デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
The TPS62152-Q1 device is an easy-to-use
synchronous step-down dc-dc converter optimized for applications with high power density and features a fixed 3.3-V output with a current capability of up to
1 A. A high switching frequency of 2.5 MHz (typical) allows the use of small inductors and provides fast transient response as well as high output-voltage accuracy by use of the DCS-Control topology.
With a wide operating input voltage range of 4 V to 17 V, the device is ideally suited for systems powered from either a Li-Ion or other batteries as well as from 12-V intermediate power rails.
The soft-start pin controls the output voltage start-up ramp, which allows operation either as a standalone power supply or in tracking configurations. Power sequencing is also possible by configuring the enable and open-drain power-good pins.
In power-save mode, the device draws quiescent current of about 17 μA from VIN. Power-save mode, entered automatically and seamlessly if the load is small, maintains high efficiency over the entire load range. Entering shutdown mode turns the device off, and shutdown current consumption is less than 2 μA.
The device package is a 16-pin VQFN measuring
3-mm × 3-mm (RGT) and has an exposed thermal pad for better thermal performance.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS62152-Q1 | VQFN (16) | 3.00 mm × 3.00 mm |
Changes from A Revision (July 2013) to B Revision
Changes from * Revision (July 2013) to A Revision
PIN(1) | TYPE(2) | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
AGND | 6 | G | Analog ground. Connected AGND directly to the exposed thermal pad and common ground plane. |
AVIN | 10 | S | Supply voltage for control circuitry. Connect to the same source as PVIN. |
DEF | 8 | I | Output voltage scaling (Low = nominal, High = nominal + 5%)(4) |
EN | 13 | I | Enable input (High = enabled, Low = disabled)(4) |
FB | 5 | I | TI recommends connecting FB to AGND for improved thermal performance. |
FSW | 7 | I | Switching frequency select (Low ≈ 2.5 MHz, High ≈ 1.25 MHz(3) for typical operation)(4) |
PG | 4 | O | Output power good (High = VOUT ready, Low = VOUT below nominal regulation); open drain (requires pullup resistor; goes high-impedance when device is switched off) |
PGND | 15 | G | Power ground. Must be connected directly to the exposed thermal pad and common ground plane. |
16 | |||
PVIN | 11 | S | Supply voltage for power stage. Connect to same source as AVIN. |
12 | |||
SS/TR | 9 | I | Soft-start or tracking pin. An external capacitor connected to this pin sets the internal voltage-reference rise time. The pin can be used for tracking and sequencing. |
SW | 1 | O | Switch node, which is connected to the internal MOSFET switches. Connect inductor between SW and output capacitor. |
2 | |||
3 | |||
VOS | 14 | I | Output-voltage sense pin and connection for the control-loop circuitry. |
Exposed thermal pad | — | Connect to AGND (pin 6), PGND (pins 15,16) and common ground plane(5). Solder to PCB to achieve appropriate power dissipation and mechanical reliability. |