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부품번호 uP1713 기능
기능 High-Efficiency Synchronous-Rectified Buck Converter
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uP1713 데이터시트, 핀배열, 회로
uP1713
1MHz, 2.0A, High-Efficiency
Synchronous-Rectified Buck Converter
General Description
Features
The uP1713 is a high efficiency synchronous-rectified buck
converter with internal power switches. Fixed 1MHz PWM
operation allows possible smallest output ripple and
external component size. With high conversion efficiency
and small package, the uP1713 is ideally suitable for
portable devices and USB/PCIE-based interface cards
where PCB area is especially concerned.
With internal low RDS(ON) switches, the uP1713 is capable
of delivering 2.0A output current over a wide input voltage
range from 2.6V to 5.5V. The output voltage is adjustable
from 0.6V to V by a voltage divider. Other features include
IN
internal soft-start, chip enable, over-voltage, under-
voltage, over-temperature and over-current protections.
The uP1713 is available in a space-saving WQFN3x3-
16L, WLCSP1.5x1.5-9B or PSOP-8L packages.
Applications
† Battery-Powered Portable Devices
„ MP3 Players
„ Digital Still Cameras
„ Wireless and DSL Modems
„ Personal Information Appliances
† 802.11 WLAN Power Supplies
† FPGA/ASIC Power Supplies
† Dynamically Adjustable Power Supply for
CDMA/WCSMA Power Amplifiers
† USB-Based xDSL Modems and Other Network
Interface Cards
† Point-of-Load Regulation
† 2.6V to 5.5V Input Voltage Range
† Adjustable Output from 0.6V to VIN
† Guaranteed 2.0A Output Current
† Accurate Reference: 0.6V (+ 1.5%)
† Up to 95% Conversion Efficiency
† Low Quiescent Current
† Integrated Low RDS(ON) Upper and Lower
MOSFET Switches: 100mΩ and 85mΩ
† Current Mode PWM Operation
† Fixed Frequency: 1MHz
† 100% Maximum Duty Cycle for Lowest Dropout
† Internal Soft-Start
† No Schottky Diode Required
† Over-Voltage and Under-Voltage Protection
† Over-Temperature and Over-Current Protection
† WQFN3x3-16L, WLCSP1.5x1.5-9B or PSOP-8L
Packages
† RoHS Compliant and Halogen Free
Ordering Information
Order Number
uP1713PQDD
uP1713AFA9
uP1713PSU8
uP1713QSU8
Package Type
WQFN3x3-16L
WLCSP1.5x1.5-9B
PSOP-8L
PSOP-8L
Top Marking
uP1713P
uP1713A
uP1713P
TBD
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.
Pin Configuration
PGND 1
PGND 2
PGND 3
FB 4
12 VIN
11 VIN
10 VIN
9 VCC
WQFN3x3-16L
EN VIN VIN
A
NC LX LX
B
FB PGND PGND
C
123
WLCSP1.5x1.5-9B
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P01, File Name: uP1713-DS-P0100
AGND
NC
EN
POK
18
27
PGND
36
45
PSOP - 8
FB
PGND
LX
VIN
1




uP1713 pdf, 반도체, 판매, 대치품
uP1713
Functional Description
The uP1713 is a high efficiency synchronous-rectified buck
converter with internal power switches. Fixed 1.0MHz
PWM operation allows possible smallest output ripple and
external component size. With high conversion efficiency
and small package, the uP1713 is ideally suitable for
portable devices and USB/PCIE-based interface cards
where PCB area is especially concerned.
where output capacitor is about 22uF.
EN
(2V/Div)
With internal low R switches, the uP1713 is capable
DS(ON)
of delivering 2.0A output current over a wide input voltage
range from 2.6V to 5.5V. The output voltage is adjustable
from 0.6V to VIN by a voltage divider. Other features include
internal soft-start, chip enable, over voltage, under-voltage,
over-temperature and over-current protections. The
uP1713 is available in a space-saving WQFN3x3-16L,
WLCSP1.5x1.5-9B or PSOP-8L packages.
Input Supply Voltages, VIN & VCC
The uP1713 features seperate power supply and ground
pins for power stages and control circuit, isolating the
control circuit from noise associated with the power
MOSFET switching.
The VIN pins provide current to the power stage. The
supply voltage range is from 2.6V to 5.5V. The uP1713
draws pulsed current with sharp edges from VIN each time
the upper switch turns on, resulting in voltage ripples and
spikes at supply input. A minimum 10uF ceramic capacitor
with shortest PCB trace is highly recommended for
bypassing the supply input.
The VCC pin provides currents for the internal control
circuit. A power on reset (POR) continuously monitors
the input supply voltage. The POR level is typically 2.3V
at VCC rising. Use low pass filter R3 and C3 as shown in
the Typical Application Circuit to filter the input noise
associated with the power switching.
Chip Enable/Disable and Soft Start
The uP1713 features an EN pin for enable/disable control
of the output voltage. Pulling the EN pin lower than 0.4V
shuts down the uP1713 and reduces its quiescent current
lower than 1uA. In the shutdown mode, both upper and
lower switches are turned off.
Pulling EN pin higher than 1.5V enables the uP1713 and
initiates the softstart cycle once the V POR is granted.
CC
The inductor current is limited to fractions of its rated value
during the softstart cycle. Figure 1 illustrates the softstart
behavior of the uP1713. The inductor current ramps up
stairwisely with 250mA increments and 60us duration each
step. Note that the output capacitor is large to illustrate
the whole softstart behavior. The output voltage may ramp
up to its target level in 2 or 3 steps in real applications
VOUT
(0.5V/Div)
ILX
(500mA/Div)
Time (100us/Div)
Figure 1. Softstart of uP1713.
The uP1713 asserts end of soft start and set the current
limit to its normal level when the soft start duration expires.
After soft start end, the POK pin is set high impedance if
no fault occurs.
PWM Operation
The uP1713 adopts slope-compensated, current mode
PWM control capable of achieving 100% duty cycle. During
normal operation, the uP1713 operates at PWM mode to
regulate output voltage by transferring the power to the
output voltage cycle by cycle at a constant 1.0MHz
frequency. The uP1713 turns on the upper switch at each
rising edge of the internal oscillator allowing the inductor
current to ramp up linearly. The switch remains on until
either the current-limit is tripped or the PWM comparator
turns off the switch for regulating output voltage. The upper
switch current is sensed, slope compensated and
compared with the error amplifier output COMP to
determine the adequate duty cycle. The VOUT pin senses
output feedback voltage from an external resistive divider.
When the load current increases, it causes a slight
decrease in the feedback voltage relative to the 0.6V
reference, which in turn, causes the error amplifier output
voltage to increase until the average inductor current
matches the new load current.
Low Dropout Mode
The uP1713 increases duty cycle to maintain output
voltage within its regulation as the supply input drops
gradually in the battery-powered applications. The uP1713
operates with 100% duty cycle and enters low dropout
mode as the supply input approaches the output voltage.
This maximizes the battery life.
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. P01, File Name: uP1713-DS-P0100
4

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uP1713 전자부품, 판매, 대치품
uP1713
Electrical Characteristics
Parameter
Symbol
Test Conditions
Min Typ Max Units
Oscillator
Switching Frequency Range
Maximum Duty Cycle
Power Switches
fOSC
DC VIN = VOUT ; VFB = 0.55V
0.8 1.0 1.2 MHz
100 -- -- %
RDS(ON) of Upper Switch
RDS(ON) of Lower Switch
Logic Input
RP_FET VIN = 3.6V, ILX = 100mA
RN_FET VIN = 3.6V, ILX = -100mA
-- 100 -- mΩ
-- 85 -- mΩ
EN Logic Low Threshold
EN Logic High Threshold
Power OK Output
VIL VIN = 2.6V to 5.5V, Shutdown
VIH VIN = 2.6V to 5.5V, Enable
-- -- 0.4 V
1.5 -- -- V
Logic High Leakage Current
Logic Low Voltage
Protection
IPOK
VPOK
VPOK = VCC = 5V
IPOK = 1mA
-- -- 1 uA
-- -- 0.2 V
FB Under Voltage Protection
FB Falling, for uP1713PSU8
ΔFB_UVP FB Falling, for uP1713QSU8
-- 50 --
-- 0 -- %VREF
Over Current Protection
-- 3 -- A
Thermal Shutdwon Temperature
Thermal Shutdown Hysteresis
TSHDN by design
ΔTSHDN by design
-- 150 -- OC
-- 20 -- OC
Note 1. Stresses listed as the above Absolute Maximum Ratingsmay 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. P01, File Name: uP1713-DS-P0100
7

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