Refer to the PDF data sheet for device specific package drawings
The TPS549D22 device is a compact single buck converter with adaptive on-time, D-CAP3 mode control. It is designed for high accuracy, high efficiency, fast transient response, ease-of-use, low external component count and space-conscious power systems.
This device features full differential sense, TI integrated FETs with a high-side on-resistance of 2.9 mΩ and a low-side on-resistance of 1.2 mΩ. The device also features accurate 0.5%, 0.9-V reference with an ambient temperature range between –40°C and +125°C. Competitive features include: very low external component count, accurate load regulation and line regulation, auto-skip or FCCM mode operation, and internal soft-start control.
The TPS549D22 device is available in 7-mm × 5-mm, 40-pin, LQFN-CLIP (RVF) package (RoHs exempt).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS549D22 | LQFN-CLIP (40) | 7.00 mm × 5.00 mm |
Changes from * Revision (August 2016) to A Revision
PIN | I/O/P(1) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
AGND | 30 | G | Ground pin for internal analog circuits. |
BOOT | 5 | P | Supply rail for high-side gate driver (boot terminal). Connect boot capacitor from this pin to SW node. Internally connected to BP via bootstrap PMOS switch. |
BP | 31 | O | LDO output |
DRGND | 29 | P | Internal gate driver return. |
EN_UVLO | 4 | I | Enable pin that can turn on the DC/DC switching converter. Use also to program the required PVIN UVLO when PVIN and VDD are connected together. |
ADDR | 32 | I | Program device address and SKIP or FCCM mode. |
ILIM | 36 | I/O | Program overcurrent limit by connecting a resistor to ground. |
MODE | 34 | I | Mode selection pin. Select the control mode (DCAP3 or DCAP), and soft-start timing selection. |
NC | 27 | No connect. | |
PGND | 13, 14, 15, 16, 17, 18, 19, 20 | P | Power ground of internal FETs. |
PGOOD | 35 | O | Open drain power good status signal. |
PMB_CLK | 3 | I | Clock input for the PMBus interface. |
PMB_DATA | 2 | I/O | Data I/O for the PMBus interface. |
PVIN | 21, 22, 23, 24, 25, 26 | P | Power supply input for integrated power MOSFET pair. |
RSN | 38 | I | Inverting input of the differential remote sense amplifier. |
RSP | 39 | I | Non-inverting input of the differential remote sense amplifier. |
RESV_TRK | 37 | I | Do not connect. |
SMB_ALRT# | 1 | O | Alert output for the PMBus interface. |
SW | 6 , 7, 8, 9, 10, 11, 12 | I/O | Output switching terminal of power converter. Connect the pins to the output inductor. |
VDD | 28 | P | Controller power supply input. |
VOSNS | 40 | I | Output voltage monitor input pin. |
VSEL | 33 | I | Program the initial start-up and or reference voltage without feedback resistor dividers (from 0.6 V to 1.2 V in 50-mV increments). |