US201 [UTC]
POWER SWITCHES WITH FLAG; 电源开关, FLAG型号: | US201 |
厂家: | Unisonic Technologies |
描述: | POWER SWITCHES WITH FLAG |
文件: | 总6页 (文件大小:252K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
US201/US201A
Preliminary
CMOS IC
80mΩ, 500mA/1.1A HIGH-SIDE
POWER SWITCHES WITH FLAG
DESCRIPTION
The UTC US201/A series are 80mΩ, 500mA for US201 (1.1A for
US201A) high-side power switches. There’s internal single low
voltage N-Channel MOSFET which makes it an ideal for all USB
applications. This MOSFET should be driven by a charge pump
circuitry inside. Its switch on resistance is as low as 80mꢀ which we
know specially meets the drop voltage for USB applications.
The flag pin can output an open-drain fault flag to next controller.
There’re lots internal special ways for protecting the chip’s
operation.
When in hot-plug events, there’s large current which can create
the upstream voltage droop to match the USB’s voltage droop
requirements and soft-start for isolating the power source.
As soon as the die temperature is higher than 130℃, the internal
shutdown circuit will work.
Lead-free:
Halogen-free:US201G/US201AG
US201L/US201AL
Only when there’s a normal input voltage in the VIN pin, the UVLO
(under-voltage lockout, 1.7V typ.) can make sure the chip is till in
the off state.
Because of the requirement of USB power the fault current
should be ensured less than 800mA (UTC US201, single port) and
1.5A (UTC US201A, dual ports).
FEATURES
* 80mꢀ(typ) N-Channel MOSFET
* Supply current:
– Switch on :25μA(typ)
– Switch off :1μA (typ)
* Load current 500mA for US201 and 1.1A for US201A
* Input voltage from 2V to 5.5V
* In off-state: Output voltage can be higher than input
ORDERING INFORMATION
Ordering Number
Package
Packing
Normal
Lead Free
Halogen Free
US201G-AF5-R
US201AG-AF5-R
US201-AF5-R
US201A-AF5-R
US201L-AF5-R
US201AL-AF5-R
SOT-25
SOT-25
Tape Reel
Tape Reel
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UNISONIC TECHNOLOGIES CO., LTD
US201/US201A
Preliminary
CMOS IC
MARKING
3
2
1
USB
L: Lead Free
L: Halogen Free
Current Code
1: 500mA
A: 1.1A
4
5
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO
PIN NAME
CTL
DESCRIPTION
1
2
3
4
5
High active
Ground
GND
FLG
Open-drain fault flag output
Power input voltage
Output voltage
VIN
VOUT
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US201/US201A
Preliminary
CMOS IC
BLOCK DIAGRAM
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US201/US201A
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
6.5
UNIT
V
Supply Voltage
VCC
+2~ +5.5 (Note 3)
-0.3~ +6.5
0~ +5.5 (Note 3)
6.5
V
V
CTL
FLG
VCTL
Input/Output Pins
V
V
FLG
V
Power Dissipation (Ta=25°С)
Junction Temperature
PD
0.25
W
℃
℃
℃
150
TJ
-20~ +100 (Note 3)
-65~ +150
Storage Temperature
TSTG
Note:1. 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.
2.
3.
Stresses listed as the "Absolute Maximum Ratings" will cause permanent damage to the device.
The device is not guaranteed to function when it’s beyond its operating conditions.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
250
UNIT
Junction-to-Ambient
θJA
℃/W
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
VIL
TEST CONDITIONS
VIN=2V~5.5V, Switch OFF
VIN=2V~5.5V, Switch ON
VIN increasing
MIN TYP MAX UNIT
Logic-Low Voltage
Logic-High Voltage
0.8
V
V
CTL Threshold
VIH
2.0
1.3
Under-Voltage Lockout
VUVLO
∆VUVLO
ISW(ON)
ISW(OFF)
II(CTL)
1.7
0.1
25
V
Under-Voltage Hysteresis
VIN decreasing
V
switch on, VOUT=OPEN
switch off, VOUT=OPEN
VCTL=0V~5.5V
45
1
µA
µA
µA
µA
A
Supply Current
0.1
0.01
0.5
0.8
1.5
0.8
1.0
80
CTL Input Current
Output Leakage Current
IO(LEAK)
VCTL=0V, RLOAD=0ꢀ
10
1.1
2.0
US201
0.5
1.1
Current Limit
ILIMIT
RLOAD=1ꢀ
US201A
US201
A
A
VOUT=0V, measured prior
to thermal shutdown
ISC FB
(
)
Short Circuit Fold-Back Current
Switch ON Resistance
US201A
US201
A
IOUT= 500mA
IOUT=1.1A
100 mꢀ
100 mꢀ
RDS(ON)
US201A
80
I
FLG(OFF)
FLG
VFLG =5V
FLAG OFF Current
0.01
20
1
µA
R
FLAG Output Resistance
I
SINK=1mA
400
ꢀ
FLAG Delay Time
tD
tON RISE
2
10
15
ms
From fault condition to FLG assertion
10% ~ 90% of VOUT rising
(
)
Output Turn-ON Rise Time
Thermal Shutdown Protection
Thermal Shutdown Hysteresis
400
130
20
µs
℃
℃
TSD
∆TSD
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US201/US201A
Preliminary
CMOS IC
TEST CIRCUITS
RFG
VIN
VIN
FLG
VFLG
S1
A
UTC
US201/A
CI
VOUT
Chip
Enable
VOUT
CTL
GND
IOUT
IL
CO
RL
Turn-On & Off Response, Flag Response
RFG
VIN
FLG
VFLG
UTC
US201/A
CI
VOUT
VIN
VOUT
CTL
GND
VCTL
IL
CO
RL
UVLO at Rising & Falling
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US201/US201A
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
Pull-Up Resistor (10K ~ 100K)
RFG
USB
Flag Transient Filtering
10K
Controller
Supply Voltage 5V
Over -
Current
VIN
FLG
0.1µF
UTC
US201/A
1µF
VBUS
D+
D-
VOUT
CTL
Chip Enable
GND
10µF
150µF
GND
Data
Ferrite Beades
Note. A low-ESR 150μF aluminum electrolytic or tantalum between VOUT and GND is strongly recommended to meet
the 330mV maximum droop requirement in the hub VBUS
.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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