„ Pb-free Package
Applications
„ Portable DVD
„ LCD Monitor / TV
„ Battery Charger
„ ADSL Modem
„ Telecom / Networking Equipment
Typical Application Circuit
YB1685 Rev.1.0
Figure 1: Typical Application Circuit
www.yobon.com.tw
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YB1685 Datasheet
Pin Configuration
YB1685
2A 380KHz 32V PWM Buck DC/DC Converter
NC 1
8 NC
VIN 2
7 EN
SW 3
6 NC
GND 4
5 FB
SOP-8
Figure 2: Pin Configuration
Pin Description
Table 1
Pin
Name
1,6,8
NC
2 VIN
3 SW
4 GND
5 FB
7 EN
Not Connect.
Description
Supply Voltage Input Pin. YB1685 operates from a 3.6V to 32VDC
voltage.
Bypass VIN to GND with a suitably large capacitor to eliminate noise
on the input.
Power Switch Output Pin. SW is the switch node that supplies
power to the output.
Ground Pin. Care must be taken in layout. This pin should be
placed outside of the Schottky Diode to output capacitor ground
path to prevent switching current spikes from inducing voltage
noise into YB1685.
Feedback Pin. Through an external resistor divider network, FB
senses the output voltage and regulates it. The feedback threshold
voltage is 1.235V.
Enable Pin. EN is a digital input that turns the regulator on or off.
Drive EN pin high to turn on the regulator, drive it low to turn it off.
Ordering Information
Order Number Package Type
YB1685SPX8P
SOP-8
Supplied As
2500 units Tape & Reel
Package Marking
Please contact sales
representative
YB1685 Rev.1.0
www.yobon.com.tw
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Features Datasheet pdf YB1685 2A 380KHz 32V PWM Buck DC/DC Conv erter Description The YB1685 is a 380 K Hz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET. It achieves 2A c ontinuous output current over a wide in put supply range with excellent load an d line regulation. The device includes a voltage reference, oscillation circui t, error amplifier, internal PMOS and e tc. The PWM control circuit is able to adjust the duty ratio linearly from 0 t o 100%. An enable function, an over cur rent protection function and a short ci rcuit protection function are built ins ide. An internal compensation block is built in to minimize external component count. The YB1685 serves as ideal powe r supply units for portable devices. F eatures „ 2A Constant Output Current 140mΩ RDSON Internal Power PMOSFET „ „ „ „ „ „ „ Switch Up to 92% Efficiency Fixed 380KHz Frequency Wide 3.6V to 32V Input Voltage Range Output Adjustable from 1.235V to 30V Output Current Protection Built in Frequency.
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