STEVAL-ISA051V2 STMicroelectronics, STEVAL-ISA051V2 Datasheet - Page 2

BOARD EVAL PM6670AS DDR2/3

STEVAL-ISA051V2

Manufacturer Part Number
STEVAL-ISA051V2
Description
BOARD EVAL PM6670AS DDR2/3
Manufacturer
STMicroelectronics
Type
DC/DC Switching Converters, Regulators & Controllersr
Datasheets

Specifications of STEVAL-ISA051V2

Design Resources
STEVAL-ISA051V2 Gerber Files STEVAL-ISA051V2 Schematic STEVAL-ISA051V2 Bill of Material
Main Purpose
Special Purpose DC/DC, DDR Memory Supply
Outputs And Type
4, Non-Isolated
Voltage - Output
1.5V, 1.8V
Voltage - Input
4.5 ~ 36V
Regulator Topology
Buck
Board Type
Fully Populated
Utilized Ic / Part
PM6670A
Input Voltage
4.5 V to 36 V
Output Voltage
1.8 V, 1.5 V
Product
Power Management Modules
Silicon Manufacturer
ST Micro
Silicon Core Number
PM6670AS
Kit Application Type
Power Management
Application Sub Type
DDR2/3 Memory Power Supply Controller
Kit Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Power - Output
-
Frequency - Switching
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
PM6670AS
Other names
497-8412

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
STEVAL-ISA051V2
Manufacturer:
STMicroelectronics
Quantity:
1
Contents
Contents
1
2
3
4
5
6
7
2/53
Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1
3.2
3.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1
7.2
VDDQ section - constant on-time PWM controller . . . . . . . . . . . . . . . . . . 20
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1.1
7.1.2
7.1.3
7.1.4
7.1.5
7.1.6
7.1.7
7.1.8
7.1.9
7.1.10
7.1.11
7.1.12
VTTREF buffered reference and VTT LDO section . . . . . . . . . . . . . . . . . 36
7.2.1
7.2.2
Constant-on-time architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Output ripple compensation and loop stability . . . . . . . . . . . . . . . . . . . . 23
Pulse-skip and no-audible pulse-skip modes . . . . . . . . . . . . . . . . . . . . . 28
Mode-of-operation selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Current sensing and current limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
POR, UVLO and soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power-Good signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
VDDQ output discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Gate drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference voltage and bandgap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Over voltage and under voltage protections . . . . . . . . . . . . . . . . . . . . . 35
Device thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
VTT and VTTREF soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
VTTREF and VTT outputs discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Doc ID 14436 Rev 2
PM6670AS

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