Lossless I Clock SyncTotal # of RegulatorsOther Features/CommentsTemp Range (°C)Packaging
SENSE ——1Hysteretic threshold at 36% or 12% (A version) of programmed current limit; V
OUT OVP-40 to 125MSOP-8 —1Selectable pulse-skip mode for high light load efficiency -5 to 125TSSOP-20 —1User-selectable FPWM and SKIP modes, positive and negative current limit, UVLO, OVP-40 to 125TSSOP-20 —1No compensation required. Current limit; P-FET controller-40 to 125MSOP-8 —1No compensation required. Current limit; P-FET controller; enable pin; power saving shut down mode-40 to 125MSOP-8— 1FB and NFB pins; 1.0V internal V
REF . For industrial temp range, use LM2578A-40 to 125SOIC-8, DIP-8, D, W 1Voltage mode/current injection simpifies loop compensation-40 to 125TSSOP-16, LLP-16 142V version of LM5115-40 to 125TSSOP-16, LLP-16 —3180 out-of-phase; 5-bit
digital control for one channel; linear reg controller-40 to 125TSSOP-48— 3Individual soft-start allows sequencing; 5V, 50 mA linear output, FPWM0 to 125TSSOP-28— 3Individual soft-start allows sequencing; 5V, 50 mA linear output, FPWM0 to 125TSSOP-28 —2180 out-of-phase channels; individual soft-start allows sequencing-40 to 125TSSOP-28 —2180 out-of-phase channels; ddj linear reg controller and 3.3V output rail0 to 125TSSOP-48 —2PWM/SKIP and FPWM modes; soft shutdown, line feedforward, 180 out-of-phase -5 to 125TSSOP-28, LLP-28 —2Same as LM2647 with lower V
IN and auto-recover from faults-40 to 125TSSOP-28 2180 out-of-phase channels; individual soft-start allows sequencing-40 to 125TSSOP-28 2180 out-of-phase channels; individual soft-start allows sequencing-40 to 125TSSOP-28
LM3489 Hysteretic PFET Buck Control with Enable Pin
Features
• Easy-to-use control methodology• No control loop compensation required
• Wide 4.5V to 35V input range • 1.239V to V High Efficiency, Robust, Power Supply
V IN ADJ R ADJ Q1
CIN2D1LR1R2R V OUT IN adjustable output range• 93% efficiency
IS +C PGATEADJV I SENSE ff +C C IN1 C OUT LM3489
FBGND7V to 28V3.3V to o.5A IN ENPGND power.national.com 9