TPS254900A-Q1 Automotive USB Host Charger With Short-to-VBATT Protection |

TPS254900A-Q1 (ACTIVE)

Automotive USB Host Charger With Short-to-VBATT Protection



The TPS254900A-Q1 device is a USB charging-port controller and power switch with short-to-battery protection. This feature provides protection on OUT, DM_IN and DP_IN. These three pins withstand voltage up to 18 V.

The internal MOSFET turns off quickly when the short-to-battery condition occurs. Rapid turnoff is very important to protect the upstream DC-DC converter, processor, or hub data lines.

The TPS254900A-Q1 has a low UVLO of 3.5 V, so that the power switch does not turn off during start-stop.

The TPS254900A-Q1 45-mΩ power switch has two selectable, adjustable current limits that support port power management by changing to a lower current limit when adjacent ports are experiencing heavy loads. This is important in systems with multiple ports and upstream power supplies with limited capacity.

The TPS254900A-Q1 device has a current-sense output that is able to control an upstream supply, which allows it to maintain 5 V at the USB port even with heavy charging currents. This feature is important in systems with long USB cables where significant voltage drops can occur with fast-charging portable devices.

A current monitor allows a system to monitor the load current in real time by monitoring the IMON voltage. The current monitor is very useful and can be used for dynamic port-power management.

The TPS254900A-Q1 device also provides ESD protection capability per IEC 61000-4-2, level 4 on DP_IN and DM_IN.


  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level H2
    • Device CDM ESD Classification Level C5
  • 4.5-V to 6.5-V Input Operating Range
  • 3.5-V (typ) UVLO to Support Start-Stop
  • Integrated 45-mΩ (typ.) High-Side MOSFET
  • 3.2-A Maximum Continuous Output Current
  • VBUS ±5% Cable Compensation Accuracy at Connector
  • Supports USB BC 1.2 CDP and SDP Modes
  • Short-to-Battery Protection on OUT, DP_IN, and DM_IN Pins
  • DP_IN and DM_IN IEC 61000-4-2 Rated
    • ±8-kV Contact and ±15-kV Air Discharge
  • 20-Pin QFN (3-mm × 4-mm) Package

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Parametrics Compare all products in USB power switches & charging port controllers

Vin (Min) (V)
Vin (Max) (V)
Approx. price (US$)
Continuous current (Max) (A)
Current limit (A)
Current limit accuracy @ 1 A
Current limit topology
Number of switches
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
rDS(on) per FET (Typ) (mOhms)
TPS254900A-Q1 TPS2549-Q1 TPS254900-Q1
4.5     4.5     4.5    
6.5     6.5     6.5    
1.53 | 1ku     1.05 | 1ku     1.40 | 1ku    
3.2     3.2     3    
0.25 to 3.6     0.25 to 3.6     0.25 to 3.4    
10%     10%     10%    
Thermal Shutdown    
Thermal Shutdown    
Active High     Active High     Active High    
1     1     1    
-40 to 85     -40 to 85     -40 to 85    
WQFN | 20     WQFN | 16     WQFN | 20    
20WQFN: 12 mm2: 4 x 3 (WQFN | 20)     16WQFN: 9 mm2: 3 x 3 (WQFN | 16)     20WQFN: 12 mm2: 4 x 3 (WQFN | 20)    
Automotive     Automotive     Automotive    
45     47     45