Datasheet

UNISONIC TECHNOLOGIES CO., LTD
US301
Preliminary
CMOS IC
0.2A SINGLE CHANNEL
CURRENT-LIMITED LOAD
SWITCH

DESCRIPTION
The UTC US301 is single channel current-limited integrated
high-side power switches, optimized for hot-swap applications.
The US301 provides a complete protection solution for
application subject to heavy capacitive loads and the prospect of
short circuit. The devices have fast short-circuit response time for
improving overall system robustness, and offer reverse-current
blocking, over-current and over-temperature protection, as well as
under-voltage lockout functionality. It also has controlled built-in
soft-start time, typically 0.7 ms.

FEATURES
* Input voltage range: 2.7V~5.2V
* Short-circuit protection and fast response time
* Accurate current limiting: 0.4A
* On-resistance:250 mΩ
* Reverse-current blocking
* Soft-start with 0.7ms typical turn-on time
* Over-current and over-voltage protection
* Thermal protection
* Ambient temperature range: -40°C~+85°C

ORDERING INFORMATION
Ordering Number
US301G-AE2-R

Package
SOT-23-3
Packing
Tape Reel
MARKING
301G
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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US301
Preliminary

PIN CONFIGURATION

PIN DESCRIPTION
PIN NO.
1
2
3
PIN NAME
GND
OUT
IN
CMOS IC
DESCRIPTION
GND
Switch output pin
Voltage input pin
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US301

Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage Relative to GND
VIN
6.5
V
Output Voltage Relative to GND
VOUT
VIN+0.3
V
Maximum Continuous Load Current
ILOAD
Internal Limited
A
Maximum Junction Temperature
TJ
150
°C
Storage Temperature Range (Note 4)
TSTG
-65~150
°C
Notes: 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. UL Recognized Rating from -30°C~70°C (Diodes qualified TST from -65°C~150°C)

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Input voltage relative to GND
Output Current
Operating Ambient Temperature

SYMBOL
VIN
IOUT
TA
TEST CONDITIONS
MIN
2.7
0
-40
TYP
MAX
5.2
0.2
+85
UNIT
V
A
°C
ELECTRICAL CHARACTERISTICS (TA=25°C, VIN=+5.0V, unless otherwise stated)
PARAMETER
SYMBOL TEST CONDITIONS (Note 1) MIN
TYP MAX UNIT
Input UVLO
VUVLO
VIN rising
2.35
2.90
V
Input Quiescent Current
IQ
Above UVLO, IOUT=0
85
125
µA
Reverse Leakage Current
IREV
VIN=0V, VOUT=5V, IREV at VIN
0.01
0.10
µA
Switch On-Resistance
RDS(ON) VIN=5V, IOUT=0.2A
100
250
350
mΩ
Over-Load Current Limit
ILIMIT
VIN=5V, VOUT=4V
0.2
0.4
0.5
A
Short-Circuit Current
IOS
OUT shorted to ground
0.2
0.4
0.5
A
Reverse-Current Trigger Point
IROCP
VIN=5.0V, VOUT=5.2V
0.20
0.25
A
Deglitch Time from Reverse Current Trigger
TTRIG
(Note 2)
0.5
0.7
1.0
ms
to MOSFET Turn Off
Output Over-Voltage Trip Point
VOVP
(Note 3)
5.2
5.6
V
Debounce Time From Output Over-Voltage
TOVP
15
µs
to MOSFET Turn Off
Recovery After Turn-Off from ROCP and
VREC
101%
VIN
OVP
CL=0.1µF, RLOAD=20Ω
0.7
ms
Output turn-on time (Note 4)
TON
(UVLO to 90% VOUT-NOM)
Thermal Shutdown Threshold
TSHDN
VIN=2.7V~5.2V
150
°C
Thermal Shutdown Hysteresis
THYS
20
°C
Thermal Resistance Junction-to-Ambient
θJA
215
°C/W
(Note 5)
Notes: 1. Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must
be taken into account separately.
2. When reverse current triggers at IROCP=0.20A, the reverse current is continuously clamped at IROCP for
0.7ms deglitch time until MOSFET is turned off.
3. During output over-voltage protection, the output draws approximately 60µA current.
4. Since the output turn-on slew rate is dependent on input supply slew rate, this limit is only applicable for
input supply slew rate between VIN/0.2ms to VIN/1ms.
5. Device mounted on FR-4 substrate PCB, 2oz copper, with minimum recommended pad layout.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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US301

Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
Power supply
2.7~5.2V
IN
Load
OUT
0.1µF
0.1µF
GND
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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