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PDF uP6203 Data sheet ( Hoja de datos )
| Número de pieza | uP6203 | |
| Descripción | Compact Dual-Phase Synchronous-Rectified Buck Controller | |
| Fabricantes | uPI Semiconductor | |
| Logotipo |  |
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uP6203
Compact Dual-Phase
Synchronous-Rectified Buck Controller
General Description
Features
The uP6203 is a compact dual-phase synchronous-rectified
Buck controller specifically designed to deliver high quality
output voltage for high power applications. This part is
capable of delivering up to 60A output current owing to its
embedded bootstrapped drivers that support 12V + 12V
driving capability. The uP6203 features configurable gate
driving voltage for maximum efficiency and optimal
performance. The built-in bootstrap diode simplifies the
circuit design and reduces external part count and PCB
space.
The output voltage is precisely regulated to internal 0.6V
or external reference voltage from 0.4V to 3.3V. The uP6203
adopts lossless RDS(ON) current sensing technique for
channel current balance and over current protection.
A MODE pin programs single- or dual- phase operation
that makes the uP6203 ideally suitable for dual power input
applications such as PCIE interfaced graphic cards. When
programmed as automatic mode, the uP6203 operates in
single phase at light load condition and maintains high
efficiency over the output current range.
This part features comprehensive protection functions
including over current protection, input/output under voltage
protection, over voltage protection and over temperature
protection.
Other features include adjustable soft start, adjustable
operation phase, and quick response to step load transient.
With aforementioned functions, this part provides
customers a compact, high efficiency, well-protected and
cost-effective solutions. This part is available in spacing-
saving VQFN4x4 -24L package.
Ordering Information
Operate with 4.5V ~13.2V Supply Voltage
Support Single- and Two- Phase Operation
±2.0% Over Line Voltage and Temperature
Simple Single-Loop Voltage-Mode Control
12V Bootstrapped Drivers with Internal
Bootstrap Diode
Lossless RDS(ON) Current Sensing
Adjustable Operation Frequency form 50kHz to
1MHz Per Phase
External Compensation
Adjustable Over Current Protection
Adjustable Soft Start
VQFN4x4 -24L Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Middle-High End GPU Core Power
High End Desktop PC Memory Core Power
Low Output Voltage, High Power Density DC-DC
Converters
Voltage Regulator Modules
Pin Configuration
18 17 16 15 14 13
LGATE2 19
VCC12 20
12 NC
11 FB
Order Number Package Type
Remark
uP6203AQAG VQFN4x4 - 24L
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirements. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
VCC9 21
VCC5 22
LGATE1 23
PHASE1 24
GND
10 COMP
9 RT
8 IMAX
7 MODE
123456
QFN4x4 – 24L
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP6203-DS-F0200
1
1 page  
uP6203
Functional Description
The uP6203 is a compact dual-phase synchronous-rectified
Buck controller specifically designed to deliver high quality
output voltage for high power applications. This part is
capable of delivering up to 60A output current thanks to its
embedded bootstrapped drivers that support 12V + 12V
driving capability. The built-in bootstrap diode simplifies the
circuit design and reduces external part count and PCB
space.
The output voltage is precisely regulated to internal 0.6V
reference voltage or external reference voltage from 0.4V
to 3.3V. The uP6203 adopts RDS(ON) current sensing
technique for channel current balance, and over current
protection.
This part features comprehensive protection functions
including over current protection, input/output under voltage
protection, over voltage protection and over temperature
protection.
Other features include internal soft start, adjustable
operation phase number and quick response to step load
transient. With aforementioned functions, this part provides
customers a compact, high efficiency, well-protected and
cost-effective solutions. This part is available in VQFN4x4
- 24L packages.
Internal 9V LDO Regulators
The uP6203 integrates a 9V LDO regulator for gate drivers
as shown in Figure 1. The 9V LDO receives input voltage
at VCC12 pin and outputs a regulated voltage at VCC9 pin
for the lower gate drivers and the bootstrap circuit for the
upper gate drivers, providing flexible gate driving voltage for
maximum efficiency and optimal performance. When driving
with 9V gate voltage, the converter reduces 25% power
dissipation in the drivers and maintains high efficiency
comparing to 12V driving voltage. This enables the uP6203
to drive MOSFETs with large input capacitors and provides
up to 60A output current without overheating the controller
itself.
When the VCC12 pin is left open, the VCC9 pin could
received well decoupled 4.5V~13.2V voltage for gate drivers
as shown in Figure 2. Since the uP6203 adopts RDS(ON)
current sensing technique for current balance and over
current protection, always consider the RDS(ON) with the
lowest possible gate driving voltage. If the gate driving
voltage is expected to be lower than 7V, special
consideration should be paid to the threshold voltage of
the MOSFETs.
Bootstrap diodes are embedded to facilitates PCB design
and reduce the total BOM cost. No external Schottky diode
is required. However, if the VCC9 pin voltage is expected
to be lower than 5V, external Schottky diode is highly
recommended to get highest gate driving voltage for high
side MOSFET.
VIN = 10.8~13.2V
VCC12
VCC9
9V
LDO
uP6203
Gate
Drivers
Figure 1. 9V Drive Application
VIN = 4.5~13.2V
VCC12
VCC9
9V
LDO
uP6203
Gate
Drivers
Figure 2. Bypass the Internal 9V LDO Regulator.
The VCC9 pin should be locally bypassed by a minimum
1uF ceramic. Place the capacitor physically near the VCC9
pin.
The VCC5 pin receives a well-decoupled 4.5V~5.5V voltage
for internal control circuits. The VCC5 pin should be locally
bypassed by a minimum 1uF ceramic. Place the capacitor
physically near the VCC5 pin.
Power On Reset and Initialization
The uP6203 continuously monitors VCC9 and VCC5 pins
voltage for power on reset (POR) to ensure the supply
voltage is high enough for normal operation of the device.
The POR threshold level is typically 4.3V at VCC5 and
VCC9 rising.
Reference Voltage Selection
The uP6203 features selectable internal or external
reference voltage. The REFIN voltage level is checked at
POR to select the desired reference voltage. Internal 0.6V
reference voltage is selected if VREFIN > 3.3V at POR,
otherwise external reference voltage is selected. Once
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP6203-DS-F0200
5
5 Page 
uP6203
Electrical Characteristics
Parameter
Gate Driver
Upper Gate Sourcing
Upper Gate Sinking
Lower Gate Source
Lower Gate Sink
Dead Time
Soft Start
Soft Start Current
Re-Soft Start Threshold Level
Protection
Over Temperature Protection
Over Temperature Hysteresis
Symbol
Test Conditions
RHG_SRC
RHG_SNK
RLG_SRC
RLG_SNK
TDT
IHG = 100mA sourcing
IHG = 100mA sinking
ILG = 100mA sourcing
ILG = 100mA singking
ISS VSS = 0V
VSS_HICCUP
Guaranteed by Design
Min Typ Max Units
-- 3 6 Ω
-- 2 4 Ω
-- 2.5 5
Ω
-- 1.3 2.6 Ω
-- 30 -- ns
7 10 13 uA
-- 0.5 --
V
140 150 160
-- 20 --
OC
OC
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. Functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 4. The device is not guaranteed to function outside its operating conditions.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F02, File Name: uP6203-DS-F0200
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet uP6203.PDF ] | |
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