LM2737 ,N-Channel FET Synchronous Buck Regulator Controller for Low Output VoltagesPin Descriptionon this pin is compared with an internally generated rampBOOT (Pin 1) - Supply rail ..
LM2737MTC ,N-Channel FET Synchronous Buck Regulator Controller for Low Output VoltagesApplicationsduty-cycle operation. The wide range of operating frequen-n Cable Modemscies gives the ..
LM2737MTC ,N-Channel FET Synchronous Buck Regulator Controller for Low Output VoltagesLM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output VoltagesJune 2003L ..
LM2737MTCX ,N-Channel FET Synchronous Buck Regulator Controller for Low Output VoltagesPin Descriptionon this pin is compared with an internally generated rampBOOT (Pin 1) - Supply rail ..
LM2737MTCX/NOPB ,N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages 14-TSSOP -40 to 125features. The(LM2737)LM2737 and LM2737 operate from a low-current 5Vbias and can convert from a 2.2 ..
LM2738XSD/NOPB ,550kHz/1.6MHz 1.5A Step-Down DC-DC Switching Regulator 8-WSON -40 to 125Features 3 DescriptionThe LM2738 regulator is a monolithic, high-1• Space-Saving WSON and MSOP-Powe ..
LM614CWM ,Quad Operational Amplifier and Adjustable ReferenceLM614 Quad Operational Amplifier and Adjustable ReferenceDecember 2001LM614Quad Operational Amplifi ..
LM614CWMX ,Quad Operational Amplifier and Adjustable ReferenceFeaturesThe LM614 consists of four op-amps and a programmable Op Ampvoltage reference in a 16-pin p ..
LM614IWM ,Quad Operational Amplifier and Adjustable ReferenceElectrical Characteristics− +These specifications apply for V = GND = 0V, V = 5V, V =V = 2.5V, I = ..
LM614IWMX ,Quad Operational Amplifier and Adjustable ReferenceFeaturesThe LM614 consists of four op-amps and a programmable Op Ampvoltage reference in a 16-pin p ..
LM614WM ,Quad Operational Amplifier and Adjustable ReferenceElectrical Characteristics− += = = = = =These specifications apply for V GND 0V, V 5V, V V 2.5V, I ..
LM6152 ,Dual High Speed/Low Power 75 MHz Gain Bandwidth Rail-to-Rail I/O Operational Amplifiersapplications where higherLarge signal 45V/mspowerdevicesunacceptablydrainbatterylife.TheslewrateYLo ..
LM2737
N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
LM2727/LM2737
N-Channel FET Synchronous Buck Regulator Controller
for Low Output V oltages
General DescriptionThe LM2727isa high-speed, N-Channel synchronous buck
regulator controller witha 0.6V feedback reference voltage.
The LM2727/37 employsa fixed-frequency voltage-mode
PWM control architecture thatis adjustable from 50KHzto
2MHz throughan external resistor. The wide rangeof PWM
frequencies givesthe power supply designerthe flexibilityto
make tradeoffs among component size, cost, noise and
efficiency. The power MOSFETs canrunona separate 2.2V 16Vrail making the device idealfor highly efficient 3.3V
conversion. The regulatoris biased froma 4.5V-5.5V, 2mA
rail. Power-good flag, enable and soft start features make
power sequencing easy. Protection features include output
under-voltage and over-voltage latch-off (LM2727 only) and
current limit. Current limitis achievedby monitoring the
voltage drop acrosstheon resistanceof the low-side MOS-
FET. The adaptive non-overlapping MOSFET gate drivers
help avoid potential shoot-through problems while maintain-
ing high efficiency. Both high-side and low-side MOSFETs
are lower cost N-Channel type, and theIC can accepta
bootstrap structureto saturate the high-side MOSFETfor
highest efficiency. The output voltageis adjustable downto
0.6V.
Features Input voltage from 2.2Vto 16V Output voltage adjustable downto 0.6V Power Good flag and output enable Output under-voltage and over-voltage latch-off (LM2727
only) Reference Accuracy: 1.5% over temperature Current limit without sense resistor Soft start Switching frequency from50 kHzto2 MHz Tiny plastic TSSOP-14 package
Applications Set-Top Boxes/ Home Gateways Core Logic Regulators High-Efficiency Buck Regulation
Typical ApplicationAugust 2002
LM2727/LM2737
N-Channel
FET
Synchronous
Buck
Regulator
Controller
for
Low
Output
