AN2798 datasheet(5/38 Pages) STMICROELECTRONICS

5 / 38 page

AN2798

Main features

5/38

Main features

1.1

Switching section (VDDQ)

■ 4.5 V to 36 V input voltage range

■ 0.9 V, ± 1 % voltage reference

■ 1.8 V (DDR2) or 1.5 V (DDR3) fixed output voltages

■ 0.9 V to 2.6 V adjustable output voltage

■ 1.237 V ± 1 % reference voltage available

■ Very fast load transient response constant on-time loop control

■ No-RSENSE current sensing using low-side MOSFETs' RDSON

■ Negative current limit

■ Latched OVP, UVP and thermal shutdown

■ Fixed 3 ms soft-start

■ Selectable pulse-skipping at light load

■ Selectable non-audible (33 kHz) pulse-skip mode

■ All ceramic output capacitor applications supported

■ Output voltage ripple compensation

1.2

Reference and termination voltages (VTTREF and VTT)

■ 2 A peak LDO with foldback for VTT

■ Remote VTT output sensing

■ High-Z VTT output in S3

■ All ceramic output capacitor applications supported

■ ±15 mA low-noise buffered reference for VTTREF

AN2798 数据表(PDF) 5 Page - STMicroelectronics