The TPS54A24 is a full-featured 17-V, 10-A synchronous step-down DC/DC converter in a standard 4 mm × 4 mm WQFN package.
The device is optimized for small solution size through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through peak-current-mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor footprint.
The peak-current-mode control simplifies the loop compensation and provides fast transient response. Cycle-by-cycle peak current limiting on the high-side and low-side sourcing current limit protects the device in overload situations. Hiccup limits MOSFET power dissipation if a short circuit or over loading fault persists.
A power-good supervisor circuit monitors the regulator output. The PGOOD pin is an open-drain output and goes high impedance when the output voltage is in regulation. An internal deglitch time prevents the PGOOD pin from pulling low unless a fault has occurred.
A dedicated EN pin can be used to control the regulator on/off and adjust the input undervoltage lockout. The output voltage start-up ramp is controlled by the SS/TRK pin, which allows operation as either a standalone power supply or in tracking situations.
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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) |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TPS54A24 |
|
4.5 | 17 | 0.6 | 12 | 10 | 1 | 200 | 1600 | 0.58 |
Enable
Frequency Synchronization Power Good Pre-Bias Start-Up Synchronous Rectification Tracking |
Current Mode | 98 | -40 to 150 | Catalog | WQFN | 24 | Converter | 24WQFN: 16 mm2: 4 x 4 (WQFN | 24) |
TPS54020 |
|
4.5 | 17 | 0.6 | 5 | 10 | 1 | 200 | 1200 | 0.6 |
Adjustable Current Limit
Enable Frequency Synchronization Light Load Efficiency Phase Interleaving Power Good Pre-Bias Start-Up Synchronous Rectification Tracking Soft Start Adjustable |
Current Mode | 98 | -40 to 150 | Catalog | VQFN-HR | 15 | Converter | 15VQFN-HR: 12 mm2: 3.5 x 3.5 (VQFN-HR | 15) |
TPS54824 |
|
4.5 | 17 | 0.6 | 12 | 8 | 1 | 200 | 1600 | 0.58 |
Enable
Frequency Synchronization Power Good Pre-Bias Start-Up Synchronous Rectification Tracking Soft Start Adjustable |
Current Mode | 98 | -40 to 150 | Catalog | VQFN-HR | 18 | Converter | 18VQFN-HR: 12 mm2: 3.5 x 3.5 (VQFN-HR | 18) |