The TPS54331 device is a 28-V, 3-A non-synchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-µA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope compensation simplifies the external compensation calculations and reduces component count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during startup and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is available in an 8-pin SOIC package and 8-pin SO PowerPAD package that have been internally optimized to improve thermal performance.
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Part number | Order | Vin (Min) (V) | Vin (Max) (V) | Vout (Min) (V) | Vout (Max) (V) | Iout (Max) (A) | Regulated outputs (#) | Switching frequency (Min) (kHz) | Switching frequency (Max) (kHz) | Iq (Typ) (mA) | Features | Control mode | Duty cycle (Max) (%) | Operating temperature range (C) | Rating | Package Group | Type | Package size: mm2:W x L (PKG) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TPS54331 |
|
3.5 | 28 | 0.8 | 25 | 3 | 1 | 570 | 570 | 0.11 |
Enable
Light Load Efficiency UVLO Adjustable Soft Start Adjustable |
Current Mode | 90 | -40 to 150 | Catalog |
SO PowerPAD | 8
SOIC | 8 |
Converter |
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
TPS54231 |
|
3.5 | 28 | 0.8 | 25 | 2 | 1 | 570 | 570 | 0.075 |
Enable
Light Load Efficiency UVLO Adjustable Soft Start Adjustable |
Current Mode | 90 | -40 to 150 | Catalog | SOIC | 8 | Converter | 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
TPS54232 |
|
3.5 | 28 | 0.8 | 25 | 2 | 1 | 1000 | 1000 | 0.085 |
Enable
Light Load Efficiency UVLO Adjustable Soft Start Adjustable |
Current Mode | 90 | -40 to 150 | Catalog | SOIC | 8 | Converter | 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
TPS54233 |
|
3.5 | 28 | 0.8 | 25 | 2 | 1 | 300 | 300 | 0.075 |
Enable
Light Load Efficiency UVLO Adjustable Soft Start Adjustable |
Current Mode | 90 | -40 to 150 | Catalog | SOIC | 8 | Converter | 8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8) |
TPS54332 |
|
3.5 | 28 | 0.8 | 25 | 3.5 | 1 | 1000 | 1000 | 0.082 |
Enable
Light Load Efficiency UVLO Adjustable Soft Start Adjustable |
Current Mode | 90 | -40 to 150 | Catalog | SO PowerPAD | 8 |