General Description
The XL2596 is a 150 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 3A load with high
efficiency, low ripple and excellent line and
load regulation. Requiring a minimum
number of external components, the regulator
is simple to use and include internal
frequency compensation and a
fixed-frequency oscillator.
The PWM control circuit is able to adjust the
duty ratio linearly from 0 to 100%. An enable
function, an over current protection function
is built inside. When second current limit
function happens, the operation frequency
will be reduced from 150KHz to 50KHz. An
internal compensation block is built in to
minimize external component count.
Features
Wide 4.5V to 40V Input Voltage Range
3.3V,5V,12V, and adjustable versions
Output Adjustable from 1.23V to 37V
Maximum Duty Cycle 100%
Minimum Drop Out 1.5V
Fixed 150KHz Switching Frequency
3A Constant Output Current Capability
Internal Optimize Power Transistor
High e fficiency
Excellent line and load regulation
TTL shutdown capability
ON/OFF pin with hysteresis function
Built in thermal shutdown function
Built in current limit function
Built in second current limit function
Available in TO-220,TO-263 packages
Applications
LCD Monitor and LCD TV
Digital Photo Frame
Set-up Box
ADSL Modem
Telecom / Networking Equipment
Function Block
Function Block Diagram of XL2596
Typical Application Circuit
XL2596 Typical Application Circuit 12V-5V/3A
Typical System Application for 3.3V Version
XL2596-3.3 System Parameters Test Circuit
Typical System Application for 5V Version
XL2596-5.0 System Parameters Test Circuit
Typical System Application for 12V Version
XL2596-12 System Parameters Test Circuit
Typical System Application for ADJ Version
XL2596-ADJ System Parameters Test Circuit
Part Number Temp(0℃) Package/Pin Packing Type
Lead Free
XL2596T-ADJE1 -40℃- 85℃ TO220-5L Tube
XL2596T-3.3E1 -40℃- 85℃ TO220-5L Tube
XL2596T-5.0E1 -40℃- 85℃ TO220-5L Tube
XL2596T-12E1 -40℃- 85℃ TO220-5L Tube
XL2596S-ADJE1 -40℃- 85℃ TO263-5L Tube
XL2596S-3.3E1 -40℃- 85℃ TO263-5L Tube
XL2596S-5.0E1 -40℃- 85℃ TO263-5L Tube
XL2596S-12E1 -40℃- 85℃ TO263-5L Tube
XL2596S-ADJTRE1 -40℃- 85℃ TO263-5L Tape/Reel
XL2596S-3.3TRE1 -40℃- 85℃ TO263-5L Tape/Reel
XL2596S-5.0TRE1 -40℃- 85℃ TO263-5L Tape/Reel
XL2596S-12TRE1 -40℃- 85℃ TO263-5L Tape/Reel
FROM: Company Name: Aunytor Electronic (HK) Co.,Ltd
Contact Person: liao
Skype: Aunytor
Email: 2885745253@qq.com