Refer to the PDF data sheet for device specific package drawings
TPSM8281x is a family of pin-to-pin compatible, high-efficiency, and easy to use synchronous step-down DC/DC power modules with integrated inductors with output currents ranging from 1A up to 4A. The devices use a fixed-frequency peak current-mode control topology and support high power density requirements for telecommunication, test and measurement, and medical applications. Low resistance switches allow up to 4A continuous output current at high ambient temperatures. The switching frequency is adjustable from 1.8MHz to 4MHz and can also be synchronized to an external clock. In PFM/PWM mode, the TPSM8281x maintains high efficiency over the whole load range. The devices provide 1% output voltage accuracy in PWM mode, which eases designing precise power supplies. The SS/TR pin can be used to limit inrush current through a precise start-up ramp, or for sequencing by tracking the output voltage to an external voltage applied to this pin.
PART NUMBER(3) | OUTPUT CURRENT | PACKAGE(1) | BODY SIZE(2) (NOM) |
---|---|---|---|
TPSM82810 | 4A | SIL (µSiL, 14) | 3.0mm × 4.0mm × 2.4mm |
TPSM82813 | 3A | SIL (µSiL, 14) | 3.0mm × 4.0mm × 2.4mm |
VCA (QFN, 13) | 2.5mm × 3.0mm × 1.95mm | ||
TPSM82812(4) | 2A | VCA (QFN, 13) | 2.5mm × 3.0mm × 1.95mm |
TPSM82811(4) | 1A |
PIN | TYPE(1) | DESCRIPTION | ||
---|---|---|---|---|
NAME |
SIL |
VCA |
||
EN | 2 | 9 | I | This pin is the enable pin of the device. Connect to logic low to disable the device. Pull high to enable the device. Do not leave this pin unconnected. |
FB | 7 | 3 | I | Voltage feedback input. Connect the output voltage resistor divider to this pin. |
GND | 6, 10, 13, 14 | 2, 6, 12 | Ground pin | |
MODE/SYNC | 4 | 11 | I | The device runs in PFM/PWM mode when this pin is pulled low. When the pin is pulled high, the device runs in forced PWM mode. Do not leave this pin unconnected. The MODE/SYNC pin can also be used to synchronize the device to an external frequency. See Section 9.3.2. |
COMP/FSET | 9 | 5 | I | Device compensation and frequency set input. A resistor from this pin to GND defines the compensation of the control loop as well as the switching frequency if not externally synchronized. The switching frequency is set to 2.25 MHz if the pin is tied to GND or VIN. See Table 8-1. Do not leave this pin unconnected. |
PG | 3 | 10 | O | Open-drain power-good output with window comparator. This pin is pulled to GND while VOUT is outside the power-good threshold. This pin can be left open or tied to GND if not used. A pullup resistor can be connected to any voltage not larger than VIN. |
SS/TR | 8 | 4 | I | Soft-start, tracking pin. A capacitor connected from this pin to GND defines the output voltage rise time. The pin can also be used as an input for tracking and sequencing - see Voltage Tracking. |
VOUT | 5 | 1 | Output voltage pin. This pin is internally connected to the integrated inductor. | |
VIN | 1, 11, 12 | 8, 13 | Power supply input. Connect the input capacitor as close as possible between the VIN and GND pins. | |
SW | — | 7 | O | This pin is the switch pin of the converter. This pin is connected to the internal power MOSFET and the inductor. Leave this pin unconnected for best EMI performance. |
MIN | MAX | UNIT | ||
---|---|---|---|---|
Pin voltage(2) | VIN, EN, MODE/SYNC | –0.3 | 6.5 | V |
SW (VCA package only) | –0.3 | VIN+0.3 | V | |
SW (transient for less than 10 ns, VCA package only, while switching) | –3 | 10 | V | |
FB | –0.3 | 4 | V | |
COMP/FSET, PG, SS/TR, VOUT | –0.3 | VIN+0.3 | V | |
ISINK_PG | Sink current at PG pin | 10 | mA | |
TJ | Operating junction temperature | –40 | 125 | °C |
Tstg | Storage temperature | –40 | 125 | °C |
VALUE | UNIT | |||
---|---|---|---|---|
V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
Charged device model (CDM), per ANSI/ESDA/JEDEC JS-002(2) | ±500 |