Document
UNISONIC TECHNOLOGIES CO., LTD
US223
Preliminary
HIGH-SIDE POWER SWITCHES WITH FLAG
CMOS IC
DESCRIPTION
The UTC US223 are low voltage cost-effective high-side power switches with flag function. These devices are particularly suitable for self-powered and bus-powered USB applications. The build-in N-MOSFET’s RDS(ON) which meets the requirements of USB voltage drop is as low as 80mΩ.
The UTC US223 contains a charge pump circuitry to drive the internal MOSFET switch and also incorporate such protection circuits: soft-start circuit protect these devices from being damaged by limiting inrush current during plug-in; thermal shutdown circuit is used to prevent catastrophic switch failure from high-current loads. UVLO is used to ensure that the device remains off unless there is a valid input voltage present.
A flag output is designed to indicate fault conditions to the local USB controller. lower quiescent current as 25μA making this device ideal for portable battery-operated equipment.
The UTC US223 are applied in USB Bus/Self powered hubs, USB peripherals, NB, PCs, PC card hot swap, battery-powered equipment, hot-plug power supplies, battery-charger circuits, ACPI power distribution.
4 5
3 12
SOT-25
FEATURES
* Input Voltage Varies From 3.5V to 5.5V * Built-in N-MOSFET * Output Can Be Forced Higher Than Input (Off-State) * Typical Low Supply Current:
- Switch On: 25μA (TYP) - Switch Off: 0.1μA (TYP) * Open-Drain Fault Flag Output To Indicate Fault Conditions
* Protection Circuits: - Soft-start( Hot plug-in application) - UVLO 1.7V (TYP.) - Current Limiting Protection - Thermal Shutdown Protection
* Reverse Current Flow Blocking (No Body Diode)
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US223XXL-AF5-R
US223XXG-AF5-R
Package SOT-25
Packing Tape Reel
www.unisonic.com.tw Copyright © 2017 Unisonic Technologies Co., Ltd
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QW-R129-022.b
US223
MARKING
Preliminary
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTION
PIN NO. 1 2 3 4 5
PIN NAME VIN GND CTL FLG VOUT
DESCRIPTION Power Input Voltage Ground Enable. Never let this pin floating. Open-Drain Fault Flag Output Output Voltage
BLOCK DIAGRAM
UVLO CTL
Bias Thermal Protection
Oscillator
Charge Pump
Gate Control
Current Limiting
Output Voltage Detection
Delay
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
VIN
VOUT FLG GND
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QW-R129-022.b
US223
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA = 25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage Enable Input Voltage
VIN 6.5 V VEN -0.3 ~ +6.5 V
Flag Voltage Power Dissipation (TA = 25°C)
VFLG PD
6.5 V 0.4 W
Junction Temperature Storage Temperature
TJ TSTG
150 -65~150
°C °C
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.
THERMAL DATA
PARAMETER Junction to Ambient
SYMBOL θJA
RECOMMENDED OPERATING.