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What is uP1561?

This electronic component, produced by the manufacturer "uPI Semiconductor", performs the same function as "Synchronous Buck Controller".


uP1561 Datasheet PDF - uPI Semiconductor

Part Number uP1561
Description Synchronous Buck Controller
Manufacturers uPI Semiconductor 
Logo uPI Semiconductor Logo 


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Conceptual
uP1561
Synchronous Buck Controller with 3A VTT LDO
for Memory Power Solution
General Description
Features
The uP1561 is a high performance synchronous buck
controller with 3A source/sink VTT LDO for memory
systems power. It also provides the buffered low noise
reference. The uP1561 has wide operation ranging from
3.0V to 26V for input power and 0.75V~3.0V for memory
output voltage.
The synchronous buck of the uP1561 adopts constant-
on-time PWM scheme that features easy-to-use, low
external component count, fast transient response and
quasi- constant frequency operation over the operation
range or in current mode to support ceramic output
capacitors.
The 3A source/sink VTT LDO has fast transient response,
requiring only two 10uF of ceramic output capacitors. In
addition, the LDO supply input is available externally to
significantly reduce the total power losses. The uP1561
supports all the sleep state controls, in S3 state (suspend
to RAM) VTT is at high-Z and in S4/S5 (suspend to disk)
VDDQ, VTT and VTTREF soft off.
The uP1561 has complete functions including under
voltage protection, over current protection, over voltage
protection, power-up sequencing, power OK output, and
thermal shutdown. The uP1561 is available in VQFN4x4-
24L and WQFN3x3-20L packages.
Applications
Desktop PCs, Notebooks, and Workstations
Microprocessor and Chipset Supplies
DDR3/DDR2 Memory Power Supplies
SSTL-2 SSTL-18 and HSTL Bus Termination
Synchronous Buck Controller (VDDQ)
Wide Input Voltage Range 3.0V to 26V
Fast Load Transient Response
Current Mode Option Supports Ceramic
Output Capacitors
Soft-Off in S4/S5 States
R Current Sensing Technique
DS(ON)
1.5V (DDR3), 1.8V (DDR2) Fixed Output or
Adjustable Output (0.75V to 3.0V)
POK, OVP, and UVP
3A LDO (VTT)
3A Source/Sink Capability
Two 10uF Ceramic Output Capacitors
Support High Z in S3 and Soft-Off in S4/S5
Thermal Shutdown
+20mV Accuracy
Reference Voltage (VTTREF)
+20mV Accuracy
Low Noise +10mA Output
Ordering Information
Order Number Package Type
Remark
uP1561PQAG VQFN4x4-24L
uP1561QQKF WQFN3x3-20L
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirement. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. C00, File Name: uP1561-DS-C0000
1

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uP1561 equivalent
S3
S5
MODE
VTTREF
VTTIN
VTT
VTTGND
VTTSNS
VDDQSNS
VDDQSET
COMP
CS
Conceptual
uP1561
Functional Block Diagram
Enable and
Discharge Mode
Select
DDR Mode
Select
VCC5 POK
1.25V
0.75V
Reference
Voltage and POR
Generator
VCC5
POK
VOV
VPOK
OV
VUV UV
VDDQSNS
PHASE
Control
Logic
OVP/UVP/
OCP
Ton/Toff
PVCC5
PVCC5
BOOT
UGATE
PHASE
LGATE
PGND
PWM
OCP
Current Mode
Select and
Control
1.25V
0.75V
0.75V
PHASE
Isense
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. C00, File Name: uP1561-DS-C0000
5


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for uP1561 electronic component.


Information Total 17 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
uP1561The function is Synchronous Buck Controller. uPI SemiconductoruPI Semiconductor

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