Features: On-Chip Predictive Gate DriveTM for High-Efficiency Synchronous Buck Operation
Dual ±3-A TrueDriveTM Outputs
On-Board Programmable Oscillator with 1-MHz Frequency Operation
TR Input for Sequencing Operation
Overcurrent Protection using a Parallel Average Current Mode Control Loop
3 Modes to Support 2.7-V to 35-V Input Bias
Reverse Current Protection for Output Stage
User Programmable Shutdown Using SS Pin
±1.0% Initial Tolerance Bandgap Reference
High Bandwidth Error Amplifiers
Thermally Enhanced HTSSOP 20-Pin PowerPADTM Package and QFN−32 Pin
Synchronization Input
Supports Pre-Bias Applications
Application High Efficiency Non-Isolated Converters Requiring Advanced Features such as Pre-Bias Support and Tracking Capability
Point-of-Load Modules for Servers, Telecom,and Data communication Equipments
Good for Input Voltages of 3.3 V, 5.0 V,12.0 V, or Intermediate Bus Voltages
Pinout
Specifications
|
UCC2541 |
UNIT |
| Supply voltage range, VDD |
|
36 |
V |
| Supply current, IVDD |
VDD |
50 |
mA |
| Analog input voltages |
CEA−, COMP, G2C, RAMP, SS, TR, VEA− |
−0.3 to 3.6 |
V |
| VDRV |
−0.3 to 9 |
| G1, BST |
SW−0.3 to SW+9 |
| SW, SWS |
−1 to 36 |
| G2, G2S |
−1 to 9 |
| SYNCIN |
−0.3 to 8.0 |
| Sink current (peak), IOUT_SINK |
G1, G2 |
3.5 |
A |
| Source current (peak), IOUT_SOURCE |
G1, G2 |
−3.5 |
| Operating junction temperature range, TJ |
−55 to 150 |
°C |
| Storage temperature, Tstg |
−65 to 150 |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
300 |
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions"is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to GND. Currents are positive into, and negative out of the specified terminal.
DescriptionThe UCC2541 is a synchronous buck PWM controller for high current and low output voltage applications.
For higher efficiency, it incorporates the Predictive Gate DriveTM technology that virtually eliminates body diode conduction losses in synchronous rectifiers.
The UCC2541 is available in the extended temperature range of 40 to 105 and is offered in thermally enhanced PowerPADTM 20-pin HTSSOP (PWP) or 32-pin quad flatpack (RHB) package. This space saving package with standard 20-pin TSSOP footprint has a drastically lower thermal resistance of 1.4°C/W JC to accommodate the dual high-current drivers on board.
UCC2541 Data Sheet
