LM20323MH/NOPB ,4.5-36V, 3A Current Mode Synchronous Buck Regulator 20-HTSSOP -40 to 125DESCRIPTION (CONTINUED)The LM20323 is designed to work well in multi-rail power supply architecture ..
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Soldering Information
Dual-ln-Line Package
Soldering (10 seconds) ..
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LM20323MH/NOPB
36V,3A 500 kHz Synchronous Buck Regulator
VIN SW
AGND
PGOOD
VOUT
RFB1
COUTEN
SS/TRK VCC
CVCC
CC1
COMP
VIN
LM20323BOOT
GND
CBOOT
(Optional)
LM20323
www.ti.com SNVS557C –MAY 2008–REVISED APRIL 2013
LM20323 36V, 3A 500 kHz Synchronous Buck Regulator
Checkfor Samples: LM20323
1FEATURES APPLICATIONS 4.5Vto 36V Input Voltage Range • Simpleto Design, high Efficiency Pointof
Load Regulation froma 4.5Vto 36V Bus• 3A Output Current, 5.2A Peak Current High Performance DSPs, FPGAs, ASICs and• 130 mΩ/110 mΩ Integrated Power MOSFETs
Microprocessors• 93% Peak Efficiency with Synchronous Communications Infrastructure, AutomotiveRectification DESCRIPTION• 1.5% Feedback Voltage Accuracy The LM20323isa full featured 500kHz synchronous
• Current Mode Control, Selectable buck regulator capableof delivering upto 3Aof load
Compensation current. The current mode control loopis externally
Fixed 500 kHz Switching Frequency compensated with only two components, offering both
high performance and easeof use. The deviceis
• Adjustable Output Voltage Downto 0.8V optimizedto work over the input voltage rangeof
• Compatible with Pre-biased Loads 4.5Vto 36V makingit well suited for high voltage
Programmable Soft-start with External systems.
Capacitor The device features internal Over Voltage Protection
• Precision Enable Pin with Hysteresis (OVP) and Over Current Protection (OCP) circuits for
increased system reliability.A precision Enable pin
• Integrated OVP, UVLO, PGOODand integrated UVLO allows the turn-onof the device
• Internally Protected with Peak Current Limit, tobe tightly controlled and sequenced. Startup inrush
Thermal Shutdown and Restart currents are limited by both an internally fixed and
• Accurate Current Limit Minimizes Inductor externally adjustable soft-start circuit. Fault detection
Size and supply sequencing are possible with the
integrated power good (PGOOD) circuit.
• Non-linear Current Mode Slope Compensation 20-Pin HTSSOP Exposed Pad Package
Simplified Application Circuit