Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage regulators - DC DC switch controllers D-CAP™, D-CAP2™ WQFN 16

VREF

REFIN

GSNS

VSNS

PGOOD

16 15 14 13

5 6 7

MODE

BST

PGND

GND

COMP

TRIP

TPS51219

PowerPAD

TPS51219

www.ti.com

SLUSAG1B –MARCH 2011– REVISED OCTOBER 2011

DEVICE INFORMATION

RTE PACKAGE (TOP VIEW)

PIN FUNCTIONS

I/O DESCRIPTION

NAME NO.

BST 13 I High-side MOSFET gate driver bootstrap voltage input. Connect a capacitor from the BST pin to the SW pin.

Connection for the DC compensation integrator for improved load-line performance. Connect a capacitor from

this pin to the VSNS pin (when operating in D-CAP2 mode), or to the positive terminal of the output capacitor

COMP 5 I

(when operating in D-CAP mode). Connect directly to the VSNS pin without capacitor to disable the integrator

function.

DH 11 O High-side MOSFET gate driver output.

DL 10 O Low-side MOSFET gate driver output.

EN 14 I Enable pin. 3.3-V I/O level, 100 ns de-bounce. Short to GND to disable the device.

GND 7 – Device analog ground; Connect to a quiet point on the system GND plane

GSNS 3 I Voltage sense return tied directly to the GND sense point of the load. Short to GND if remote sense is not used.

Connect a resistor to GND to configure switching frequency, control mode and current sense scheme. (See

MODE 15 I

Table 2)

Synchronous low-side MOSFET gate driver return. Also serve as the current sensing input (+). Connect to the

PGND 8 –

GND pin as close as possible to the device.

PGOOD 16 O Powergood signal open drain output. PGOOD goes high when the output voltage is within the target range.

REFIN 2 I Output voltage setting pin. See the VREF and REFIN, Output Voltage section.

SW 12 I/O High-side MOSFET gate driver return. R

DS(on)

current sensing input (–) when using R

DS(on)

current sensing.

Current sense comparator input (-) for resistor current sensing. Or overcurrent threshold setting pin for R

DS(on)

TRIP 6 I current sensing if connected to GND through an OCL setting resistor. For R

DS(on)

current sensing operation, 10

μA at room temperature, T

=4700ppm/°C, is sourced to set the trip voltage.

VSNS 4 I Voltage sense line tied directly to the load voltage sense point.

VREF 1 O 2.0-V ±0.8% voltage reference output.

V5 9 I 5V power supply input for internal circuits and MOSFET gate drivers.

Thermal

– – Thermal pad. Connect directly to system GND plane with multiple vias.

pad