US203 Datasheet, PDF (1/8 Pages) Unisonic Technologies – 80mΩ, 0.6/1.5A HIGH-SIDE POWER SWITCHES WITH FLAG

UNISONIC TECHNOLOGIES CO., LTD
US203
Preliminary
80mΩ, 0.6/1.5A HIGH-SIDE POWER
SWITCHES WITH FLAG
„ DESCRIPTION
The UTC US203 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 R_DS(ON) which
meets the requirements of USB voltage drop is as low as 80mΩ.
The UTC US203 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. Fault current is limited to typically 2.5A for UTC US203AH/AL in
dual ports and 1A for UTC US203CH/CL in single port in accordance with the
USB power requirements, lower quiescent current as 25μA making this
device ideal for portable battery-operated equipment.
The UTC US203 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.
„ FEATURES
* Input Voltage Varies From 2.5V 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: 1μA (TYP)
* Guaranteed Continuous Load Current: 1.5A for US203AH/AL and 0.6A for
* US203CH/CL
* 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
US203XXL-AF5-R
US203XXG-AF5-R
US203XXL-S08-R
US203XXG-S08-R
Package
SOT-25
SOP-8
CMOS IC
4
5
3
12
SOT-25
1
SOP-8
Packing
Tape Reel
Tape Reel
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