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부품번호 US3026A 기능
기능 DUAL-CHANNEL USB POWER SWITCH AND OVER-CURRENT PROTECTION
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US3026A 데이터시트, 핀배열, 회로
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
US3026A
DUAL-CHANNEL USB POWER
SWITCH AND OVER-CURRENT
PROTECTION
CMOS IC
DESCRIPTION
The UTC US3026A is a standard dual channels power switch with
independent over-current protection fault flag functions, optimized for
bus-powered Universal Serial Bus (USB) and self-powered
applications, including Notebook and desktop PC’s that supply
power to more than one port.
The UTC US3026A also offers thermal shutdown protection that
reduces current consumption in fault modes for each switch and the
entire device. With a 1ms delay on the fault FLAG output prevents
erroneous over current reporting caused by in-rush currents during
hot-plug events.
In addition, the UTC US3026A employs soft-start circuitry that
minimizes in-rush current in applications where highly capacitive
loads are employed.
SOP-8
*Pb-free plating product number: US3026AL
FEATURES
* Two P-channel power MOSFET control switch
* 110µA Max operating current
* 5µA Max standby current
* 145 mMax switch resistance
* 2.7V ~ 5.5V input voltage range
* 500mA minimum continuous load current
* Smooth turn-on eliminates in-rush induced voltage drop
* 1 ms fault flag delay filters Hot-Plug events
* Over-current protection
* Under-voltage lockout circuit
* Thermal shutdown protection
* Flag indicates fault conditions
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
US3026A-S08-R
US3026AL-S08-R
US3026A-S08-T
US3026AL-S08-T
Package
SOP-8
SOP-8
Packing
Tape Reel
Tube
US3026AL-S08-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8
(3) L: Lead Free Plating, Blank: Pb/Sn
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R502-086,A




US3026A pdf, 반도체, 판매, 대치품
US3026A
CMOS IC
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN -0.3 ~ +6
V
Output Voltage
Voltage at All Other Pins
VOUT
VOTHER
-0.3 ~ +6
-0.3 ~ +6
V
V
Total Power Dissipation
TJMAX
PD
TJMAX
300
160
mW
Junction Temperature
Operating Temperature
TJ
TOPR
+155
-40 ~ +85
Storage Temperature
TSTG
-55 ~ +155
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
OPERATING RATINGS
PARAMETER
SYMBOL
RATINGS
Supply Voltage Range
VIN +2.7 ~ +5.5
Operating Temperature
TOPR
0 ~ +70
Note: The human body model is a 100pF capacitor discharged through a 1.5kresistor into each pin.
UNIT
V
ELECTRICAL CHARACTERISTICS(TJ = 25°C, VIN = 5.0V, VEN = 0V, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
DC CHARACTERISTIC
EN Input Logic
High
Low
Under-Voltage Lockout Threshold
OUT Pins Continuous Output
Current
VIH
VIL
VUVLO
IOUT
(Note 1)
(Note 1)
VIN=increasing
Hysteresis voltage
Each Output
Over-Current Threshold
OUT Pins Output Leakage Current
EN Leakage Current
Supply Current
OFF
ON
Error FLAG Leakage Current
On Resistance
FLAG Output Voltage
Over-Temperature Shutdown
Threshold
THDOC
ILEAK
IEN
IO(OFF)
IO(ON)
IFH
RON
RFO
THDOT
VEN = VIN
VEN = 0V or VEN = VIN
Switch-Off
Switch-On
VFLAG = 5V
VIN = 5V, IOUT = 500mA, each switch
VIN = 2.7V, IOUT = 500mA, each switch
IFO = 10 mA, VIN = 5.0V
IFO = 10 mA, VIN = 3.3V
IFO = 10 mA, VIN = 2.7V
TJ Increasing, with no shorted output
TJ Increasing, with shorted output (s)
TJ Decreasing (Note 2)
AC CHARACTERISTIC
Over Current Flag Delay
tOC RL = 0
OUT Rise Time
tR RL = 10
OUT Fall Time
tF RL = 10
Turn on Delay, EN to OUT
tON RL = 10
Turn off Delay, EN to OUT
tOFF RL = 10
Note: 1. OFF is EN 2.4V and ON is EN 0.8V.
2. Thermal Shutdown will protect the device from permanent damage.
MIN TYP MAX UNIT
2.4 1.7
V
1.6 0.8 V
2.3 2.7 V
100 mV
0.5 A
1.5 2.2 A
0.01 10 µA
-0.5 0.5 µA
1 5 µA
110 µA
0.01 1 µA
105
135
145
180
m
10 20
11 30
12 40
155
145 °C
135
1 ms
160 µs
5 µs
240 µs
5 µs
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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US3026A 전자부품, 판매, 대치품
US3026A
CMOS IC
FUNCTIONAL DESCRIPTION
The UTC US3026A is dual P-Channel switches with active-low and active-high enable inputs, respectively. Fault
conditions (such as UVLO, thermal shutdown and over-current) that appear will turn off the power switch, and the
FLAG pin will go low. Of course, the two internal FLAG circuits also operate respectively.
Input and Output
IN (Input) is the power supply connection to the control circuitry and the source of the output MOSFET. OUTX
(Output) is the connection to the drain of the output MOSFET. In a typical application circuit, current flows through
the switch from IN to OUTX towards the load. If VOUT is greater than VIN when the switch is enabled, current will flow
from OUTX to IN since the MOSFET is bi-directional.
Power ON and OFF
The UTC US3026A performs a soft-start operation on power application, which is to prevent an over-current or
inrush-current from flowing through the switch from IN to OUTX towards to the load, while the high-capacity
capacitor is connected to the OUTX.
Thermal Shutdown
The UTC US3026A is internally protected against excessive power dissipation by thermal shutdown protection
circuit. If device junction temperature rise above approximately 145 , both switches are turned off, both fault FLAG
outputs are activated, and they goes low. Hysteresis ensures that both switches turned off by thermal shutdown will
not be turned on again until the die temperature is reduced to 135 . When the thermal shutdown circuit is activated,
the output pins are in the OFF status. However, the UTC US3026A enters the standby status when EN pins are all
inactive.
Current Limit
The current limit circuit is designed to protect the output MOSFET, the load and the IC supply from damage
caused by excessive currents. The current limit threshold is preset internally, If an over-current is detected, the IC
performs a slow-start operation again, it is assumed that output is short circuit, and FLAG pin will go low, FLAG
output is available to indicate fault conditions independently to the USB controller.
Under-Voltage Lockout
UVLO prevents the output MOSFET switch from turning on until input voltage exceeds 2.3V (typical). If input
voltage drops below 2.2V (typical), UVLO shuts off the both output MOSFET switches and signals the FLAG.
Fault FLAG
The fault FLAG is an output with open-drain of N-channel. The fault FLAG is pulled down when any of the
conditions such as under-voltage, current limit and thermal shutdown. In a typical application circuit, the FALG pin
has a pull-up resistor of 10kto input voltage.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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US3026A

DUAL-CHANNEL USB POWER SWITCH AND OVER-CURRENT PROTECTION

Unisonic Technologies
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