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UPI |
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Preliminary
uP6161
Single 12V Input Supply Dual Regulator -
Synchronous-Buck-PWM and Linear-Regulator Controller
General Description
Features
The uP6161 integrates a high performance synchronous-
rectified buck controller and a linear-regulator controller.
This part works with a single +12V supply voltage and
delivers two high quality output voltages for both processing
unit and memory unit. An internal linear regulator provides
optimum 9V drive voltage for efficiency and thermal
management.
The buck controller features internal MOSFET drivers that
supports bootstrapped voltage for high efficiency power
conversion. The bootstrap diode is built-in to simplify the
circuit design and minimize external part count. It
incorporates simple, single feedback loop, voltage-control
with fast transient response.
The linear controller drives an external N-Channel MOSFET
with under voltage protection during both soft start and
normal operation.
Other features include adjustable operation frequency,
internal soft start, under voltage protection, adjustable over
current protection and shutdown function. With the above
function, this part provides customers a compact, well
protected and cost-effective solution. This part is available
in SOP-14 and QFN3x3 -16L packages.
Applications
Power Supplies for Microprocessors or
Subsystem Power Supplies
Cable Modems, Set Top Boxes, and DSL
Modems
Industrial Power Supplies; General Purpose
Supplies
12V Input DC-DC Regulators
Low-Voltage Distributed Power Supplies
Operate with Single 12V Supply
Self-Regulated 9V Drive Voltage
Integrated Boot Diode
Provide Two Regulated Voltages
One Synchronous-Rectified Buck Controller
One Linear Controller
Both Controllers Drive N-Channel MOSFETs
Smaller Converter Size
Excellent Output Voltage Regulation
1.5% for Buck Controller
2% for Linear Controller
Simple Single-Loop Control Design
Voltage-Mode PWM Control
Fast Transient Response
High-Bandwidth Error Amplifier
Lossless, Programmable Overcurrent Protection
Uses Lower MOSFET R
DS(ON)
Adjustable Frequency from 150kHz to 1MHz
Internal Soft Start for Both Outputs
Under Voltage Protection for Both Outputs
including Soft Start Cycle
SOP-14 and QFN3x3-16 packages
RoHS Compliant and 100% Lead Free
Ordering Information
Order Number Package Type
Remark
uP6161S14 SOP - 14
uP6161Q
QFN3x3 - 16
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 and RoHS requirements. They are 100%
matte tin (Sn) plating and suitable for use in SnPb or Pb-
free soldering processes.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P00, File Name: uP6161-DS-P0001
1
www.datasheet4u.com
Preliminary
uP6161
Pin Configuration
BOOT
RT/DIS
COMP
FB
LDRV
LFB
AGND
1 14
2 13
3 12
4 11
5 10
69
78
SOP-14
UGATE
PHASE
PGND
LGATE
PVCC9
VCC9
VCC12
COMP
FB
LDRV
LFB
1
2
3
4
PGND
12 PGND
11 LGATE
10 PVCC9
9 VCC9
QFN3x3 – 16L
+12V
VIN2
VOUT2
Disable
Enable
PVCC9
10
VCC9
9
LDRV
5
LFB
6
RT/DIS#
2
VCC12
8
1
BOOT
UGATE
14
PHASE
13
LGATE
11
PGND
13
FB
4
Typical Application Circuit
VIN1
VOUT1
R1
GND
7
COMP
3
R2
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P00, File Name: uP6161-DS-P0001
2
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