STEVAL-ISA051V2 Datasheet, PDF (1/4 Pages) STMicroelectronics – Latched OVP, UVP and thermal shutdown

STEVAL-ISA051V2
Features
Complete DDR2/3 memory power supply controller
evaluation board based on the PM6670AS
Data Brief
■ 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
t(s) ^{■ 0.9 V to 2.6 V adjustable output voltage}
c ^{■ 1.237 V ±1% reference voltage available}
u _{■ Very fast load transient response using}
rod ^{constant on-time loop control}
P ^{■ No R}SENSE ^{current sensing using the R}DS(on)
of the low-side MOSFETs
te _{■ Negative current limit}
ole ^{■ Latched OVP, UVP and thermal shutdown}
s _{■ Fixed 3 ms soft-start}
Ob ■ Selectable pulse-skipping at light load
- _{■ Selectable no-audible (33 kHz) pulse-skip}
t(s) ^mode
■ All ceramic output capacitors application
c _supported
du _{■ Output voltage ripple compensation}
Pro _Description
te _{This evaluation board based on the PM6670AS}
le _{device is a complete DDR2/3 power supply}
so ^{regulator for portable applications designed to}
b_{meet JEDEC specifications. It integrates a}
Oconstant on-time (COT) buck controller, a 2 Apk
STEVAL-ISA051V2
The device is fully compliant with system sleep
states S3 and S4/S5, providing LDO output high
impedance in suspend-to-RAM and tracking
discharge of all outputs in suspend-to-disk.
sink/source low dropout regulator and a 15 mA
low noise buffered reference.
The COT architecture assures fast transient
response supporting both polymeric and ceramic
output capacitors. An embedded integrator
control loop compensates the DC voltage error
due to the output ripple. The 2 Apk sink/source
linear regulator provides the memory termination
voltage with fast load transient response.
March 2008
Rev 1
For further information contact your local STMicroelectronics sales office.
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